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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.editor;
     22 
     23 import proguard.classfile.*;
     24 import proguard.classfile.attribute.*;
     25 import proguard.classfile.attribute.visitor.LocalVariableTypeInfoVisitor;
     26 
     27 /**
     28  * This LocalVariableTypeInfoVisitor adds all local variable types that it
     29  * visits to the given target local variable type attribute.
     30  */
     31 public class LocalVariableTypeInfoAdder
     32 implements   LocalVariableTypeInfoVisitor
     33 {
     34     private final ConstantAdder                     constantAdder;
     35     private final LocalVariableTypeTableAttributeEditor localVariableTypeTableAttributeEditor;
     36 
     37 
     38     /**
     39      * Creates a new LocalVariableTypeInfoAdder that will copy local variable
     40      * types into the given target local variable type table.
     41      */
     42     public LocalVariableTypeInfoAdder(ProgramClass                    targetClass,
     43                                       LocalVariableTypeTableAttribute targetLocalVariableTypeTableAttribute)
     44     {
     45         this.constantAdder                         = new ConstantAdder(targetClass);
     46         this.localVariableTypeTableAttributeEditor = new LocalVariableTypeTableAttributeEditor(targetLocalVariableTypeTableAttribute);
     47     }
     48 
     49 
     50     // Implementations for LocalVariableTypeInfoVisitor.
     51 
     52     public void visitLocalVariableTypeInfo(Clazz clazz, Method method, CodeAttribute codeAttribute, LocalVariableTypeInfo localVariableTypeInfo)
     53     {
     54         // Create a new local variable type.
     55         LocalVariableTypeInfo newLocalVariableTypeInfo =
     56             new LocalVariableTypeInfo(localVariableTypeInfo.u2startPC,
     57                                       localVariableTypeInfo.u2length,
     58                                       constantAdder.addConstant(clazz, localVariableTypeInfo.u2nameIndex),
     59                                       constantAdder.addConstant(clazz, localVariableTypeInfo.u2signatureIndex),
     60                                       localVariableTypeInfo.u2index);
     61 
     62         // TODO: Clone array.
     63         newLocalVariableTypeInfo.referencedClasses = localVariableTypeInfo.referencedClasses;
     64 
     65         // Add it to the target.
     66         localVariableTypeTableAttributeEditor.addLocalVariableTypeInfo(newLocalVariableTypeInfo);
     67     }
     68 }