Package org.apache.bcel.generic

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

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        InstructionFactory fac = new InstructionFactory(stubClass, cp);

        // call super-constructor
        il.append(InstructionFactory.createThis());
        il.append(fac.createInvoke(stubClass.getSuperclassName(), "<init>",
                Type.VOID, Type.NO_ARGS, Constants.INVOKESPECIAL));

        // push "this"
        il.append(InstructionFactory.createThis());
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        InstructionFactory fac = new InstructionFactory(stubClass, cp);

        // call super-constructor
        il.append(InstructionFactory.createThis());
        il.append(fac.createInvoke(stubClass.getSuperclassName(), "<init>",
                Type.VOID, Type.NO_ARGS, Constants.INVOKESPECIAL));

        // push this again...
        il.append(InstructionFactory.createThis());
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    il.append(factory.createFieldAccess("java.lang.System", "in", i_stream,
          Constants.GETSTATIC));

    /* Call constructors, i.e. BufferedReader(InputStreamReader())
     */
    il.append(factory.createInvoke("java.io.InputStreamReader", "<init>",
           Type.VOID, new Type[] { i_stream },
           Constants.INVOKESPECIAL));
    il.append(factory.createInvoke("java.io.BufferedReader", "<init>", Type.VOID,
           new Type[] { new ObjectType("java.io.Reader") },
           Constants.INVOKESPECIAL));
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    /* Call constructors, i.e. BufferedReader(InputStreamReader())
     */
    il.append(factory.createInvoke("java.io.InputStreamReader", "<init>",
           Type.VOID, new Type[] { i_stream },
           Constants.INVOKESPECIAL));
    il.append(factory.createInvoke("java.io.BufferedReader", "<init>", Type.VOID,
           new Type[] { new ObjectType("java.io.Reader") },
           Constants.INVOKESPECIAL));

    /* Create local variable `in'
     */
 
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    InstructionHandle try_start =
      il.append(factory.createFieldAccess("java.lang.System", "out", p_stream,
            Constants.GETSTATIC));

    il.append(new PUSH(cp, "Please enter your name> "));
    il.append(factory.createInvoke("java.io.PrintStream", "print", Type.VOID,
           new Type[] { Type.STRING }, Constants.INVOKEVIRTUAL));
    il.append(new ALOAD(in));
    il.append(factory.createInvoke("java.io.BufferedReader", "readLine",
           Type.STRING, Type.NO_ARGS, Constants.INVOKEVIRTUAL));
    il.append(new ASTORE(name));
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    il.append(new PUSH(cp, "Please enter your name> "));
    il.append(factory.createInvoke("java.io.PrintStream", "print", Type.VOID,
           new Type[] { Type.STRING }, Constants.INVOKEVIRTUAL));
    il.append(new ALOAD(in));
    il.append(factory.createInvoke("java.io.BufferedReader", "readLine",
           Type.STRING, Type.NO_ARGS, Constants.INVOKEVIRTUAL));
    il.append(new ASTORE(name));

    /* Upon normal execution we jump behind exception handler,
     * the target address is not known yet.
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      il.append(factory.createFieldAccess("java.lang.System", "out", p_stream,
            Constants.GETSTATIC));
    // Little trick in order not to save exception object temporarily
    il.append(InstructionConstants.SWAP);

    il.append(factory.createInvoke("java.io.PrintStream", "println", Type.VOID,
     new Type[] { Type.OBJECT }, Constants.INVOKEVIRTUAL));
    il.append(InstructionConstants.RETURN);
    mg.addExceptionHandler(try_start, try_end, handler,
         new ObjectType("java.io.IOException"));
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    /* 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));
    il.append(new ALOAD(name));
   
    /* Concatenate strings using a StringBuffer and print them.
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           Constants.INVOKESPECIAL));
    il.append(new ALOAD(name));
   
    /* Concatenate strings using a StringBuffer and print them.
     */
    il.append(factory.createInvoke("java.lang.StringBuffer", "append",
           Type.STRINGBUFFER, new Type[] { Type.STRING },
           Constants.INVOKEVIRTUAL));
    il.append(factory.createInvoke("java.lang.StringBuffer", "toString",
           Type.STRING, Type.NO_ARGS,
           Constants.INVOKEVIRTUAL));
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    /* Concatenate strings using a StringBuffer and print them.
     */
    il.append(factory.createInvoke("java.lang.StringBuffer", "append",
           Type.STRINGBUFFER, new Type[] { Type.STRING },
           Constants.INVOKEVIRTUAL));
    il.append(factory.createInvoke("java.lang.StringBuffer", "toString",
           Type.STRING, Type.NO_ARGS,
           Constants.INVOKEVIRTUAL));
   
    il.append(factory.createInvoke("java.io.PrintStream", "println",
           Type.VOID, new Type[] { Type.STRING },
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