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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.preverify;
     22 
     23 import proguard.Configuration;
     24 import proguard.classfile.*;
     25 import proguard.classfile.attribute.visitor.AllAttributeVisitor;
     26 import proguard.classfile.visitor.*;
     27 
     28 /**
     29  * This class can preverify methods in program class pools, according to a given
     30  * configuration.
     31  *
     32  * @author Eric Lafortune
     33  */
     34 public class Preverifier
     35 {
     36     private final Configuration configuration;
     37 
     38 
     39     /**
     40      * Creates a new Preverifier.
     41      */
     42     public Preverifier(Configuration configuration)
     43     {
     44         this.configuration = configuration;
     45     }
     46 
     47 
     48     /**
     49      * Performs preverification of the given program class pool.
     50      */
     51     public void execute(ClassPool programClassPool)
     52     {
     53         // Clean up any old visitor info.
     54         programClassPool.classesAccept(new ClassCleaner());
     55 
     56         // Preverify all methods.
     57         // Classes for JME must be preverified.
     58         // Classes for JSE 6 may optionally be preverified.
     59         // Classes for JSE 7 or higher must be preverified.
     60         programClassPool.classesAccept(
     61             new ClassVersionFilter(configuration.microEdition ?
     62                                        ClassConstants.CLASS_VERSION_1_0 :
     63                                        ClassConstants.CLASS_VERSION_1_6,
     64             new AllMethodVisitor(
     65             new AllAttributeVisitor(
     66             new CodePreverifier(configuration.microEdition)))));
     67     }
     68 }
     69