    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.forms;
    018
    019import org.apache.commons.compress.harmony.pack200.Pack200Exception;
    020import org.apache.commons.compress.harmony.unpack200.SegmentConstantPool;
    021import org.apache.commons.compress.harmony.unpack200.bytecode.ByteCode;
    022import org.apache.commons.compress.harmony.unpack200.bytecode.ClassFileEntry;
    023import org.apache.commons.compress.harmony.unpack200.bytecode.OperandManager;
    024
    025/**
    026 * Abstract superclass of those classes which look up init methods (these are class specific methods). They use
    027 * getInitMethodPoolEntry to find the methods.
    028 */
    029public abstract class InitMethodReferenceForm extends ClassSpecificReferenceForm {
    030
    031    public InitMethodReferenceForm(final int opcode, final String name, final int[] rewrite) {
    032        super(opcode, name, rewrite);
    033    }
    034
    035    @Override
    036    protected abstract String context(OperandManager operandManager);
    037
    038    @Override
    039    protected int getPoolID() {
    040        return SegmentConstantPool.CP_METHOD;
    041    }
    042
    043    @Override
    044    protected int getOffset(final OperandManager operandManager) {
    045        return operandManager.nextInitRef();
    046    }
    047
    048    @Override
    049    protected void setNestedEntries(final ByteCode byteCode, final OperandManager operandManager, final int offset)
    050        throws Pack200Exception {
    051        final SegmentConstantPool globalPool = operandManager.globalConstantPool();
    052        ClassFileEntry[] nested = null;
    053        nested = new ClassFileEntry[] {
    054            globalPool.getInitMethodPoolEntry(SegmentConstantPool.CP_METHOD, offset, context(operandManager))};
    055        byteCode.setNested(nested);
    056        byteCode.setNestedPositions(new int[][] {{0, 2}});
    057    }
    058}