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      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.classfile.attribute.annotation;
     22 
     23 import proguard.classfile.*;
     24 import proguard.classfile.attribute.annotation.visitor.ElementValueVisitor;
     25 import proguard.classfile.visitor.ClassVisitor;
     26 
     27 /**
     28  * This ElementValue represents an enumeration constant element value.
     29  *
     30  * @author Eric Lafortune
     31  */
     32 public class EnumConstantElementValue extends ElementValue
     33 {
     34     public int u2typeNameIndex;
     35     public int u2constantNameIndex;
     36 
     37     /**
     38      * An extra field pointing to the Clazz objects referenced in the
     39      * type name string. This field is typically filled out by the <code>{@link
     40      * proguard.classfile.util.ClassReferenceInitializer
     41      * ClassReferenceInitializer}</code>.
     42      * References to primitive types are ignored.
     43      */
     44     public Clazz[] referencedClasses;
     45 
     46 
     47     /**
     48      * Creates an uninitialized EnumConstantElementValue.
     49      */
     50     public EnumConstantElementValue()
     51     {
     52     }
     53 
     54 
     55     /**
     56      * Creates an initialized EnumConstantElementValue.
     57      */
     58     public EnumConstantElementValue(int u2elementNameIndex,
     59                                     int u2typeNameIndex,
     60                                     int u2constantNameIndex)
     61     {
     62         super(u2elementNameIndex);
     63 
     64         this.u2typeNameIndex     = u2typeNameIndex;
     65         this.u2constantNameIndex = u2constantNameIndex;
     66     }
     67 
     68 
     69     /**
     70      * Applies the given visitor to all referenced classes.
     71      */
     72     public void referencedClassesAccept(ClassVisitor classVisitor)
     73     {
     74         if (referencedClasses != null)
     75         {
     76             for (int index = 0; index < referencedClasses.length; index++)
     77             {
     78                 Clazz referencedClass = referencedClasses[index];
     79                 if (referencedClass != null)
     80                 {
     81                     referencedClass.accept(classVisitor);
     82                 }
     83             }
     84         }
     85     }
     86 
     87 
     88     // Implementations for ElementValue.
     89 
     90     public int getTag()
     91     {
     92         return ClassConstants.ELEMENT_VALUE_ENUM_CONSTANT;
     93     }
     94 
     95     public void accept(Clazz clazz, Annotation annotation, ElementValueVisitor elementValueVisitor)
     96     {
     97         elementValueVisitor.visitEnumConstantElementValue(clazz, annotation, this);
     98     }
     99 }
    100