java/src/main/com/google/appengine/tools/development/agent/impl/NonRecordingGeneratorAdapter.java

   1 // Copyright 2012 Google Inc. All Rights Reserved.
   2
   3 package com.google.appengine.tools.development.agent.impl;
   4
   5 import org.objectweb.asm.MethodVisitor;
   6 import org.objectweb.asm.Type;
   7 import org.objectweb.asm.commons.GeneratorAdapter;
   8
   9 /**
  10  * A subclass of {@link GeneratorAdapter} that does not record the types of newly added local
  11  * variables, thereby avoiding a bug in {@link org.objectweb.asm.commons.LocalVariablesSorter}.
  12  * <p>
  13  * Use this class instead of {@link GeneratorAdapter} to avoid <a
  14  * href="http://forge.ow2.org/tracker/index.php?func=detail&aid=316352&group_id=23&atid=100023">ASM
  15  * bug #316352 </a>
  16  * <p>
  17  *
  18  *
  19  */
  20 public class NonRecordingGeneratorAdapter extends GeneratorAdapter {
  21
  22   public NonRecordingGeneratorAdapter(
  23       MethodVisitor methodVisitor, int access, String name, String desc) {
  24     super(methodVisitor, access, name, desc);
  25   }
  26
  27   /**
  28    * Creates a new local variable of the given type.
  29    *
  30    * @param type the type of the local variable to be created.
  31    * @return the identifier of the newly created local variable.
  32    */
  33   @Override
  34   public int newLocal(final Type type) {
  35     int local = nextLocal;
  36     nextLocal += type.getSize();
  37     setLocalType(local, type);
  38     return local;
  39   }
  40
  41 }