    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 * Enclosing method class file attribute.
    024 */
    025public class EnclosingMethodAttribute 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 classIndex;
    034    private int methodIndex;
    035    private final CPClass cpClass;
    036
    037    private final CPNameAndType method;
    038
    039    public EnclosingMethodAttribute(final CPClass cpClass, final CPNameAndType method) {
    040        super(attributeName);
    041        this.cpClass = cpClass;
    042        this.method = method;
    043    }
    044
    045    /*
    046     * (non-Javadoc)
    047     *
    048     * @see org.apache.commons.compress.harmony.unpack200.bytecode.Attribute#getLength()
    049     */
    050    @Override
    051    protected int getLength() {
    052        return 4;
    053    }
    054
    055    @Override
    056    protected ClassFileEntry[] getNestedClassFileEntries() {
    057        if (method != null) {
    058            return new ClassFileEntry[] { attributeName, cpClass, method };
    059        }
    060        return new ClassFileEntry[] { attributeName, cpClass };
    061    }
    062
    063    @Override
    064    protected void resolve(final ClassConstantPool pool) {
    065        super.resolve(pool);
    066        cpClass.resolve(pool);
    067        classIndex = pool.indexOf(cpClass);
    068        if (method != null) {
    069            method.resolve(pool);
    070            methodIndex = pool.indexOf(method);
    071        } else {
    072            methodIndex = 0;
    073        }
    074    }
    075
    076    /*
    077     * (non-Javadoc)
    078     *
    079     * @see org.apache.commons.compress.harmony.unpack200.bytecode.ClassFileEntry#toString()
    080     */
    081    @Override
    082    public String toString() {
    083        return "EnclosingMethod";
    084    }
    085
    086    /*
    087     * (non-Javadoc)
    088     *
    089     * @see org.apache.commons.compress.harmony.unpack200.bytecode.Attribute#writeBody(java.io.DataOutputStream)
    090     */
    091    @Override
    092    protected void writeBody(final DataOutputStream dos) throws IOException {
    093        dos.writeShort(classIndex);
    094        dos.writeShort(methodIndex);
    095    }
    096
    097}