Examples of org.ow2.asm.MethodVisitor.visitMaxs()

org.ow2.asm.MethodVisitor.visitMaxs()
Visits the maximum stack size and the maximum number of local variables of the method. @param maxStack maximum stack size of the method. @param maxLocals maximum number of local variables for the method.

                "(ZBCSIFJDTE;)TE;",
                null);
        mv.visitCode();
        mv.visitInsn(ACONST_NULL);
        mv.visitInsn(ARETURN);
        mv.visitMaxs(0, 0);
        mv.visitEnd();


        // instruction types
        constInsns(cw);
        varInsns(cw);

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        mv.visitLdcInsn(new Double("128.0"));
        mv.visitLdcInsn("\n\r\u0009\"\\");
        mv.visitLdcInsn("\u1111\u1111\u1111\u1111\u1111\u1111\u1111\u1111\u1111\u1111\u1111\u1111\u1111\u1111\u1111\u1111\u1111\u1111\u1111\u1111\u1111\u1111\u1111\u1111\u1111\u1111\u1111\u1111\u1111\u1111\u1111\u1111\u1111\u1111\u1111\u1111\u1111\u1111\u1111\u1111\u1111\u1111\u1111\u1111\u1111\u1111\u1111\u1111\u1111\u1111\u1111\u1111\u1111\u1111\u1111\u1111\u1111\u1111\u1111\u1111\u1111\u1111\u1111\u1111\u1111\u1111\u1111\u1111\u1111\u0111\u0011\u0001");
        mv.visitLdcInsn(Type.getType("Ljava/lang/Object;"));
        mv.visitInsn(RETURN);
        mv.visitMaxs(0, 0);
        mv.visitEnd();
    }


    private void varInsns(final ClassWriter cw) {
        MethodVisitor mv = cw.visitMethod(ACC_PUBLIC,

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        mv.visitInsn(ICONST_0);
        mv.visitVarInsn(ISTORE, 3);
        mv.visitInsn(LCONST_0);
        mv.visitVarInsn(LSTORE, 6);
        mv.visitInsn(RETURN);
        mv.visitMaxs(0, 0);
        mv.visitEnd();
    }


    private void arrayInsns(final ClassWriter cw) {
        MethodVisitor mv = cw.visitMethod(ACC_PUBLIC,

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        mv.visitMultiANewArrayInsn("[[[I", 3);
        // array length
        mv.visitInsn(ARRAYLENGTH);
        // end method
        mv.visitInsn(RETURN);
        mv.visitMaxs(0, 0);
        mv.visitEnd();
    }


    private void stackInsns(final ClassWriter cw) {
        MethodVisitor mv = cw.visitMethod(ACC_PUBLIC,

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        mv.visitInsn(ICONST_0);
        mv.visitInsn(ICONST_1);
        mv.visitInsn(SWAP);
        // end method
        mv.visitInsn(RETURN);
        mv.visitMaxs(0, 0);
        mv.visitEnd();
    }


    private void mathInsns(final ClassWriter cw) {
        MethodVisitor mv = cw.visitMethod(ACC_PUBLIC,

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                "println",
                "(Ljava/lang/String;)V");
        mw.visitInsn(RETURN);
        // this code uses a maximum of two stack elements and two local
        // variables
        mw.visitMaxs(2, 2);
        mw.visitEnd();


        // gets the bytecode of the Example class, and loads it dynamically
        byte[] code = cw.toByteArray();

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                null,
                null);
        mv.visitVarInsn(ALOAD, 0);
        mv.visitMethodInsn(INVOKESPECIAL, "java/lang/Object", "<init>", "()V");
        mv.visitInsn(RETURN);
        mv.visitMaxs(1, 1);
        mv.visitEnd();


        // eval method
        mv = cw.visitMethod(ACC_PUBLIC, "eval", "(II)I", null, null);
        compile(mv);

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        // eval method
        mv = cw.visitMethod(ACC_PUBLIC, "eval", "(II)I", null, null);
        compile(mv);
        mv.visitInsn(IRETURN);
        // max stack and max locals automatically computed
        mv.visitMaxs(0, 0);
        mv.visitEnd();


        return cw.toByteArray();
    }

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                    "println",
                    "(Ljava/lang/String;)V");
            gv.visitVarInsn(ALOAD, 0);
            gv.visitFieldInsn(GETFIELD, owner, name, desc);
            gv.visitInsn(t.getOpcode(IRETURN));
            gv.visitMaxs(1 + size, 1);
            gv.visitEnd();


            // generates setter method
            String sDesc = "(" + desc + ")V";
            MethodVisitor sv = cv.visitMethod(ACC_PRIVATE,

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                    "(Ljava/lang/String;)V");
            sv.visitVarInsn(ALOAD, 0);
            sv.visitVarInsn(t.getOpcode(ILOAD), 1);
            sv.visitFieldInsn(PUTFIELD, owner, name, desc);
            sv.visitInsn(RETURN);
            sv.visitMaxs(1 + size, 1 + size);
            sv.visitEnd();
        }
        return fv;
    }

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