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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 a class element value.
     29  *
     30  * @author Eric Lafortune
     31  */
     32 public class ClassElementValue extends ElementValue
     33 {
     34     public int u2classInfoIndex;
     35 
     36     /**
     37      * An extra field pointing to the Clazz objects referenced in the
     38      * type name string. This field is filled out by the <code>{@link
     39      * proguard.classfile.util.ClassReferenceInitializer ClassReferenceInitializer}</code>.
     40      * References to primitive types are ignored.
     41      */
     42     public Clazz[] referencedClasses;
     43 
     44 
     45     /**
     46      * Creates an uninitialized ClassElementValue.
     47      */
     48     public ClassElementValue()
     49     {
     50     }
     51 
     52 
     53     /**
     54      * Creates an initialized ClassElementValue.
     55      */
     56     public ClassElementValue(int u2elementNameIndex,
     57                              int u2classInfoIndex)
     58     {
     59         super(u2elementNameIndex);
     60 
     61         this.u2classInfoIndex = u2classInfoIndex;
     62     }
     63 
     64 
     65     /**
     66      * Applies the given visitor to all referenced classes.
     67      */
     68     public void referencedClassesAccept(ClassVisitor classVisitor)
     69     {
     70         if (referencedClasses != null)
     71         {
     72             for (int index = 0; index < referencedClasses.length; index++)
     73             {
     74                 Clazz referencedClass = referencedClasses[index];
     75                 if (referencedClass != null)
     76                 {
     77                     referencedClass.accept(classVisitor);
     78                 }
     79             }
     80         }
     81     }
     82 
     83 
     84     // Implementations for ElementValue.
     85 
     86     public int getTag()
     87     {
     88         return ClassConstants.ELEMENT_VALUE_CLASS;
     89     }
     90 
     91     public void accept(Clazz clazz, Annotation annotation, ElementValueVisitor elementValueVisitor)
     92     {
     93         elementValueVisitor.visitClassElementValue(clazz, annotation, this);
     94     }
     95 }
     96