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}