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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.optimize.info;
     22 
     23 import proguard.classfile.*;
     24 import proguard.classfile.util.SimplifiedVisitor;
     25 import proguard.classfile.visitor.*;
     26 
     27 /**
     28  * This ClassVisitor marks all classes that contain package visible members.
     29  *
     30  * @author Eric Lafortune
     31  */
     32 public class PackageVisibleMemberContainingClassMarker
     33 extends      SimplifiedVisitor
     34 implements   ClassVisitor,
     35              MemberVisitor
     36 {
     37     // Implementations for ClassVisitor.
     38 
     39     public void visitAnyClass(Clazz clazz)
     40     {
     41         // Check the class itself.
     42         if ((clazz.getAccessFlags() & ClassConstants.ACC_PUBLIC) == 0)
     43         {
     44             setPackageVisibleMembers(clazz);
     45         }
     46         else
     47         {
     48             // Check the members.
     49             clazz.fieldsAccept(this);
     50             clazz.methodsAccept(this);
     51         }
     52     }
     53 
     54 
     55     // Implementations for MemberVisitor.
     56 
     57     public void visitAnyMember(Clazz clazz, Member member)
     58     {
     59         if ((member.getAccessFlags() &
     60              (ClassConstants.ACC_PRIVATE |
     61               ClassConstants.ACC_PUBLIC)) == 0)
     62         {
     63             setPackageVisibleMembers(clazz);
     64         }
     65     }
     66 
     67 
     68     // Small utility methods.
     69 
     70     private static void setPackageVisibleMembers(Clazz clazz)
     71     {
     72         ClassOptimizationInfo info = ClassOptimizationInfo.getClassOptimizationInfo(clazz);
     73         if (info != null)
     74         {
     75             info.setContainsPackageVisibleMembers();
     76         }
     77     }
     78 
     79 
     80     public static boolean containsPackageVisibleMembers(Clazz clazz)
     81     {
     82         ClassOptimizationInfo info = ClassOptimizationInfo.getClassOptimizationInfo(clazz);
     83         return info == null || info.containsPackageVisibleMembers();
     84     }
     85 }