1/*
2 * ProGuard -- shrinking, optimization, obfuscation, and preverification
3 *             of Java bytecode.
4 *
5 * Copyright (c) 2002-2014 Eric Lafortune (eric@graphics.cornell.edu)
6 *
7 * This program is free software; you can redistribute it and/or modify it
8 * under the terms of the GNU General Public License as published by the Free
9 * Software Foundation; either version 2 of the License, or (at your option)
10 * any later version.
11 *
12 * This program is distributed in the hope that it will be useful, but WITHOUT
13 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
14 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
15 * more details.
16 *
17 * You should have received a copy of the GNU General Public License along
18 * with this program; if not, write to the Free Software Foundation, Inc.,
19 * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
20 */
21package proguard.evaluation.value;
22
23import proguard.classfile.Clazz;
24
25/**
26 * This TypedReferenceValue represents a reference value that is identified by a
27 * unique ID.
28 *
29 * @author Eric Lafortune
30 */
31class IdentifiedReferenceValue extends TypedReferenceValue
32{
33    private final ValueFactory valuefactory;
34    private final int          id;
35
36
37    /**
38     * Creates a new reference value with the given ID.
39     */
40    public IdentifiedReferenceValue(String       type,
41                                    Clazz        referencedClass,
42                                    boolean      mayBeNull,
43                                    ValueFactory valuefactory,
44                                    int          id)
45    {
46        super(type, referencedClass, mayBeNull);
47
48        this.valuefactory = valuefactory;
49        this.id           = id;
50    }
51
52
53    // Implementations of binary methods of ReferenceValue.
54
55    public ReferenceValue generalize(ReferenceValue other)
56    {
57        return other.generalize(this);
58    }
59
60
61    public int equal(ReferenceValue other)
62    {
63        return other.equal(this);
64    }
65
66
67    // Implementations of binary ReferenceValue methods with
68    // IdentifiedReferenceValue arguments.
69
70//    public ReferenceValue generalize(IdentifiedReferenceValue other)
71//    {
72//        return generalize((TypedReferenceValue)other);
73//    }
74
75
76    public int equal(IdentifiedReferenceValue other)
77    {
78        return this.equals(other) ? ALWAYS :
79                                    this.equal((TypedReferenceValue)other);
80    }
81
82
83//    // Implementations of binary ReferenceValue methods with
84//    // ArrayReferenceValue arguments.
85//
86//    public ReferenceValue generalize(ArrayReferenceValue other)
87//    {
88//        return generalize((TypedReferenceValue)other);
89//    }
90//
91//
92//    public int equal(ArrayReferenceValue other)
93//    {
94//        return equal((TypedReferenceValue)other);
95//    }
96//
97//
98//    // Implementations of binary ReferenceValue methods with
99//    // IdentifiedArrayReferenceValue arguments.
100//
101//    public ReferenceValue generalize(IdentifiedArrayReferenceValue other)
102//    {
103//        return generalize((ArrayReferenceValue)other);
104//    }
105//
106//
107//    public int equal(IdentifiedArrayReferenceValue other)
108//    {
109//        return equal((ArrayReferenceValue)other);
110//    }
111//
112//
113//    // Implementations of binary ReferenceValue methods with
114//    // DetailedArrayReferenceValue arguments.
115//
116//    public ReferenceValue generalize(DetailedArrayReferenceValue other)
117//    {
118//        return generalize((IdentifiedArrayReferenceValue)other);
119//    }
120//
121//
122//    public int equal(DetailedArrayReferenceValue other)
123//    {
124//        return equal((IdentifiedArrayReferenceValue)other);
125//    }
126
127
128    // Implementations for Value.
129
130    public boolean isSpecific()
131    {
132        return true;
133    }
134
135
136    // Implementations for Object.
137
138    public boolean equals(Object object)
139    {
140        return this == object ||
141               super.equals(object) &&
142               this.valuefactory.equals(((IdentifiedReferenceValue)object).valuefactory) &&
143               this.id == ((IdentifiedReferenceValue)object).id;
144    }
145
146
147    public int hashCode()
148    {
149        return super.hashCode() ^
150               valuefactory.hashCode() ^
151               id;
152    }
153
154
155    public String toString()
156    {
157        return super.toString()+'#'+id;
158    }
159}