Package org.apache.bcel.generic

Examples of org.apache.bcel.generic.InstructionFactory.createNew()

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    ObjectType i_stream = new ObjectType("java.io.InputStream");
    ObjectType p_stream = new ObjectType("java.io.PrintStream");

    /* Create BufferedReader object and store it in local variable `in'.
     */
    il.append(factory.createNew("java.io.BufferedReader"));
    il.append(InstructionConstants.DUP); // Use predefined constant, i.e. flyweight
    il.append(factory.createNew("java.io.InputStreamReader"));
    il.append(InstructionConstants.DUP);
    il.append(factory.createFieldAccess("java.lang.System", "in", i_stream,
          Constants.GETSTATIC));
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    /* Create BufferedReader object and store it in local variable `in'.
     */
    il.append(factory.createNew("java.io.BufferedReader"));
    il.append(InstructionConstants.DUP); // Use predefined constant, i.e. flyweight
    il.append(factory.createNew("java.io.InputStreamReader"));
    il.append(InstructionConstants.DUP);
    il.append(factory.createFieldAccess("java.lang.System", "in", i_stream,
          Constants.GETSTATIC));

    /* Call constructors, i.e. BufferedReader(InputStreamReader())
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            Constants.GETSTATIC));
    g.setTarget(ih);

    /* String concatenation compiles to StringBuffer operations.
     */
    il.append(factory.createNew(Type.STRINGBUFFER));
    il.append(InstructionConstants.DUP);
    il.append(new PUSH(cp, "Hello, "));
    il.append(factory.createInvoke("java.lang.StringBuffer", "<init>",
           Type.VOID, new Type[] { Type.STRING },
           Constants.INVOKESPECIAL));
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             new ObjectType("java.awt.event.ActionEvent")
           }, null, "actionPerformed", "foo", il, cp);

      // System.out.println("actionPerformed:" + event);
      il.append(new GETSTATIC(out));
      il.append(factory.createNew("java.lang.StringBuffer"));
      il.append(InstructionConstants.DUP);
      il.append(new PUSH(cp, "actionPerformed:"));
      il.append(factory.createInvoke("java.lang.StringBuffer", "<init>", Type.VOID,
             new Type[] {Type.STRING}, Constants.INVOKESPECIAL));
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       iList.append( bi );
      
       // create the delegate
       iList.append( InstructionFactory.createLoad( Type.OBJECT, 0 ) );
      
       iList.append( factory.createNew( implClass.getName() ) );
       iList.append( InstructionConstants.DUP );
       iList.append(
           factory.createInvoke(
               implClass.getName(),
               Constants.CONSTRUCTOR_NAME,
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            il.append(InstructionConstants.ACONST_NULL);
        }
        else
        {
            // new ClassConstrutor()
            il.append(factory.createNew(new ObjectType(className)));
            il.append(InstructionConstants.DUP);
            il.append(factory.createInvoke(className, Constants.CONSTRUCTOR_NAME, Type.VOID, Type.NO_ARGS, Constants.INVOKESPECIAL));
        }
        il.append(factory.createInvoke(CN_JDOImplHelper, "registerClass", Type.VOID, new Type[]{OT_CLASS, new ArrayType(Type.STRING, 1),
                new ArrayType(OT_CLASS, 1), new ArrayType(Type.BYTE, 1), OT_CLASS, OT_PersistenceCapable}, Constants.INVOKESTATIC));
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        // if not continuation exists, create empty stack
        insList.insert(new GOTO(firstIns));
        insList.insert(InstructionFactory.createStore(STACK_TYPE, method.getMaxLocals()+1));
        insList.insert(insFactory.createInvoke(STACK_CLASS, Constants.CONSTRUCTOR_NAME, Type.VOID, Type.NO_ARGS, Constants. INVOKESPECIAL));
        insList.insert(InstructionFactory.createDup(STACK_TYPE.getSize()));
        insList.insert(insFactory.createNew(STACK_TYPE));

        // test if no current continuation exists
        insList.insert(new IFNONNULL(restore_handle));
        insList.insert(InstructionFactory.createLoad(CONTINUATION_TYPE, method.getMaxLocals()));
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            } else if (type instanceof ReferenceType) {
                insList.append(insFactory.createInvoke(STACK_CLASS, getPushMethod(Type.OBJECT), Type.VOID, new Type[]{Type.OBJECT}, Constants.INVOKEVIRTUAL));
            }
        }
        // create uninitialzed object
        insList.append(insFactory.createNew(objecttype));
        insList.append(InstructionFactory.createDup(objecttype.getSize()));
        // return the arguments into the stack
        for (int i = 0; i < arguments.length; i++) {
            Type type = arguments[i];
            insList.append(InstructionFactory.createLoad(STACK_TYPE, method.getMaxLocals()+1));
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        InstructionHandle tryEnd = mf.append(jumpOut);

        String exceptionClassName = ApplicationRuntimeException.class.getName();

        InstructionHandle catchHandle = mf.append(factory.createNew(exceptionClassName));

        // This stuff can make my head spin, so let's map it out a little.
        // CCE = ClassCastException, ARE = ApplicationRuntimeException

        // Stack: CCE, ARE --> ARE, CCE, ARE
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        // if not continuation exists, create empty stack
        insList.insert(new GOTO(firstIns));
        insList.insert(InstructionFactory.createStore(STACK_TYPE, method.getMaxLocals()+1));
        insList.insert(insFactory.createInvoke(STACK_CLASS, Constants.CONSTRUCTOR_NAME, Type.VOID, Type.NO_ARGS, Constants. INVOKESPECIAL));
        insList.insert(InstructionFactory.createDup(STACK_TYPE.getSize()));
        insList.insert(insFactory.createNew(STACK_TYPE));

        // test if no current continuation exists
        insList.insert(new IFNONNULL(restore_handle));
        insList.insert(InstructionFactory.createLoad(CONTINUATION_TYPE, method.getMaxLocals()));
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