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      1 /*
      2  * ProGuard -- shrinking, optimization, obfuscation, and preverification
      3  *             of Java bytecode.
      4  *
      5  * Copyright (c) 2002-2014 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.*;
     24 
     25 /**
     26  * This particular value factory attaches a unique ID to any unknown values.
     27  *
     28  * @author Eric Lafortune
     29  */
     30 public class IdentifiedValueFactory
     31 extends      ParticularValueFactory
     32 {
     33     protected int integerID;
     34     protected int longID;
     35     protected int floatID;
     36     protected int doubleID;
     37     protected int referenceID;
     38 
     39 
     40     // Implementations for ValueFactory.
     41 
     42     public IntegerValue createIntegerValue()
     43     {
     44         return new IdentifiedIntegerValue(this, integerID++);
     45     }
     46 
     47 
     48     public LongValue createLongValue()
     49     {
     50         return new IdentifiedLongValue(this, longID++);
     51     }
     52 
     53 
     54     public FloatValue createFloatValue()
     55     {
     56         return new IdentifiedFloatValue(this, floatID++);
     57     }
     58 
     59 
     60     public DoubleValue createDoubleValue()
     61     {
     62         return new IdentifiedDoubleValue(this, doubleID++);
     63     }
     64 
     65 
     66     public ReferenceValue createReferenceValue(String  type,
     67                                                Clazz   referencedClass,
     68                                                boolean mayBeNull)
     69     {
     70         return type == null ?
     71             REFERENCE_VALUE_NULL :
     72             new IdentifiedReferenceValue(type,
     73                                          referencedClass,
     74                                          mayBeNull,
     75                                          this,
     76                                          referenceID++);
     77     }
     78 
     79 
     80     public ReferenceValue createArrayReferenceValue(String       type,
     81                                                     Clazz        referencedClass,
     82                                                     IntegerValue arrayLength)
     83     {
     84         return type == null ?
     85             REFERENCE_VALUE_NULL :
     86             new IdentifiedArrayReferenceValue(ClassConstants.TYPE_ARRAY + type,
     87                                               referencedClass,
     88                                               arrayLength,
     89                                               this,
     90                                               referenceID++);
     91     }
     92 }