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;
018
019import java.io.DataOutputStream;
020import java.io.IOException;
021
022/**
023 * Abstract superclass for constant pool entries
024 */
025public abstract class ConstantPoolEntry extends ClassFileEntry {
026
027    public static final byte CP_Class = 7;
028
029    public static final byte CP_Double = 6;
030
031    public static final byte CP_Fieldref = 9;
032
033    public static final byte CP_Float = 4;
034
035    public static final byte CP_Integer = 3;
036
037    /*
038     * class MemberRef extends ConstantPoolEntry { private int index; Class(String name) { super(CP_Class); index =
039     * pool.indexOf(name); } void writeBody(DataOutputStream dos) throws IOException { dos.writeShort(index); } }
040     */
041
042    public static final byte CP_InterfaceMethodref = 11;
043
044    public static final byte CP_Long = 5;
045
046    public static final byte CP_Methodref = 10;
047
048    public static final byte CP_NameAndType = 12;
049
050    public static final byte CP_String = 8;
051
052    public static final byte CP_UTF8 = 1;
053
054    byte tag;
055
056    protected int globalIndex;
057
058    ConstantPoolEntry(final byte tag, final int globalIndex) {
059        this.tag = tag;
060        this.globalIndex = globalIndex;
061    }
062
063    @Override
064    public abstract boolean equals(Object obj);
065
066    public byte getTag() {
067        return tag;
068    }
069
070    @Override
071    public abstract int hashCode();
072
073    @Override
074    public void doWrite(final DataOutputStream dos) throws IOException {
075        dos.writeByte(tag);
076        writeBody(dos);
077    }
078
079    protected abstract void writeBody(DataOutputStream dos) throws IOException;
080
081    public int getGlobalIndex() {
082        return globalIndex;
083    }
084}