java/9 : java.base/jdk/internal/org/objectweb/asm/util/Printer.java

Printer
https://openjdk.java.net/
GPLv2 + Classpath Exception
/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Oracle in the LICENSE file that accompanied this code.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 */

/*
 * This file is available under and governed by the GNU General Public
 * License version 2 only, as published by the Free Software Foundation.
 * However, the following notice accompanied the original version of this
 * file:
 *
 * ASM: a very small and fast Java bytecode manipulation framework
 * Copyright (c) 2000-2011 INRIA, France Telecom
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. Neither the name of the copyright holders nor the names of its
 *    contributors may be used to endorse or promote products derived from
 *    this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
 * THE POSSIBILITY OF SUCH DAMAGE.
 */
package jdk.internal.org.objectweb.asm.util;

import java.io.PrintWriter;
import java.util.ArrayList;
import java.util.List;

import jdk.internal.org.objectweb.asm.Attribute;
import jdk.internal.org.objectweb.asm.Handle;
import jdk.internal.org.objectweb.asm.Label;
import jdk.internal.org.objectweb.asm.Opcodes;
import jdk.internal.org.objectweb.asm.TypePath;

An abstract converter from visit events to text.
Author: Eric Bruneton/**
 * An abstract converter from visit events to text.
 *
 * @author Eric Bruneton
 */
public abstract class Printer {

    The names of the Java Virtual Machine opcodes.
/**
     * The names of the Java Virtual Machine opcodes.
     */
    public static final String[] OPCODES;

    The names of the for operand parameter values of the MethodVisitor.visitIntInsn method when opcode is NEWARRAY.
/**
     * The names of the for <code>operand</code> parameter values of the
     * {@link jdk.internal.org.objectweb.asm.MethodVisitor#visitIntInsn} method when
     * <code>opcode</code> is <code>NEWARRAY</code>.
     */
    public static final String[] TYPES;

    The names of the tag field values for Handle. /**
     * The names of the <code>tag</code> field values for
     * {@link jdk.internal.org.objectweb.asm.Handle}.
     */
    public static final String[] HANDLE_TAG;

    static {
        String s = "NOP,ACONST_NULL,ICONST_M1,ICONST_0,ICONST_1,ICONST_2,"
                + "ICONST_3,ICONST_4,ICONST_5,LCONST_0,LCONST_1,FCONST_0,"
                + "FCONST_1,FCONST_2,DCONST_0,DCONST_1,BIPUSH,SIPUSH,LDC,,,"
                + "ILOAD,LLOAD,FLOAD,DLOAD,ALOAD,,,,,,,,,,,,,,,,,,,,,IALOAD,"
                + "LALOAD,FALOAD,DALOAD,AALOAD,BALOAD,CALOAD,SALOAD,ISTORE,"
                + "LSTORE,FSTORE,DSTORE,ASTORE,,,,,,,,,,,,,,,,,,,,,IASTORE,"
                + "LASTORE,FASTORE,DASTORE,AASTORE,BASTORE,CASTORE,SASTORE,POP,"
                + "POP2,DUP,DUP_X1,DUP_X2,DUP2,DUP2_X1,DUP2_X2,SWAP,IADD,LADD,"
                + "FADD,DADD,ISUB,LSUB,FSUB,DSUB,IMUL,LMUL,FMUL,DMUL,IDIV,LDIV,"
                + "FDIV,DDIV,IREM,LREM,FREM,DREM,INEG,LNEG,FNEG,DNEG,ISHL,LSHL,"
                + "ISHR,LSHR,IUSHR,LUSHR,IAND,LAND,IOR,LOR,IXOR,LXOR,IINC,I2L,"
                + "I2F,I2D,L2I,L2F,L2D,F2I,F2L,F2D,D2I,D2L,D2F,I2B,I2C,I2S,LCMP,"
                + "FCMPL,FCMPG,DCMPL,DCMPG,IFEQ,IFNE,IFLT,IFGE,IFGT,IFLE,"
                + "IF_ICMPEQ,IF_ICMPNE,IF_ICMPLT,IF_ICMPGE,IF_ICMPGT,IF_ICMPLE,"
                + "IF_ACMPEQ,IF_ACMPNE,GOTO,JSR,RET,TABLESWITCH,LOOKUPSWITCH,"
                + "IRETURN,LRETURN,FRETURN,DRETURN,ARETURN,RETURN,GETSTATIC,"
                + "PUTSTATIC,GETFIELD,PUTFIELD,INVOKEVIRTUAL,INVOKESPECIAL,"
                + "INVOKESTATIC,INVOKEINTERFACE,INVOKEDYNAMIC,NEW,NEWARRAY,"
                + "ANEWARRAY,ARRAYLENGTH,ATHROW,CHECKCAST,INSTANCEOF,"
                + "MONITORENTER,MONITOREXIT,,MULTIANEWARRAY,IFNULL,IFNONNULL,";
        OPCODES = new String[200];
        int i = 0;
        int j = 0;
        int l;
        while ((l = s.indexOf(',', j)) > 0) {
            OPCODES[i++] = j + 1 == l ? null : s.substring(j, l);
            j = l + 1;
        }

        s = "T_BOOLEAN,T_CHAR,T_FLOAT,T_DOUBLE,T_BYTE,T_SHORT,T_INT,T_LONG,";
        TYPES = new String[12];
        j = 0;
        i = 4;
        while ((l = s.indexOf(',', j)) > 0) {
            TYPES[i++] = s.substring(j, l);
            j = l + 1;
        }

        s = "H_GETFIELD,H_GETSTATIC,H_PUTFIELD,H_PUTSTATIC,"
                + "H_INVOKEVIRTUAL,H_INVOKESTATIC,H_INVOKESPECIAL,"
                + "H_NEWINVOKESPECIAL,H_INVOKEINTERFACE,";
        HANDLE_TAG = new String[10];
        j = 0;
        i = 1;
        while ((l = s.indexOf(',', j)) > 0) {
            HANDLE_TAG[i++] = s.substring(j, l);
            j = l + 1;
        }
    }

    The ASM API version implemented by this class. The value of this field must be one of Opcodes.ASM4 or Opcodes.ASM5. /**
     * The ASM API version implemented by this class. The value of this field
     * must be one of {@link Opcodes#ASM4} or {@link Opcodes#ASM5}.
     */
    protected final int api;

    A buffer that can be used to create strings.
/**
     * A buffer that can be used to create strings.
     */
    protected final StringBuffer buf;

    The text to be printed. Since the code of methods is not necessarily
visited in sequential order, one method after the other, but can be
interlaced (some instructions from method one, then some instructions
from method two, then some instructions from method one again...), it is
not possible to print the visited instructions directly to a sequential
stream. A class is therefore printed in a two steps process: a string
tree is constructed during the visit, and printed to a sequential stream
at the end of the visit. This string tree is stored in this field, as a
string list that can contain other string lists, which can themselves
contain other string lists, and so on.
/**
     * The text to be printed. Since the code of methods is not necessarily
     * visited in sequential order, one method after the other, but can be
     * interlaced (some instructions from method one, then some instructions
     * from method two, then some instructions from method one again...), it is
     * not possible to print the visited instructions directly to a sequential
     * stream. A class is therefore printed in a two steps process: a string
     * tree is constructed during the visit, and printed to a sequential stream
     * at the end of the visit. This string tree is stored in this field, as a
     * string list that can contain other string lists, which can themselves
     * contain other string lists, and so on.
     */
    public final List<Object> text;

    Constructs a new Printer. 
Params: api –  the ASM API version implemented by this printer. Must be one of Opcodes.ASM4 or Opcodes.ASM5./**
     * Constructs a new {@link Printer}.
     *
     * @param api
     *            the ASM API version implemented by this printer. Must be one
     *            of {@link Opcodes#ASM4} or {@link Opcodes#ASM5}.
     */
    protected Printer(final int api) {
        this.api = api;
        this.buf = new StringBuffer();
        this.text = new ArrayList<Object>();
    }

    Class header. See ClassVisitor.visit. 
Params: version – 
           the class version.
access –  the class's access flags (see Opcodes). This parameter also indicates if the class is deprecated.
name –  the internal name of the class (see getInternalName).
signature – 
           the signature of this class. May be null if the class
           is not a generic one, and does not extend or implement generic
           classes or interfaces.
superName –  the internal of name of the super class (see getInternalName). For interfaces, the super class is Object. May be null, but only for the Object class.
interfaces –  the internal names of the class's interfaces (see getInternalName). May be null./**
     * Class header.
     * See {@link jdk.internal.org.objectweb.asm.ClassVisitor#visit}.
     *
     * @param version
     *            the class version.
     * @param access
     *            the class's access flags (see {@link Opcodes}). This parameter
     *            also indicates if the class is deprecated.
     * @param name
     *            the internal name of the class (see
     *            {@link jdk.internal.org.objectweb.asm.Type#getInternalName() getInternalName}).
     * @param signature
     *            the signature of this class. May be <tt>null</tt> if the class
     *            is not a generic one, and does not extend or implement generic
     *            classes or interfaces.
     * @param superName
     *            the internal of name of the super class (see
     *            {@link jdk.internal.org.objectweb.asm.Type#getInternalName() getInternalName}).
     *            For interfaces, the super class is {@link Object}. May be
     *            <tt>null</tt>, but only for the {@link Object} class.
     * @param interfaces
     *            the internal names of the class's interfaces (see
     *            {@link jdk.internal.org.objectweb.asm.Type#getInternalName() getInternalName}).
     *            May be <tt>null</tt>.
     */
    public abstract void visit(final int version, final int access,
            final String name, final String signature, final String superName,
            final String[] interfaces);

    Class source. See ClassVisitor.visitSource. 
Params: source – 
           the name of the source file from which the class was compiled.
           May be null.
debug – 
           additional debug information to compute the correspondance
           between source and compiled elements of the class. May be
           null./**
     * Class source.
     * See {@link jdk.internal.org.objectweb.asm.ClassVisitor#visitSource}.
     *
     * @param source
     *            the name of the source file from which the class was compiled.
     *            May be <tt>null</tt>.
     * @param debug
     *            additional debug information to compute the correspondance
     *            between source and compiled elements of the class. May be
     *            <tt>null</tt>.
     */
    public abstract void visitSource(final String source, final String debug);

    Class outer class. See ClassVisitor.visitOuterClass. Visits the enclosing class of the class. This method must be called only if the class has an enclosing class. 
Params: owner – 
           internal name of the enclosing class of the class.
name – 
           the name of the method that contains the class, or
           null if the class is not enclosed in a method of its
           enclosing class.
desc – 
           the descriptor of the method that contains the class, or
           null if the class is not enclosed in a method of its
           enclosing class./**
     * Class outer class.
     * See {@link jdk.internal.org.objectweb.asm.ClassVisitor#visitOuterClass}.
     *
     * Visits the enclosing class of the class. This method must be called only
     * if the class has an enclosing class.
     *
     * @param owner
     *            internal name of the enclosing class of the class.
     * @param name
     *            the name of the method that contains the class, or
     *            <tt>null</tt> if the class is not enclosed in a method of its
     *            enclosing class.
     * @param desc
     *            the descriptor of the method that contains the class, or
     *            <tt>null</tt> if the class is not enclosed in a method of its
     *            enclosing class.
     */
    public abstract void visitOuterClass(final String owner, final String name,
            final String desc);

    Class annotation. See ClassVisitor.visitAnnotation. 
Params: desc – 
           the class descriptor of the annotation class.
visible – 
           true if the annotation is visible at runtime.
Returns: the printer/**
     * Class annotation.
     * See {@link jdk.internal.org.objectweb.asm.ClassVisitor#visitAnnotation}.
     *
     * @param desc
     *            the class descriptor of the annotation class.
     * @param visible
     *            <tt>true</tt> if the annotation is visible at runtime.
     * @return the printer
     */
    public abstract Printer visitClassAnnotation(final String desc,
            final boolean visible);

    Class type annotation. See ClassVisitor.visitTypeAnnotation. 
Params: typeRef –  a reference to the annotated type. The sort of this type reference must be CLASS_TYPE_PARAMETER, CLASS_TYPE_PARAMETER_BOUND or CLASS_EXTENDS. See TypeReference.
typePath – 
           the path to the annotated type argument, wildcard bound, array
           element type, or static inner type within 'typeRef'. May be
           null if the annotation targets 'typeRef' as a whole.
desc – 
           the class descriptor of the annotation class.
visible – 
           true if the annotation is visible at runtime.
Returns: the printer/**
     * Class type annotation.
     * See {@link jdk.internal.org.objectweb.asm.ClassVisitor#visitTypeAnnotation}.
     *
     * @param typeRef
     *            a reference to the annotated type. The sort of this type
     *            reference must be
     *            {@link jdk.internal.org.objectweb.asm.TypeReference#CLASS_TYPE_PARAMETER CLASS_TYPE_PARAMETER},
     *            {@link jdk.internal.org.objectweb.asm.TypeReference#CLASS_TYPE_PARAMETER_BOUND CLASS_TYPE_PARAMETER_BOUND}
     *            or {@link jdk.internal.org.objectweb.asm.TypeReference#CLASS_EXTENDS CLASS_EXTENDS}.
     *            See {@link jdk.internal.org.objectweb.asm.TypeReference}.
     * @param typePath
     *            the path to the annotated type argument, wildcard bound, array
     *            element type, or static inner type within 'typeRef'. May be
     *            <tt>null</tt> if the annotation targets 'typeRef' as a whole.
     * @param desc
     *            the class descriptor of the annotation class.
     * @param visible
     *            <tt>true</tt> if the annotation is visible at runtime.
     * @return the printer
     */
    public Printer visitClassTypeAnnotation(final int typeRef,
            final TypePath typePath, final String desc, final boolean visible) {
        throw new RuntimeException("Must be overriden");
    }

    Class attribute. See ClassVisitor.visitAttribute. 
Params: attr – 
           an attribute./**
     * Class attribute.
     * See {@link jdk.internal.org.objectweb.asm.ClassVisitor#visitAttribute}.
     *
     * @param attr
     *            an attribute.
     */
    public abstract void visitClassAttribute(final Attribute attr);

    Class inner name. See ClassVisitor.visitInnerClass. 
Params: name –  the internal name of an inner class (see getInternalName).
outerName –  the internal name of the class to which the inner class belongs (see getInternalName). May be null for not member classes.
innerName – 
           the (simple) name of the inner class inside its enclosing
           class. May be null for anonymous inner classes.
access – 
           the access flags of the inner class as originally declared in
           the enclosing class./**
     * Class inner name.
     * See {@link jdk.internal.org.objectweb.asm.ClassVisitor#visitInnerClass}.
     *
     * @param name
     *            the internal name of an inner class (see
     *            {@link jdk.internal.org.objectweb.asm.Type#getInternalName() getInternalName}).
     * @param outerName
     *            the internal name of the class to which the inner class
     *            belongs (see {@link jdk.internal.org.objectweb.asm.Type#getInternalName() getInternalName}).
     *            May be <tt>null</tt> for not member classes.
     * @param innerName
     *            the (simple) name of the inner class inside its enclosing
     *            class. May be <tt>null</tt> for anonymous inner classes.
     * @param access
     *            the access flags of the inner class as originally declared in
     *            the enclosing class.
     */
    public abstract void visitInnerClass(final String name,
            final String outerName, final String innerName, final int access);

    Class field. See ClassVisitor.visitField. 
Params: access –  the field's access flags (see Opcodes). This parameter also indicates if the field is synthetic and/or deprecated.
name – 
           the field's name.
desc –  the field's descriptor (see Type).
signature – 
           the field's signature. May be null if the field's
           type does not use generic types.
value – 
           the field's initial value. This parameter, which may be
           null if the field does not have an initial value, must be an Integer, a Float, a Long, a Double or a String (for int,
           float, long or String fields
           respectively). This parameter is only used for static
           fields. Its value is ignored for non static fields, which
           must be initialized through bytecode instructions in
           constructors or methods.
Returns: the printer/**
     * Class field.
     * See {@link jdk.internal.org.objectweb.asm.ClassVisitor#visitField}.
     *
     * @param access
     *            the field's access flags (see {@link Opcodes}). This parameter
     *            also indicates if the field is synthetic and/or deprecated.
     * @param name
     *            the field's name.
     * @param desc
     *            the field's descriptor (see {@link jdk.internal.org.objectweb.asm.Type Type}).
     * @param signature
     *            the field's signature. May be <tt>null</tt> if the field's
     *            type does not use generic types.
     * @param value
     *            the field's initial value. This parameter, which may be
     *            <tt>null</tt> if the field does not have an initial value,
     *            must be an {@link Integer}, a {@link Float}, a {@link Long}, a
     *            {@link Double} or a {@link String} (for <tt>int</tt>,
     *            <tt>float</tt>, <tt>long</tt> or <tt>String</tt> fields
     *            respectively). <i>This parameter is only used for static
     *            fields</i>. Its value is ignored for non static fields, which
     *            must be initialized through bytecode instructions in
     *            constructors or methods.
     * @return the printer
     */
    public abstract Printer visitField(final int access, final String name,
            final String desc, final String signature, final Object value);

    Class method. See ClassVisitor.visitMethod. 
Params: access –  the method's access flags (see Opcodes). This parameter also indicates if the method is synthetic and/or deprecated.
name – 
           the method's name.
desc –  the method's descriptor (see Type).
signature – 
           the method's signature. May be null if the method
           parameters, return type and exceptions do not use generic
           types.
exceptions –  the internal names of the method's exception classes (see getInternalName). May be null.
Returns: the printer/**
     * Class method.
     * See {@link jdk.internal.org.objectweb.asm.ClassVisitor#visitMethod}.
     *
     * @param access
     *            the method's access flags (see {@link Opcodes}). This
     *            parameter also indicates if the method is synthetic and/or
     *            deprecated.
     * @param name
     *            the method's name.
     * @param desc
     *            the method's descriptor (see {@link jdk.internal.org.objectweb.asm.Type Type}).
     * @param signature
     *            the method's signature. May be <tt>null</tt> if the method
     *            parameters, return type and exceptions do not use generic
     *            types.
     * @param exceptions
     *            the internal names of the method's exception classes (see
     *            {@link jdk.internal.org.objectweb.asm.Type#getInternalName() getInternalName}). May be
     *            <tt>null</tt>.
     * @return the printer
     */
    public abstract Printer visitMethod(final int access, final String name,
            final String desc, final String signature, final String[] exceptions);

    Class end. See ClassVisitor.visitEnd. /**
     * Class end. See {@link jdk.internal.org.objectweb.asm.ClassVisitor#visitEnd}.
     */
    public abstract void visitClassEnd();

    // ------------------------------------------------------------------------
    // Annotations
    // ------------------------------------------------------------------------

    Annotation value. See AnnotationVisitor.visit. 
Params: name – 
           the value name.
value –  the actual value, whose type must be Byte, Boolean, Character, Short, Integer , Long, Float, Double, String or Type or OBJECT or ARRAY sort. This value can also be an array of byte, boolean, short, char, int, long, float or double values (this is equivalent to using visitArray and visiting each array element in turn, but is more convenient)./**
     * Annotation value.
     * See {@link jdk.internal.org.objectweb.asm.AnnotationVisitor#visit}.
     *
     * @param name
     *            the value name.
     * @param value
     *            the actual value, whose type must be {@link Byte},
     *            {@link Boolean}, {@link Character}, {@link Short},
     *            {@link Integer} , {@link Long}, {@link Float}, {@link Double},
     *            {@link String} or {@link jdk.internal.org.objectweb.asm.Type}
     *            or OBJECT or ARRAY sort.
     *            This value can also be an array of byte, boolean, short, char, int,
     *            long, float or double values (this is equivalent to using
     *            {@link #visitArray visitArray} and visiting each array element
     *            in turn, but is more convenient).
     */
    public abstract void visit(final String name, final Object value);

    Annotation enum value. See AnnotationVisitor.visitEnum. Visits an enumeration value of the annotation. 
Params: name – 
           the value name.
desc – 
           the class descriptor of the enumeration class.
value – 
           the actual enumeration value./**
     * Annotation enum value.
     * See {@link jdk.internal.org.objectweb.asm.AnnotationVisitor#visitEnum}.
     *
     * Visits an enumeration value of the annotation.
     *
     * @param name
     *            the value name.
     * @param desc
     *            the class descriptor of the enumeration class.
     * @param value
     *            the actual enumeration value.
     */
    public abstract void visitEnum(final String name, final String desc,
            final String value);

    Nested annotation value. See AnnotationVisitor.visitAnnotation. 
Params: name – 
           the value name.
desc – 
           the class descriptor of the nested annotation class.
Returns: the printer/**
     * Nested annotation value.
     * See {@link jdk.internal.org.objectweb.asm.AnnotationVisitor#visitAnnotation}.
     *
     * @param name
     *            the value name.
     * @param desc
     *            the class descriptor of the nested annotation class.
     * @return the printer
     */
    public abstract Printer visitAnnotation(final String name, final String desc);

    Annotation array value. See AnnotationVisitor.visitArray. Visits an array value of the annotation. Note that arrays of primitive types (such as byte, boolean, short, char, int, long, float or double) can be passed as value to visit. This is what ClassReader does. 
Params: name – 
           the value name.
Returns: the printer/**
     * Annotation array value.
     * See {@link jdk.internal.org.objectweb.asm.AnnotationVisitor#visitArray}.
     *
     * Visits an array value of the annotation. Note that arrays of primitive
     * types (such as byte, boolean, short, char, int, long, float or double)
     * can be passed as value to {@link #visit visit}. This is what
     * {@link jdk.internal.org.objectweb.asm.ClassReader} does.
     *
     * @param name
     *            the value name.
     * @return the printer
     */
    public abstract Printer visitArray(final String name);

    Annotation end. See AnnotationVisitor.visitEnd. /**
     * Annotation end. See {@link jdk.internal.org.objectweb.asm.AnnotationVisitor#visitEnd}.
     */
    public abstract void visitAnnotationEnd();

    // ------------------------------------------------------------------------
    // Fields
    // ------------------------------------------------------------------------

    Field annotation. See FieldVisitor.visitAnnotation. 
Params: desc – 
           the class descriptor of the annotation class.
visible – 
           true if the annotation is visible at runtime.
Returns: the printer/**
     * Field annotation.
     * See {@link jdk.internal.org.objectweb.asm.FieldVisitor#visitAnnotation}.
     *
     * @param desc
     *            the class descriptor of the annotation class.
     * @param visible
     *            <tt>true</tt> if the annotation is visible at runtime.
     * @return the printer
     */
    public abstract Printer visitFieldAnnotation(final String desc,
            final boolean visible);

    Field type annotation. See FieldVisitor.visitTypeAnnotation. 
Params: typeRef –  a reference to the annotated type. The sort of this type reference must be FIELD. See TypeReference.
typePath – 
           the path to the annotated type argument, wildcard bound, array
           element type, or static inner type within 'typeRef'. May be
           null if the annotation targets 'typeRef' as a whole.
desc – 
           the class descriptor of the annotation class.
visible – 
           true if the annotation is visible at runtime.
Returns: the printer/**
     * Field type annotation.
     * See {@link jdk.internal.org.objectweb.asm.FieldVisitor#visitTypeAnnotation}.
     *
     * @param typeRef
     *            a reference to the annotated type. The sort of this type
     *            reference must be {@link jdk.internal.org.objectweb.asm.TypeReference#FIELD FIELD}.
     *            See {@link jdk.internal.org.objectweb.asm.TypeReference}.
     * @param typePath
     *            the path to the annotated type argument, wildcard bound, array
     *            element type, or static inner type within 'typeRef'. May be
     *            <tt>null</tt> if the annotation targets 'typeRef' as a whole.
     * @param desc
     *            the class descriptor of the annotation class.
     * @param visible
     *            <tt>true</tt> if the annotation is visible at runtime.
     * @return the printer
     */
    public Printer visitFieldTypeAnnotation(final int typeRef,
            final TypePath typePath, final String desc, final boolean visible) {
        throw new RuntimeException("Must be overriden");
    }

    Field attribute. See FieldVisitor.visitAttribute. 
Params: attr – 
           an attribute./**
     * Field attribute.
     * See {@link jdk.internal.org.objectweb.asm.FieldVisitor#visitAttribute}.
     *
     * @param attr
     *            an attribute.
     */
    public abstract void visitFieldAttribute(final Attribute attr);

    Field end. See FieldVisitor.visitEnd. /**
     * Field end.
     * See {@link jdk.internal.org.objectweb.asm.FieldVisitor#visitEnd}.
     */
    public abstract void visitFieldEnd();

    // ------------------------------------------------------------------------
    // Methods
    // ------------------------------------------------------------------------

    Method parameter. See MethodVisitor.visitParameter(String, int). 
Params: name – 
           parameter name or null if none is provided.
access – 
           the parameter's access flags, only ACC_FINAL,
           ACC_SYNTHETIC or/and ACC_MANDATED are allowed (see Opcodes)./**
     * Method parameter.
     * See {@link jdk.internal.org.objectweb.asm.MethodVisitor#visitParameter(String, int)}.
     *
     * @param name
     *            parameter name or null if none is provided.
     * @param access
     *            the parameter's access flags, only <tt>ACC_FINAL</tt>,
     *            <tt>ACC_SYNTHETIC</tt> or/and <tt>ACC_MANDATED</tt> are
     *            allowed (see {@link Opcodes}).
     */
    public void visitParameter(String name, int access) {
        throw new RuntimeException("Must be overriden");
    }

    Method default annotation. See MethodVisitor.visitAnnotationDefault. 
Returns: the printer/**
     * Method default annotation.
     * See {@link jdk.internal.org.objectweb.asm.MethodVisitor#visitAnnotationDefault}.
     *
     * @return the printer
     */
    public abstract Printer visitAnnotationDefault();

    Method annotation. See MethodVisitor.visitAnnotation. 
Params: desc – 
           the class descriptor of the annotation class.
visible – 
           true if the annotation is visible at runtime.
Returns: the printer/**
     * Method annotation.
     * See {@link jdk.internal.org.objectweb.asm.MethodVisitor#visitAnnotation}.
     *
     * @param desc
     *            the class descriptor of the annotation class.
     * @param visible
     *            <tt>true</tt> if the annotation is visible at runtime.
     * @return the printer
     */
    public abstract Printer visitMethodAnnotation(final String desc,
            final boolean visible);

    Method type annotation. See MethodVisitor.visitTypeAnnotation. 
Params: typeRef –  a reference to the annotated type. The sort of this type reference must be FIELD. See TypeReference.
typePath – 
           the path to the annotated type argument, wildcard bound, array
           element type, or static inner type within 'typeRef'. May be
           null if the annotation targets 'typeRef' as a whole.
desc – 
           the class descriptor of the annotation class.
visible – 
           true if the annotation is visible at runtime.
Returns: the printer/**
     * Method type annotation.
     * See {@link jdk.internal.org.objectweb.asm.MethodVisitor#visitTypeAnnotation}.
     *
     * @param typeRef
     *            a reference to the annotated type. The sort of this type
     *            reference must be {@link jdk.internal.org.objectweb.asm.TypeReference#FIELD FIELD}.
     *            See {@link jdk.internal.org.objectweb.asm.TypeReference}.
     * @param typePath
     *            the path to the annotated type argument, wildcard bound, array
     *            element type, or static inner type within 'typeRef'. May be
     *            <tt>null</tt> if the annotation targets 'typeRef' as a whole.
     * @param desc
     *            the class descriptor of the annotation class.
     * @param visible
     *            <tt>true</tt> if the annotation is visible at runtime.
     * @return the printer
     */
    public Printer visitMethodTypeAnnotation(final int typeRef,
            final TypePath typePath, final String desc, final boolean visible) {
        throw new RuntimeException("Must be overriden");
    }

    Method parameter annotation. See MethodVisitor.visitParameterAnnotation. 
Params: parameter – 
           the parameter index.
desc – 
           the class descriptor of the annotation class.
visible – 
           true if the annotation is visible at runtime.
Returns: the printer/**
     * Method parameter annotation.
     * See {@link jdk.internal.org.objectweb.asm.MethodVisitor#visitParameterAnnotation}.
     *
     * @param parameter
     *            the parameter index.
     * @param desc
     *            the class descriptor of the annotation class.
     * @param visible
     *            <tt>true</tt> if the annotation is visible at runtime.
     * @return the printer
     */
    public abstract Printer visitParameterAnnotation(final int parameter,
            final String desc, final boolean visible);

    Method attribute. See MethodVisitor.visitAttribute. 
Params: attr – 
           an attribute./**
     * Method attribute.
     * See {@link jdk.internal.org.objectweb.asm.MethodVisitor#visitAttribute}.
     *
     * @param attr
     *            an attribute.
     */
    public abstract void visitMethodAttribute(final Attribute attr);

    Method start. See MethodVisitor.visitCode. /**
     * Method start.
     * See {@link jdk.internal.org.objectweb.asm.MethodVisitor#visitCode}.
     */
    public abstract void visitCode();

    Method stack frame. See MethodVisitor.visitFrame. Visits the current state of the local variables and operand stack elements. This method must(*) be called just before any
instruction i that follows an unconditional branch instruction
such as GOTO or THROW, that is the target of a jump instruction, or that
starts an exception handler block. The visited types must describe the
values of the local variables and of the operand stack elements just
before i is executed.


 (*) this is mandatory only for classes whose version is greater than or equal to V1_6. 



The frames of a method must be given either in expanded form, or in
compressed form (all frames must use the same format, i.e. you must not
mix expanded and compressed frames within a single method):

In expanded form, all frames must have the F_NEW type.
In compressed form, frames are basically "deltas" from the state of
the previous frame:

Opcodes.F_SAME representing frame with exactly the same locals as the previous frame and with the empty stack.
Opcodes.F_SAME1 representing frame with exactly the same locals as the previous frame and with single value on the stack ( nStack is 1 and stack[0] contains value for the
type of the stack item).
Opcodes.F_APPEND representing frame with current locals are the same as the locals in the previous frame, except that additional locals are defined (nLocal is 1, 2 or 3 and
local elements contains values representing added types).
Opcodes.F_CHOP representing frame with current locals are the same as the locals in the previous frame, except that the last 1-3 locals are absent and with the empty stack (nLocals is 1, 2 or 3).
Opcodes.F_FULL representing complete frame data.





In both cases the first frame, corresponding to the method's parameters
and access flags, is implicit and must not be visited. Also, it is
illegal to visit two or more frames for the same code location (i.e., at
least one instruction must be visited between two calls to visitFrame).
Params: type –  the type of this stack map frame. Must be Opcodes.F_NEW for expanded frames, or Opcodes.F_FULL, Opcodes.F_APPEND, Opcodes.F_CHOP, Opcodes.F_SAME or Opcodes.F_APPEND, Opcodes.F_SAME1 for compressed frames.
nLocal – 
           the number of local variables in the visited frame.
local –  the local variable types in this frame. This array must not be modified. Primitive types are represented by Opcodes.TOP, Opcodes.INTEGER, Opcodes.FLOAT, Opcodes.LONG, Opcodes.DOUBLE,Opcodes.NULL or Opcodes.UNINITIALIZED_THIS (long and double are represented by a single element). Reference types are represented by String objects (representing internal names), and uninitialized types by Label objects (this label designates the NEW instruction that created this uninitialized value).
nStack – 
           the number of operand stack elements in the visited frame.
stack – 
           the operand stack types in this frame. This array must not be
           modified. Its content has the same format as the "local"
           array.
Throws: IllegalStateException – 
            if a frame is visited just after another one, without any
            instruction between the two (unless this frame is a
            Opcodes#F_SAME frame, in which case it is silently ignored)./**
     * Method stack frame.
     * See {@link jdk.internal.org.objectweb.asm.MethodVisitor#visitFrame}.
     *
     * Visits the current state of the local variables and operand stack
     * elements. This method must(*) be called <i>just before</i> any
     * instruction <b>i</b> that follows an unconditional branch instruction
     * such as GOTO or THROW, that is the target of a jump instruction, or that
     * starts an exception handler block. The visited types must describe the
     * values of the local variables and of the operand stack elements <i>just
     * before</i> <b>i</b> is executed.<br>
     * <br>
     * (*) this is mandatory only for classes whose version is greater than or
     * equal to {@link Opcodes#V1_6 V1_6}. <br>
     * <br>
     * The frames of a method must be given either in expanded form, or in
     * compressed form (all frames must use the same format, i.e. you must not
     * mix expanded and compressed frames within a single method):
     * <ul>
     * <li>In expanded form, all frames must have the F_NEW type.</li>
     * <li>In compressed form, frames are basically "deltas" from the state of
     * the previous frame:
     * <ul>
     * <li>{@link Opcodes#F_SAME} representing frame with exactly the same
     * locals as the previous frame and with the empty stack.</li>
     * <li>{@link Opcodes#F_SAME1} representing frame with exactly the same
     * locals as the previous frame and with single value on the stack (
     * <code>nStack</code> is 1 and <code>stack[0]</code> contains value for the
     * type of the stack item).</li>
     * <li>{@link Opcodes#F_APPEND} representing frame with current locals are
     * the same as the locals in the previous frame, except that additional
     * locals are defined (<code>nLocal</code> is 1, 2 or 3 and
     * <code>local</code> elements contains values representing added types).</li>
     * <li>{@link Opcodes#F_CHOP} representing frame with current locals are the
     * same as the locals in the previous frame, except that the last 1-3 locals
     * are absent and with the empty stack (<code>nLocals</code> is 1, 2 or 3).</li>
     * <li>{@link Opcodes#F_FULL} representing complete frame data.</li>
     * </ul>
     * </li>
     * </ul>
     * <br>
     * In both cases the first frame, corresponding to the method's parameters
     * and access flags, is implicit and must not be visited. Also, it is
     * illegal to visit two or more frames for the same code location (i.e., at
     * least one instruction must be visited between two calls to visitFrame).
     *
     * @param type
     *            the type of this stack map frame. Must be
     *            {@link Opcodes#F_NEW} for expanded frames, or
     *            {@link Opcodes#F_FULL}, {@link Opcodes#F_APPEND},
     *            {@link Opcodes#F_CHOP}, {@link Opcodes#F_SAME} or
     *            {@link Opcodes#F_APPEND}, {@link Opcodes#F_SAME1} for
     *            compressed frames.
     * @param nLocal
     *            the number of local variables in the visited frame.
     * @param local
     *            the local variable types in this frame. This array must not be
     *            modified. Primitive types are represented by
     *            {@link Opcodes#TOP}, {@link Opcodes#INTEGER},
     *            {@link Opcodes#FLOAT}, {@link Opcodes#LONG},
     *            {@link Opcodes#DOUBLE},{@link Opcodes#NULL} or
     *            {@link Opcodes#UNINITIALIZED_THIS} (long and double are
     *            represented by a single element). Reference types are
     *            represented by String objects (representing internal names),
     *            and uninitialized types by Label objects (this label
     *            designates the NEW instruction that created this uninitialized
     *            value).
     * @param nStack
     *            the number of operand stack elements in the visited frame.
     * @param stack
     *            the operand stack types in this frame. This array must not be
     *            modified. Its content has the same format as the "local"
     *            array.
     * @throws IllegalStateException
     *             if a frame is visited just after another one, without any
     *             instruction between the two (unless this frame is a
     *             Opcodes#F_SAME frame, in which case it is silently ignored).
     */
    public abstract void visitFrame(final int type, final int nLocal,
            final Object[] local, final int nStack, final Object[] stack);

    Method instruction. See MethodVisitor.visitInsn 
Params: opcode – 
           the opcode of the instruction to be visited. This opcode is
           either NOP, ACONST_NULL, ICONST_M1, ICONST_0, ICONST_1,
           ICONST_2, ICONST_3, ICONST_4, ICONST_5, LCONST_0, LCONST_1,
           FCONST_0, FCONST_1, FCONST_2, DCONST_0, DCONST_1, IALOAD,
           LALOAD, FALOAD, DALOAD, AALOAD, BALOAD, CALOAD, SALOAD,
           IASTORE, LASTORE, FASTORE, DASTORE, AASTORE, BASTORE, CASTORE,
           SASTORE, POP, POP2, DUP, DUP_X1, DUP_X2, DUP2, DUP2_X1,
           DUP2_X2, SWAP, IADD, LADD, FADD, DADD, ISUB, LSUB, FSUB, DSUB,
           IMUL, LMUL, FMUL, DMUL, IDIV, LDIV, FDIV, DDIV, IREM, LREM,
           FREM, DREM, INEG, LNEG, FNEG, DNEG, ISHL, LSHL, ISHR, LSHR,
           IUSHR, LUSHR, IAND, LAND, IOR, LOR, IXOR, LXOR, I2L, I2F, I2D,
           L2I, L2F, L2D, F2I, F2L, F2D, D2I, D2L, D2F, I2B, I2C, I2S,
           LCMP, FCMPL, FCMPG, DCMPL, DCMPG, IRETURN, LRETURN, FRETURN,
           DRETURN, ARETURN, RETURN, ARRAYLENGTH, ATHROW, MONITORENTER,
           or MONITOREXIT./**
     * Method instruction.
     * See {@link jdk.internal.org.objectweb.asm.MethodVisitor#visitInsn}
     *
     * @param opcode
     *            the opcode of the instruction to be visited. This opcode is
     *            either NOP, ACONST_NULL, ICONST_M1, ICONST_0, ICONST_1,
     *            ICONST_2, ICONST_3, ICONST_4, ICONST_5, LCONST_0, LCONST_1,
     *            FCONST_0, FCONST_1, FCONST_2, DCONST_0, DCONST_1, IALOAD,
     *            LALOAD, FALOAD, DALOAD, AALOAD, BALOAD, CALOAD, SALOAD,
     *            IASTORE, LASTORE, FASTORE, DASTORE, AASTORE, BASTORE, CASTORE,
     *            SASTORE, POP, POP2, DUP, DUP_X1, DUP_X2, DUP2, DUP2_X1,
     *            DUP2_X2, SWAP, IADD, LADD, FADD, DADD, ISUB, LSUB, FSUB, DSUB,
     *            IMUL, LMUL, FMUL, DMUL, IDIV, LDIV, FDIV, DDIV, IREM, LREM,
     *            FREM, DREM, INEG, LNEG, FNEG, DNEG, ISHL, LSHL, ISHR, LSHR,
     *            IUSHR, LUSHR, IAND, LAND, IOR, LOR, IXOR, LXOR, I2L, I2F, I2D,
     *            L2I, L2F, L2D, F2I, F2L, F2D, D2I, D2L, D2F, I2B, I2C, I2S,
     *            LCMP, FCMPL, FCMPG, DCMPL, DCMPG, IRETURN, LRETURN, FRETURN,
     *            DRETURN, ARETURN, RETURN, ARRAYLENGTH, ATHROW, MONITORENTER,
     *            or MONITOREXIT.
     */
    public abstract void visitInsn(final int opcode);

    Method instruction. See MethodVisitor.visitIntInsn. 
Params: opcode – 
           the opcode of the instruction to be visited. This opcode is
           either BIPUSH, SIPUSH or NEWARRAY.
operand – 
           the operand of the instruction to be visited.

           When opcode is BIPUSH, operand value should be between
           Byte.MIN_VALUE and Byte.MAX_VALUE.

           When opcode is SIPUSH, operand value should be between
           Short.MIN_VALUE and Short.MAX_VALUE.
 When opcode is NEWARRAY, operand value should be one of Opcodes.T_BOOLEAN, Opcodes.T_CHAR, Opcodes.T_FLOAT, Opcodes.T_DOUBLE, Opcodes.T_BYTE, Opcodes.T_SHORT, Opcodes.T_INT or Opcodes.T_LONG./**
     * Method instruction.
     * See {@link jdk.internal.org.objectweb.asm.MethodVisitor#visitIntInsn}.
     *
     * @param opcode
     *            the opcode of the instruction to be visited. This opcode is
     *            either BIPUSH, SIPUSH or NEWARRAY.
     * @param operand
     *            the operand of the instruction to be visited.<br>
     *            When opcode is BIPUSH, operand value should be between
     *            Byte.MIN_VALUE and Byte.MAX_VALUE.<br>
     *            When opcode is SIPUSH, operand value should be between
     *            Short.MIN_VALUE and Short.MAX_VALUE.<br>
     *            When opcode is NEWARRAY, operand value should be one of
     *            {@link Opcodes#T_BOOLEAN}, {@link Opcodes#T_CHAR},
     *            {@link Opcodes#T_FLOAT}, {@link Opcodes#T_DOUBLE},
     *            {@link Opcodes#T_BYTE}, {@link Opcodes#T_SHORT},
     *            {@link Opcodes#T_INT} or {@link Opcodes#T_LONG}.
     */
    public abstract void visitIntInsn(final int opcode, final int operand);

    Method instruction. See MethodVisitor.visitVarInsn. 
Params: opcode – 
           the opcode of the local variable instruction to be visited.
           This opcode is either ILOAD, LLOAD, FLOAD, DLOAD, ALOAD,
           ISTORE, LSTORE, FSTORE, DSTORE, ASTORE or RET.
var – 
           the operand of the instruction to be visited. This operand is
           the index of a local variable./**
     * Method instruction.
     * See {@link jdk.internal.org.objectweb.asm.MethodVisitor#visitVarInsn}.
     *
     * @param opcode
     *            the opcode of the local variable instruction to be visited.
     *            This opcode is either ILOAD, LLOAD, FLOAD, DLOAD, ALOAD,
     *            ISTORE, LSTORE, FSTORE, DSTORE, ASTORE or RET.
     * @param var
     *            the operand of the instruction to be visited. This operand is
     *            the index of a local variable.
     */
    public abstract void visitVarInsn(final int opcode, final int var);

    Method instruction. See MethodVisitor.visitTypeInsn. /** Visits a type instruction. A type instruction is an instruction that takes the internal name of a class as parameter. 
Params: opcode – 
           the opcode of the type instruction to be visited. This opcode
           is either NEW, ANEWARRAY, CHECKCAST or INSTANCEOF.
type –  the operand of the instruction to be visited. This operand must be the internal name of an object or array class (see getInternalName)./**
     * Method instruction.
     * See {@link jdk.internal.org.objectweb.asm.MethodVisitor#visitTypeInsn}.
     *
    /**
     * Visits a type instruction. A type instruction is an instruction that
     * takes the internal name of a class as parameter.
     *
     * @param opcode
     *            the opcode of the type instruction to be visited. This opcode
     *            is either NEW, ANEWARRAY, CHECKCAST or INSTANCEOF.
     * @param type
     *            the operand of the instruction to be visited. This operand
     *            must be the internal name of an object or array class (see
     *            {@link jdk.internal.org.objectweb.asm.Type#getInternalName() getInternalName}).
     */
    public abstract void visitTypeInsn(final int opcode, final String type);

    Method instruction. See MethodVisitor.visitFieldInsn. 
Params: opcode – 
           the opcode of the type instruction to be visited. This opcode
           is either GETSTATIC, PUTSTATIC, GETFIELD or PUTFIELD.
owner –  the internal name of the field's owner class (see getInternalName).
name – 
           the field's name.
desc –  the field's descriptor (see Type)./**
     * Method instruction.
     * See {@link jdk.internal.org.objectweb.asm.MethodVisitor#visitFieldInsn}.
     *
     * @param opcode
     *            the opcode of the type instruction to be visited. This opcode
     *            is either GETSTATIC, PUTSTATIC, GETFIELD or PUTFIELD.
     * @param owner
     *            the internal name of the field's owner class (see
     *            {@link jdk.internal.org.objectweb.asm.Type#getInternalName() getInternalName}).
     * @param name
     *            the field's name.
     * @param desc
     *            the field's descriptor (see {@link jdk.internal.org.objectweb.asm.Type Type}).
     */
    public abstract void visitFieldInsn(final int opcode, final String owner,
            final String name, final String desc);

    Method instruction. See MethodVisitor.visitMethodInsn. 
Params: opcode – 
           the opcode of the type instruction to be visited. This opcode
           is either INVOKEVIRTUAL, INVOKESPECIAL, INVOKESTATIC or
           INVOKEINTERFACE.
owner –  the internal name of the method's owner class (see getInternalName).
name – 
           the method's name.
desc –  the method's descriptor (see Type)./**
     * Method instruction.
     * See {@link jdk.internal.org.objectweb.asm.MethodVisitor#visitMethodInsn}.
     *
     * @param opcode
     *            the opcode of the type instruction to be visited. This opcode
     *            is either INVOKEVIRTUAL, INVOKESPECIAL, INVOKESTATIC or
     *            INVOKEINTERFACE.
     * @param owner
     *            the internal name of the method's owner class (see
     *            {@link jdk.internal.org.objectweb.asm.Type#getInternalName() getInternalName}).
     * @param name
     *            the method's name.
     * @param desc
     *            the method's descriptor (see {@link jdk.internal.org.objectweb.asm.Type Type}).
     */
    @Deprecated
    public void visitMethodInsn(final int opcode, final String owner,
            final String name, final String desc) {
        if (api >= Opcodes.ASM5) {
            boolean itf = opcode == Opcodes.INVOKEINTERFACE;
            visitMethodInsn(opcode, owner, name, desc, itf);
            return;
        }
        throw new RuntimeException("Must be overriden");
    }

    Method instruction. See MethodVisitor.visitMethodInsn. 
Params: opcode – 
           the opcode of the type instruction to be visited. This opcode
           is either INVOKEVIRTUAL, INVOKESPECIAL, INVOKESTATIC or
           INVOKEINTERFACE.
owner –  the internal name of the method's owner class (see getInternalName).
name – 
           the method's name.
desc –  the method's descriptor (see Type).
itf – 
           if the method's owner class is an interface./**
     * Method instruction.
     * See {@link jdk.internal.org.objectweb.asm.MethodVisitor#visitMethodInsn}.
     *
     * @param opcode
     *            the opcode of the type instruction to be visited. This opcode
     *            is either INVOKEVIRTUAL, INVOKESPECIAL, INVOKESTATIC or
     *            INVOKEINTERFACE.
     * @param owner
     *            the internal name of the method's owner class (see
     *            {@link jdk.internal.org.objectweb.asm.Type#getInternalName() getInternalName}).
     * @param name
     *            the method's name.
     * @param desc
     *            the method's descriptor (see {@link jdk.internal.org.objectweb.asm.Type Type}).
     * @param itf
     *            if the method's owner class is an interface.
     */
    public void visitMethodInsn(final int opcode, final String owner,
            final String name, final String desc, final boolean itf) {
        if (api < Opcodes.ASM5) {
            if (itf != (opcode == Opcodes.INVOKEINTERFACE)) {
                throw new IllegalArgumentException(
                        "INVOKESPECIAL/STATIC on interfaces require ASM 5");
            }
            visitMethodInsn(opcode, owner, name, desc);
            return;
        }
        throw new RuntimeException("Must be overriden");
    }

    Method instruction. See MethodVisitor.visitInvokeDynamicInsn. Visits an invokedynamic instruction. 
Params: name – 
           the method's name.
desc –  the method's descriptor (see Type).
bsm – 
           the bootstrap method.
bsmArgs –  the bootstrap method constant arguments. Each argument must be an Integer, Float, Long, Double, String, Type or Handle value. This method is allowed to modify the content of the array so a caller should expect that this array may change./**
     * Method instruction.
     * See {@link jdk.internal.org.objectweb.asm.MethodVisitor#visitInvokeDynamicInsn}.
     *
     * Visits an invokedynamic instruction.
     *
     * @param name
     *            the method's name.
     * @param desc
     *            the method's descriptor (see {@link jdk.internal.org.objectweb.asm.Type Type}).
     * @param bsm
     *            the bootstrap method.
     * @param bsmArgs
     *            the bootstrap method constant arguments. Each argument must be
     *            an {@link Integer}, {@link Float}, {@link Long},
     *            {@link Double}, {@link String}, {@link jdk.internal.org.objectweb.asm.Type} or {@link Handle}
     *            value. This method is allowed to modify the content of the
     *            array so a caller should expect that this array may change.
     */
    public abstract void visitInvokeDynamicInsn(String name, String desc,
            Handle bsm, Object... bsmArgs);

    Method jump instruction. See MethodVisitor.visitJumpInsn. 
Params: opcode – 
           the opcode of the type instruction to be visited. This opcode
           is either IFEQ, IFNE, IFLT, IFGE, IFGT, IFLE, IF_ICMPEQ,
           IF_ICMPNE, IF_ICMPLT, IF_ICMPGE, IF_ICMPGT, IF_ICMPLE,
           IF_ACMPEQ, IF_ACMPNE, GOTO, JSR, IFNULL or IFNONNULL.
label – 
           the operand of the instruction to be visited. This operand is
           a label that designates the instruction to which the jump
           instruction may jump./**
     * Method jump instruction.
     * See {@link jdk.internal.org.objectweb.asm.MethodVisitor#visitJumpInsn}.
     *
     * @param opcode
     *            the opcode of the type instruction to be visited. This opcode
     *            is either IFEQ, IFNE, IFLT, IFGE, IFGT, IFLE, IF_ICMPEQ,
     *            IF_ICMPNE, IF_ICMPLT, IF_ICMPGE, IF_ICMPGT, IF_ICMPLE,
     *            IF_ACMPEQ, IF_ACMPNE, GOTO, JSR, IFNULL or IFNONNULL.
     * @param label
     *            the operand of the instruction to be visited. This operand is
     *            a label that designates the instruction to which the jump
     *            instruction may jump.
     */
    public abstract void visitJumpInsn(final int opcode, final Label label);

    Method label. See MethodVisitor.visitLabel. 
Params: label –  a Label object./**
     * Method label.
     * See {@link jdk.internal.org.objectweb.asm.MethodVisitor#visitLabel}.
     *
     * @param label
     *            a {@link Label Label} object.
     */
    public abstract void visitLabel(final Label label);

    Method instruction. See MethodVisitor.visitLdcInsn. Visits a LDC instruction. Note that new constant types may be added in future versions of the Java Virtual Machine. To easily detect new constant types, implementations of this method should check for unexpected constant types, like this: if (cst instanceof Integer) {
    // ...
} else if (cst instanceof Float) {
    // ...
} else if (cst instanceof Long) {
    // ...
} else if (cst instanceof Double) {
    // ...
} else if (cst instanceof String) {
    // ...
} else if (cst instanceof Type) {
    int sort = ((Type) cst).getSort();
    if (sort == Type.OBJECT) {
        // ...
    } else if (sort == Type.ARRAY) {
        // ...
    } else if (sort == Type.METHOD) {
        // ...
    } else {
        // throw an exception
    }
} else if (cst instanceof Handle) {
    // ...
} else {
    // throw an exception
}

Params: cst –  the constant to be loaded on the stack. This parameter must be a non null Integer, a Float, a Long, a Double, a String, a Type of OBJECT or ARRAY sort for .class constants, for classes whose version is 49.0, a Type of METHOD sort or a Handle for MethodType and MethodHandle constants, for classes whose version is 51.0./**
     * Method instruction.
     * See {@link jdk.internal.org.objectweb.asm.MethodVisitor#visitLdcInsn}.
     *
     * Visits a LDC instruction. Note that new constant types may be added in
     * future versions of the Java Virtual Machine. To easily detect new
     * constant types, implementations of this method should check for
     * unexpected constant types, like this:
     *
     * <pre>
     * if (cst instanceof Integer) {
     *     // ...
     * } else if (cst instanceof Float) {
     *     // ...
     * } else if (cst instanceof Long) {
     *     // ...
     * } else if (cst instanceof Double) {
     *     // ...
     * } else if (cst instanceof String) {
     *     // ...
     * } else if (cst instanceof Type) {
     *     int sort = ((Type) cst).getSort();
     *     if (sort == Type.OBJECT) {
     *         // ...
     *     } else if (sort == Type.ARRAY) {
     *         // ...
     *     } else if (sort == Type.METHOD) {
     *         // ...
     *     } else {
     *         // throw an exception
     *     }
     * } else if (cst instanceof Handle) {
     *     // ...
     * } else {
     *     // throw an exception
     * }
     * </pre>
     *
     * @param cst
     *            the constant to be loaded on the stack. This parameter must be
     *            a non null {@link Integer}, a {@link Float}, a {@link Long}, a
     *            {@link Double}, a {@link String}, a {@link jdk.internal.org.objectweb.asm.Type}
     *            of OBJECT or ARRAY sort for <tt>.class</tt> constants, for classes whose
     *            version is 49.0, a {@link jdk.internal.org.objectweb.asm.Type} of METHOD sort or a
     *            {@link Handle} for MethodType and MethodHandle constants, for
     *            classes whose version is 51.0.
     */
    public abstract void visitLdcInsn(final Object cst);

    Method instruction. See MethodVisitor.visitIincInsn. 
Params: var – 
           index of the local variable to be incremented.
increment – 
           amount to increment the local variable by./**
     * Method instruction.
     * See {@link jdk.internal.org.objectweb.asm.MethodVisitor#visitIincInsn}.
     *
     * @param var
     *            index of the local variable to be incremented.
     * @param increment
     *            amount to increment the local variable by.
     */
    public abstract void visitIincInsn(final int var, final int increment);

    Method instruction. See MethodVisitor.visitTableSwitchInsn. 
Params: min – 
           the minimum key value.
max – 
           the maximum key value.
dflt – 
           beginning of the default handler block.
labels – 
           beginnings of the handler blocks. labels[i] is the
           beginning of the handler block for the min + i key./**
     * Method instruction.
     * See {@link jdk.internal.org.objectweb.asm.MethodVisitor#visitTableSwitchInsn}.
     *
     * @param min
     *            the minimum key value.
     * @param max
     *            the maximum key value.
     * @param dflt
     *            beginning of the default handler block.
     * @param labels
     *            beginnings of the handler blocks. <tt>labels[i]</tt> is the
     *            beginning of the handler block for the <tt>min + i</tt> key.
     */
    public abstract void visitTableSwitchInsn(final int min, final int max,
            final Label dflt, final Label... labels);

    Method instruction. See MethodVisitor.visitLookupSwitchInsn. 
Params: dflt – 
           beginning of the default handler block.
keys – 
           the values of the keys.
labels – 
           beginnings of the handler blocks. labels[i] is the
           beginning of the handler block for the keys[i] key./**
     * Method instruction.
     * See {@link jdk.internal.org.objectweb.asm.MethodVisitor#visitLookupSwitchInsn}.
     *
     * @param dflt
     *            beginning of the default handler block.
     * @param keys
     *            the values of the keys.
     * @param labels
     *            beginnings of the handler blocks. <tt>labels[i]</tt> is the
     *            beginning of the handler block for the <tt>keys[i]</tt> key.
     */
    public abstract void visitLookupSwitchInsn(final Label dflt,
            final int[] keys, final Label[] labels);

    Method instruction. See MethodVisitor.visitMultiANewArrayInsn. 
Params: desc –  an array type descriptor (see Type).
dims – 
           number of dimensions of the array to allocate./**
     * Method instruction.
     * See {@link jdk.internal.org.objectweb.asm.MethodVisitor#visitMultiANewArrayInsn}.
     *
     * @param desc
     *            an array type descriptor (see {@link jdk.internal.org.objectweb.asm.Type Type}).
     * @param dims
     *            number of dimensions of the array to allocate.
     */
    public abstract void visitMultiANewArrayInsn(final String desc,
            final int dims);

    Instruction type annotation. See MethodVisitor.visitInsnAnnotation. 
Params: typeRef –  a reference to the annotated type. The sort of this type reference must be INSTANCEOF, NEW, CONSTRUCTOR_REFERENCE, METHOD_REFERENCE, CAST, CONSTRUCTOR_INVOCATION_TYPE_ARGUMENT, METHOD_INVOCATION_TYPE_ARGUMENT, CONSTRUCTOR_REFERENCE_TYPE_ARGUMENT, or METHOD_REFERENCE_TYPE_ARGUMENT. See TypeReference.
typePath – 
           the path to the annotated type argument, wildcard bound, array
           element type, or static inner type within 'typeRef'. May be
           null if the annotation targets 'typeRef' as a whole.
desc – 
           the class descriptor of the annotation class.
visible – 
           true if the annotation is visible at runtime.
Returns: the printer/**
     * Instruction type annotation.
     * See {@link jdk.internal.org.objectweb.asm.MethodVisitor#visitInsnAnnotation}.
     *
     * @param typeRef
     *            a reference to the annotated type. The sort of this type
     *            reference must be {@link jdk.internal.org.objectweb.asm.TypeReference#INSTANCEOF INSTANCEOF},
     *            {@link jdk.internal.org.objectweb.asm.TypeReference#NEW NEW},
     *            {@link jdk.internal.org.objectweb.asm.TypeReference#CONSTRUCTOR_REFERENCE CONSTRUCTOR_REFERENCE},
     *            {@link jdk.internal.org.objectweb.asm.TypeReference#METHOD_REFERENCE METHOD_REFERENCE},
     *            {@link jdk.internal.org.objectweb.asm.TypeReference#CAST CAST},
     *            {@link jdk.internal.org.objectweb.asm.TypeReference#CONSTRUCTOR_INVOCATION_TYPE_ARGUMENT CONSTRUCTOR_INVOCATION_TYPE_ARGUMENT},
     *            {@link jdk.internal.org.objectweb.asm.TypeReference#METHOD_INVOCATION_TYPE_ARGUMENT METHOD_INVOCATION_TYPE_ARGUMENT},
     *            {@link jdk.internal.org.objectweb.asm.TypeReference#CONSTRUCTOR_REFERENCE_TYPE_ARGUMENT CONSTRUCTOR_REFERENCE_TYPE_ARGUMENT},
     *            or {@link jdk.internal.org.objectweb.asm.TypeReference#METHOD_REFERENCE_TYPE_ARGUMENT METHOD_REFERENCE_TYPE_ARGUMENT}.
     *            See {@link jdk.internal.org.objectweb.asm.TypeReference}.
     * @param typePath
     *            the path to the annotated type argument, wildcard bound, array
     *            element type, or static inner type within 'typeRef'. May be
     *            <tt>null</tt> if the annotation targets 'typeRef' as a whole.
     * @param desc
     *            the class descriptor of the annotation class.
     * @param visible
     *            <tt>true</tt> if the annotation is visible at runtime.
     * @return the printer
     */
    public Printer visitInsnAnnotation(final int typeRef,
            final TypePath typePath, final String desc, final boolean visible) {
        throw new RuntimeException("Must be overriden");
    }

    Method exception handler. See MethodVisitor.visitTryCatchBlock. 
Params: start – 
           beginning of the exception handler's scope (inclusive).
end – 
           end of the exception handler's scope (exclusive).
handler – 
           beginning of the exception handler's code.
type – 
           internal name of the type of exceptions handled by the
           handler, or null to catch any exceptions (for
           "finally" blocks).
Throws: IllegalArgumentException –  if one of the labels has already been visited by this visitor (by the visitLabel method)./**
     * Method exception handler.
     * See {@link jdk.internal.org.objectweb.asm.MethodVisitor#visitTryCatchBlock}.
     *
     * @param start
     *            beginning of the exception handler's scope (inclusive).
     * @param end
     *            end of the exception handler's scope (exclusive).
     * @param handler
     *            beginning of the exception handler's code.
     * @param type
     *            internal name of the type of exceptions handled by the
     *            handler, or <tt>null</tt> to catch any exceptions (for
     *            "finally" blocks).
     * @throws IllegalArgumentException
     *             if one of the labels has already been visited by this visitor
     *             (by the {@link #visitLabel visitLabel} method).
     */
    public abstract void visitTryCatchBlock(final Label start, final Label end,
            final Label handler, final String type);

    Try catch block type annotation. See MethodVisitor.visitTryCatchAnnotation. 
Params: typeRef –  a reference to the annotated type. The sort of this type reference must be 
           EXCEPTION_PARAMETER. See TypeReference.
typePath – 
           the path to the annotated type argument, wildcard bound, array
           element type, or static inner type within 'typeRef'. May be
           null if the annotation targets 'typeRef' as a whole.
desc – 
           the class descriptor of the annotation class.
visible – 
           true if the annotation is visible at runtime.
Returns: the printer/**
     * Try catch block type annotation.
     * See {@link jdk.internal.org.objectweb.asm.MethodVisitor#visitTryCatchAnnotation}.
     *
     * @param typeRef
     *            a reference to the annotated type. The sort of this type
     *            reference must be {@link jdk.internal.org.objectweb.asm.TypeReference#EXCEPTION_PARAMETER
     *            EXCEPTION_PARAMETER}.
     *            See {@link jdk.internal.org.objectweb.asm.TypeReference}.
     * @param typePath
     *            the path to the annotated type argument, wildcard bound, array
     *            element type, or static inner type within 'typeRef'. May be
     *            <tt>null</tt> if the annotation targets 'typeRef' as a whole.
     * @param desc
     *            the class descriptor of the annotation class.
     * @param visible
     *            <tt>true</tt> if the annotation is visible at runtime.
     * @return the printer
     */
    public Printer visitTryCatchAnnotation(final int typeRef,
            final TypePath typePath, final String desc, final boolean visible) {
        throw new RuntimeException("Must be overriden");
    }

    Method debug info. See MethodVisitor.visitLocalVariable. 
Params: name – 
           the name of a local variable.
desc – 
           the type descriptor of this local variable.
signature – 
           the type signature of this local variable. May be
           null if the local variable type does not use generic
           types.
start – 
           the first instruction corresponding to the scope of this local
           variable (inclusive).
end – 
           the last instruction corresponding to the scope of this local
           variable (exclusive).
index – 
           the local variable's index.
Throws: IllegalArgumentException –  if one of the labels has not already been visited by this visitor (by the visitLabel method)./**
     * Method debug info.
     * See {@link jdk.internal.org.objectweb.asm.MethodVisitor#visitLocalVariable}.
     *
     * @param name
     *            the name of a local variable.
     * @param desc
     *            the type descriptor of this local variable.
     * @param signature
     *            the type signature of this local variable. May be
     *            <tt>null</tt> if the local variable type does not use generic
     *            types.
     * @param start
     *            the first instruction corresponding to the scope of this local
     *            variable (inclusive).
     * @param end
     *            the last instruction corresponding to the scope of this local
     *            variable (exclusive).
     * @param index
     *            the local variable's index.
     * @throws IllegalArgumentException
     *             if one of the labels has not already been visited by this
     *             visitor (by the {@link #visitLabel visitLabel} method).
     */
    public abstract void visitLocalVariable(final String name,
            final String desc, final String signature, final Label start,
            final Label end, final int index);

    Local variable type annotation. See MethodVisitor.visitTryCatchAnnotation. 
Params: typeRef –  a reference to the annotated type. The sort of this type reference must be 
           LOCAL_VARIABLE or 
           RESOURCE_VARIABLE. See TypeReference.
typePath – 
           the path to the annotated type argument, wildcard bound, array
           element type, or static inner type within 'typeRef'. May be
           null if the annotation targets 'typeRef' as a whole.
start – 
           the fist instructions corresponding to the continuous ranges
           that make the scope of this local variable (inclusive).
end – 
           the last instructions corresponding to the continuous ranges
           that make the scope of this local variable (exclusive). This
           array must have the same size as the 'start' array.
index – 
           the local variable's index in each range. This array must have
           the same size as the 'start' array.
desc – 
           the class descriptor of the annotation class.
visible – 
           true if the annotation is visible at runtime.
Returns: the printer/**
     * Local variable type annotation.
     * See {@link jdk.internal.org.objectweb.asm.MethodVisitor#visitTryCatchAnnotation}.
     *
     * @param typeRef
     *            a reference to the annotated type. The sort of this type
     *            reference must be {@link jdk.internal.org.objectweb.asm.TypeReference#LOCAL_VARIABLE
     *            LOCAL_VARIABLE} or {@link jdk.internal.org.objectweb.asm.TypeReference#RESOURCE_VARIABLE
     *            RESOURCE_VARIABLE}.
     *            See {@link jdk.internal.org.objectweb.asm.TypeReference}.
     * @param typePath
     *            the path to the annotated type argument, wildcard bound, array
     *            element type, or static inner type within 'typeRef'. May be
     *            <tt>null</tt> if the annotation targets 'typeRef' as a whole.
     * @param start
     *            the fist instructions corresponding to the continuous ranges
     *            that make the scope of this local variable (inclusive).
     * @param end
     *            the last instructions corresponding to the continuous ranges
     *            that make the scope of this local variable (exclusive). This
     *            array must have the same size as the 'start' array.
     * @param index
     *            the local variable's index in each range. This array must have
     *            the same size as the 'start' array.
     * @param desc
     *            the class descriptor of the annotation class.
     * @param visible
     *            <tt>true</tt> if the annotation is visible at runtime.
     * @return the printer
     */
    public Printer visitLocalVariableAnnotation(final int typeRef,
            final TypePath typePath, final Label[] start, final Label[] end,
            final int[] index, final String desc, final boolean visible) {
        throw new RuntimeException("Must be overriden");
    }

    Method debug info. See MethodVisitor.visitLineNumber. 
Params: line – 
           a line number. This number refers to the source file from
           which the class was compiled.
start – 
           the first instruction corresponding to this line number.
Throws: IllegalArgumentException – 
            if start has not already been visited by this visitor (by the visitLabel method)./**
     * Method debug info.
     * See {@link jdk.internal.org.objectweb.asm.MethodVisitor#visitLineNumber}.
     *
     * @param line
     *            a line number. This number refers to the source file from
     *            which the class was compiled.
     * @param start
     *            the first instruction corresponding to this line number.
     * @throws IllegalArgumentException
     *             if <tt>start</tt> has not already been visited by this
     *             visitor (by the {@link #visitLabel visitLabel} method).
     */
    public abstract void visitLineNumber(final int line, final Label start);

    Method max stack and max locals. See MethodVisitor.visitMaxs. 
Params: maxStack – 
           maximum stack size of the method.
maxLocals – 
           maximum number of local variables for the method./**
     * Method max stack and max locals.
     * See {@link jdk.internal.org.objectweb.asm.MethodVisitor#visitMaxs}.
     *
     * @param maxStack
     *            maximum stack size of the method.
     * @param maxLocals
     *            maximum number of local variables for the method.
     */
    public abstract void visitMaxs(final int maxStack, final int maxLocals);

    Method end. See MethodVisitor.visitEnd. /**
     * Method end.
     * See {@link jdk.internal.org.objectweb.asm.MethodVisitor#visitEnd}.
     */
    public abstract void visitMethodEnd();

    Returns the text constructed by this visitor.
Returns: the text constructed by this visitor./**
     * Returns the text constructed by this visitor.
     *
     * @return the text constructed by this visitor.
     */
    public List<Object> getText() {
        return text;
    }

    Prints the text constructed by this visitor.
Params: pw – 
           the print writer to be used./**
     * Prints the text constructed by this visitor.
     *
     * @param pw
     *            the print writer to be used.
     */
    public void print(final PrintWriter pw) {
        printList(pw, text);
    }

    Appends a quoted string to a given buffer.
Params: buf – 
           the buffer where the string must be added.
s – 
           the string to be added./**
     * Appends a quoted string to a given buffer.
     *
     * @param buf
     *            the buffer where the string must be added.
     * @param s
     *            the string to be added.
     */
    public static void appendString(final StringBuffer buf, final String s) {
        buf.append('\"');
        for (int i = 0; i < s.length(); ++i) {
            char c = s.charAt(i);
            if (c == '\n') {
                buf.append("\\n");
            } else if (c == '\r') {
                buf.append("\\r");
            } else if (c == '\\') {
                buf.append("\\\\");
            } else if (c == '"') {
                buf.append("\\\"");
            } else if (c < 0x20 || c > 0x7f) {
                buf.append("\\u");
                if (c < 0x10) {
                    buf.append("000");
                } else if (c < 0x100) {
                    buf.append("00");
                } else if (c < 0x1000) {
                    buf.append('0');
                }
                buf.append(Integer.toString(c, 16));
            } else {
                buf.append(c);
            }
        }
        buf.append('\"');
    }

    Prints the given string tree.
Params: pw – 
           the writer to be used to print the tree.
l – 
           a string tree, i.e., a string list that can contain other
           string lists, and so on recursively./**
     * Prints the given string tree.
     *
     * @param pw
     *            the writer to be used to print the tree.
     * @param l
     *            a string tree, i.e., a string list that can contain other
     *            string lists, and so on recursively.
     */
    static void printList(final PrintWriter pw, final List<?> l) {
        for (int i = 0; i < l.size(); ++i) {
            Object o = l.get(i);
            if (o instanceof List) {
                printList(pw, (List<?>) o);
            } else {
                pw.print(o.toString());
            }
        }
    }
}
Params:	desc – the class descriptor of the annotation class. visible – `true` if the annotation is visible at runtime.
Returns:	the printer
Params:	name – the value name. desc – the class descriptor of the nested annotation class.
Returns:	the printer
Params:	parameter – the parameter index. desc – the class descriptor of the annotation class. visible – `true` if the annotation is visible at runtime.
Returns:	the printer
Params:	start – beginning of the exception handler's scope (inclusive). end – end of the exception handler's scope (exclusive). handler – beginning of the exception handler's code. type – internal name of the type of exceptions handled by the handler, or `null` to catch any exceptions (for "finally" blocks).
Throws:	IllegalArgumentException – if one of the labels has already been visited by this visitor (by the `visitLabel` method).
Params:	line – a line number. This number refers to the source file from which the class was compiled. start – the first instruction corresponding to this line number.
Throws:	IllegalArgumentException – if `start` has not already been visited by this visitor (by the `visitLabel` method).
/

java/ 9/ java.base/jdk/internal/org/objectweb/asm/util/Printer.java
