001/*
002 *  Licensed to the Apache Software Foundation (ASF) under one or more
003 *  contributor license agreements.  See the NOTICE file distributed with
004 *  this work for additional information regarding copyright ownership.
005 *  The ASF licenses this file to You under the Apache License, Version 2.0
006 *  (the "License"); you may not use this file except in compliance with
007 *  the License.  You may obtain a copy of the License at
008 *
009 *     http://www.apache.org/licenses/LICENSE-2.0
010 *
011 *  Unless required by applicable law or agreed to in writing, software
012 *  distributed under the License is distributed on an "AS IS" BASIS,
013 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014 *  See the License for the specific language governing permissions and
015 *  limitations under the License.
016 */
017package org.apache.commons.compress.harmony.unpack200.bytecode;
018
019import java.io.DataOutputStream;
020import java.io.IOException;
021
022/**
023 * Signature class file attribute
024 */
025public class SignatureAttribute extends Attribute {
026
027    private int signature_index;
028    private final CPUTF8 signature;
029
030    private static CPUTF8 attributeName;
031
032    public static void setAttributeName(final CPUTF8 cpUTF8Value) {
033        attributeName = cpUTF8Value;
034    }
035
036    public SignatureAttribute(final CPUTF8 value) {
037        super(attributeName);
038        this.signature = value;
039    }
040
041    /*
042     * (non-Javadoc)
043     *
044     * @see org.apache.commons.compress.harmony.unpack200.bytecode.Attribute#getLength()
045     */
046    @Override
047    protected int getLength() {
048        return 2;
049    }
050
051    @Override
052    protected ClassFileEntry[] getNestedClassFileEntries() {
053        return new ClassFileEntry[] {getAttributeName(), signature};
054    }
055
056    @Override
057    protected void resolve(final ClassConstantPool pool) {
058        super.resolve(pool);
059        signature.resolve(pool);
060        signature_index = pool.indexOf(signature);
061    }
062
063    /*
064     * (non-Javadoc)
065     *
066     * @see org.apache.commons.compress.harmony.unpack200.bytecode.Attribute#writeBody(java.io.DataOutputStream)
067     */
068    @Override
069    protected void writeBody(final DataOutputStream dos) throws IOException {
070        dos.writeShort(signature_index);
071    }
072
073    /*
074     * (non-Javadoc)
075     *
076     * @see org.apache.commons.compress.harmony.unpack200.bytecode.ClassFileEntry#toString()
077     */
078    @Override
079    public String toString() {
080        // TODO Auto-generated method stub
081        return "Signature: " + signature;
082    }
083
084}