Examples of javassist.bytecode.CodeIterator$Lookup

javassist.bytecode.CodeIterator
An inserted gap. @since 3.11

    System.out.println("State after s: "+s2);
    System.out.println("isFinal: "+s2.isFinal());
    Iterator<Lookup> lookupIter = gs.getLookups(s2);
    System.out.println("Have lookups: "+lookupIter.hasNext());
    while(lookupIter.hasNext()) {
      Lookup l = lookupIter.next();
      System.out.println("Have a lookup"+l);
    }
    File someFile = new File("tmp.gazbin");
    try {
      gs.save(someFile);
    } catch (FileNotFoundException e) {
      e.printStackTrace();
      assertTrue("could not save trie", false);
      return;
    }
    GazStoreTrie3 gs2 = new GazStoreTrie3();
    try {
      gs2 = (GazStoreTrie3)gs2.load(someFile);
    } catch (FileNotFoundException e) {
      e.printStackTrace();
      assertTrue("could not load trie",false);
      return;
    }
    State init_2 = gs2.getInitialState();
    System.out.println("Initial State: "+init_2);
    State s1_2 = init_2.next('a');
    System.out.println("State after a: "+s1_2);
    System.out.println("isFinal: "+s1_2.isFinal());
    State s2_2 = s1_2.next('s');
    System.out.println("State after s: "+s2_2);
    System.out.println("isFinal: "+s2_2.isFinal());
    Iterator<Lookup> lookupIter_2 = gs2.getLookups(s2_2);
    System.out.println("Have lookups: "+lookupIter_2.hasNext());
    while(lookupIter_2.hasNext()) {
      Lookup l = lookupIter_2.next();
      System.out.println("Have a lookup"+l);
    }
    
    System.out.println("************* end ********************");
  }

View Full Code Here

      }
      CodeAttribute codeAttr = minfo.getCodeAttribute();
      if (codeAttr == null) {
        return;
      }
      CodeIterator iter = codeAttr.iterator();
      while (iter.hasNext()) {
        try {
          int pos = iter.next();
          pos = transformInvokevirtualsIntoGetfields(classfile, iter, pos);
          pos = transformInvokevirtualsIntoPutfields(classfile, iter, pos);


        } catch (BadBytecode e) {
          throw new CannotCompileException(e);

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      final CodeAttribute codeAttr = methodInfo.getCodeAttribute();
      if ( codeAttr == null ) {
        continue;
      }


      final CodeIterator iter = codeAttr.iterator();
      while ( iter.hasNext() ) {
        int pos = iter.next();
        pos = transformInvokevirtualsIntoGetfields( classfile, iter, pos );
        transformInvokevirtualsIntoPutfields( classfile, iter, pos );
      }
      final StackMapTable smt = MapMaker.make( classPool, methodInfo );
      codeAttr.setAttribute( smt );

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      }
      CodeAttribute codeAttr = minfo.getCodeAttribute();
      if (codeAttr == null) {
        return;
      }
      CodeIterator iter = codeAttr.iterator();
      while (iter.hasNext()) {
        try {
          int pos = iter.next();
          pos = transformInvokevirtualsIntoGetfields(classfile, iter, pos);
          pos = transformInvokevirtualsIntoPutfields(classfile, iter, pos);


        } catch (BadBytecode e) {
          throw new CannotCompileException(e);

View Full Code Here

      }
      CodeAttribute codeAttr = minfo.getCodeAttribute();
      if (codeAttr == null) {
        continue;
      }
      CodeIterator iter = codeAttr.iterator();
      while (iter.hasNext()) {
        try {
          int pos = iter.next();
          pos = transformInvokevirtualsIntoGetfields(classfile, iter,
                                                     pos);
          pos = transformInvokevirtualsIntoPutfields(classfile, iter,
                                                     pos);

View Full Code Here

        // would indicate an abstract method, continue to next method
        continue;
      }


      try {
        final CodeIterator itr = codeAttr.iterator();
        while ( itr.hasNext() ) {
          final int index = itr.next();
          final int op = itr.byteAt( index );
          if ( op != Opcode.PUTFIELD && op != Opcode.GETFIELD ) {
            continue;
          }


          final int constIndex = itr.u16bitAt( index + 1 );


          final String fieldName = constPool.getFieldrefName( constIndex );
          final PersistentAttributeDescriptor attributeDescriptor = attributeDescriptorMap.get( fieldName );


          if ( attributeDescriptor == null ) {
            // its not a field we have enhanced for interception, so skip it
            continue;
          }


          log.tracef(
              "Transforming access to field [%s] from method [%s]",
              fieldName,
              methodName
          );


          if ( op == Opcode.GETFIELD ) {
            final int readMethodIndex = constPool.addMethodrefInfo(
                constPool.getThisClassInfo(),
                attributeDescriptor.getReader().getName(),
                attributeDescriptor.getReader().getSignature()
            );
            itr.writeByte( Opcode.INVOKESPECIAL, index );
            itr.write16bit( readMethodIndex, index + 1 );
          }
          else {
            final int writeMethodIndex = constPool.addMethodrefInfo(
                constPool.getThisClassInfo(),
                attributeDescriptor.getWriter().getName(),
                attributeDescriptor.getWriter().getSignature()
            );
            itr.writeByte( Opcode.INVOKESPECIAL, index );
            itr.write16bit( writeMethodIndex, index + 1 );
          }
        }


        final StackMapTable smt = MapMaker.make( classPool, methodInfo );
        methodInfo.getCodeAttribute().setAttribute( smt );

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          bc.addAload(0);
          bc.addGetfield(cc, "_counter", "I");
          bc.add(Bytecode.ICONST_1);
          bc.add(Bytecode.IADD);
          bc.addPutfield(cc, "_counter", "I");
          CodeIterator iter = info.getCodeAttribute().iterator();
          iter.begin();
          iter.insert(bc.get());
        }
      }
    }
    return cc.toBytecode();
  }

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                    //but we need a strong ref
                    Bytecode code = new Bytecode(file.getConstPool());
                    code.addAload(0);
                    code.addAload(beanArgument);
                    code.addInvokestatic(WeldClassChangeAware.class.getName(), "addProxyFactory", "(Lorg/jboss/weld/bean/proxy/ProxyFactory;)V");
                    CodeIterator it = method.getCodeAttribute().iterator();
                    try {
                        it.skipConstructor();
                        it.insert(code.get());
                    } catch (Exception e) {
                        throw new RuntimeException(e);
                    }
                }
            }

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   public static void rewriteLDC(ConstPool constPool, MethodInfo method) throws BadBytecode
   {
      CodeAttribute code = method.getCodeAttribute();
      if (code == null)
         return;
      CodeIterator iterator = code.iterator();
      while (iterator.hasNext())
      {
         int index = iterator.next();
         int op = iterator.byteAt(index);


         if (op == Opcode.LDC || op == Opcode.LDC_W)
         {
            int index0 = iterator.byteAt(index + 1);
            int constIndex = index0;
            if (op == Opcode.LDC_W)
            {
               int index1 = iterator.byteAt(index + 2);
               constIndex = (index0 << 8) + index1;
            }
            if (7 == constPool.getTag(constIndex))
            {
               String className = constPool.getClassInfo(constIndex);
               int theClassName = constPool.addStringInfo(className.replace('/', '.'));
               if (op == Opcode.LDC_W)
               {
                  int b0 = theClassName >>> 8;
                  int b1 = theClassName & 0x0FF;
                  iterator.writeByte(b0, index + 1);
                  iterator.writeByte(b1, index + 2);
               }
               else
               {
                  iterator.writeByte(theClassName, index + 1);
               }
               int classClass = constPool.addClassInfo("java/lang/Class");
               int descriptor = constPool.addMethodrefInfo(classClass, "forName",
                     "(Ljava/lang/String;)Ljava/lang/Class;");
               iterator.insert(new byte[]
               {(byte) Opcode.INVOKESTATIC, (byte) (descriptor >>> 8), (byte) descriptor});
            }
         }
      }
   }

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      }
      CodeAttribute codeAttr = minfo.getCodeAttribute();
      if (codeAttr == null) {
        continue;
      }
      CodeIterator iter = codeAttr.iterator();
      while (iter.hasNext()) {
        int pos = iter.next();
        pos = transformInvokevirtualsIntoGetfields(classfile, iter, pos);
        pos = transformInvokevirtualsIntoPutfields(classfile, iter, pos);
      }
      StackMapTable smt = MapMaker.make(classPool, minfo);
      codeAttr.setAttribute(smt);

View Full Code Here

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