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.bytecode.ByteCode;
021import org.apache.commons.compress.harmony.unpack200.bytecode.OperandManager;
022
023/**
024 * This class is used for representations of cldc and cldc_w. In these cases, a narrow class ref has one byte and a wide
025 * class ref has two bytes.
026 */
027public class NarrowClassRefForm extends ClassRefForm {
028
029    public NarrowClassRefForm(final int opcode, final String name, final int[] rewrite) {
030        super(opcode, name, rewrite);
031    }
032
033    public NarrowClassRefForm(final int opcode, final String name, final int[] rewrite, final boolean widened) {
034        super(opcode, name, rewrite, widened);
035    }
036
037    @Override
038    protected void setNestedEntries(final ByteCode byteCode, final OperandManager operandManager, final int offset)
039        throws Pack200Exception {
040        super.setNestedEntries(byteCode, operandManager, offset);
041        if (!widened) {
042            byteCode.setNestedPositions(new int[][] {{0, 1}});
043        }
044    }
045
046    @Override
047    public boolean nestedMustStartClassPool() {
048        return !widened;
049    }
050}