    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.bcel.verifier.structurals;
    018
    019import org.apache.bcel.Const;
    020import org.apache.bcel.Constants;
    021import org.apache.bcel.generic.ObjectType;
    022import org.apache.bcel.generic.ReferenceType;
    023
    024/**
    025 * This class represents an uninitialized object type; see The Java Virtual Machine Specification, Second Edition, page
    026 * 147: 4.9.4 for more details.
    027 */
    028public class UninitializedObjectType extends ReferenceType implements Constants {
    029
    030    /** The "initialized" version. */
    031    private final ObjectType initialized;
    032
    033    /**
    034     * Creates a new instance.
    035     *
    036     * @param objectType uninitialized object type.
    037     */
    038    public UninitializedObjectType(final ObjectType objectType) {
    039        super(Const.T_UNKNOWN, "<UNINITIALIZED OBJECT OF TYPE '" + objectType.getClassName() + "'>");
    040        initialized = objectType;
    041    }
    042
    043    /**
    044     * Returns true on equality of this and o. Equality means the ObjectType instances of "initialized" equal one another in
    045     * this and the o instance.
    046     *
    047     */
    048    @Override
    049    public boolean equals(final Object o) {
    050        if (!(o instanceof UninitializedObjectType)) {
    051            return false;
    052        }
    053        return initialized.equals(((UninitializedObjectType) o).initialized);
    054    }
    055
    056    /**
    057     * Returns the ObjectType of the same class as the one of the uninitialized object represented by this
    058     * UninitializedObjectType instance.
    059     *
    060     * @return the ObjectType.
    061     */
    062    public ObjectType getInitialized() {
    063        return initialized;
    064    }
    065
    066    /**
    067     * @return a hash code value for the object.
    068     */
    069    @Override
    070    public int hashCode() {
    071        return initialized.hashCode();
    072    }
    073}