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 */ 032public class UninitializedObjectType extends ReferenceType implements Constants { 033 034 /** The "initialized" version. */ 035 private final ObjectType initialized; 036 037 /** Creates a new instance. */ 038 public UninitializedObjectType(final ObjectType t) { 039 super(Const.T_UNKNOWN, "<UNINITIALIZED OBJECT OF TYPE '"+t.getClassName()+"'>"); 040 initialized = t; 041 } 042 043 /** 044 * Returns the ObjectType of the same class as the one of the uninitialized object 045 * represented by this UninitializedObjectType instance. 046 */ 047 public ObjectType getInitialized() { 048 return initialized; 049 } 050 051 /** @return a hash code value for the object. 052 */ 053 @Override 054 public int hashCode() { return initialized.hashCode(); } 055 056 /** 057 * Returns true on equality of this and o. 058 * Equality means the ObjectType instances of "initialized" 059 * equal one another in this and the o instance. 060 * 061 */ 062 @Override 063 public boolean equals(final Object o) { 064 if (! (o instanceof UninitializedObjectType)) { 065 return false; 066 } 067 return initialized.equals(((UninitializedObjectType)o).initialized); 068 } 069}