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      1 /*
      2  * Copyright 2014, Google Inc.
      3  * All rights reserved.
      4  *
      5  * Redistribution and use in source and binary forms, with or without
      6  * modification, are permitted provided that the following conditions are
      7  * met:
      8  *
      9  *     * Redistributions of source code must retain the above copyright
     10  * notice, this list of conditions and the following disclaimer.
     11  *     * Redistributions in binary form must reproduce the above
     12  * copyright notice, this list of conditions and the following disclaimer
     13  * in the documentation and/or other materials provided with the
     14  * distribution.
     15  *     * Neither the name of Google Inc. nor the names of its
     16  * contributors may be used to endorse or promote products derived from
     17  * this software without specific prior written permission.
     18  *
     19  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
     20  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
     21  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
     22  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
     23  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
     24  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
     25  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     26  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     27  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     28  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
     29  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     30  */
     31 
     32 package org.jf.dexlib2.rewriter;
     33 
     34 import org.jf.dexlib2.iface.ExceptionHandler;
     35 import org.jf.dexlib2.iface.MethodImplementation;
     36 import org.jf.dexlib2.iface.TryBlock;
     37 import org.jf.dexlib2.iface.debug.DebugItem;
     38 import org.jf.dexlib2.iface.instruction.Instruction;
     39 
     40 import javax.annotation.Nonnull;
     41 import java.util.List;
     42 
     43 public class MethodImplementationRewriter implements Rewriter<MethodImplementation> {
     44     @Nonnull protected final Rewriters rewriters;
     45 
     46     public MethodImplementationRewriter(@Nonnull Rewriters rewriters) {
     47         this.rewriters = rewriters;
     48     }
     49 
     50     @Nonnull @Override public MethodImplementation rewrite(@Nonnull MethodImplementation methodImplementation) {
     51         return new RewrittenMethodImplementation(methodImplementation);
     52     }
     53 
     54     protected class RewrittenMethodImplementation implements MethodImplementation {
     55         @Nonnull protected MethodImplementation methodImplementation;
     56 
     57         public RewrittenMethodImplementation(@Nonnull MethodImplementation methodImplementation) {
     58             this.methodImplementation = methodImplementation;
     59         }
     60 
     61         @Override public int getRegisterCount() {
     62             return methodImplementation.getRegisterCount();
     63         }
     64 
     65         @Override @Nonnull public Iterable<? extends Instruction> getInstructions() {
     66             return RewriterUtils.rewriteIterable(rewriters.getInstructionRewriter(),
     67                     methodImplementation.getInstructions());
     68         }
     69 
     70         @Override @Nonnull public List<? extends TryBlock<? extends ExceptionHandler>> getTryBlocks() {
     71             return RewriterUtils.rewriteList(rewriters.getTryBlockRewriter(),
     72                     methodImplementation.getTryBlocks());
     73         }
     74 
     75         @Override @Nonnull public Iterable<? extends DebugItem> getDebugItems() {
     76             return RewriterUtils.rewriteIterable(rewriters.getDebugItemRewriter(),
     77                     methodImplementation.getDebugItems());
     78         }
     79     }
     80 }
     81