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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.classfile;
     22 
     23 
     24 import proguard.classfile.attribute.Attribute;
     25 import proguard.classfile.attribute.visitor.AttributeVisitor;
     26 import proguard.classfile.visitor.MemberVisitor;
     27 
     28 /**
     29  * Representation of a field or method from a program class.
     30  *
     31  * @author Eric Lafortune
     32  */
     33 public abstract class ProgramMember implements Member
     34 {
     35     public int         u2accessFlags;
     36     public int         u2nameIndex;
     37     public int         u2descriptorIndex;
     38     public int         u2attributesCount;
     39     public Attribute[] attributes;
     40 
     41     /**
     42      * An extra field in which visitors can store information.
     43      */
     44     public Object visitorInfo;
     45 
     46 
     47     /**
     48      * Creates an uninitialized ProgramMember.
     49      */
     50     protected ProgramMember()
     51     {
     52     }
     53 
     54 
     55     /**
     56      * Creates an initialized ProgramMember.
     57      */
     58     protected ProgramMember(int         u2accessFlags,
     59                             int         u2nameIndex,
     60                             int         u2descriptorIndex,
     61                             int         u2attributesCount,
     62                             Attribute[] attributes)
     63     {
     64         this.u2accessFlags     = u2accessFlags;
     65         this.u2nameIndex       = u2nameIndex;
     66         this.u2descriptorIndex = u2descriptorIndex;
     67         this.u2attributesCount = u2attributesCount;
     68         this.attributes        = attributes;
     69     }
     70 
     71 
     72     /**
     73      * Returns the (first) attribute with the given name.
     74      */
     75     private Attribute getAttribute(Clazz clazz, String name)
     76     {
     77         for (int index = 0; index < u2attributesCount; index++)
     78         {
     79             Attribute attribute = attributes[index];
     80             if (attribute.getAttributeName(clazz).equals(name))
     81             {
     82                 return attribute;
     83             }
     84         }
     85 
     86         return null;
     87     }
     88 
     89 
     90     /**
     91      * Accepts the given member info visitor.
     92      */
     93     public abstract void accept(ProgramClass  programClass,
     94                                 MemberVisitor memberVisitor);
     95 
     96 
     97 
     98     /**
     99      * Lets the given attribute info visitor visit all the attributes of
    100      * this member info.
    101      */
    102     public abstract void attributesAccept(ProgramClass     programClass,
    103                                           AttributeVisitor attributeVisitor);
    104 
    105 
    106     // Implementations for Member.
    107 
    108     public int getAccessFlags()
    109     {
    110         return u2accessFlags;
    111     }
    112 
    113     public String getName(Clazz clazz)
    114     {
    115         return clazz.getString(u2nameIndex);
    116     }
    117 
    118     public String getDescriptor(Clazz clazz)
    119     {
    120         return clazz.getString(u2descriptorIndex);
    121     }
    122 
    123     public void accept(Clazz clazz, MemberVisitor memberVisitor)
    124     {
    125         accept((ProgramClass)clazz, memberVisitor);
    126     }
    127 
    128 
    129     // Implementations for VisitorAccepter.
    130 
    131     public Object getVisitorInfo()
    132     {
    133         return visitorInfo;
    134     }
    135 
    136     public void setVisitorInfo(Object visitorInfo)
    137     {
    138         this.visitorInfo = visitorInfo;
    139     }
    140 }
    141