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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.visitor.ClassVisitor;
     25 
     26 /**
     27  * This ClassVisitor marks all program classes that it visits as caught.
     28  * This means that these classes are exception classes that occur in exception
     29  * handlers.
     30  *
     31  * @author Eric Lafortune
     32  */
     33 public class CaughtClassMarker
     34 implements   ClassVisitor
     35 {
     36     // Implementations for ClassVisitor.
     37 
     38     public void visitLibraryClass(LibraryClass libraryClass) {}
     39 
     40     public void visitProgramClass(ProgramClass programClass)
     41     {
     42         setCaught(programClass);
     43     }
     44 
     45 
     46     // Small utility methods.
     47 
     48     private static void setCaught(Clazz clazz)
     49     {
     50         ClassOptimizationInfo info = ClassOptimizationInfo.getClassOptimizationInfo(clazz);
     51         if (info != null)
     52         {
     53             info.setCaught();
     54         }
     55     }
     56 
     57 
     58     public static boolean isCaught(Clazz clazz)
     59     {
     60         ClassOptimizationInfo info = ClassOptimizationInfo.getClassOptimizationInfo(clazz);
     61         return info == null || info.isCaught();
     62     }
     63 }