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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.editor;
     22 
     23 import proguard.classfile.attribute.annotation.*;
     24 
     25 /**
     26  * This class can add annotations to a given annotations attribute.
     27  * Annotations to be added must have been filled out beforehand.
     28  *
     29  * @author Eric Lafortune
     30  */
     31 public class AnnotationsAttributeEditor
     32 {
     33     private AnnotationsAttribute targetAnnotationsAttribute;
     34 
     35 
     36     /**
     37      * Creates a new AnnotationsAttributeEditor that will edit annotations in
     38      * the given annotations attribute.
     39      */
     40     public AnnotationsAttributeEditor(AnnotationsAttribute targetAnnotationsAttribute)
     41     {
     42         this.targetAnnotationsAttribute = targetAnnotationsAttribute;
     43     }
     44 
     45 
     46     /**
     47      * Adds a given annotation to the annotations attribute.
     48      */
     49     public void addAnnotation(Annotation annotation)
     50     {
     51         int          annotationsCount = targetAnnotationsAttribute.u2annotationsCount;
     52         Annotation[] annotations      = targetAnnotationsAttribute.annotations;
     53 
     54         // Make sure there is enough space for the new annotation.
     55         if (annotations.length <= annotationsCount)
     56         {
     57             targetAnnotationsAttribute.annotations = new Annotation[annotationsCount+1];
     58             System.arraycopy(annotations, 0,
     59                              targetAnnotationsAttribute.annotations, 0,
     60                              annotationsCount);
     61             annotations = targetAnnotationsAttribute.annotations;
     62         }
     63 
     64         // Add the annotation.
     65         annotations[targetAnnotationsAttribute.u2annotationsCount++] = annotation;
     66     }
     67 }