Home | History | Annotate | Download | only in value 
      1 /*
      2  * ProGuard -- shrinking, optimization, obfuscation, and preverification
      3  *             of Java bytecode.
      4  *
      5  * Copyright (c) 2002-2009 Eric Lafortune (eric (at) 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  */
     21 package proguard.evaluation.value;
     22 
     23 import proguard.classfile.Clazz;
     24 
     25 /**
     26  * This LongValue represents a reference value that is identified by a unique ID.
     27  *
     28  * @author Eric Lafortune
     29  */
     30 final class IdentifiedReferenceValue extends ReferenceValue
     31 {
     32     private final ValueFactory valuefactory;
     33     private final int          id;
     34 
     35 
     36     /**
     37      * Creates a new long value with the given ID.
     38      */
     39     public IdentifiedReferenceValue(String       type,
     40                                     Clazz        referencedClass,
     41                                     boolean      mayBeNull,
     42                                     ValueFactory valuefactory,
     43                                     int          id)
     44     {
     45         super(type, referencedClass, mayBeNull);
     46 
     47         this.valuefactory = valuefactory;
     48         this.id           = id;
     49     }
     50 
     51 
     52     // Implementations for ReferenceValue.
     53 
     54     public int equal(ReferenceValue other)
     55     {
     56         return this.equals(other) ? ALWAYS : MAYBE;
     57     }
     58 
     59 
     60     // Implementations for Value.
     61 
     62     public boolean isSpecific()
     63     {
     64         return true;
     65     }
     66 
     67 
     68     // Implementations for Object.
     69 
     70     public boolean equals(Object object)
     71     {
     72         return this == object ||
     73                super.equals(object) &&
     74                this.valuefactory.equals(((IdentifiedReferenceValue)object).valuefactory) &&
     75                this.id == ((IdentifiedReferenceValue)object).id;
     76     }
     77 
     78 
     79     public int hashCode()
     80     {
     81         return super.hashCode() ^
     82                valuefactory.hashCode() ^
     83                id;
     84     }
     85 
     86 
     87     public String toString()
     88     {
     89         return super.toString()+'#'+id;
     90     }
     91 }