Examples of org.objectweb.asm.MethodVisitor.visitInsn()

org.objectweb.asm.MethodVisitor.visitInsn()
Visits a zero operand instruction. @param opcode the opcode of the instruction to be visited. This opcode iseither NOP, ACONST_NULL, ICONST_M1, ICONST_0, ICONST_1, ICONST_2, ICONST_3, ICONST_4, ICONST_5, LCONST_0, LCONST_1, FCONST_0, FCONST_1, FCONST_2, DCONST_0, DCONST_1, IALOAD, LALOAD, FALOAD, DALOAD, AALOAD, BALOAD, CALOAD, SALOAD, IASTORE, LASTORE, FASTORE, DASTORE, AASTORE, BASTORE, CASTORE, SASTORE, POP, POP2, DUP, DUP_X1, DUP_X2, DUP2, DUP2_X1, DUP2_X2, SWAP, IADD, LADD, FADD, DADD, ISUB, LSUB, FSUB, DSUB, IMUL, LMUL, FMUL, DMUL, IDIV, LDIV, FDIV, DDIV, IREM, LREM, FREM, DREM, INEG, LNEG, FNEG, DNEG, ISHL, LSHL, ISHR, LSHR, IUSHR, LUSHR, IAND, LAND, IOR, LOR, IXOR, LXOR, I2L, I2F, I2D, L2I, L2F, L2D, F2I, F2L, F2D, D2I, D2L, D2F, I2B, I2C, I2S, LCMP, FCMPL, FCMPG, DCMPL, DCMPG, IRETURN, LRETURN, FRETURN, DRETURN, ARETURN, RETURN, ARRAYLENGTH, ATHROW, MONITORENTER, or MONITOREXIT.


        // GENERATE helper = new ExceptionHelper(this, target, source, lineNumber)
        methodVisitor.visitVarInsn(Opcodes.ALOAD, 0);


        methodVisitor.visitTypeInsn(Opcodes.NEW, helperType.getInternalName());
        methodVisitor.visitInsn(Opcodes.DUP);
        methodVisitor.visitVarInsn(Opcodes.ALOAD, 0);
        methodVisitor.visitVarInsn(Opcodes.ALOAD, 1);
        methodVisitor.visitVarInsn(Opcodes.ALOAD, 2);
        methodVisitor.visitVarInsn(Opcodes.ALOAD, 3);
        methodVisitor.visitMethodInsn(Opcodes.INVOKESPECIAL, helperType.getInternalName(), "<init>",

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        methodVisitor.visitFieldInsn(Opcodes.PUTFIELD, generatedType.getInternalName(), "helper",
                helperType.getDescriptor());


        // END helper = new ExceptionHelper(target)


        methodVisitor.visitInsn(Opcodes.RETURN);
        methodVisitor.visitMaxs(0, 0);
        methodVisitor.visitEnd();


        // END <init>(<type> target, ScriptSource source, Integer lineNumber)

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            methodVisitor.visitFieldInsn(Opcodes.GETFIELD, generatedType.getInternalName(), "helper",
                    helperType.getDescriptor());
            methodVisitor.visitMethodInsn(Opcodes.INVOKEVIRTUAL, helperType.getInternalName(), method.getName(),
                    methodDescriptor);


            methodVisitor.visitInsn(Opcodes.ARETURN);
            methodVisitor.visitMaxs(0, 0);
            methodVisitor.visitEnd();
            // END public <type> <method>() { return helper.<method>(); }
        }

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        // super()
        methodVisitor.visitVarInsn(Opcodes.ALOAD, 0);
        methodVisitor.visitMethodInsn(Opcodes.INVOKESPECIAL, superclassType.getInternalName(), "<init>",
                constructorDescriptor);


        methodVisitor.visitInsn(Opcodes.RETURN);
        methodVisitor.visitMaxs(0, 0);
        methodVisitor.visitEnd();


        // run() method

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        String runDesciptor = Type.getMethodDescriptor(Type.getType(Object.class), new Type[0]);
        methodVisitor = visitor.visitMethod(Opcodes.ACC_PUBLIC, "run", runDesciptor, null, new String[0]);
        methodVisitor.visitCode();


        // return null
        methodVisitor.visitInsn(Opcodes.ACONST_NULL);


        methodVisitor.visitInsn(Opcodes.ARETURN);
        methodVisitor.visitMaxs(0, 0);
        methodVisitor.visitEnd();

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        methodVisitor.visitCode();


        // return null
        methodVisitor.visitInsn(Opcodes.ACONST_NULL);


        methodVisitor.visitInsn(Opcodes.ARETURN);
        methodVisitor.visitMaxs(0, 0);
        methodVisitor.visitEnd();


        visitor.visitEnd();

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        MethodVisitor mv;
        mv = cw.visitMethod(Opcodes.ACC_PUBLIC, "<init>", "()V", null, null);
        mv.visitCode();
        mv.visitVarInsn(Opcodes.ALOAD, 0);
        mv.visitMethodInsn(Opcodes.INVOKESPECIAL, superClass, "<init>", "()V");
        mv.visitInsn(Opcodes.RETURN);
        mv.visitMaxs(0, 0);
        mv.visitEnd();
    }


    @Deprecated

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            mv.visitMethodInsn((useInterface) ? Opcodes.INVOKEINTERFACE : Opcodes.INVOKEVIRTUAL, type, method.getName(), descriptor);
        }


        BytecodeHelper.box(mv, method.getReturnType());
        if (method.getReturnType() == void.class) {
            mv.visitInsn(Opcodes.ACONST_NULL);
        }


        mv.visitInsn(Opcodes.ARETURN);
        mv.visitMaxs(0, 0);
        mv.visitEnd();

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        BytecodeHelper.box(mv, method.getReturnType());
        if (method.getReturnType() == void.class) {
            mv.visitInsn(Opcodes.ACONST_NULL);
        }


        mv.visitInsn(Opcodes.ARETURN);
        mv.visitMaxs(0, 0);
        mv.visitEnd();
    }


    private static void genInvokeWithFixedParams(ClassWriter cw, Method method) {

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                mv.visitMethodInsn((useInterface) ? Opcodes.INVOKEINTERFACE : Opcodes.INVOKEVIRTUAL, type, method.getName(), descriptor);
            }


            BytecodeHelper.box(mv, method.getReturnType());
            if (method.getReturnType() == void.class) {
                mv.visitInsn(Opcodes.ACONST_NULL);
            }


            mv.visitInsn(Opcodes.ARETURN);
            mv.visitMaxs(0, 0);
            mv.visitEnd();

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