    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 static CPUTF8 attributeName;
    028
    029    public static void setAttributeName(final CPUTF8 cpUTF8Value) {
    030        attributeName = cpUTF8Value;
    031    }
    032
    033    private int signatureIndex;
    034
    035    private final CPUTF8 signature;
    036
    037    public SignatureAttribute(final CPUTF8 value) {
    038        super(attributeName);
    039        this.signature = value;
    040    }
    041
    042    /*
    043     * (non-Javadoc)
    044     *
    045     * @see org.apache.commons.compress.harmony.unpack200.bytecode.Attribute#getLength()
    046     */
    047    @Override
    048    protected int getLength() {
    049        return 2;
    050    }
    051
    052    @Override
    053    protected ClassFileEntry[] getNestedClassFileEntries() {
    054        return new ClassFileEntry[] { getAttributeName(), signature };
    055    }
    056
    057    @Override
    058    protected void resolve(final ClassConstantPool pool) {
    059        super.resolve(pool);
    060        signature.resolve(pool);
    061        signatureIndex = pool.indexOf(signature);
    062    }
    063
    064    /*
    065     * (non-Javadoc)
    066     *
    067     * @see org.apache.commons.compress.harmony.unpack200.bytecode.ClassFileEntry#toString()
    068     */
    069    @Override
    070    public String toString() {
    071        // TODO Auto-generated method stub
    072        return "Signature: " + signature;
    073    }
    074
    075    /*
    076     * (non-Javadoc)
    077     *
    078     * @see org.apache.commons.compress.harmony.unpack200.bytecode.Attribute#writeBody(java.io.DataOutputStream)
    079     */
    080    @Override
    081    protected void writeBody(final DataOutputStream dos) throws IOException {
    082        dos.writeShort(signatureIndex);
    083    }
    084
    085}