277 lines
8.6 KiB
Java
277 lines
8.6 KiB
Java
/***
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* ASM: a very small and fast Java bytecode manipulation framework
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* Copyright (c) 2000-2005 INRIA, France Telecom
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the copyright holders nor the names of its
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* contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
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* THE POSSIBILITY OF SUCH DAMAGE.
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*/
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package org.objectweb.asm;
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/**
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* An {@link FieldVisitor} that generates Java fields in bytecode form.
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*
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* @author Eric Bruneton
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*/
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final class FieldWriter implements FieldVisitor {
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/**
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* Next field writer (see {@link ClassWriter#firstField firstField}).
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*/
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FieldWriter next;
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/**
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* The class writer to which this field must be added.
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*/
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private ClassWriter cw;
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/**
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* Access flags of this field.
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*/
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private int access;
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/**
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* The index of the constant pool item that contains the name of this
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* method.
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*/
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private int name;
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/**
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* The index of the constant pool item that contains the descriptor of this
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* field.
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*/
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private int desc;
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/**
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* The index of the constant pool item that contains the signature of this
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* field.
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*/
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private int signature;
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/**
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* The index of the constant pool item that contains the constant value of
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* this field.
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*/
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private int value;
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/**
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* The runtime visible annotations of this field. May be <tt>null</tt>.
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*/
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private AnnotationWriter anns;
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/**
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* The runtime invisible annotations of this field. May be <tt>null</tt>.
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*/
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private AnnotationWriter ianns;
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/**
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* The non standard attributes of this field. May be <tt>null</tt>.
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*/
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private Attribute attrs;
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// ------------------------------------------------------------------------
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// Constructor
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// ------------------------------------------------------------------------
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/**
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* Constructs a new {@link FieldWriter}.
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*
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* @param cw the class writer to which this field must be added.
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* @param access the field's access flags (see {@link Opcodes}).
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* @param name the field's name.
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* @param desc the field's descriptor (see {@link Type}).
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* @param signature the field's signature. May be <tt>null</tt>.
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* @param value the field's constant value. May be <tt>null</tt>.
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*/
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protected FieldWriter(
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final ClassWriter cw,
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final int access,
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final String name,
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final String desc,
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final String signature,
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final Object value)
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{
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if (cw.firstField == null) {
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cw.firstField = this;
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} else {
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cw.lastField.next = this;
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}
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cw.lastField = this;
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this.cw = cw;
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this.access = access;
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this.name = cw.newUTF8(name);
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this.desc = cw.newUTF8(desc);
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if (signature != null) {
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this.signature = cw.newUTF8(signature);
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}
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if (value != null) {
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this.value = cw.newConstItem(value).index;
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}
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}
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// ------------------------------------------------------------------------
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// Implementation of the FieldVisitor interface
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// ------------------------------------------------------------------------
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public AnnotationVisitor visitAnnotation(
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final String desc,
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final boolean visible)
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{
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ByteVector bv = new ByteVector();
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// write type, and reserve space for values count
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bv.putShort(cw.newUTF8(desc)).putShort(0);
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AnnotationWriter aw = new AnnotationWriter(cw, true, bv, bv, 2);
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if (visible) {
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aw.next = anns;
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anns = aw;
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} else {
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aw.next = ianns;
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ianns = aw;
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}
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return aw;
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}
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public void visitAttribute(final Attribute attr) {
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attr.next = attrs;
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attrs = attr;
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}
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public void visitEnd() {
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}
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// ------------------------------------------------------------------------
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// Utility methods
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// ------------------------------------------------------------------------
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/**
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* Returns the size of this field.
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*
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* @return the size of this field.
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*/
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int getSize() {
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int size = 8;
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if (value != 0) {
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cw.newUTF8("ConstantValue");
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size += 8;
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}
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if ((access & Opcodes.ACC_SYNTHETIC) != 0
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&& (cw.version & 0xffff) < Opcodes.V1_5)
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{
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cw.newUTF8("Synthetic");
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size += 6;
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}
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if ((access & Opcodes.ACC_DEPRECATED) != 0) {
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cw.newUTF8("Deprecated");
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size += 6;
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}
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if (cw.version == Opcodes.V1_4 && (access & Opcodes.ACC_ENUM) != 0) {
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cw.newUTF8("Enum");
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size += 6;
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}
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if (signature != 0) {
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cw.newUTF8("Signature");
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size += 8;
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}
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if (anns != null) {
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cw.newUTF8("RuntimeVisibleAnnotations");
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size += 8 + anns.getSize();
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}
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if (ianns != null) {
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cw.newUTF8("RuntimeInvisibleAnnotations");
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size += 8 + ianns.getSize();
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}
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if (attrs != null) {
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size += attrs.getSize(cw, null, 0, -1, -1);
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}
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return size;
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}
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/**
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* Puts the content of this field into the given byte vector.
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*
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* @param out where the content of this field must be put.
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*/
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void put(final ByteVector out) {
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out.putShort(access).putShort(name).putShort(desc);
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int attributeCount = 0;
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if (value != 0) {
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++attributeCount;
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}
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if ((access & Opcodes.ACC_SYNTHETIC) != 0
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&& (cw.version & 0xffff) < Opcodes.V1_5)
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{
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++attributeCount;
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}
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if ((access & Opcodes.ACC_DEPRECATED) != 0) {
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++attributeCount;
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}
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if (cw.version == Opcodes.V1_4 && (access & Opcodes.ACC_ENUM) != 0) {
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++attributeCount;
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}
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if (signature != 0) {
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++attributeCount;
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}
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if (anns != null) {
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++attributeCount;
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}
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if (ianns != null) {
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++attributeCount;
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}
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if (attrs != null) {
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attributeCount += attrs.getCount();
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}
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out.putShort(attributeCount);
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if (value != 0) {
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out.putShort(cw.newUTF8("ConstantValue"));
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out.putInt(2).putShort(value);
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}
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if ((access & Opcodes.ACC_SYNTHETIC) != 0
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&& (cw.version & 0xffff) < Opcodes.V1_5)
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{
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out.putShort(cw.newUTF8("Synthetic")).putInt(0);
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}
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if ((access & Opcodes.ACC_DEPRECATED) != 0) {
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out.putShort(cw.newUTF8("Deprecated")).putInt(0);
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}
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if (cw.version == Opcodes.V1_4 && (access & Opcodes.ACC_ENUM) != 0) {
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out.putShort(cw.newUTF8("Enum")).putInt(0);
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}
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if (signature != 0) {
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out.putShort(cw.newUTF8("Signature"));
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out.putInt(2).putShort(signature);
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}
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if (anns != null) {
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out.putShort(cw.newUTF8("RuntimeVisibleAnnotations"));
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anns.put(out);
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}
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if (ianns != null) {
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out.putShort(cw.newUTF8("RuntimeInvisibleAnnotations"));
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ianns.put(out);
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}
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if (attrs != null) {
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attrs.put(cw, null, 0, -1, -1, out);
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}
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}
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}
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