    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
    027 * have a context (a string representing a pack200 class) i.e., they send getClassSpecificPoolEntry instead of
    028 * getConstantPoolEntry.
    029 *
    030 */
    031public abstract class ClassSpecificReferenceForm extends ReferenceForm {
    032
    033    public ClassSpecificReferenceForm(final int opcode, final String name, final int[] rewrite) {
    034        super(opcode, name, rewrite);
    035    }
    036
    037    @Override
    038    protected abstract int getOffset(OperandManager operandManager);
    039
    040    @Override
    041    protected abstract int getPoolID();
    042
    043    protected abstract String context(OperandManager operandManager);
    044
    045    @Override
    046    protected void setNestedEntries(final ByteCode byteCode, final OperandManager operandManager, final int offset)
    047        throws Pack200Exception {
    048        final SegmentConstantPool globalPool = operandManager.globalConstantPool();
    049        ClassFileEntry[] nested = null;
    050        nested = new ClassFileEntry[] {
    051            globalPool.getClassSpecificPoolEntry(getPoolID(), offset, context(operandManager))};
    052        byteCode.setNested(nested);
    053        byteCode.setNestedPositions(new int[][] {{0, 2}});
    054    }
    055
    056}