/*
 * 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.FileInputStream;
import java.io.PrintWriter;
import java.util.HashMap;
import java.util.Map;

import jdk.internal.org.objectweb.asm.Attribute;
import jdk.internal.org.objectweb.asm.ClassReader;
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.Type;
import jdk.internal.org.objectweb.asm.TypePath;

A Printer that prints the ASM code to generate the classes if visits.
Author:Eric Bruneton
/** * A {@link Printer} that prints the ASM code to generate the classes if visits. * * @author Eric Bruneton */
public class ASMifier extends Printer {
The name of the visitor variable in the produced code.
/** * The name of the visitor variable in the produced code. */
protected final String name;
Identifier of the annotation visitor variable in the produced code.
/** * Identifier of the annotation visitor variable in the produced code. */
protected final int id;
The label names. This map associates String values to Label keys. It is used only in ASMifierMethodVisitor.
/** * The label names. This map associates String values to Label keys. It is * used only in ASMifierMethodVisitor. */
protected Map<Label, String> labelNames;
Pseudo access flag used to distinguish class access flags.
/** * Pseudo access flag used to distinguish class access flags. */
private static final int ACCESS_CLASS = 262144;
Pseudo access flag used to distinguish field access flags.
/** * Pseudo access flag used to distinguish field access flags. */
private static final int ACCESS_FIELD = 524288;
Pseudo access flag used to distinguish inner class flags.
/** * Pseudo access flag used to distinguish inner class flags. */
private static final int ACCESS_INNER = 1048576;
Pseudo access flag used to distinguish module requires/exports flags.
/** * Pseudo access flag used to distinguish module requires/exports flags. */
private static final int ACCESS_MODULE = 2097152;
Constructs a new ASMifier. Subclasses must not use this constructor. Instead, they must use the ASMifier(int, String, int) version.
Throws:
/** * Constructs a new {@link ASMifier}. <i>Subclasses must not use this * constructor</i>. Instead, they must use the * {@link #ASMifier(int, String, int)} version. * * @throws IllegalStateException * If a subclass calls this constructor. */
public ASMifier() { this(Opcodes.ASM6, "cw", 0); if (getClass() != ASMifier.class) { throw new IllegalStateException(); } }
Constructs a new ASMifier.
Params:
  • api – the ASM API version implemented by this class. Must be one of Opcodes.ASM4, Opcodes.ASM5 or Opcodes.ASM6.
  • name – the name of the visitor variable in the produced code.
  • id – identifier of the annotation visitor variable in the produced code.
/** * Constructs a new {@link ASMifier}. * * @param api * the ASM API version implemented by this class. Must be one of * {@link Opcodes#ASM4}, {@link Opcodes#ASM5} or {@link Opcodes#ASM6}. * @param name * the name of the visitor variable in the produced code. * @param id * identifier of the annotation visitor variable in the produced * code. */
protected ASMifier(final int api, final String name, final int id) { super(api); this.name = name; this.id = id; }
Prints the ASM source code to generate the given class to the standard output.

Usage: ASMifier [-debug] <binary class name or class file name>

Params:
  • args – the command line arguments.
Throws:
  • Exception – if the class cannot be found, or if an IO exception occurs.
/** * Prints the ASM source code to generate the given class to the standard * output. * <p> * Usage: ASMifier [-debug] &lt;binary class name or class file name&gt; * * @param args * the command line arguments. * * @throws Exception * if the class cannot be found, or if an IO exception occurs. */
public static void main(final String[] args) throws Exception { int i = 0; int flags = ClassReader.SKIP_DEBUG; boolean ok = true; if (args.length < 1 || args.length > 2) { ok = false; } if (ok && "-debug".equals(args[0])) { i = 1; flags = 0; if (args.length != 2) { ok = false; } } if (!ok) { System.err .println("Prints the ASM code to generate the given class."); System.err.println("Usage: ASMifier [-debug] " + "<fully qualified class name or class file name>"); return; } ClassReader cr; if (args[i].endsWith(".class") || args[i].indexOf('\\') > -1 || args[i].indexOf('/') > -1) { cr = new ClassReader(new FileInputStream(args[i])); } else { cr = new ClassReader(args[i]); } cr.accept(new TraceClassVisitor(null, new ASMifier(), new PrintWriter( System.out)), flags); } // ------------------------------------------------------------------------ // Classes // ------------------------------------------------------------------------ @Override public void visit(final int version, final int access, final String name, final String signature, final String superName, final String[] interfaces) { String simpleName; if (name == null) { simpleName = "module-info"; } else { int n = name.lastIndexOf('/'); if (n == -1) { simpleName = name; } else { text.add("package asm." + name.substring(0, n).replace('/', '.') + ";\n"); simpleName = name.substring(n + 1).replace('-', '_'); } } text.add("import java.util.*;\n"); text.add("import jdk.internal.org.objectweb.asm.*;\n"); text.add("public class " + simpleName + "Dump implements Opcodes {\n\n"); text.add("public static byte[] dump () throws Exception {\n\n"); text.add("ClassWriter cw = new ClassWriter(0);\n"); text.add("FieldVisitor fv;\n"); text.add("MethodVisitor mv;\n"); text.add("AnnotationVisitor av0;\n\n"); buf.setLength(0); buf.append("cw.visit("); switch (version) { case Opcodes.V1_1: buf.append("V1_1"); break; case Opcodes.V1_2: buf.append("V1_2"); break; case Opcodes.V1_3: buf.append("V1_3"); break; case Opcodes.V1_4: buf.append("V1_4"); break; case Opcodes.V1_5: buf.append("V1_5"); break; case Opcodes.V1_6: buf.append("V1_6"); break; case Opcodes.V1_7: buf.append("V1_7"); break; case Opcodes.V1_8: buf.append("V1_8"); break; case Opcodes.V9: buf.append("V9"); break; default: buf.append(version); break; } buf.append(", "); appendAccess(access | ACCESS_CLASS); buf.append(", "); appendConstant(name); buf.append(", "); appendConstant(signature); buf.append(", "); appendConstant(superName); buf.append(", "); if (interfaces != null && interfaces.length > 0) { buf.append("new String[] {"); for (int i = 0; i < interfaces.length; ++i) { buf.append(i == 0 ? " " : ", "); appendConstant(interfaces[i]); } buf.append(" }"); } else { buf.append("null"); } buf.append(");\n\n"); text.add(buf.toString()); } @Override public void visitSource(final String file, final String debug) { buf.setLength(0); buf.append("cw.visitSource("); appendConstant(file); buf.append(", "); appendConstant(debug); buf.append(");\n\n"); text.add(buf.toString()); } @Override public Printer visitModule(final String name, final int flags, final String version) { buf.setLength(0); buf.append("ModuleVisitor mdv = cw.visitModule("); appendConstant(name); buf.append(", "); appendAccess(flags | ACCESS_MODULE); buf.append(", "); appendConstant(version); buf.append(");\n\n"); text.add(buf.toString()); ASMifier a = createASMifier("mdv", 0); text.add(a.getText()); text.add("}\n"); return a; } @Override public void visitOuterClass(final String owner, final String name, final String desc) { buf.setLength(0); buf.append("cw.visitOuterClass("); appendConstant(owner); buf.append(", "); appendConstant(name); buf.append(", "); appendConstant(desc); buf.append(");\n\n"); text.add(buf.toString()); } @Override public ASMifier visitClassAnnotation(final String desc, final boolean visible) { return visitAnnotation(desc, visible); } @Override public ASMifier visitClassTypeAnnotation(final int typeRef, final TypePath typePath, final String desc, final boolean visible) { return visitTypeAnnotation(typeRef, typePath, desc, visible); } @Override public void visitClassAttribute(final Attribute attr) { visitAttribute(attr); } @Override public void visitInnerClass(final String name, final String outerName, final String innerName, final int access) { buf.setLength(0); buf.append("cw.visitInnerClass("); appendConstant(name); buf.append(", "); appendConstant(outerName); buf.append(", "); appendConstant(innerName); buf.append(", "); appendAccess(access | ACCESS_INNER); buf.append(");\n\n"); text.add(buf.toString()); } @Override public ASMifier visitField(final int access, final String name, final String desc, final String signature, final Object value) { buf.setLength(0); buf.append("{\n"); buf.append("fv = cw.visitField("); appendAccess(access | ACCESS_FIELD); buf.append(", "); appendConstant(name); buf.append(", "); appendConstant(desc); buf.append(", "); appendConstant(signature); buf.append(", "); appendConstant(value); buf.append(");\n"); text.add(buf.toString()); ASMifier a = createASMifier("fv", 0); text.add(a.getText()); text.add("}\n"); return a; } @Override public ASMifier visitMethod(final int access, final String name, final String desc, final String signature, final String[] exceptions) { buf.setLength(0); buf.append("{\n"); buf.append("mv = cw.visitMethod("); appendAccess(access); buf.append(", "); appendConstant(name); buf.append(", "); appendConstant(desc); buf.append(", "); appendConstant(signature); buf.append(", "); if (exceptions != null && exceptions.length > 0) { buf.append("new String[] {"); for (int i = 0; i < exceptions.length; ++i) { buf.append(i == 0 ? " " : ", "); appendConstant(exceptions[i]); } buf.append(" }"); } else { buf.append("null"); } buf.append(");\n"); text.add(buf.toString()); ASMifier a = createASMifier("mv", 0); text.add(a.getText()); text.add("}\n"); return a; } @Override public void visitClassEnd() { text.add("cw.visitEnd();\n\n"); text.add("return cw.toByteArray();\n"); text.add("}\n"); text.add("}\n"); } // ------------------------------------------------------------------------ // Module // ------------------------------------------------------------------------ @Override public void visitMainClass(String mainClass) { buf.setLength(0); buf.append("mdv.visitMainClass("); appendConstant(buf, mainClass); buf.append(");\n"); text.add(buf.toString()); } @Override public void visitPackage(String packaze) { buf.setLength(0); buf.append("mdv.visitPackage("); appendConstant(buf, packaze); buf.append(");\n"); text.add(buf.toString()); } @Override public void visitRequire(String module, int access, String version) { buf.setLength(0); buf.append("mdv.visitRequire("); appendConstant(buf, module); buf.append(", "); appendAccess(access | ACCESS_MODULE); buf.append(", "); appendConstant(buf, version); buf.append(");\n"); text.add(buf.toString()); } @Override public void visitExport(String packaze, int access, String... modules) { buf.setLength(0); buf.append("mdv.visitExport("); appendConstant(buf, packaze); buf.append(", "); appendAccess(access | ACCESS_MODULE); if (modules != null && modules.length > 0) { buf.append(", new String[] {"); for (int i = 0; i < modules.length; ++i) { buf.append(i == 0 ? " " : ", "); appendConstant(modules[i]); } buf.append(" }"); } buf.append(");\n"); text.add(buf.toString()); } @Override public void visitOpen(String packaze, int access, String... modules) { buf.setLength(0); buf.append("mdv.visitOpen("); appendConstant(buf, packaze); buf.append(", "); appendAccess(access | ACCESS_MODULE); if (modules != null && modules.length > 0) { buf.append(", new String[] {"); for (int i = 0; i < modules.length; ++i) { buf.append(i == 0 ? " " : ", "); appendConstant(modules[i]); } buf.append(" }"); } buf.append(");\n"); text.add(buf.toString()); } @Override public void visitUse(String service) { buf.setLength(0); buf.append("mdv.visitUse("); appendConstant(buf, service); buf.append(");\n"); text.add(buf.toString()); } @Override public void visitProvide(String service, String... providers) { buf.setLength(0); buf.append("mdv.visitProvide("); appendConstant(buf, service); buf.append(", new String[] {"); for (int i = 0; i < providers.length; ++i) { buf.append(i == 0 ? " " : ", "); appendConstant(providers[i]); } buf.append(" });\n"); text.add(buf.toString()); } @Override public void visitModuleEnd() { text.add("mdv.visitEnd();\n"); } // ------------------------------------------------------------------------ // Annotations // ------------------------------------------------------------------------ @Override public void visit(final String name, final Object value) { buf.setLength(0); buf.append("av").append(id).append(".visit("); appendConstant(buf, name); buf.append(", "); appendConstant(buf, value); buf.append(");\n"); text.add(buf.toString()); } @Override public void visitEnum(final String name, final String desc, final String value) { buf.setLength(0); buf.append("av").append(id).append(".visitEnum("); appendConstant(buf, name); buf.append(", "); appendConstant(buf, desc); buf.append(", "); appendConstant(buf, value); buf.append(");\n"); text.add(buf.toString()); } @Override public ASMifier visitAnnotation(final String name, final String desc) { buf.setLength(0); buf.append("{\n"); buf.append("AnnotationVisitor av").append(id + 1).append(" = av"); buf.append(id).append(".visitAnnotation("); appendConstant(buf, name); buf.append(", "); appendConstant(buf, desc); buf.append(");\n"); text.add(buf.toString()); ASMifier a = createASMifier("av", id + 1); text.add(a.getText()); text.add("}\n"); return a; } @Override public ASMifier visitArray(final String name) { buf.setLength(0); buf.append("{\n"); buf.append("AnnotationVisitor av").append(id + 1).append(" = av"); buf.append(id).append(".visitArray("); appendConstant(buf, name); buf.append(");\n"); text.add(buf.toString()); ASMifier a = createASMifier("av", id + 1); text.add(a.getText()); text.add("}\n"); return a; } @Override public void visitAnnotationEnd() { buf.setLength(0); buf.append("av").append(id).append(".visitEnd();\n"); text.add(buf.toString()); } // ------------------------------------------------------------------------ // Fields // ------------------------------------------------------------------------ @Override public ASMifier visitFieldAnnotation(final String desc, final boolean visible) { return visitAnnotation(desc, visible); } @Override public ASMifier visitFieldTypeAnnotation(final int typeRef, final TypePath typePath, final String desc, final boolean visible) { return visitTypeAnnotation(typeRef, typePath, desc, visible); } @Override public void visitFieldAttribute(final Attribute attr) { visitAttribute(attr); } @Override public void visitFieldEnd() { buf.setLength(0); buf.append(name).append(".visitEnd();\n"); text.add(buf.toString()); } // ------------------------------------------------------------------------ // Methods // ------------------------------------------------------------------------ @Override public void visitParameter(String parameterName, int access) { buf.setLength(0); buf.append(name).append(".visitParameter("); appendString(buf, parameterName); buf.append(", "); appendAccess(access); text.add(buf.append(");\n").toString()); } @Override public ASMifier visitAnnotationDefault() { buf.setLength(0); buf.append("{\n").append("av0 = ").append(name) .append(".visitAnnotationDefault();\n"); text.add(buf.toString()); ASMifier a = createASMifier("av", 0); text.add(a.getText()); text.add("}\n"); return a; } @Override public ASMifier visitMethodAnnotation(final String desc, final boolean visible) { return visitAnnotation(desc, visible); } @Override public ASMifier visitMethodTypeAnnotation(final int typeRef, final TypePath typePath, final String desc, final boolean visible) { return visitTypeAnnotation(typeRef, typePath, desc, visible); } @Override public ASMifier visitParameterAnnotation(final int parameter, final String desc, final boolean visible) { buf.setLength(0); buf.append("{\n").append("av0 = ").append(name) .append(".visitParameterAnnotation(").append(parameter) .append(", "); appendConstant(desc); buf.append(", ").append(visible).append(");\n"); text.add(buf.toString()); ASMifier a = createASMifier("av", 0); text.add(a.getText()); text.add("}\n"); return a; } @Override public void visitMethodAttribute(final Attribute attr) { visitAttribute(attr); } @Override public void visitCode() { text.add(name + ".visitCode();\n"); } @Override public void visitFrame(final int type, final int nLocal, final Object[] local, final int nStack, final Object[] stack) { buf.setLength(0); switch (type) { case Opcodes.F_NEW: case Opcodes.F_FULL: declareFrameTypes(nLocal, local); declareFrameTypes(nStack, stack); if (type == Opcodes.F_NEW) { buf.append(name).append(".visitFrame(Opcodes.F_NEW, "); } else { buf.append(name).append(".visitFrame(Opcodes.F_FULL, "); } buf.append(nLocal).append(", new Object[] {"); appendFrameTypes(nLocal, local); buf.append("}, ").append(nStack).append(", new Object[] {"); appendFrameTypes(nStack, stack); buf.append('}'); break; case Opcodes.F_APPEND: declareFrameTypes(nLocal, local); buf.append(name).append(".visitFrame(Opcodes.F_APPEND,") .append(nLocal).append(", new Object[] {"); appendFrameTypes(nLocal, local); buf.append("}, 0, null"); break; case Opcodes.F_CHOP: buf.append(name).append(".visitFrame(Opcodes.F_CHOP,") .append(nLocal).append(", null, 0, null"); break; case Opcodes.F_SAME: buf.append(name).append( ".visitFrame(Opcodes.F_SAME, 0, null, 0, null"); break; case Opcodes.F_SAME1: declareFrameTypes(1, stack); buf.append(name).append( ".visitFrame(Opcodes.F_SAME1, 0, null, 1, new Object[] {"); appendFrameTypes(1, stack); buf.append('}'); break; } buf.append(");\n"); text.add(buf.toString()); } @Override public void visitInsn(final int opcode) { buf.setLength(0); buf.append(name).append(".visitInsn(").append(OPCODES[opcode]) .append(");\n"); text.add(buf.toString()); } @Override public void visitIntInsn(final int opcode, final int operand) { buf.setLength(0); buf.append(name) .append(".visitIntInsn(") .append(OPCODES[opcode]) .append(", ") .append(opcode == Opcodes.NEWARRAY ? TYPES[operand] : Integer .toString(operand)).append(");\n"); text.add(buf.toString()); } @Override public void visitVarInsn(final int opcode, final int var) { buf.setLength(0); buf.append(name).append(".visitVarInsn(").append(OPCODES[opcode]) .append(", ").append(var).append(");\n"); text.add(buf.toString()); } @Override public void visitTypeInsn(final int opcode, final String type) { buf.setLength(0); buf.append(name).append(".visitTypeInsn(").append(OPCODES[opcode]) .append(", "); appendConstant(type); buf.append(");\n"); text.add(buf.toString()); } @Override public void visitFieldInsn(final int opcode, final String owner, final String name, final String desc) { buf.setLength(0); buf.append(this.name).append(".visitFieldInsn(") .append(OPCODES[opcode]).append(", "); appendConstant(owner); buf.append(", "); appendConstant(name); buf.append(", "); appendConstant(desc); buf.append(");\n"); text.add(buf.toString()); } @Deprecated @Override public void visitMethodInsn(final int opcode, final String owner, final String name, final String desc) { if (api >= Opcodes.ASM5) { super.visitMethodInsn(opcode, owner, name, desc); return; } doVisitMethodInsn(opcode, owner, name, desc, opcode == Opcodes.INVOKEINTERFACE); } @Override public void visitMethodInsn(final int opcode, final String owner, final String name, final String desc, final boolean itf) { if (api < Opcodes.ASM5) { super.visitMethodInsn(opcode, owner, name, desc, itf); return; } doVisitMethodInsn(opcode, owner, name, desc, itf); } private void doVisitMethodInsn(final int opcode, final String owner, final String name, final String desc, final boolean itf) { buf.setLength(0); buf.append(this.name).append(".visitMethodInsn(") .append(OPCODES[opcode]).append(", "); appendConstant(owner); buf.append(", "); appendConstant(name); buf.append(", "); appendConstant(desc); buf.append(", "); buf.append(itf ? "true" : "false"); buf.append(");\n"); text.add(buf.toString()); } @Override public void visitInvokeDynamicInsn(String name, String desc, Handle bsm, Object... bsmArgs) { buf.setLength(0); buf.append(this.name).append(".visitInvokeDynamicInsn("); appendConstant(name); buf.append(", "); appendConstant(desc); buf.append(", "); appendConstant(bsm); buf.append(", new Object[]{"); for (int i = 0; i < bsmArgs.length; ++i) { appendConstant(bsmArgs[i]); if (i != bsmArgs.length - 1) { buf.append(", "); } } buf.append("});\n"); text.add(buf.toString()); } @Override public void visitJumpInsn(final int opcode, final Label label) { buf.setLength(0); declareLabel(label); buf.append(name).append(".visitJumpInsn(").append(OPCODES[opcode]) .append(", "); appendLabel(label); buf.append(");\n"); text.add(buf.toString()); } @Override public void visitLabel(final Label label) { buf.setLength(0); declareLabel(label); buf.append(name).append(".visitLabel("); appendLabel(label); buf.append(");\n"); text.add(buf.toString()); } @Override public void visitLdcInsn(final Object cst) { buf.setLength(0); buf.append(name).append(".visitLdcInsn("); appendConstant(cst); buf.append(");\n"); text.add(buf.toString()); } @Override public void visitIincInsn(final int var, final int increment) { buf.setLength(0); buf.append(name).append(".visitIincInsn(").append(var).append(", ") .append(increment).append(");\n"); text.add(buf.toString()); } @Override public void visitTableSwitchInsn(final int min, final int max, final Label dflt, final Label... labels) { buf.setLength(0); for (int i = 0; i < labels.length; ++i) { declareLabel(labels[i]); } declareLabel(dflt); buf.append(name).append(".visitTableSwitchInsn(").append(min) .append(", ").append(max).append(", "); appendLabel(dflt); buf.append(", new Label[] {"); for (int i = 0; i < labels.length; ++i) { buf.append(i == 0 ? " " : ", "); appendLabel(labels[i]); } buf.append(" });\n"); text.add(buf.toString()); } @Override public void visitLookupSwitchInsn(final Label dflt, final int[] keys, final Label[] labels) { buf.setLength(0); for (int i = 0; i < labels.length; ++i) { declareLabel(labels[i]); } declareLabel(dflt); buf.append(name).append(".visitLookupSwitchInsn("); appendLabel(dflt); buf.append(", new int[] {"); for (int i = 0; i < keys.length; ++i) { buf.append(i == 0 ? " " : ", ").append(keys[i]); } buf.append(" }, new Label[] {"); for (int i = 0; i < labels.length; ++i) { buf.append(i == 0 ? " " : ", "); appendLabel(labels[i]); } buf.append(" });\n"); text.add(buf.toString()); } @Override public void visitMultiANewArrayInsn(final String desc, final int dims) { buf.setLength(0); buf.append(name).append(".visitMultiANewArrayInsn("); appendConstant(desc); buf.append(", ").append(dims).append(");\n"); text.add(buf.toString()); } @Override public ASMifier visitInsnAnnotation(final int typeRef, final TypePath typePath, final String desc, final boolean visible) { return visitTypeAnnotation("visitInsnAnnotation", typeRef, typePath, desc, visible); } @Override public void visitTryCatchBlock(final Label start, final Label end, final Label handler, final String type) { buf.setLength(0); declareLabel(start); declareLabel(end); declareLabel(handler); buf.append(name).append(".visitTryCatchBlock("); appendLabel(start); buf.append(", "); appendLabel(end); buf.append(", "); appendLabel(handler); buf.append(", "); appendConstant(type); buf.append(");\n"); text.add(buf.toString()); } @Override public ASMifier visitTryCatchAnnotation(final int typeRef, final TypePath typePath, final String desc, final boolean visible) { return visitTypeAnnotation("visitTryCatchAnnotation", typeRef, typePath, desc, visible); } @Override public void visitLocalVariable(final String name, final String desc, final String signature, final Label start, final Label end, final int index) { buf.setLength(0); buf.append(this.name).append(".visitLocalVariable("); appendConstant(name); buf.append(", "); appendConstant(desc); buf.append(", "); appendConstant(signature); buf.append(", "); appendLabel(start); buf.append(", "); appendLabel(end); buf.append(", ").append(index).append(");\n"); text.add(buf.toString()); } @Override public Printer visitLocalVariableAnnotation(int typeRef, TypePath typePath, Label[] start, Label[] end, int[] index, String desc, boolean visible) { buf.setLength(0); buf.append("{\n").append("av0 = ").append(name) .append(".visitLocalVariableAnnotation("); buf.append(typeRef); if (typePath == null) { buf.append(", null, "); } else { buf.append(", TypePath.fromString(\"").append(typePath).append("\"), "); } buf.append("new Label[] {"); for (int i = 0; i < start.length; ++i) { buf.append(i == 0 ? " " : ", "); appendLabel(start[i]); } buf.append(" }, new Label[] {"); for (int i = 0; i < end.length; ++i) { buf.append(i == 0 ? " " : ", "); appendLabel(end[i]); } buf.append(" }, new int[] {"); for (int i = 0; i < index.length; ++i) { buf.append(i == 0 ? " " : ", ").append(index[i]); } buf.append(" }, "); appendConstant(desc); buf.append(", ").append(visible).append(");\n"); text.add(buf.toString()); ASMifier a = createASMifier("av", 0); text.add(a.getText()); text.add("}\n"); return a; } @Override public void visitLineNumber(final int line, final Label start) { buf.setLength(0); buf.append(name).append(".visitLineNumber(").append(line).append(", "); appendLabel(start); buf.append(");\n"); text.add(buf.toString()); } @Override public void visitMaxs(final int maxStack, final int maxLocals) { buf.setLength(0); buf.append(name).append(".visitMaxs(").append(maxStack).append(", ") .append(maxLocals).append(");\n"); text.add(buf.toString()); } @Override public void visitMethodEnd() { buf.setLength(0); buf.append(name).append(".visitEnd();\n"); text.add(buf.toString()); } // ------------------------------------------------------------------------ // Common methods // ------------------------------------------------------------------------ public ASMifier visitAnnotation(final String desc, final boolean visible) { buf.setLength(0); buf.append("{\n").append("av0 = ").append(name) .append(".visitAnnotation("); appendConstant(desc); buf.append(", ").append(visible).append(");\n"); text.add(buf.toString()); ASMifier a = createASMifier("av", 0); text.add(a.getText()); text.add("}\n"); return a; } public ASMifier visitTypeAnnotation(final int typeRef, final TypePath typePath, final String desc, final boolean visible) { return visitTypeAnnotation("visitTypeAnnotation", typeRef, typePath, desc, visible); } public ASMifier visitTypeAnnotation(final String method, final int typeRef, final TypePath typePath, final String desc, final boolean visible) { buf.setLength(0); buf.append("{\n").append("av0 = ").append(name).append(".") .append(method).append("("); buf.append(typeRef); if (typePath == null) { buf.append(", null, "); } else { buf.append(", TypePath.fromString(\"").append(typePath).append("\"), "); } appendConstant(desc); buf.append(", ").append(visible).append(");\n"); text.add(buf.toString()); ASMifier a = createASMifier("av", 0); text.add(a.getText()); text.add("}\n"); return a; } public void visitAttribute(final Attribute attr) { buf.setLength(0); buf.append("// ATTRIBUTE ").append(attr.type).append('\n'); if (attr instanceof ASMifiable) { if (labelNames == null) { labelNames = new HashMap<Label, String>(); } buf.append("{\n"); ((ASMifiable) attr).asmify(buf, "attr", labelNames); buf.append(name).append(".visitAttribute(attr);\n"); buf.append("}\n"); } text.add(buf.toString()); } // ------------------------------------------------------------------------ // Utility methods // ------------------------------------------------------------------------ protected ASMifier createASMifier(final String name, final int id) { return new ASMifier(Opcodes.ASM6, name, id); }
Appends a string representation of the given access modifiers to buf.
Params:
  • access – some access modifiers.
/** * Appends a string representation of the given access modifiers to * {@link #buf buf}. * * @param access * some access modifiers. */
void appendAccess(final int access) { boolean first = true; if ((access & Opcodes.ACC_PUBLIC) != 0) { buf.append("ACC_PUBLIC"); first = false; } if ((access & Opcodes.ACC_PRIVATE) != 0) { buf.append("ACC_PRIVATE"); first = false; } if ((access & Opcodes.ACC_PROTECTED) != 0) { buf.append("ACC_PROTECTED"); first = false; } if ((access & Opcodes.ACC_FINAL) != 0) { if (!first) { buf.append(" + "); } if ((access & ACCESS_MODULE) == 0) { buf.append("ACC_FINAL"); } else { buf.append("ACC_TRANSITIVE"); } first = false; } if ((access & Opcodes.ACC_STATIC) != 0) { if (!first) { buf.append(" + "); } buf.append("ACC_STATIC"); first = false; } if ((access & (Opcodes.ACC_SYNCHRONIZED | Opcodes.ACC_SUPER | Opcodes.ACC_TRANSITIVE)) != 0) { if (!first) { buf.append(" + "); } if ((access & ACCESS_CLASS) == 0) { if ((access & ACCESS_MODULE) == 0) { buf.append("ACC_SYNCHRONIZED"); } else { buf.append("ACC_TRANSITIVE"); } } else { buf.append("ACC_SUPER"); } first = false; } if ((access & (Opcodes.ACC_VOLATILE | Opcodes.ACC_BRIDGE | Opcodes.ACC_STATIC_PHASE)) != 0) { if (!first) { buf.append(" + "); } if ((access & ACCESS_FIELD) == 0) { if ((access & ACCESS_MODULE) == 0) { buf.append("ACC_BRIDGE"); } else { buf.append("ACC_STATIC_PHASE"); } } else { buf.append("ACC_VOLATILE"); } first = false; } if ((access & Opcodes.ACC_VARARGS) != 0 && (access & ACCESS_CLASS) == 0 && (access & ACCESS_FIELD) == 0) { if (!first) { buf.append(" + "); } buf.append("ACC_VARARGS"); first = false; } if ((access & Opcodes.ACC_TRANSIENT) != 0 && (access & ACCESS_FIELD) != 0) { if (!first) { buf.append(" + "); } buf.append("ACC_TRANSIENT"); first = false; } if ((access & Opcodes.ACC_NATIVE) != 0 && (access & ACCESS_CLASS) == 0 && (access & ACCESS_FIELD) == 0) { if (!first) { buf.append(" + "); } buf.append("ACC_NATIVE"); first = false; } if ((access & Opcodes.ACC_ENUM) != 0 && ((access & ACCESS_CLASS) != 0 || (access & ACCESS_FIELD) != 0 || (access & ACCESS_INNER) != 0)) { if (!first) { buf.append(" + "); } buf.append("ACC_ENUM"); first = false; } if ((access & Opcodes.ACC_ANNOTATION) != 0 && ((access & ACCESS_CLASS) != 0 || (access & ACCESS_INNER) != 0)) { if (!first) { buf.append(" + "); } buf.append("ACC_ANNOTATION"); first = false; } if ((access & Opcodes.ACC_ABSTRACT) != 0) { if (!first) { buf.append(" + "); } buf.append("ACC_ABSTRACT"); first = false; } if ((access & Opcodes.ACC_INTERFACE) != 0) { if (!first) { buf.append(" + "); } buf.append("ACC_INTERFACE"); first = false; } if ((access & Opcodes.ACC_STRICT) != 0) { if (!first) { buf.append(" + "); } buf.append("ACC_STRICT"); first = false; } if ((access & Opcodes.ACC_SYNTHETIC) != 0) { if (!first) { buf.append(" + "); } buf.append("ACC_SYNTHETIC"); first = false; } if ((access & Opcodes.ACC_DEPRECATED) != 0) { if (!first) { buf.append(" + "); } buf.append("ACC_DEPRECATED"); first = false; } if ((access & (Opcodes.ACC_MANDATED | Opcodes.ACC_MODULE)) != 0) { if (!first) { buf.append(" + "); } if ((access & ACCESS_CLASS) == 0) { buf.append("ACC_MANDATED"); } else { buf.append("ACC_MODULE"); } first = false; } if (first) { buf.append('0'); } }
Appends a string representation of the given constant to the given buffer.
Params:
/** * Appends a string representation of the given constant to the given * buffer. * * @param cst * an {@link Integer}, {@link Float}, {@link Long}, * {@link Double} or {@link String} object. May be <tt>null</tt>. */
protected void appendConstant(final Object cst) { appendConstant(buf, cst); }
Appends a string representation of the given constant to the given buffer.
Params:
/** * Appends a string representation of the given constant to the given * buffer. * * @param buf * a string buffer. * @param cst * an {@link Integer}, {@link Float}, {@link Long}, * {@link Double} or {@link String} object. May be <tt>null</tt>. */
static void appendConstant(final StringBuffer buf, final Object cst) { if (cst == null) { buf.append("null"); } else if (cst instanceof String) { appendString(buf, (String) cst); } else if (cst instanceof Type) { buf.append("Type.getType(\""); buf.append(((Type) cst).getDescriptor()); buf.append("\")"); } else if (cst instanceof Handle) { buf.append("new Handle("); Handle h = (Handle) cst; buf.append("Opcodes.").append(HANDLE_TAG[h.getTag()]) .append(", \""); buf.append(h.getOwner()).append("\", \""); buf.append(h.getName()).append("\", \""); buf.append(h.getDesc()).append("\", "); buf.append(h.isInterface()).append(")"); } else if (cst instanceof Byte) { buf.append("new Byte((byte)").append(cst).append(')'); } else if (cst instanceof Boolean) { buf.append(((Boolean) cst).booleanValue() ? "Boolean.TRUE" : "Boolean.FALSE"); } else if (cst instanceof Short) { buf.append("new Short((short)").append(cst).append(')'); } else if (cst instanceof Character) { int c = ((Character) cst).charValue(); buf.append("new Character((char)").append(c).append(')'); } else if (cst instanceof Integer) { buf.append("new Integer(").append(cst).append(')'); } else if (cst instanceof Float) { buf.append("new Float(\"").append(cst).append("\")"); } else if (cst instanceof Long) { buf.append("new Long(").append(cst).append("L)"); } else if (cst instanceof Double) { buf.append("new Double(\"").append(cst).append("\")"); } else if (cst instanceof byte[]) { byte[] v = (byte[]) cst; buf.append("new byte[] {"); for (int i = 0; i < v.length; i++) { buf.append(i == 0 ? "" : ",").append(v[i]); } buf.append('}'); } else if (cst instanceof boolean[]) { boolean[] v = (boolean[]) cst; buf.append("new boolean[] {"); for (int i = 0; i < v.length; i++) { buf.append(i == 0 ? "" : ",").append(v[i]); } buf.append('}'); } else if (cst instanceof short[]) { short[] v = (short[]) cst; buf.append("new short[] {"); for (int i = 0; i < v.length; i++) { buf.append(i == 0 ? "" : ",").append("(short)").append(v[i]); } buf.append('}'); } else if (cst instanceof char[]) { char[] v = (char[]) cst; buf.append("new char[] {"); for (int i = 0; i < v.length; i++) { buf.append(i == 0 ? "" : ",").append("(char)") .append((int) v[i]); } buf.append('}'); } else if (cst instanceof int[]) { int[] v = (int[]) cst; buf.append("new int[] {"); for (int i = 0; i < v.length; i++) { buf.append(i == 0 ? "" : ",").append(v[i]); } buf.append('}'); } else if (cst instanceof long[]) { long[] v = (long[]) cst; buf.append("new long[] {"); for (int i = 0; i < v.length; i++) { buf.append(i == 0 ? "" : ",").append(v[i]).append('L'); } buf.append('}'); } else if (cst instanceof float[]) { float[] v = (float[]) cst; buf.append("new float[] {"); for (int i = 0; i < v.length; i++) { buf.append(i == 0 ? "" : ",").append(v[i]).append('f'); } buf.append('}'); } else if (cst instanceof double[]) { double[] v = (double[]) cst; buf.append("new double[] {"); for (int i = 0; i < v.length; i++) { buf.append(i == 0 ? "" : ",").append(v[i]).append('d'); } buf.append('}'); } } private void declareFrameTypes(final int n, final Object[] o) { for (int i = 0; i < n; ++i) { if (o[i] instanceof Label) { declareLabel((Label) o[i]); } } } private void appendFrameTypes(final int n, final Object[] o) { for (int i = 0; i < n; ++i) { if (i > 0) { buf.append(", "); } if (o[i] instanceof String) { appendConstant(o[i]); } else if (o[i] instanceof Integer) { switch (((Integer) o[i]).intValue()) { case 0: buf.append("Opcodes.TOP"); break; case 1: buf.append("Opcodes.INTEGER"); break; case 2: buf.append("Opcodes.FLOAT"); break; case 3: buf.append("Opcodes.DOUBLE"); break; case 4: buf.append("Opcodes.LONG"); break; case 5: buf.append("Opcodes.NULL"); break; case 6: buf.append("Opcodes.UNINITIALIZED_THIS"); break; } } else { appendLabel((Label) o[i]); } } }
Appends a declaration of the given label to buf. This declaration is of the form "Label lXXX = new Label();". Does nothing if the given label has already been declared.
Params:
  • l – a label.
/** * Appends a declaration of the given label to {@link #buf buf}. This * declaration is of the form "Label lXXX = new Label();". Does nothing if * the given label has already been declared. * * @param l * a label. */
protected void declareLabel(final Label l) { if (labelNames == null) { labelNames = new HashMap<Label, String>(); } String name = labelNames.get(l); if (name == null) { name = "l" + labelNames.size(); labelNames.put(l, name); buf.append("Label ").append(name).append(" = new Label();\n"); } }
Appends the name of the given label to buf. The given label must already have a name. One way to ensure this is to always call declared before calling this method.
Params:
  • l – a label.
/** * Appends the name of the given label to {@link #buf buf}. The given label * <i>must</i> already have a name. One way to ensure this is to always call * {@link #declareLabel declared} before calling this method. * * @param l * a label. */
protected void appendLabel(final Label l) { buf.append(labelNames.get(l)); } }