| /* |
| * reserved comment block |
| * DO NOT REMOVE OR ALTER! |
| */ |
| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You under the Apache License, Version 2.0 |
| * (the "License"); you may not use this file except in compliance with |
| * the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package com.sun.org.apache.bcel.internal.classfile; |
| |
| import java.io.DataInput; |
| import java.io.DataOutputStream; |
| import java.io.IOException; |
| |
| import com.sun.org.apache.bcel.internal.Const; |
| |
| /** |
| * This class is derived from <em>Attribute</em> and declares this class as |
| * `synthetic', i.e., it needs special handling. The JVM specification |
| * states "A class member that does not appear in the source code must be |
| * marked using a Synthetic attribute." It may appear in the ClassFile |
| * attribute table, a field_info table or a method_info table. This class |
| * is intended to be instantiated from the |
| * <em>Attribute.readAttribute()</em> method. |
| * |
| * @see Attribute |
| */ |
| public final class Synthetic extends Attribute { |
| |
| private byte[] bytes; |
| |
| |
| /** |
| * Initialize from another object. Note that both objects use the same |
| * references (shallow copy). Use copy() for a physical copy. |
| */ |
| public Synthetic(final Synthetic c) { |
| this(c.getNameIndex(), c.getLength(), c.getBytes(), c.getConstantPool()); |
| } |
| |
| |
| /** |
| * @param name_index Index in constant pool to CONSTANT_Utf8, which |
| * should represent the string "Synthetic". |
| * @param length Content length in bytes - should be zero. |
| * @param bytes Attribute contents |
| * @param constant_pool The constant pool this attribute is associated |
| * with. |
| */ |
| public Synthetic(final int name_index, final int length, final byte[] bytes, final ConstantPool constant_pool) { |
| super(Const.ATTR_SYNTHETIC, name_index, length, constant_pool); |
| this.bytes = bytes; |
| } |
| |
| |
| /** |
| * Construct object from input stream. |
| * |
| * @param name_index Index in constant pool to CONSTANT_Utf8 |
| * @param length Content length in bytes |
| * @param input Input stream |
| * @param constant_pool Array of constants |
| * @throws IOException |
| */ |
| Synthetic(final int name_index, final int length, final DataInput input, final ConstantPool constant_pool) |
| throws IOException { |
| this(name_index, length, (byte[]) null, constant_pool); |
| if (length > 0) { |
| bytes = new byte[length]; |
| input.readFully(bytes); |
| println("Synthetic attribute with length > 0"); |
| } |
| } |
| |
| |
| /** |
| * Called by objects that are traversing the nodes of the tree implicitely |
| * defined by the contents of a Java class. I.e., the hierarchy of methods, |
| * fields, attributes, etc. spawns a tree of objects. |
| * |
| * @param v Visitor object |
| */ |
| @Override |
| public void accept( final Visitor v ) { |
| v.visitSynthetic(this); |
| } |
| |
| |
| /** |
| * Dump source file attribute to file stream in binary format. |
| * |
| * @param file Output file stream |
| * @throws IOException |
| */ |
| @Override |
| public void dump( final DataOutputStream file ) throws IOException { |
| super.dump(file); |
| if (super.getLength() > 0) { |
| file.write(bytes, 0, super.getLength()); |
| } |
| } |
| |
| |
| /** |
| * @return data bytes. |
| */ |
| public byte[] getBytes() { |
| return bytes; |
| } |
| |
| |
| /** |
| * @param bytes |
| */ |
| public void setBytes( final byte[] bytes ) { |
| this.bytes = bytes; |
| } |
| |
| |
| /** |
| * @return String representation. |
| */ |
| @Override |
| public String toString() { |
| final StringBuilder buf = new StringBuilder("Synthetic"); |
| if (super.getLength() > 0) { |
| buf.append(" ").append(Utility.toHexString(bytes)); |
| } |
| return buf.toString(); |
| } |
| |
| |
| /** |
| * @return deep copy of this attribute |
| */ |
| @Override |
| public Attribute copy( final ConstantPool _constant_pool ) { |
| final Synthetic c = (Synthetic) clone(); |
| if (bytes != null) { |
| c.bytes = new byte[bytes.length]; |
| System.arraycopy(bytes, 0, c.bytes, 0, bytes.length); |
| } |
| c.setConstantPool(_constant_pool); |
| return c; |
| } |
| } |