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.unpack200.SegmentConstantPool;
020import org.apache.commons.compress.harmony.unpack200.bytecode.OperandManager;
021
022/**
023 * This class implements references to fields defined in the current class, which is set by this class in the
024 * OperandManager. Pack200 allows the current class to be inferred from context; this class tracks previous field
025 * reference classes to allow this.
026 */
027public class ThisFieldRefForm extends ClassSpecificReferenceForm {
028
029    public ThisFieldRefForm(final int opcode, final String name, final int[] rewrite) {
030        super(opcode, name, rewrite);
031    }
032
033    @Override
034    protected String context(final OperandManager operandManager) {
035        return operandManager.getCurrentClass();
036    }
037
038    @Override
039    protected int getOffset(final OperandManager operandManager) {
040        return operandManager.nextThisFieldRef();
041    }
042
043    @Override
044    protected int getPoolID() {
045        return SegmentConstantPool.CP_FIELD;
046    }
047}