/***

* 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 org.objectweb.asm;

/**

* A {@link ClassVisitor} that generates classes in bytecode form. More

* precisely this visitor generates a byte array conforming to the Java class

* file format. It can be used alone, to generate a Java class "from scratch",

* or with one or more {@link ClassReader ClassReader} and adapter class visitor

* to generate a modified class from one or more existing Java classes.

*

* @author Eric Bruneton

*/

public class ClassWriter extends ClassVisitor {

/**

* Flag to automatically compute the maximum stack size and the maximum

* number of local variables of methods. If this flag is set, then the

* arguments of the {@link MethodVisitor#visitMaxs visitMaxs} method of the

* {@link MethodVisitor} returned by the {@link #visitMethod visitMethod}

* method will be ignored, and computed automatically from the signature and

* the bytecode of each method.

*

* @see #ClassWriter(int)

*/

public static final int COMPUTE_MAXS = 1;

/**

* Flag to automatically compute the stack map frames of methods from

* scratch. If this flag is set, then the calls to the

* {@link MethodVisitor#visitFrame} method are ignored, and the stack map

* frames are recomputed from the methods bytecode. The arguments of the

* {@link MethodVisitor#visitMaxs visitMaxs} method are also ignored and

* recomputed from the bytecode. In other words, computeFrames implies

* computeMaxs.

*

* @see #ClassWriter(int)

*/

public static final int COMPUTE_FRAMES = 2;

/**

* Pseudo access flag to distinguish between the synthetic attribute and the

* synthetic access flag.

*/

static final int ACC_SYNTHETIC_ATTRIBUTE = 0x40000;

/**

* Factor to convert from ACC_SYNTHETIC_ATTRIBUTE to Opcode.ACC_SYNTHETIC.

*/

static final int TO_ACC_SYNTHETIC = ACC_SYNTHETIC_ATTRIBUTE

/ Opcodes.ACC_SYNTHETIC;

/**

* The type of instructions without any argument.

*/

static final int NOARG_INSN = 0;

/**

* The type of instructions with an signed byte argument.

*/

static final int SBYTE_INSN = 1;

/**

* The type of instructions with an signed short argument.

*/

static final int SHORT_INSN = 2;

/**

* The type of instructions with a local variable index argument.

*/

static final int VAR_INSN = 3;

/**

* The type of instructions with an implicit local variable index argument.

*/

static final int IMPLVAR_INSN = 4;

/**

* The type of instructions with a type descriptor argument.

*/

static final int TYPE_INSN = 5;

/**

* The type of field and method invocations instructions.

*/

static final int FIELDORMETH_INSN = 6;

/**

* The type of the INVOKEINTERFACE/INVOKEDYNAMIC instruction.

*/

static final int ITFMETH_INSN = 7;

/**

* The type of the INVOKEDYNAMIC instruction.

*/

static final int INDYMETH_INSN = 8;

/**

* The type of instructions with a 2 bytes bytecode offset label.

*/

static final int LABEL_INSN = 9;

/**

* The type of instructions with a 4 bytes bytecode offset label.

*/

static final int LABELW_INSN = 10;

/**

* The type of the LDC instruction.

*/

static final int LDC_INSN = 11;

/**

* The type of the LDC_W and LDC2_W instructions.

*/

static final int LDCW_INSN = 12;

/**

* The type of the IINC instruction.

*/

static final int IINC_INSN = 13;

/**

* The type of the TABLESWITCH instruction.

*/

static final int TABL_INSN = 14;

/**

* The type of the LOOKUPSWITCH instruction.

*/

static final int LOOK_INSN = 15;

/**

* The type of the MULTIANEWARRAY instruction.

*/

static final int MANA_INSN = 16;

/**

* The type of the WIDE instruction.

*/

static final int WIDE_INSN = 17;

/**

* The instruction types of all JVM opcodes.

*/

static final byte[] TYPE;

/**

* The type of CONSTANT_Class constant pool items.

*/

static final int CLASS = 7;

/**

* The type of CONSTANT_Fieldref constant pool items.

*/

static final int FIELD = 9;

/**

* The type of CONSTANT_Methodref constant pool items.

*/

static final int METH = 10;

/**

* The type of CONSTANT_InterfaceMethodref constant pool items.

*/

static final int IMETH = 11;

/**

* The type of CONSTANT_String constant pool items.

*/

static final int STR = 8;

/**

* The type of CONSTANT_Integer constant pool items.

*/

static final int INT = 3;

/**

* The type of CONSTANT_Float constant pool items.

*/

static final int FLOAT = 4;

/**

* The type of CONSTANT_Long constant pool items.

*/

static final int LONG = 5;

/**

* The type of CONSTANT_Double constant pool items.

*/

static final int DOUBLE = 6;

/**

* The type of CONSTANT_NameAndType constant pool items.

*/

static final int NAME_TYPE = 12;

/**

* The type of CONSTANT_Utf8 constant pool items.

*/

static final int UTF8 = 1;

/**

* The type of CONSTANT_MethodType constant pool items.

*/

static final int MTYPE = 16;

/**

* The type of CONSTANT_MethodHandle constant pool items.

*/

static final int HANDLE = 15;

/**

* The type of CONSTANT_InvokeDynamic constant pool items.

*/

static final int INDY = 18;

/**

* The base value for all CONSTANT_MethodHandle constant pool items.

* Internally, ASM store the 9 variations of CONSTANT_MethodHandle into 9

* different items.

*/

static final int HANDLE_BASE = 20;

/**

* Normal type Item stored in the ClassWriter {@link ClassWriter#typeTable},

* instead of the constant pool, in order to avoid clashes with normal

* constant pool items in the ClassWriter constant pool's hash table.

*/

static final int TYPE_NORMAL = 30;

/**

* Uninitialized type Item stored in the ClassWriter

* {@link ClassWriter#typeTable}, instead of the constant pool, in order to

* avoid clashes with normal constant pool items in the ClassWriter constant

* pool's hash table.

*/

static final int TYPE_UNINIT = 31;

/**

* Merged type Item stored in the ClassWriter {@link ClassWriter#typeTable},

* instead of the constant pool, in order to avoid clashes with normal

* constant pool items in the ClassWriter constant pool's hash table.

*/

static final int TYPE_MERGED = 32;

/**

* The type of BootstrapMethods items. These items are stored in a special

* class attribute named BootstrapMethods and not in the constant pool.

*/

static final int BSM = 33;

/**

* The class reader from which this class writer was constructed, if any.

*/

ClassReader cr;

/**

* Minor and major version numbers of the class to be generated.

*/

int version;

/**

* Index of the next item to be added in the constant pool.

*/

int index;

/**

* The constant pool of this class.

*/

final ByteVector pool;

/**

* The constant pool's hash table data.

*/

Item[] items;

/**

* The threshold of the constant pool's hash table.

*/

int threshold;

/**

* A reusable key used to look for items in the {@link #items} hash table.

*/

final Item key;

/**

* A reusable key used to look for items in the {@link #items} hash table.

*/

final Item key2;

/**

* A reusable key used to look for items in the {@link #items} hash table.

*/

final Item key3;

/**

* A reusable key used to look for items in the {@link #items} hash table.

*/

final Item key4;

/**

* A type table used to temporarily store internal names that will not

* necessarily be stored in the constant pool. This type table is used by

* the control flow and data flow analysis algorithm used to compute stack

* map frames from scratch. This array associates to each index <tt>i</tt>

* the Item whose index is <tt>i</tt>. All Item objects stored in this array

* are also stored in the {@link #items} hash table. These two arrays allow

* to retrieve an Item from its index or, conversely, to get the index of an

* Item from its value. Each Item stores an internal name in its

* {@link Item#strVal1} field.

*/

Item[] typeTable;

/**

* Number of elements in the {@link #typeTable} array.

*/

private short typeCount;

/**

* The access flags of this class.

*/

private int access;

/**

* The constant pool item that contains the internal name of this class.

*/

private int name;

/**

* The internal name of this class.

*/

String thisName;

/**

* The constant pool item that contains the signature of this class.

*/

private int signature;

/**

* The constant pool item that contains the internal name of the super class

* of this class.

*/

private int superName;

/**

* Number of interfaces implemented or extended by this class or interface.

*/

private int interfaceCount;

/**

* The interfaces implemented or extended by this class or interface. More

* precisely, this array contains the indexes of the constant pool items

* that contain the internal names of these interfaces.

*/

private int[] interfaces;

/**

* The index of the constant pool item that contains the name of the source

* file from which this class was compiled.

*/

private int sourceFile;

/**

* The SourceDebug attribute of this class.

*/

private ByteVector sourceDebug;

/**

* The constant pool item that contains the name of the enclosing class of

* this class.

*/

private int enclosingMethodOwner;

/**

* The constant pool item that contains the name and descriptor of the

* enclosing method of this class.

*/

private int enclosingMethod;

/**

* The runtime visible annotations of this class.

*/

private AnnotationWriter anns;

/**

* The runtime invisible annotations of this class.

*/

private AnnotationWriter ianns;

/**

* The runtime visible type annotations of this class.

*/

private AnnotationWriter tanns;

/**

* The runtime invisible type annotations of this class.

*/

private AnnotationWriter itanns;

/**

* The non standard attributes of this class.

*/

private Attribute attrs;

/**

* The number of entries in the InnerClasses attribute.

*/

private int innerClassesCount;

/**

* The InnerClasses attribute.

*/

private ByteVector innerClasses;

/**

* The number of entries in the BootstrapMethods attribute.

*/

int bootstrapMethodsCount;

/**

* The BootstrapMethods attribute.

*/

ByteVector bootstrapMethods;

/**

* The fields of this class. These fields are stored in a linked list of

* {@link FieldWriter} objects, linked to each other by their

* {@link FieldWriter#fv} field. This field stores the first element of this

* list.

*/

FieldWriter firstField;

/**

* The fields of this class. These fields are stored in a linked list of

* {@link FieldWriter} objects, linked to each other by their

* {@link FieldWriter#fv} field. This field stores the last element of this

* list.

*/

FieldWriter lastField;

/**

* The methods of this class. These methods are stored in a linked list of

* {@link MethodWriter} objects, linked to each other by their

* {@link MethodWriter#mv} field. This field stores the first element of

* this list.

*/

MethodWriter firstMethod;

/**

* The methods of this class. These methods are stored in a linked list of

* {@link MethodWriter} objects, linked to each other by their

* {@link MethodWriter#mv} field. This field stores the last element of this

* list.

*/

MethodWriter lastMethod;

/**

* <tt>true</tt> if the maximum stack size and number of local variables

* must be automatically computed.

*/

private boolean computeMaxs;

/**

* <tt>true</tt> if the stack map frames must be recomputed from scratch.

*/

private boolean computeFrames;

/**

* <tt>true</tt> if the stack map tables of this class are invalid. The

* {@link MethodWriter#resizeInstructions} method cannot transform existing

* stack map tables, and so produces potentially invalid classes when it is

* executed. In this case the class is reread and rewritten with the

* {@link #COMPUTE_FRAMES} option (the resizeInstructions method can resize

* stack map tables when this option is used).

*/

boolean invalidFrames;

// ------------------------------------------------------------------------

// Static initializer

// ------------------------------------------------------------------------

/**

* Computes the instruction types of JVM opcodes.

*/

static {

int i;

byte[] b = new byte[220];

String s = "AAAAAAAAAAAAAAAABCLMMDDDDDEEEEEEEEEEEEEEEEEEEEAAAAAAAADD"

+ "DDDEEEEEEEEEEEEEEEEEEEEAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA"

+ "AAAAAAAAAAAAAAAAANAAAAAAAAAAAAAAAAAAAAJJJJJJJJJJJJJJJJDOPAA"

+ "AAAAGGGGGGGHIFBFAAFFAARQJJKKJJJJJJJJJJJJJJJJJJ";

for (i = 0; i < b.length; ++i) {

b[i] = (byte) (s.charAt(i) - 'A');

}

TYPE = b;

// code to generate the above string

//

// // SBYTE_INSN instructions

// b[Constants.NEWARRAY] = SBYTE_INSN;

// b[Constants.BIPUSH] = SBYTE_INSN;

//

// // SHORT_INSN instructions

// b[Constants.SIPUSH] = SHORT_INSN;

//

// // (IMPL)VAR_INSN instructions

// b[Constants.RET] = VAR_INSN;

// for (i = Constants.ILOAD; i <= Constants.ALOAD; ++i) {

// b[i] = VAR_INSN;

// }

// for (i = Constants.ISTORE; i <= Constants.ASTORE; ++i) {

// b[i] = VAR_INSN;

// }

// for (i = 26; i <= 45; ++i) { // ILOAD_0 to ALOAD_3

// b[i] = IMPLVAR_INSN;

// }

// for (i = 59; i <= 78; ++i) { // ISTORE_0 to ASTORE_3

// b[i] = IMPLVAR_INSN;

// }

//

// // TYPE_INSN instructions

// b[Constants.NEW] = TYPE_INSN;

// b[Constants.ANEWARRAY] = TYPE_INSN;

// b[Constants.CHECKCAST] = TYPE_INSN;

// b[Constants.INSTANCEOF] = TYPE_INSN;

//

// // (Set)FIELDORMETH_INSN instructions

// for (i = Constants.GETSTATIC; i <= Constants.INVOKESTATIC; ++i) {

// b[i] = FIELDORMETH_INSN;

// }

// b[Constants.INVOKEINTERFACE] = ITFMETH_INSN;

// b[Constants.INVOKEDYNAMIC] = INDYMETH_INSN;

//

// // LABEL(W)_INSN instructions

// for (i = Constants.IFEQ; i <= Constants.JSR; ++i) {

// b[i] = LABEL_INSN;

// }

// b[Constants.IFNULL] = LABEL_INSN;

// b[Constants.IFNONNULL] = LABEL_INSN;

// b[200] = LABELW_INSN; // GOTO_W

// b[201] = LABELW_INSN; // JSR_W

// // temporary opcodes used internally by ASM - see Label and

// MethodWriter

// for (i = 202; i < 220; ++i) {

// b[i] = LABEL_INSN;

// }

//

// // LDC(_W) instructions

// b[Constants.LDC] = LDC_INSN;

// b[19] = LDCW_INSN; // LDC_W

// b[20] = LDCW_INSN; // LDC2_W

//

// // special instructions

// b[Constants.IINC] = IINC_INSN;

// b[Constants.TABLESWITCH] = TABL_INSN;

// b[Constants.LOOKUPSWITCH] = LOOK_INSN;

// b[Constants.MULTIANEWARRAY] = MANA_INSN;

// b[196] = WIDE_INSN; // WIDE

//

// for (i = 0; i < b.length; ++i) {

// System.err.print((char)('A' + b[i]));

// }

// System.err.println();

}

// ------------------------------------------------------------------------

// Constructor

// ------------------------------------------------------------------------

/**

* Constructs a new {@link ClassWriter} object.

*

* @param flags

* option flags that can be used to modify the default behavior

* of this class. See {@link #COMPUTE_MAXS},

* {@link #COMPUTE_FRAMES}.

*/

public ClassWriter(final int flags) {

super(Opcodes.ASM5);

index = 1;

pool = new ByteVector();

items = new Item[256];

threshold = (int) (0.75d * items.length);

key = new Item();

key2 = new Item();

key3 = new Item();

key4 = new Item();

this.computeMaxs = (flags & COMPUTE_MAXS) != 0;

this.computeFrames = (flags & COMPUTE_FRAMES) != 0;

}

/**

* Constructs a new {@link ClassWriter} object and enables optimizations for

* "mostly add" bytecode transformations. These optimizations are the

* following:

*

* <ul>

* <li>The constant pool from the original class is copied as is in the new

* class, which saves time. New constant pool entries will be added at the

* end if necessary, but unused constant pool entries <i>won't be

* removed</i>.</li>

* <li>Methods that are not transformed are copied as is in the new class,

* directly from the original class bytecode (i.e. without emitting visit

* events for all the method instructions), which saves a <i>lot</i> of

* time. Untransformed methods are detected by the fact that the

* {@link ClassReader} receives {@link MethodVisitor} objects that come from

* a {@link ClassWriter} (and not from any other {@link ClassVisitor}

* instance).</li>

* </ul>

*

* @param classReader

* the {@link ClassReader} used to read the original class. It

* will be used to copy the entire constant pool from the

* original class and also to copy other fragments of original

* bytecode where applicable.

* @param flags

* option flags that can be used to modify the default behavior

* of this class. <i>These option flags do not affect methods

* that are copied as is in the new class. This means that the

* maximum stack size nor the stack frames will be computed for

* these methods</i>. See {@link #COMPUTE_MAXS},

* {@link #COMPUTE_FRAMES}.

*/

public ClassWriter(final ClassReader classReader, final int flags) {

this(flags);

classReader.copyPool(this);

this.cr = classReader;

}

// ------------------------------------------------------------------------

// Implementation of the ClassVisitor abstract class

// ------------------------------------------------------------------------

@Override

public final void visit(final int version, final int access,

final String name, final String signature, final String superName,

final String[] interfaces) {

this.version = version;

this.access = access;

this.name = newClass(name);

thisName = name;

if (ClassReader.SIGNATURES && signature != null) {

this.signature = newUTF8(signature);

}

this.superName = superName == null ? 0 : newClass(superName);

if (interfaces != null && interfaces.length > 0) {

interfaceCount = interfaces.length;

this.interfaces = new int[interfaceCount];

for (int i = 0; i < interfaceCount; ++i) {

this.interfaces[i] = newClass(interfaces[i]);

}

}

}

@Override

public final void visitSource(final String file, final String debug) {

if (file != null) {

sourceFile = newUTF8(file);

}

if (debug != null) {

sourceDebug = new ByteVector().encodeUTF8(debug, 0,

Integer.MAX_VALUE);

}

}

@Override

public final void visitOuterClass(final String owner, final String name,

final String desc) {

enclosingMethodOwner = newClass(owner);

if (name != null && desc != null) {

enclosingMethod = newNameType(name, desc);

}

}

@Override

public final AnnotationVisitor visitAnnotation(final String desc,

final boolean visible) {

if (!ClassReader.ANNOTATIONS) {

return null;

}

ByteVector bv = new ByteVector();

// write type, and reserve space for values count

bv.putShort(newUTF8(desc)).putShort(0);

AnnotationWriter aw = new AnnotationWriter(this, true, bv, bv, 2);

if (visible) {

aw.next = anns;

anns = aw;

} else {

aw.next = ianns;

ianns = aw;

}

return aw;

}

@Override

public final AnnotationVisitor visitTypeAnnotation(int typeRef,

TypePath typePath, final String desc, final boolean visible) {

if (!ClassReader.ANNOTATIONS) {

return null;

}

ByteVector bv = new ByteVector();

// write target_type and target_info

AnnotationWriter.putTarget(typeRef, typePath, bv);

// write type, and reserve space for values count

bv.putShort(newUTF8(desc)).putShort(0);

AnnotationWriter aw = new AnnotationWriter(this, true, bv, bv,

bv.length - 2);

if (visible) {

aw.next = tanns;

tanns = aw;

} else {

aw.next = itanns;

itanns = aw;

}

return aw;

}

@Override

public final void visitAttribute(final Attribute attr) {

attr.next = attrs;

attrs = attr;

}

@Override

public final void visitInnerClass(final String name,

final String outerName, final String innerName, final int access) {

if (innerClasses == null) {

innerClasses = new ByteVector();

}

// Sec. 4.7.6 of the JVMS states "Every CONSTANT_Class_info entry in the

// constant_pool table which represents a class or interface C that is

// not a package member must have exactly one corresponding entry in the

// classes array". To avoid duplicates we keep track in the intVal field

// of the Item of each CONSTANT_Class_info entry C whether an inner

// class entry has already been added for C (this field is unused for

// class entries, and changing its value does not change the hashcode

// and equality tests). If so we store the index of this inner class

// entry (plus one) in intVal. This hack allows duplicate detection in

// O(1) time.

Item nameItem = newClassItem(name);

if (nameItem.intVal == 0) {

++innerClassesCount;

innerClasses.putShort(nameItem.index);

innerClasses.putShort(outerName == null ? 0 : newClass(outerName));

innerClasses.putShort(innerName == null ? 0 : newUTF8(innerName));

innerClasses.putShort(access);

nameItem.intVal = innerClassesCount;

} else {

// Compare the inner classes entry nameItem.intVal - 1 with the

// arguments of this method and throw an exception if there is a

// difference?

}

}

@Override

public final FieldVisitor visitField(final int access, final String name,

final String desc, final String signature, final Object value) {

return new FieldWriter(this, access, name, desc, signature, value);

}

@Override

public final MethodVisitor visitMethod(final int access, final String name,

final String desc, final String signature, final String[] exceptions) {

return new MethodWriter(this, access, name, desc, signature,

exceptions, computeMaxs, computeFrames);

}

@Override

public final void visitEnd() {

}

// ------------------------------------------------------------------------

// Other public methods

// ------------------------------------------------------------------------

/**

* Returns the bytecode of the class that was build with this class writer.

*

* @return the bytecode of the class that was build with this class writer.

*/

public byte[] toByteArray() {

if (index > 0xFFFF) {

throw new RuntimeException("Class file too large!");

}

// computes the real size of the bytecode of this class

int size = 24 + 2 * interfaceCount;

int nbFields = 0;

FieldWriter fb = firstField;

while (fb != null) {

++nbFields;

size += fb.getSize();

fb = (FieldWriter) fb.fv;

}

int nbMethods = 0;

MethodWriter mb = firstMethod;

while (mb != null) {

++nbMethods;

size += mb.getSize();

mb = (MethodWriter) mb.mv;

}

int attributeCount = 0;

if (bootstrapMethods != null) {

// we put it as first attribute in order to improve a bit

// ClassReader.copyBootstrapMethods

++attributeCount;

size += 8 + bootstrapMethods.length;

newUTF8("BootstrapMethods");

}

if (ClassReader.SIGNATURES && signature != 0) {

++attributeCount;

size += 8;

newUTF8("Signature");

}

if (sourceFile != 0) {

++attributeCount;

size += 8;

newUTF8("SourceFile");

}

if (sourceDebug != null) {

++attributeCount;

size += sourceDebug.length + 6;

newUTF8("SourceDebugExtension");

}

if (enclosingMethodOwner != 0) {

++attributeCount;

size += 10;

newUTF8("EnclosingMethod");

}

if ((access & Opcodes.ACC_DEPRECATED) != 0) {

++attributeCount;

size += 6;

newUTF8("Deprecated");

}

if ((access & Opcodes.ACC_SYNTHETIC) != 0) {

if ((version & 0xFFFF) < Opcodes.V1_5

|| (access & ACC_SYNTHETIC_ATTRIBUTE) != 0) {

++attributeCount;

size += 6;

newUTF8("Synthetic");

}

}

if (innerClasses != null) {

++attributeCount;

size += 8 + innerClasses.length;

newUTF8("InnerClasses");

}

if (ClassReader.ANNOTATIONS && anns != null) {

++attributeCount;

size += 8 + anns.getSize();

newUTF8("RuntimeVisibleAnnotations");

}

if (ClassReader.ANNOTATIONS && ianns != null) {

++attributeCount;

size += 8 + ianns.getSize();

newUTF8("RuntimeInvisibleAnnotations");

}

if (ClassReader.ANNOTATIONS && tanns != null) {

++attributeCount;

size += 8 + tanns.getSize();

newUTF8("RuntimeVisibleTypeAnnotations");

}

if (ClassReader.ANNOTATIONS && itanns != null) {

++attributeCount;

size += 8 + itanns.getSize();

newUTF8("RuntimeInvisibleTypeAnnotations");

}

if (attrs != null) {

attributeCount += attrs.getCount();

size += attrs.getSize(this, null, 0, -1, -1);

}

size += pool.length;

// allocates a byte vector of this size, in order to avoid unnecessary

// arraycopy operations in the ByteVector.enlarge() method

ByteVector out = new ByteVector(size);

out.putInt(0xCAFEBABE).putInt(version);

out.putShort(index).putByteArray(pool.data, 0, pool.length);

int mask = Opcodes.ACC_DEPRECATED | ACC_SYNTHETIC_ATTRIBUTE

| ((access & ACC_SYNTHETIC_ATTRIBUTE) / TO_ACC_SYNTHETIC);

out.putShort(access & ~mask).putShort(name).putShort(superName);

out.putShort(interfaceCount);

for (int i = 0; i < interfaceCount; ++i) {

out.putShort(interfaces[i]);

}

out.putShort(nbFields);

fb = firstField;

while (fb != null) {

fb.put(out);

fb = (FieldWriter) fb.fv;

}

out.putShort(nbMethods);

mb = firstMethod;

while (mb != null) {

mb.put(out);

mb = (MethodWriter) mb.mv;

}

out.putShort(attributeCount);

if (bootstrapMethods != null) {

out.putShort(newUTF8("BootstrapMethods"));

out.putInt(bootstrapMethods.length + 2).putShort(

bootstrapMethodsCount);

out.putByteArray(bootstrapMethods.data, 0, bootstrapMethods.length);

}

if (ClassReader.SIGNATURES && signature != 0) {

out.putShort(newUTF8("Signature")).putInt(2).putShort(signature);

}

if (sourceFile != 0) {

out.putShort(newUTF8("SourceFile")).putInt(2).putShort(sourceFile);

}

if (sourceDebug != null) {

int len = sourceDebug.length;

out.putShort(newUTF8("SourceDebugExtension")).putInt(len);

out.putByteArray(sourceDebug.data, 0, len);

}

if (enclosingMethodOwner != 0) {

out.putShort(newUTF8("EnclosingMethod")).putInt(4);

out.putShort(enclosingMethodOwner).putShort(enclosingMethod);

}

if ((access & Opcodes.ACC_DEPRECATED) != 0) {

out.putShort(newUTF8("Deprecated")).putInt(0);

}

if ((access & Opcodes.ACC_SYNTHETIC) != 0) {

if ((version & 0xFFFF) < Opcodes.V1_5

|| (access & ACC_SYNTHETIC_ATTRIBUTE) != 0) {

out.putShort(newUTF8("Synthetic")).putInt(0);

}

}

if (innerClasses != null) {

out.putShort(newUTF8("InnerClasses"));

out.putInt(innerClasses.length + 2).putShort(innerClassesCount);

out.putByteArray(innerClasses.data, 0, innerClasses.length);

}

if (ClassReader.ANNOTATIONS && anns != null) {

out.putShort(newUTF8("RuntimeVisibleAnnotations"));

anns.put(out);

}

if (ClassReader.ANNOTATIONS && ianns != null) {

out.putShort(newUTF8("RuntimeInvisibleAnnotations"));

ianns.put(out);

}

if (ClassReader.ANNOTATIONS && tanns != null) {

out.putShort(newUTF8("RuntimeVisibleTypeAnnotations"));

tanns.put(out);

}

if (ClassReader.ANNOTATIONS && itanns != null) {

out.putShort(newUTF8("RuntimeInvisibleTypeAnnotations"));

itanns.put(out);

}

if (attrs != null) {

attrs.put(this, null, 0, -1, -1, out);

}

if (invalidFrames) {

anns = null;

ianns = null;

attrs = null;

innerClassesCount = 0;

innerClasses = null;

bootstrapMethodsCount = 0;

bootstrapMethods = null;

firstField = null;

lastField = null;

firstMethod = null;

lastMethod = null;

computeMaxs = false;

computeFrames = true;

invalidFrames = false;

new ClassReader(out.data).accept(this, ClassReader.SKIP_FRAMES);

return toByteArray();

}

return out.data;

}