org.ow2.asm/asm-util/5.2 : org/objectweb/asm/xml/ASMContentHandler.java

ASMContentHandler
http://asm.objectweb.org/asm-util/: A very small and fast Java bytecode manipulation framework (ObjectWeb)
Eric Bruneton
Eugene Kuleshov
Remi Forax
ASM XML Adapter
Copyright (c) 2004-2011, Eugene Kuleshov
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.
/***
 * ASM XML Adapter
 * Copyright (c) 2004-2011, Eugene Kuleshov
 * 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 org.objectweb.asm.xml;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;

import org.objectweb.asm.AnnotationVisitor;
import org.objectweb.asm.ClassVisitor;
import org.objectweb.asm.FieldVisitor;
import org.objectweb.asm.Handle;
import org.objectweb.asm.Label;
import org.objectweb.asm.MethodVisitor;
import org.objectweb.asm.Opcodes;
import org.objectweb.asm.Type;
import org.objectweb.asm.TypePath;
import org.xml.sax.Attributes;
import org.xml.sax.SAXException;
import org.xml.sax.helpers.DefaultHandler;

A ContentHandler that transforms XML document into Java class file. This class can be feeded by any kind of SAX 2.0 event producers, e.g. XML parser, XSLT or XPath engines, or custom code. 
Author: Eugene Kuleshov
See Also: SAXClassAdapter
Processor/**
 * A {@link org.xml.sax.ContentHandler ContentHandler} that transforms XML
 * document into Java class file. This class can be feeded by any kind of SAX
 * 2.0 event producers, e.g. XML parser, XSLT or XPath engines, or custom code.
 * 
 * @see org.objectweb.asm.xml.SAXClassAdapter
 * @see org.objectweb.asm.xml.Processor
 * 
 * @author Eugene Kuleshov
 */
public class ASMContentHandler extends DefaultHandler implements Opcodes {

    Stack of the intermediate processing contexts.
/**
     * Stack of the intermediate processing contexts.
     */
    private final ArrayList<Object> stack = new ArrayList<Object>();

    Complete name of the current element.
/**
     * Complete name of the current element.
     */
    String match = "";

    Current instance of the ClassVisitor used to visit classfile bytecode. /**
     * Current instance of the {@link ClassVisitor ClassVisitor} used to visit
     * classfile bytecode.
     */
    protected ClassVisitor cv;

    Map of the active Label instances for current method. /**
     * Map of the active {@link Label Label} instances for current method.
     */
    protected Map<Object, Label> labels;

    private static final String BASE = "class";

    private final RuleSet RULES = new RuleSet();
    {
        RULES.add(BASE, new ClassRule());
        RULES.add(BASE + "/interfaces/interface", new InterfaceRule());
        RULES.add(BASE + "/interfaces", new InterfacesRule());
        RULES.add(BASE + "/outerclass", new OuterClassRule());
        RULES.add(BASE + "/innerclass", new InnerClassRule());
        RULES.add(BASE + "/source", new SourceRule());
        RULES.add(BASE + "/field", new FieldRule());

        RULES.add(BASE + "/method", new MethodRule());
        RULES.add(BASE + "/method/exceptions/exception", new ExceptionRule());
        RULES.add(BASE + "/method/exceptions", new ExceptionsRule());

        RULES.add(BASE + "/method/parameter", new MethodParameterRule());
        RULES.add(BASE + "/method/annotationDefault",
                new AnnotationDefaultRule());

        RULES.add(BASE + "/method/code/*", new OpcodesRule()); // opcodes

        RULES.add(BASE + "/method/code/frame", new FrameRule());
        RULES.add(BASE + "/method/code/frame/local", new FrameTypeRule());
        RULES.add(BASE + "/method/code/frame/stack", new FrameTypeRule());

        RULES.add(BASE + "/method/code/TABLESWITCH", new TableSwitchRule());
        RULES.add(BASE + "/method/code/TABLESWITCH/label",
                new TableSwitchLabelRule());
        RULES.add(BASE + "/method/code/LOOKUPSWITCH", new LookupSwitchRule());
        RULES.add(BASE + "/method/code/LOOKUPSWITCH/label",
                new LookupSwitchLabelRule());

        RULES.add(BASE + "/method/code/INVOKEDYNAMIC", new InvokeDynamicRule());
        RULES.add(BASE + "/method/code/INVOKEDYNAMIC/bsmArg",
                new InvokeDynamicBsmArgumentsRule());

        RULES.add(BASE + "/method/code/Label", new LabelRule());
        RULES.add(BASE + "/method/code/TryCatch", new TryCatchRule());
        RULES.add(BASE + "/method/code/LineNumber", new LineNumberRule());
        RULES.add(BASE + "/method/code/LocalVar", new LocalVarRule());
        RULES.add(BASE + "/method/code/Max", new MaxRule());

        RULES.add("*/annotation", new AnnotationRule());
        RULES.add("*/typeAnnotation", new TypeAnnotationRule());
        RULES.add("*/parameterAnnotation", new AnnotationParameterRule());
        RULES.add("*/insnAnnotation", new InsnAnnotationRule());
        RULES.add("*/tryCatchAnnotation", new TryCatchAnnotationRule());
        RULES.add("*/localVariableAnnotation",
                new LocalVariableAnnotationRule());
        RULES.add("*/annotationValue", new AnnotationValueRule());
        RULES.add("*/annotationValueAnnotation",
                new AnnotationValueAnnotationRule());
        RULES.add("*/annotationValueEnum", new AnnotationValueEnumRule());
        RULES.add("*/annotationValueArray", new AnnotationValueArrayRule());
    }

    private static interface OpcodeGroup {
        public static final int INSN = 0;
        public static final int INSN_INT = 1;
        public static final int INSN_VAR = 2;
        public static final int INSN_TYPE = 3;
        public static final int INSN_FIELD = 4;
        public static final int INSN_METHOD = 5;
        public static final int INSN_JUMP = 6;
        public static final int INSN_LDC = 7;
        public static final int INSN_IINC = 8;
        public static final int INSN_MULTIANEWARRAY = 9;
    }

    Map of the opcode names to opcode and opcode group
/**
     * Map of the opcode names to opcode and opcode group
     */
    static final HashMap<String, Opcode> OPCODES = new HashMap<String, Opcode>();
    static {
        addOpcode("NOP", NOP, OpcodeGroup.INSN);
        addOpcode("ACONST_NULL", ACONST_NULL, OpcodeGroup.INSN);
        addOpcode("ICONST_M1", ICONST_M1, OpcodeGroup.INSN);
        addOpcode("ICONST_0", ICONST_0, OpcodeGroup.INSN);
        addOpcode("ICONST_1", ICONST_1, OpcodeGroup.INSN);
        addOpcode("ICONST_2", ICONST_2, OpcodeGroup.INSN);
        addOpcode("ICONST_3", ICONST_3, OpcodeGroup.INSN);
        addOpcode("ICONST_4", ICONST_4, OpcodeGroup.INSN);
        addOpcode("ICONST_5", ICONST_5, OpcodeGroup.INSN);
        addOpcode("LCONST_0", LCONST_0, OpcodeGroup.INSN);
        addOpcode("LCONST_1", LCONST_1, OpcodeGroup.INSN);
        addOpcode("FCONST_0", FCONST_0, OpcodeGroup.INSN);
        addOpcode("FCONST_1", FCONST_1, OpcodeGroup.INSN);
        addOpcode("FCONST_2", FCONST_2, OpcodeGroup.INSN);
        addOpcode("DCONST_0", DCONST_0, OpcodeGroup.INSN);
        addOpcode("DCONST_1", DCONST_1, OpcodeGroup.INSN);
        addOpcode("BIPUSH", BIPUSH, OpcodeGroup.INSN_INT);
        addOpcode("SIPUSH", SIPUSH, OpcodeGroup.INSN_INT);
        addOpcode("LDC", LDC, OpcodeGroup.INSN_LDC);
        addOpcode("ILOAD", ILOAD, OpcodeGroup.INSN_VAR);
        addOpcode("LLOAD", LLOAD, OpcodeGroup.INSN_VAR);
        addOpcode("FLOAD", FLOAD, OpcodeGroup.INSN_VAR);
        addOpcode("DLOAD", DLOAD, OpcodeGroup.INSN_VAR);
        addOpcode("ALOAD", ALOAD, OpcodeGroup.INSN_VAR);
        addOpcode("IALOAD", IALOAD, OpcodeGroup.INSN);
        addOpcode("LALOAD", LALOAD, OpcodeGroup.INSN);
        addOpcode("FALOAD", FALOAD, OpcodeGroup.INSN);
        addOpcode("DALOAD", DALOAD, OpcodeGroup.INSN);
        addOpcode("AALOAD", AALOAD, OpcodeGroup.INSN);
        addOpcode("BALOAD", BALOAD, OpcodeGroup.INSN);
        addOpcode("CALOAD", CALOAD, OpcodeGroup.INSN);
        addOpcode("SALOAD", SALOAD, OpcodeGroup.INSN);
        addOpcode("ISTORE", ISTORE, OpcodeGroup.INSN_VAR);
        addOpcode("LSTORE", LSTORE, OpcodeGroup.INSN_VAR);
        addOpcode("FSTORE", FSTORE, OpcodeGroup.INSN_VAR);
        addOpcode("DSTORE", DSTORE, OpcodeGroup.INSN_VAR);
        addOpcode("ASTORE", ASTORE, OpcodeGroup.INSN_VAR);
        addOpcode("IASTORE", IASTORE, OpcodeGroup.INSN);
        addOpcode("LASTORE", LASTORE, OpcodeGroup.INSN);
        addOpcode("FASTORE", FASTORE, OpcodeGroup.INSN);
        addOpcode("DASTORE", DASTORE, OpcodeGroup.INSN);
        addOpcode("AASTORE", AASTORE, OpcodeGroup.INSN);
        addOpcode("BASTORE", BASTORE, OpcodeGroup.INSN);
        addOpcode("CASTORE", CASTORE, OpcodeGroup.INSN);
        addOpcode("SASTORE", SASTORE, OpcodeGroup.INSN);
        addOpcode("POP", POP, OpcodeGroup.INSN);
        addOpcode("POP2", POP2, OpcodeGroup.INSN);
        addOpcode("DUP", DUP, OpcodeGroup.INSN);
        addOpcode("DUP_X1", DUP_X1, OpcodeGroup.INSN);
        addOpcode("DUP_X2", DUP_X2, OpcodeGroup.INSN);
        addOpcode("DUP2", DUP2, OpcodeGroup.INSN);
        addOpcode("DUP2_X1", DUP2_X1, OpcodeGroup.INSN);
        addOpcode("DUP2_X2", DUP2_X2, OpcodeGroup.INSN);
        addOpcode("SWAP", SWAP, OpcodeGroup.INSN);
        addOpcode("IADD", IADD, OpcodeGroup.INSN);
        addOpcode("LADD", LADD, OpcodeGroup.INSN);
        addOpcode("FADD", FADD, OpcodeGroup.INSN);
        addOpcode("DADD", DADD, OpcodeGroup.INSN);
        addOpcode("ISUB", ISUB, OpcodeGroup.INSN);
        addOpcode("LSUB", LSUB, OpcodeGroup.INSN);
        addOpcode("FSUB", FSUB, OpcodeGroup.INSN);
        addOpcode("DSUB", DSUB, OpcodeGroup.INSN);
        addOpcode("IMUL", IMUL, OpcodeGroup.INSN);
        addOpcode("LMUL", LMUL, OpcodeGroup.INSN);
        addOpcode("FMUL", FMUL, OpcodeGroup.INSN);
        addOpcode("DMUL", DMUL, OpcodeGroup.INSN);
        addOpcode("IDIV", IDIV, OpcodeGroup.INSN);
        addOpcode("LDIV", LDIV, OpcodeGroup.INSN);
        addOpcode("FDIV", FDIV, OpcodeGroup.INSN);
        addOpcode("DDIV", DDIV, OpcodeGroup.INSN);
        addOpcode("IREM", IREM, OpcodeGroup.INSN);
        addOpcode("LREM", LREM, OpcodeGroup.INSN);
        addOpcode("FREM", FREM, OpcodeGroup.INSN);
        addOpcode("DREM", DREM, OpcodeGroup.INSN);
        addOpcode("INEG", INEG, OpcodeGroup.INSN);
        addOpcode("LNEG", LNEG, OpcodeGroup.INSN);
        addOpcode("FNEG", FNEG, OpcodeGroup.INSN);
        addOpcode("DNEG", DNEG, OpcodeGroup.INSN);
        addOpcode("ISHL", ISHL, OpcodeGroup.INSN);
        addOpcode("LSHL", LSHL, OpcodeGroup.INSN);
        addOpcode("ISHR", ISHR, OpcodeGroup.INSN);
        addOpcode("LSHR", LSHR, OpcodeGroup.INSN);
        addOpcode("IUSHR", IUSHR, OpcodeGroup.INSN);
        addOpcode("LUSHR", LUSHR, OpcodeGroup.INSN);
        addOpcode("IAND", IAND, OpcodeGroup.INSN);
        addOpcode("LAND", LAND, OpcodeGroup.INSN);
        addOpcode("IOR", IOR, OpcodeGroup.INSN);
        addOpcode("LOR", LOR, OpcodeGroup.INSN);
        addOpcode("IXOR", IXOR, OpcodeGroup.INSN);
        addOpcode("LXOR", LXOR, OpcodeGroup.INSN);
        addOpcode("IINC", IINC, OpcodeGroup.INSN_IINC);
        addOpcode("I2L", I2L, OpcodeGroup.INSN);
        addOpcode("I2F", I2F, OpcodeGroup.INSN);
        addOpcode("I2D", I2D, OpcodeGroup.INSN);
        addOpcode("L2I", L2I, OpcodeGroup.INSN);
        addOpcode("L2F", L2F, OpcodeGroup.INSN);
        addOpcode("L2D", L2D, OpcodeGroup.INSN);
        addOpcode("F2I", F2I, OpcodeGroup.INSN);
        addOpcode("F2L", F2L, OpcodeGroup.INSN);
        addOpcode("F2D", F2D, OpcodeGroup.INSN);
        addOpcode("D2I", D2I, OpcodeGroup.INSN);
        addOpcode("D2L", D2L, OpcodeGroup.INSN);
        addOpcode("D2F", D2F, OpcodeGroup.INSN);
        addOpcode("I2B", I2B, OpcodeGroup.INSN);
        addOpcode("I2C", I2C, OpcodeGroup.INSN);
        addOpcode("I2S", I2S, OpcodeGroup.INSN);
        addOpcode("LCMP", LCMP, OpcodeGroup.INSN);
        addOpcode("FCMPL", FCMPL, OpcodeGroup.INSN);
        addOpcode("FCMPG", FCMPG, OpcodeGroup.INSN);
        addOpcode("DCMPL", DCMPL, OpcodeGroup.INSN);
        addOpcode("DCMPG", DCMPG, OpcodeGroup.INSN);
        addOpcode("IFEQ", IFEQ, OpcodeGroup.INSN_JUMP);
        addOpcode("IFNE", IFNE, OpcodeGroup.INSN_JUMP);
        addOpcode("IFLT", IFLT, OpcodeGroup.INSN_JUMP);
        addOpcode("IFGE", IFGE, OpcodeGroup.INSN_JUMP);
        addOpcode("IFGT", IFGT, OpcodeGroup.INSN_JUMP);
        addOpcode("IFLE", IFLE, OpcodeGroup.INSN_JUMP);
        addOpcode("IF_ICMPEQ", IF_ICMPEQ, OpcodeGroup.INSN_JUMP);
        addOpcode("IF_ICMPNE", IF_ICMPNE, OpcodeGroup.INSN_JUMP);
        addOpcode("IF_ICMPLT", IF_ICMPLT, OpcodeGroup.INSN_JUMP);
        addOpcode("IF_ICMPGE", IF_ICMPGE, OpcodeGroup.INSN_JUMP);
        addOpcode("IF_ICMPGT", IF_ICMPGT, OpcodeGroup.INSN_JUMP);
        addOpcode("IF_ICMPLE", IF_ICMPLE, OpcodeGroup.INSN_JUMP);
        addOpcode("IF_ACMPEQ", IF_ACMPEQ, OpcodeGroup.INSN_JUMP);
        addOpcode("IF_ACMPNE", IF_ACMPNE, OpcodeGroup.INSN_JUMP);
        addOpcode("GOTO", GOTO, OpcodeGroup.INSN_JUMP);
        addOpcode("JSR", JSR, OpcodeGroup.INSN_JUMP);
        addOpcode("RET", RET, OpcodeGroup.INSN_VAR);
        addOpcode("IRETURN", IRETURN, OpcodeGroup.INSN);
        addOpcode("LRETURN", LRETURN, OpcodeGroup.INSN);
        addOpcode("FRETURN", FRETURN, OpcodeGroup.INSN);
        addOpcode("DRETURN", DRETURN, OpcodeGroup.INSN);
        addOpcode("ARETURN", ARETURN, OpcodeGroup.INSN);
        addOpcode("RETURN", RETURN, OpcodeGroup.INSN);
        addOpcode("GETSTATIC", GETSTATIC, OpcodeGroup.INSN_FIELD);
        addOpcode("PUTSTATIC", PUTSTATIC, OpcodeGroup.INSN_FIELD);
        addOpcode("GETFIELD", GETFIELD, OpcodeGroup.INSN_FIELD);
        addOpcode("PUTFIELD", PUTFIELD, OpcodeGroup.INSN_FIELD);
        addOpcode("INVOKEVIRTUAL", INVOKEVIRTUAL, OpcodeGroup.INSN_METHOD);
        addOpcode("INVOKESPECIAL", INVOKESPECIAL, OpcodeGroup.INSN_METHOD);
        addOpcode("INVOKESTATIC", INVOKESTATIC, OpcodeGroup.INSN_METHOD);
        addOpcode("INVOKEINTERFACE", INVOKEINTERFACE, OpcodeGroup.INSN_METHOD);
        addOpcode("NEW", NEW, OpcodeGroup.INSN_TYPE);
        addOpcode("NEWARRAY", NEWARRAY, OpcodeGroup.INSN_INT);
        addOpcode("ANEWARRAY", ANEWARRAY, OpcodeGroup.INSN_TYPE);
        addOpcode("ARRAYLENGTH", ARRAYLENGTH, OpcodeGroup.INSN);
        addOpcode("ATHROW", ATHROW, OpcodeGroup.INSN);
        addOpcode("CHECKCAST", CHECKCAST, OpcodeGroup.INSN_TYPE);
        addOpcode("INSTANCEOF", INSTANCEOF, OpcodeGroup.INSN_TYPE);
        addOpcode("MONITORENTER", MONITORENTER, OpcodeGroup.INSN);
        addOpcode("MONITOREXIT", MONITOREXIT, OpcodeGroup.INSN);
        addOpcode("MULTIANEWARRAY", MULTIANEWARRAY,
                OpcodeGroup.INSN_MULTIANEWARRAY);
        addOpcode("IFNULL", IFNULL, OpcodeGroup.INSN_JUMP);
        addOpcode("IFNONNULL", IFNONNULL, OpcodeGroup.INSN_JUMP);
    }

    private static void addOpcode(String operStr, int oper, int group) {
        OPCODES.put(operStr, new Opcode(oper, group));
    }

    static final HashMap<String, Integer> TYPES = new HashMap<String, Integer>();
    static {
        String[] types = SAXCodeAdapter.TYPES;
        for (int i = 0; i < types.length; i++) {
            TYPES.put(types[i], i);
        }
    }

    Constructs a new ASMContentHandler object. 
Params: cv – 
           class visitor that will be called to reconstruct the classfile
           using the XML stream./**
     * Constructs a new {@link ASMContentHandler ASMContentHandler} object.
     * 
     * @param cv
     *            class visitor that will be called to reconstruct the classfile
     *            using the XML stream.
     */
    public ASMContentHandler(final ClassVisitor cv) {
        this.cv = cv;
    }

    Process notification of the start of an XML element being reached.
Params: ns – 
           - The Namespace URI, or the empty string if the element has no
           Namespace URI or if Namespace processing is not being
           performed.
lName – 
           - The local name (without prefix), or the empty string if
           Namespace processing is not being performed.
qName – 
           - The qualified name (with prefix), or the empty string if
           qualified names are not available.
list – 
           - The attributes attached to the element. If there are no
           attributes, it shall be an empty Attributes object.
Throws: SAXException – 
               if a parsing error is to be reported/**
     * Process notification of the start of an XML element being reached.
     * 
     * @param ns
     *            - The Namespace URI, or the empty string if the element has no
     *            Namespace URI or if Namespace processing is not being
     *            performed.
     * @param lName
     *            - The local name (without prefix), or the empty string if
     *            Namespace processing is not being performed.
     * @param qName
     *            - The qualified name (with prefix), or the empty string if
     *            qualified names are not available.
     * @param list
     *            - The attributes attached to the element. If there are no
     *            attributes, it shall be an empty Attributes object.
     * @exception SAXException
     *                if a parsing error is to be reported
     */
    @Override
    public final void startElement(final String ns, final String lName,
            final String qName, final Attributes list) throws SAXException {
        // the actual element name is either in lName or qName, depending
        // on whether the parser is namespace aware
        String name = lName == null || lName.length() == 0 ? qName : lName;

        // Compute the current matching rule
        StringBuilder sb = new StringBuilder(match);
        if (match.length() > 0) {
            sb.append('/');
        }
        sb.append(name);
        match = sb.toString();

        // Fire "begin" events for all relevant rules
        Rule r = (Rule) RULES.match(match);
        if (r != null) {
            r.begin(name, list);
        }
    }

    Process notification of the end of an XML element being reached.
Params: ns – 
           - The Namespace URI, or the empty string if the element has no
           Namespace URI or if Namespace processing is not being
           performed.
lName – 
           - The local name (without prefix), or the empty string if
           Namespace processing is not being performed.
qName – 
           - The qualified XML 1.0 name (with prefix), or the empty
           string if qualified names are not available.
Throws: SAXException – 
               if a parsing error is to be reported/**
     * Process notification of the end of an XML element being reached.
     * 
     * @param ns
     *            - The Namespace URI, or the empty string if the element has no
     *            Namespace URI or if Namespace processing is not being
     *            performed.
     * @param lName
     *            - The local name (without prefix), or the empty string if
     *            Namespace processing is not being performed.
     * @param qName
     *            - The qualified XML 1.0 name (with prefix), or the empty
     *            string if qualified names are not available.
     * 
     * @exception SAXException
     *                if a parsing error is to be reported
     */
    @Override
    public final void endElement(final String ns, final String lName,
            final String qName) throws SAXException {
        // the actual element name is either in lName or qName, depending
        // on whether the parser is namespace aware
        String name = lName == null || lName.length() == 0 ? qName : lName;

        // Fire "end" events for all relevant rules in reverse order
        Rule r = (Rule) RULES.match(match);
        if (r != null) {
            r.end(name);
        }

        // Recover the previous match expression
        int slash = match.lastIndexOf('/');
        if (slash >= 0) {
            match = match.substring(0, slash);
        } else {
            match = "";
        }
    }

    Return the top object on the stack without removing it. If there are no
objects on the stack, return null.
Returns: the top object on the stack without removing it./**
     * Return the top object on the stack without removing it. If there are no
     * objects on the stack, return <code>null</code>.
     * 
     * @return the top object on the stack without removing it.
     */
    final Object peek() {
        int size = stack.size();
        return size == 0 ? null : stack.get(size - 1);
    }

    Pop the top object off of the stack, and return it. If there are no
objects on the stack, return null.
Returns: the top object off of the stack./**
     * Pop the top object off of the stack, and return it. If there are no
     * objects on the stack, return <code>null</code>.
     * 
     * @return the top object off of the stack.
     */
    final Object pop() {
        int size = stack.size();
        return size == 0 ? null : stack.remove(size - 1);
    }

    Push a new object onto the top of the object stack.
Params: object – 
           The new object/**
     * Push a new object onto the top of the object stack.
     * 
     * @param object
     *            The new object
     */
    final void push(final Object object) {
        stack.add(object);
    }

    static final class RuleSet {

        private final HashMap<String, Object> rules = new HashMap<String, Object>();

        private final ArrayList<String> lpatterns = new ArrayList<String>();

        private final ArrayList<String> rpatterns = new ArrayList<String>();

        public void add(final String path, final Object rule) {
            String pattern = path;
            if (path.startsWith("*/")) {
                pattern = path.substring(1);
                lpatterns.add(pattern);
            } else if (path.endsWith("/*")) {
                pattern = path.substring(0, path.length() - 1);
                rpatterns.add(pattern);
            }
            rules.put(pattern, rule);
        }

        public Object match(final String path) {
            if (rules.containsKey(path)) {
                return rules.get(path);
            }

            int n = path.lastIndexOf('/');
            for (Iterator<String> it = lpatterns.iterator(); it.hasNext();) {
                String pattern = it.next();
                if (path.substring(n).endsWith(pattern)) {
                    return rules.get(pattern);
                }
            }

            for (Iterator<String> it = rpatterns.iterator(); it.hasNext();) {
                String pattern = it.next();
                if (path.startsWith(pattern)) {
                    return rules.get(pattern);
                }
            }

            return null;
        }
    }

    Rule
/**
     * Rule
     */
    protected abstract class Rule {

        public void begin(final String name, final Attributes attrs)
                throws SAXException {
        }

        public void end(final String name) {
        }

        protected final Object getValue(final String desc, final String val)
                throws SAXException {
            Object value = null;
            if (val != null) {
                if ("Ljava/lang/String;".equals(desc)) {
                    value = decode(val);
                } else if ("Ljava/lang/Integer;".equals(desc)
                        || "I".equals(desc) || "S".equals(desc)
                        || "B".equals(desc) || "C".equals(desc)
                        || "Z".equals(desc)) {
                    value = new Integer(val);

                } else if ("Ljava/lang/Short;".equals(desc)) {
                    value = new Short(val);

                } else if ("Ljava/lang/Byte;".equals(desc)) {
                    value = new Byte(val);

                } else if ("Ljava/lang/Character;".equals(desc)) {
                    value = new Character(decode(val).charAt(0));

                } else if ("Ljava/lang/Boolean;".equals(desc)) {
                    value = Boolean.valueOf(val);

                } else if ("Ljava/lang/Long;".equals(desc) || "J".equals(desc)) {
                    value = new Long(val);
                } else if ("Ljava/lang/Float;".equals(desc) || "F".equals(desc)) {
                    value = new Float(val);
                } else if ("Ljava/lang/Double;".equals(desc)
                        || "D".equals(desc)) {
                    value = new Double(val);
                } else if (Type.getDescriptor(Type.class).equals(desc)) {
                    value = Type.getType(val);

                } else if (Type.getDescriptor(Handle.class).equals(desc)) {
                    value = decodeHandle(val);

                } else {
                    // TODO use of default toString().
                    throw new SAXException("Invalid value:" + val + " desc:"
                            + desc + " ctx:" + this);
                }
            }
            return value;
        }

        Handle decodeHandle(final String val) throws SAXException {
            try {
                int dotIndex = val.indexOf('.');
                int descIndex = val.indexOf('(', dotIndex + 1);
                int tagIndex = val.lastIndexOf('(');
                int itfIndex = val.indexOf(' ', tagIndex + 1);
                
                boolean itf = itfIndex != -1;
                int tag = Integer.parseInt(
                              val.substring(tagIndex + 1,
                                    itf? val.length() - 1: itfIndex));
                String owner = val.substring(0, dotIndex);
                String name = val.substring(dotIndex + 1, descIndex);
                String desc = val.substring(descIndex, tagIndex - 1);
                return new Handle(tag, owner, name, desc, itf);

            } catch (RuntimeException e) {
                throw new SAXException("Malformed handle " + val, e);
            }
        }

        private final String decode(final String val) throws SAXException {
            StringBuilder sb = new StringBuilder(val.length());
            try {
                int n = 0;
                while (n < val.length()) {
                    char c = val.charAt(n);
                    if (c == '\\') {
                        n++;
                        c = val.charAt(n);
                        if (c == '\\') {
                            sb.append('\\');
                        } else {
                            n++; // skip 'u'
                            sb.append((char) Integer.parseInt(
                                    val.substring(n, n + 4), 16));
                            n += 3;
                        }
                    } else {
                        sb.append(c);
                    }
                    n++;
                }

            } catch (RuntimeException ex) {
                throw new SAXException(ex);
            }
            return sb.toString();
        }

        protected final Label getLabel(final Object label) {
            Label lbl = labels.get(label);
            if (lbl == null) {
                lbl = new Label();
                labels.put(label, lbl);
            }
            return lbl;
        }

        // TODO verify move to stack
        protected final MethodVisitor getCodeVisitor() {
            return (MethodVisitor) peek();
        }

        protected final int getAccess(final String s) {
            int access = 0;
            if (s.indexOf("public") != -1) {
                access |= ACC_PUBLIC;
            }
            if (s.indexOf("private") != -1) {
                access |= ACC_PRIVATE;
            }
            if (s.indexOf("protected") != -1) {
                access |= ACC_PROTECTED;
            }
            if (s.indexOf("static") != -1) {
                access |= ACC_STATIC;
            }
            if (s.indexOf("final") != -1) {
                access |= ACC_FINAL;
            }
            if (s.indexOf("super") != -1) {
                access |= ACC_SUPER;
            }
            if (s.indexOf("synchronized") != -1) {
                access |= ACC_SYNCHRONIZED;
            }
            if (s.indexOf("volatile") != -1) {
                access |= ACC_VOLATILE;
            }
            if (s.indexOf("bridge") != -1) {
                access |= ACC_BRIDGE;
            }
            if (s.indexOf("varargs") != -1) {
                access |= ACC_VARARGS;
            }
            if (s.indexOf("transient") != -1) {
                access |= ACC_TRANSIENT;
            }
            if (s.indexOf("native") != -1) {
                access |= ACC_NATIVE;
            }
            if (s.indexOf("interface") != -1) {
                access |= ACC_INTERFACE;
            }
            if (s.indexOf("abstract") != -1) {
                access |= ACC_ABSTRACT;
            }
            if (s.indexOf("strict") != -1) {
                access |= ACC_STRICT;
            }
            if (s.indexOf("synthetic") != -1) {
                access |= ACC_SYNTHETIC;
            }
            if (s.indexOf("annotation") != -1) {
                access |= ACC_ANNOTATION;
            }
            if (s.indexOf("enum") != -1) {
                access |= ACC_ENUM;
            }
            if (s.indexOf("deprecated") != -1) {
                access |= ACC_DEPRECATED;
            }
            if (s.indexOf("mandated") != -1) {
                access |= ACC_MANDATED;
            }
            return access;
        }
    }

    ClassRule
/**
     * ClassRule
     */
    final class ClassRule extends Rule {

        @Override
        public final void begin(final String name, final Attributes attrs) {
            int major = Integer.parseInt(attrs.getValue("major"));
            int minor = Integer.parseInt(attrs.getValue("minor"));
            HashMap<String, Object> vals = new HashMap<String, Object>();
            vals.put("version", minor << 16 | major);
            vals.put("access", attrs.getValue("access"));
            vals.put("name", attrs.getValue("name"));
            vals.put("parent", attrs.getValue("parent"));
            vals.put("source", attrs.getValue("source"));
            vals.put("signature", attrs.getValue("signature"));
            vals.put("interfaces", new ArrayList<String>());
            push(vals);
            // values will be extracted in InterfacesRule.end();
        }
    }

    final class SourceRule extends Rule {

        @Override
        public void begin(final String name, final Attributes attrs) {
            String file = attrs.getValue("file");
            String debug = attrs.getValue("debug");
            cv.visitSource(file, debug);
        }
    }

    InterfaceRule
/**
     * InterfaceRule
     */
    final class InterfaceRule extends Rule {

        @Override
        @SuppressWarnings("unchecked")
        public final void begin(final String name, final Attributes attrs) {
            ((ArrayList<String>) ((HashMap<?, ?>) peek()).get("interfaces"))
                    .add(attrs.getValue("name"));
        }
    }

    InterfacesRule
/**
     * InterfacesRule
     */
    final class InterfacesRule extends Rule {

        @Override
        public final void end(final String element) {
            HashMap<?, ?> vals = (HashMap<?, ?>) pop();
            int version = ((Integer) vals.get("version")).intValue();
            int access = getAccess((String) vals.get("access"));
            String name = (String) vals.get("name");
            String signature = (String) vals.get("signature");
            String parent = (String) vals.get("parent");
            ArrayList<?> infs = (ArrayList<?>) vals.get("interfaces");
            String[] interfaces = infs.toArray(new String[infs.size()]);
            cv.visit(version, access, name, signature, parent, interfaces);
            push(cv);
        }
    }

    OuterClassRule
/**
     * OuterClassRule
     */
    final class OuterClassRule extends Rule {

        @Override
        public final void begin(final String element, final Attributes attrs) {
            String owner = attrs.getValue("owner");
            String name = attrs.getValue("name");
            String desc = attrs.getValue("desc");
            cv.visitOuterClass(owner, name, desc);
        }
    }

    InnerClassRule
/**
     * InnerClassRule
     */
    final class InnerClassRule extends Rule {

        @Override
        public final void begin(final String element, final Attributes attrs) {
            int access = getAccess(attrs.getValue("access"));
            String name = attrs.getValue("name");
            String outerName = attrs.getValue("outerName");
            String innerName = attrs.getValue("innerName");
            cv.visitInnerClass(name, outerName, innerName, access);
        }
    }

    FieldRule
/**
     * FieldRule
     */
    final class FieldRule extends Rule {

        @Override
        public final void begin(final String element, final Attributes attrs)
                throws SAXException {
            int access = getAccess(attrs.getValue("access"));
            String name = attrs.getValue("name");
            String signature = attrs.getValue("signature");
            String desc = attrs.getValue("desc");
            Object value = getValue(desc, attrs.getValue("value"));
            push(cv.visitField(access, name, desc, signature, value));
        }

        @Override
        public void end(final String name) {
            ((FieldVisitor) pop()).visitEnd();
        }
    }

    MethodRule
/**
     * MethodRule
     */
    final class MethodRule extends Rule {

        @Override
        public final void begin(final String name, final Attributes attrs) {
            labels = new HashMap<Object, Label>();
            HashMap<String, Object> vals = new HashMap<String, Object>();
            vals.put("access", attrs.getValue("access"));
            vals.put("name", attrs.getValue("name"));
            vals.put("desc", attrs.getValue("desc"));
            vals.put("signature", attrs.getValue("signature"));
            vals.put("exceptions", new ArrayList<String>());
            push(vals);
            // values will be extracted in ExceptionsRule.end();
        }

        @Override
        public final void end(final String name) {
            ((MethodVisitor) pop()).visitEnd();
            labels = null;
        }
    }

    ExceptionRule
/**
     * ExceptionRule
     */
    final class ExceptionRule extends Rule {

        @Override
        @SuppressWarnings("unchecked")
        public final void begin(final String name, final Attributes attrs) {
            ((ArrayList<String>) ((HashMap<?, ?>) peek()).get("exceptions"))
                    .add(attrs.getValue("name"));
        }
    }

    ExceptionsRule
/**
     * ExceptionsRule
     */
    final class ExceptionsRule extends Rule {

        @Override
        public final void end(final String element) {
            HashMap<?, ?> vals = (HashMap<?, ?>) pop();
            int access = getAccess((String) vals.get("access"));
            String name = (String) vals.get("name");
            String desc = (String) vals.get("desc");
            String signature = (String) vals.get("signature");
            ArrayList<?> excs = (ArrayList<?>) vals.get("exceptions");
            String[] exceptions = excs.toArray(new String[excs.size()]);

            push(cv.visitMethod(access, name, desc, signature, exceptions));
        }
    }

    MethodParameterRule
/**
     * MethodParameterRule
     */
    final class MethodParameterRule extends Rule {
        @Override
        public void begin(final String nm, final Attributes attrs) {
            String name = attrs.getValue("name");
            int access = getAccess(attrs.getValue("access"));
            getCodeVisitor().visitParameter(name, access);
        }
    }

    TableSwitchRule
/**
     * TableSwitchRule
     */
    final class TableSwitchRule extends Rule {

        @Override
        public final void begin(final String name, final Attributes attrs) {
            HashMap<String, Object> vals = new HashMap<String, Object>();
            vals.put("min", attrs.getValue("min"));
            vals.put("max", attrs.getValue("max"));
            vals.put("dflt", attrs.getValue("dflt"));
            vals.put("labels", new ArrayList<String>());
            push(vals);
        }

        @Override
        public final void end(final String name) {
            HashMap<?, ?> vals = (HashMap<?, ?>) pop();
            int min = Integer.parseInt((String) vals.get("min"));
            int max = Integer.parseInt((String) vals.get("max"));
            Label dflt = getLabel(vals.get("dflt"));
            ArrayList<?> lbls = (ArrayList<?>) vals.get("labels");
            Label[] labels = lbls.toArray(new Label[lbls.size()]);
            getCodeVisitor().visitTableSwitchInsn(min, max, dflt, labels);
        }
    }

    TableSwitchLabelRule
/**
     * TableSwitchLabelRule
     */
    final class TableSwitchLabelRule extends Rule {

        @Override
        @SuppressWarnings("unchecked")
        public final void begin(final String name, final Attributes attrs) {
            ((ArrayList<Label>) ((HashMap<?, ?>) peek()).get("labels"))
                    .add(getLabel(attrs.getValue("name")));
        }
    }

    LookupSwitchRule
/**
     * LookupSwitchRule
     */
    final class LookupSwitchRule extends Rule {

        @Override
        public final void begin(final String name, final Attributes attrs) {
            HashMap<String, Object> vals = new HashMap<String, Object>();
            vals.put("dflt", attrs.getValue("dflt"));
            vals.put("labels", new ArrayList<Label>());
            vals.put("keys", new ArrayList<String>());
            push(vals);
        }

        @Override
        public final void end(final String name) {
            HashMap<?, ?> vals = (HashMap<?, ?>) pop();
            Label dflt = getLabel(vals.get("dflt"));
            @SuppressWarnings("unchecked")
            ArrayList<String> keyList = (ArrayList<String>) vals.get("keys");
            ArrayList<?> lbls = (ArrayList<?>) vals.get("labels");
            Label[] labels = lbls.toArray(new Label[lbls.size()]);
            int[] keys = new int[keyList.size()];
            for (int i = 0; i < keys.length; i++) {
                keys[i] = Integer.parseInt(keyList.get(i));
            }
            getCodeVisitor().visitLookupSwitchInsn(dflt, keys, labels);
        }
    }

    LookupSwitchLabelRule
/**
     * LookupSwitchLabelRule
     */
    final class LookupSwitchLabelRule extends Rule {

        @Override
        @SuppressWarnings("unchecked")
        public final void begin(final String name, final Attributes attrs) {
            HashMap<?, ?> vals = (HashMap<?, ?>) peek();
            ((ArrayList<Label>) vals.get("labels")).add(getLabel(attrs
                    .getValue("name")));
            ((ArrayList<String>) vals.get("keys")).add(attrs.getValue("key"));
        }
    }

    FrameRule
/**
     * FrameRule
     */
    final class FrameRule extends Rule {

        @Override
        public void begin(final String name, final Attributes attrs) {
            HashMap<String, Object> typeLists = new HashMap<String, Object>();
            typeLists.put("local", new ArrayList<Object>());
            typeLists.put("stack", new ArrayList<Object>());
            push(attrs.getValue("type"));
            push(attrs.getValue("count") == null ? "0" : attrs
                    .getValue("count"));
            push(typeLists);
        }

        @Override
        public void end(final String name) {
            HashMap<?, ?> typeLists = (HashMap<?, ?>) pop();
            ArrayList<?> locals = (ArrayList<?>) typeLists.get("local");
            int nLocal = locals.size();
            Object[] local = locals.toArray();
            ArrayList<?> stacks = (ArrayList<?>) typeLists.get("stack");
            int nStack = stacks.size();
            Object[] stack = stacks.toArray();
            String count = (String) pop();
            String type = (String) pop();
            if ("NEW".equals(type)) {
                getCodeVisitor()
                        .visitFrame(F_NEW, nLocal, local, nStack, stack);
            } else if ("FULL".equals(type)) {
                getCodeVisitor().visitFrame(F_FULL, nLocal, local, nStack,
                        stack);
            } else if ("APPEND".equals(type)) {
                getCodeVisitor().visitFrame(F_APPEND, nLocal, local, 0, null);
            } else if ("CHOP".equals(type)) {
                getCodeVisitor().visitFrame(F_CHOP, Integer.parseInt(count),
                        null, 0, null);
            } else if ("SAME".equals(type)) {
                getCodeVisitor().visitFrame(F_SAME, 0, null, 0, null);
            } else if ("SAME1".equals(type)) {
                getCodeVisitor().visitFrame(F_SAME1, 0, null, nStack, stack);
            }
        }
    }

    final class FrameTypeRule extends Rule {

        @Override
        public void begin(final String name, final Attributes attrs) {
            @SuppressWarnings("unchecked")
            ArrayList<Object> types = (ArrayList<Object>) ((HashMap<?, ?>) peek())
                    .get(name);
            String type = attrs.getValue("type");
            if ("uninitialized".equals(type)) {
                types.add(getLabel(attrs.getValue("label")));
            } else {
                Integer t = TYPES.get(type);
                if (t == null) {
                    types.add(type);
                } else {
                    types.add(t);
                }
            }
        }
    }

    LabelRule
/**
     * LabelRule
     */
    final class LabelRule extends Rule {

        @Override
        public final void begin(final String name, final Attributes attrs) {
            getCodeVisitor().visitLabel(getLabel(attrs.getValue("name")));
        }
    }

    TryCatchRule
/**
     * TryCatchRule
     */
    final class TryCatchRule extends Rule {

        @Override
        public final void begin(final String name, final Attributes attrs) {
            Label start = getLabel(attrs.getValue("start"));
            Label end = getLabel(attrs.getValue("end"));
            Label handler = getLabel(attrs.getValue("handler"));
            String type = attrs.getValue("type");
            getCodeVisitor().visitTryCatchBlock(start, end, handler, type);
        }
    }

    LineNumberRule
/**
     * LineNumberRule
     */
    final class LineNumberRule extends Rule {

        @Override
        public final void begin(final String name, final Attributes attrs) {
            int line = Integer.parseInt(attrs.getValue("line"));
            Label start = getLabel(attrs.getValue("start"));
            getCodeVisitor().visitLineNumber(line, start);
        }
    }

    LocalVarRule
/**
     * LocalVarRule
     */
    final class LocalVarRule extends Rule {

        @Override
        public final void begin(final String element, final Attributes attrs) {
            String name = attrs.getValue("name");
            String desc = attrs.getValue("desc");
            String signature = attrs.getValue("signature");
            Label start = getLabel(attrs.getValue("start"));
            Label end = getLabel(attrs.getValue("end"));
            int var = Integer.parseInt(attrs.getValue("var"));
            getCodeVisitor().visitLocalVariable(name, desc, signature, start,
                    end, var);
        }
    }

    InvokeDynamicRule
/**
     * InvokeDynamicRule
     */
    final class InvokeDynamicRule extends Rule {
        @Override
        public final void begin(final String element, final Attributes attrs)
                throws SAXException {
            push(attrs.getValue("name"));
            push(attrs.getValue("desc"));
            push(decodeHandle(attrs.getValue("bsm")));
            push(new ArrayList<Object>());
        }

        @Override
        public final void end(final String element) {
            ArrayList<?> bsmArgs = (ArrayList<?>) pop();
            Handle bsm = (Handle) pop();
            String desc = (String) pop();
            String name = (String) pop();
            getCodeVisitor().visitInvokeDynamicInsn(name, desc, bsm,
                    bsmArgs.toArray());
        }
    }

    InvokeDynamicBsmArgumentsRule
/**
     * InvokeDynamicBsmArgumentsRule
     */
    final class InvokeDynamicBsmArgumentsRule extends Rule {
        @Override
        public final void begin(final String element, final Attributes attrs)
                throws SAXException {
            @SuppressWarnings("unchecked")
            ArrayList<Object> bsmArgs = (ArrayList<Object>) peek();
            bsmArgs.add(getValue(attrs.getValue("desc"), attrs.getValue("cst")));
        }
    }

    OpcodesRule
/**
     * OpcodesRule
     */
    final class OpcodesRule extends Rule {

        // public boolean match( String match, String element) {
        // return match.startsWith( path) && OPCODES.containsKey( element);
        // }

        @Override
        public final void begin(final String element, final Attributes attrs)
                throws SAXException {
            Opcode o = OPCODES.get(element);
            if (o == null) {
                throw new SAXException("Invalid element: " + element + " at "
                        + match);
            }

            switch (o.type) {
            case OpcodeGroup.INSN:
                getCodeVisitor().visitInsn(o.opcode);
                break;

            case OpcodeGroup.INSN_FIELD:
                getCodeVisitor().visitFieldInsn(o.opcode,
                        attrs.getValue("owner"), attrs.getValue("name"),
                        attrs.getValue("desc"));
                break;

            case OpcodeGroup.INSN_INT:
                getCodeVisitor().visitIntInsn(o.opcode,
                        Integer.parseInt(attrs.getValue("value")));
                break;

            case OpcodeGroup.INSN_JUMP:
                getCodeVisitor().visitJumpInsn(o.opcode,
                        getLabel(attrs.getValue("label")));
                break;

            case OpcodeGroup.INSN_METHOD:
                getCodeVisitor().visitMethodInsn(o.opcode,
                        attrs.getValue("owner"), attrs.getValue("name"),
                        attrs.getValue("desc"),
                        attrs.getValue("itf").equals("true"));
                break;

            case OpcodeGroup.INSN_TYPE:
                getCodeVisitor()
                        .visitTypeInsn(o.opcode, attrs.getValue("desc"));
                break;

            case OpcodeGroup.INSN_VAR:
                getCodeVisitor().visitVarInsn(o.opcode,
                        Integer.parseInt(attrs.getValue("var")));
                break;

            case OpcodeGroup.INSN_IINC:
                getCodeVisitor().visitIincInsn(
                        Integer.parseInt(attrs.getValue("var")),
                        Integer.parseInt(attrs.getValue("inc")));
                break;

            case OpcodeGroup.INSN_LDC:
                getCodeVisitor()
                        .visitLdcInsn(
                                getValue(attrs.getValue("desc"),
                                        attrs.getValue("cst")));
                break;

            case OpcodeGroup.INSN_MULTIANEWARRAY:
                getCodeVisitor().visitMultiANewArrayInsn(
                        attrs.getValue("desc"),
                        Integer.parseInt(attrs.getValue("dims")));
                break;

            default:
                throw new Error("Internal error");

            }
        }
    }

    MaxRule
/**
     * MaxRule
     */
    final class MaxRule extends Rule {

        @Override
        public final void begin(final String element, final Attributes attrs) {
            int maxStack = Integer.parseInt(attrs.getValue("maxStack"));
            int maxLocals = Integer.parseInt(attrs.getValue("maxLocals"));
            getCodeVisitor().visitMaxs(maxStack, maxLocals);
        }
    }

    final class AnnotationRule extends Rule {

        @Override
        public void begin(final String name, final Attributes attrs) {
            String desc = attrs.getValue("desc");
            boolean visible = Boolean.valueOf(attrs.getValue("visible"))
                    .booleanValue();

            Object v = peek();
            if (v instanceof ClassVisitor) {
                push(((ClassVisitor) v).visitAnnotation(desc, visible));
            } else if (v instanceof FieldVisitor) {
                push(((FieldVisitor) v).visitAnnotation(desc, visible));
            } else if (v instanceof MethodVisitor) {
                push(((MethodVisitor) v).visitAnnotation(desc, visible));
            }
        }

        @Override
        public void end(final String name) {
            AnnotationVisitor av = (AnnotationVisitor) pop();
            if (av != null) {
                av.visitEnd();
            }
        }
    }

    final class TypeAnnotationRule extends Rule {

        @Override
        public void begin(final String name, final Attributes attrs) {
            String desc = attrs.getValue("desc");
            boolean visible = Boolean.valueOf(attrs.getValue("visible"))
                    .booleanValue();
            int typeRef = Integer.parseInt(attrs.getValue("typeRef"));
            TypePath typePath = TypePath.fromString(attrs.getValue("typePath"));

            Object v = peek();
            if (v instanceof ClassVisitor) {
                push(((ClassVisitor) v).visitTypeAnnotation(typeRef, typePath,
                        desc, visible));
            } else if (v instanceof FieldVisitor) {
                push(((FieldVisitor) v).visitTypeAnnotation(typeRef, typePath,
                        desc, visible));
            } else if (v instanceof MethodVisitor) {
                push(((MethodVisitor) v).visitTypeAnnotation(typeRef, typePath,
                        desc, visible));
            }
        }

        @Override
        public void end(final String name) {
            AnnotationVisitor av = (AnnotationVisitor) pop();
            if (av != null) {
                av.visitEnd();
            }
        }
    }

    final class AnnotationParameterRule extends Rule {

        @Override
        public void begin(final String name, final Attributes attrs) {
            int parameter = Integer.parseInt(attrs.getValue("parameter"));
            String desc = attrs.getValue("desc");
            boolean visible = Boolean.valueOf(attrs.getValue("visible"))
                    .booleanValue();

            push(((MethodVisitor) peek()).visitParameterAnnotation(parameter,
                    desc, visible));
        }

        @Override
        public void end(final String name) {
            AnnotationVisitor av = (AnnotationVisitor) pop();
            if (av != null) {
                av.visitEnd();
            }
        }
    }

    final class InsnAnnotationRule extends Rule {

        @Override
        public void begin(final String name, final Attributes attrs) {
            String desc = attrs.getValue("desc");
            boolean visible = Boolean.valueOf(attrs.getValue("visible"))
                    .booleanValue();
            int typeRef = Integer.parseInt(attrs.getValue("typeRef"));
            TypePath typePath = TypePath.fromString(attrs.getValue("typePath"));
            push(((MethodVisitor) peek()).visitInsnAnnotation(typeRef,
                    typePath, desc, visible));
        }

        @Override
        public void end(final String name) {
            AnnotationVisitor av = (AnnotationVisitor) pop();
            if (av != null) {
                av.visitEnd();
            }
        }
    }

    final class TryCatchAnnotationRule extends Rule {

        @Override
        public void begin(final String name, final Attributes attrs) {
            String desc = attrs.getValue("desc");
            boolean visible = Boolean.valueOf(attrs.getValue("visible"))
                    .booleanValue();
            int typeRef = Integer.parseInt(attrs.getValue("typeRef"));
            TypePath typePath = TypePath.fromString(attrs.getValue("typePath"));
            push(((MethodVisitor) peek()).visitTryCatchAnnotation(typeRef,
                    typePath, desc, visible));
        }

        @Override
        public void end(final String name) {
            AnnotationVisitor av = (AnnotationVisitor) pop();
            if (av != null) {
                av.visitEnd();
            }
        }
    }

    final class LocalVariableAnnotationRule extends Rule {

        @Override
        public void begin(final String name, final Attributes attrs) {
            String desc = attrs.getValue("desc");
            boolean visible = Boolean.valueOf(attrs.getValue("visible"))
                    .booleanValue();
            int typeRef = Integer.parseInt(attrs.getValue("typeRef"));
            TypePath typePath = TypePath.fromString(attrs.getValue("typePath"));
            String[] s = attrs.getValue("start").split(" ");
            Label[] start = new Label[s.length];
            for (int i = 0; i < start.length; ++i) {
                start[i] = getLabel(s[i]);
            }
            String[] e = attrs.getValue("end").split(" ");
            Label[] end = new Label[e.length];
            for (int i = 0; i < end.length; ++i) {
                end[i] = getLabel(e[i]);
            }
            String[] v = attrs.getValue("index").split(" ");
            int[] index = new int[v.length];
            for (int i = 0; i < index.length; ++i) {
                index[i] = Integer.parseInt(v[i]);
            }
            push(((MethodVisitor) peek()).visitLocalVariableAnnotation(typeRef,
                    typePath, start, end, index, desc, visible));
        }

        @Override
        public void end(final String name) {
            AnnotationVisitor av = (AnnotationVisitor) pop();
            if (av != null) {
                av.visitEnd();
            }
        }
    }

    final class AnnotationValueRule extends Rule {

        @Override
        public void begin(final String nm, final Attributes attrs)
                throws SAXException {
            AnnotationVisitor av = (AnnotationVisitor) peek();
            if (av != null) {
                av.visit(
                        attrs.getValue("name"),
                        getValue(attrs.getValue("desc"),
                                attrs.getValue("value")));
            }
        }
    }

    final class AnnotationValueEnumRule extends Rule {

        @Override
        public void begin(final String nm, final Attributes attrs) {
            AnnotationVisitor av = (AnnotationVisitor) peek();
            if (av != null) {
                av.visitEnum(attrs.getValue("name"), attrs.getValue("desc"),
                        attrs.getValue("value"));
            }
        }
    }

    final class AnnotationValueAnnotationRule extends Rule {

        @Override
        public void begin(final String nm, final Attributes attrs) {
            AnnotationVisitor av = (AnnotationVisitor) peek();
            push(av == null ? null : av.visitAnnotation(attrs.getValue("name"),
                    attrs.getValue("desc")));
        }

        @Override
        public void end(final String name) {
            AnnotationVisitor av = (AnnotationVisitor) pop();
            if (av != null) {
                av.visitEnd();
            }
        }
    }

    final class AnnotationValueArrayRule extends Rule {

        @Override
        public void begin(final String nm, final Attributes attrs) {
            AnnotationVisitor av = (AnnotationVisitor) peek();
            push(av == null ? null : av.visitArray(attrs.getValue("name")));
        }

        @Override
        public void end(final String name) {
            AnnotationVisitor av = (AnnotationVisitor) pop();
            if (av != null) {
                av.visitEnd();
            }
        }
    }

    final class AnnotationDefaultRule extends Rule {

        @Override
        public void begin(final String nm, final Attributes attrs) {
            MethodVisitor av = (MethodVisitor) peek();
            push(av == null ? null : av.visitAnnotationDefault());
        }

        @Override
        public void end(final String name) {
            AnnotationVisitor av = (AnnotationVisitor) pop();
            if (av != null) {
                av.visitEnd();
            }
        }
    }

    Opcode
/**
     * Opcode
     */
    static final class Opcode {

        public final int opcode;

        public final int type;

        Opcode(final int opcode, final int type) {
            this.opcode = opcode;
            this.type = type;
        }
    }
}
Params:	ns – - The Namespace URI, or the empty string if the element has no Namespace URI or if Namespace processing is not being performed. lName – - The local name (without prefix), or the empty string if Namespace processing is not being performed. qName – - The qualified XML 1.0 name (with prefix), or the empty string if qualified names are not available.
Throws:	SAXException – if a parsing error is to be reported
/

org.ow2.asm/ asm-util/ 5.2/ org/objectweb/asm/xml/ASMContentHandler.java
