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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.ClassVisitor;
     26 
     27 /**
     28  * This ClassVisitor marks all classes that contain static initializers.
     29  *
     30  * @author Eric Lafortune
     31  */
     32 public class StaticInitializerContainingClassMarker
     33 extends      SimplifiedVisitor
     34 implements   ClassVisitor
     35 {
     36     // Implementations for ClassVisitor.
     37 
     38     public void visitAnyClass(Clazz clazz)
     39     {
     40         if (clazz.findMethod(ClassConstants.METHOD_NAME_CLINIT,
     41                              ClassConstants.METHOD_TYPE_CLINIT) != null)
     42         {
     43             setStaticInitializer(clazz);
     44         }
     45     }
     46 
     47 
     48     // Small utility methods.
     49 
     50     private static void setStaticInitializer(Clazz clazz)
     51     {
     52         ClassOptimizationInfo info = ClassOptimizationInfo.getClassOptimizationInfo(clazz);
     53         if (info != null)
     54         {
     55             info.setContainsStaticInitializer();
     56         }
     57     }
     58 
     59 
     60     public static boolean containsStaticInitializer(Clazz clazz)
     61     {
     62         ClassOptimizationInfo info = ClassOptimizationInfo.getClassOptimizationInfo(clazz);
     63         return info == null || info.containsStaticInitializer();
     64     }
     65 }