    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 *
    017 */
    018package org.apache.bcel.verifier.structurals;
    019
    020
    021import org.apache.bcel.Const;
    022import org.apache.bcel.Constants;
    023import org.apache.bcel.generic.ObjectType;
    024import org.apache.bcel.generic.ReferenceType;
    025
    026/**
    027 * This class represents an uninitialized object type; see The Java
    028 * Virtual Machine Specification, Second Edition, page 147: 4.9.4 for
    029 * more details.
    030 *
    031 * @version $Id$
    032 */
    033public class UninitializedObjectType extends ReferenceType implements Constants {
    034
    035    /** The "initialized" version. */
    036    private final ObjectType initialized;
    037
    038    /** Creates a new instance. */
    039    public UninitializedObjectType(final ObjectType t) {
    040        super(Const.T_UNKNOWN, "<UNINITIALIZED OBJECT OF TYPE '"+t.getClassName()+"'>");
    041        initialized = t;
    042    }
    043
    044    /**
    045     * Returns the ObjectType of the same class as the one of the uninitialized object
    046     * represented by this UninitializedObjectType instance.
    047     */
    048    public ObjectType getInitialized() {
    049        return initialized;
    050    }
    051
    052    /** @return a hash code value for the object.
    053     */
    054    @Override
    055    public int hashCode() { return initialized.hashCode(); }
    056
    057    /**
    058     * Returns true on equality of this and o.
    059     * Equality means the ObjectType instances of "initialized"
    060     * equal one another in this and the o instance.
    061     *
    062     */
    063    @Override
    064    public boolean equals(final Object o) {
    065        if (! (o instanceof UninitializedObjectType)) {
    066            return false;
    067        }
    068        return initialized.equals(((UninitializedObjectType)o).initialized);
    069    }
    070}