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 all classes that have class-specific references to constant pool information. These classes have a context (a string representing a
027 * pack200 class) i.e., they send getClassSpecificPoolEntry instead of getConstantPoolEntry.
028 */
029public abstract class ClassSpecificReferenceForm extends ReferenceForm {
030
031    public ClassSpecificReferenceForm(final int opcode, final String name, final int[] rewrite) {
032        super(opcode, name, rewrite);
033    }
034
035    protected abstract String context(OperandManager operandManager);
036
037    @Override
038    protected abstract int getOffset(OperandManager operandManager);
039
040    @Override
041    protected abstract int getPoolID();
042
043    @Override
044    protected void setNestedEntries(final ByteCode byteCode, final OperandManager operandManager, final int offset) throws Pack200Exception {
045        final SegmentConstantPool globalPool = operandManager.globalConstantPool();
046        final ClassFileEntry[] nested = { globalPool.getClassSpecificPoolEntry(getPoolID(), offset, context(operandManager)) };
047        byteCode.setNested(nested);
048        byteCode.setNestedPositions(new int[][] { { 0, 2 } });
049    }
050
051}