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