Examples of org.apache.pig.builtin.ROUND.exec()

org.apache.pig.builtin.ROUND.exec()
java level API @param input expects a single numeric value @return output returns a single numeric value, the closest long to the argument

        Tuple          tup     = TupleFactory.getInstance().newTuple(1);
        long           expected, lng_out;


        tup.set(0, dbl);
        expected = Math.round(dbl);
        lng_out   = rounder.exec(tup);
        assertEquals(expected, lng_out);


        tup.set(0, flt);
        expected = Math.round(flt);
        lng_out   = rounder.exec(tup);

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        lng_out   = rounder.exec(tup);
        assertEquals(expected, lng_out);


        tup.set(0, flt);
        expected = Math.round(flt);
        lng_out   = rounder.exec(tup);
        assertEquals(expected, lng_out);


        tup.set(0,  4.6d); assertEquals( 5l, lng_out = rounder.exec(tup));
        tup.set(0,  2.4d); assertEquals( 2l, lng_out = rounder.exec(tup));
        tup.set(0,  1.0d); assertEquals( 1l, lng_out = rounder.exec(tup));

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        tup.set(0, flt);
        expected = Math.round(flt);
        lng_out   = rounder.exec(tup);
        assertEquals(expected, lng_out);


        tup.set(0,  4.6d); assertEquals( 5l, lng_out = rounder.exec(tup));
        tup.set(0,  2.4d); assertEquals( 2l, lng_out = rounder.exec(tup));
        tup.set(0,  1.0d); assertEquals( 1l, lng_out = rounder.exec(tup));
        tup.set(0, -1.0d); assertEquals(-1l, lng_out = rounder.exec(tup));
        tup.set(0, -2.4d); assertEquals(-2l, lng_out = rounder.exec(tup));
        tup.set(0, -4.6d); assertEquals(-5l, lng_out = rounder.exec(tup));

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        expected = Math.round(flt);
        lng_out   = rounder.exec(tup);
        assertEquals(expected, lng_out);


        tup.set(0,  4.6d); assertEquals( 5l, lng_out = rounder.exec(tup));
        tup.set(0,  2.4d); assertEquals( 2l, lng_out = rounder.exec(tup));
        tup.set(0,  1.0d); assertEquals( 1l, lng_out = rounder.exec(tup));
        tup.set(0, -1.0d); assertEquals(-1l, lng_out = rounder.exec(tup));
        tup.set(0, -2.4d); assertEquals(-2l, lng_out = rounder.exec(tup));
        tup.set(0, -4.6d); assertEquals(-5l, lng_out = rounder.exec(tup));

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        lng_out   = rounder.exec(tup);
        assertEquals(expected, lng_out);


        tup.set(0,  4.6d); assertEquals( 5l, lng_out = rounder.exec(tup));
        tup.set(0,  2.4d); assertEquals( 2l, lng_out = rounder.exec(tup));
        tup.set(0,  1.0d); assertEquals( 1l, lng_out = rounder.exec(tup));
        tup.set(0, -1.0d); assertEquals(-1l, lng_out = rounder.exec(tup));
        tup.set(0, -2.4d); assertEquals(-2l, lng_out = rounder.exec(tup));
        tup.set(0, -4.6d); assertEquals(-5l, lng_out = rounder.exec(tup));


        // Rounds towards positive infinity: round(x) = floor(x + 0.5)

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        assertEquals(expected, lng_out);


        tup.set(0,  4.6d); assertEquals( 5l, lng_out = rounder.exec(tup));
        tup.set(0,  2.4d); assertEquals( 2l, lng_out = rounder.exec(tup));
        tup.set(0,  1.0d); assertEquals( 1l, lng_out = rounder.exec(tup));
        tup.set(0, -1.0d); assertEquals(-1l, lng_out = rounder.exec(tup));
        tup.set(0, -2.4d); assertEquals(-2l, lng_out = rounder.exec(tup));
        tup.set(0, -4.6d); assertEquals(-5l, lng_out = rounder.exec(tup));


        // Rounds towards positive infinity: round(x) = floor(x + 0.5)
        tup.set(0,  3.5d); assertEquals( 4l, lng_out = rounder.exec(tup));

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        tup.set(0,  4.6d); assertEquals( 5l, lng_out = rounder.exec(tup));
        tup.set(0,  2.4d); assertEquals( 2l, lng_out = rounder.exec(tup));
        tup.set(0,  1.0d); assertEquals( 1l, lng_out = rounder.exec(tup));
        tup.set(0, -1.0d); assertEquals(-1l, lng_out = rounder.exec(tup));
        tup.set(0, -2.4d); assertEquals(-2l, lng_out = rounder.exec(tup));
        tup.set(0, -4.6d); assertEquals(-5l, lng_out = rounder.exec(tup));


        // Rounds towards positive infinity: round(x) = floor(x + 0.5)
        tup.set(0,  3.5d); assertEquals( 4l, lng_out = rounder.exec(tup));
        tup.set(0, -3.5d); assertEquals(-3l, lng_out = rounder.exec(tup));

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        tup.set(0,  4.6d); assertEquals( 5l, lng_out = rounder.exec(tup));
        tup.set(0,  2.4d); assertEquals( 2l, lng_out = rounder.exec(tup));
        tup.set(0,  1.0d); assertEquals( 1l, lng_out = rounder.exec(tup));
        tup.set(0, -1.0d); assertEquals(-1l, lng_out = rounder.exec(tup));
        tup.set(0, -2.4d); assertEquals(-2l, lng_out = rounder.exec(tup));
        tup.set(0, -4.6d); assertEquals(-5l, lng_out = rounder.exec(tup));


        // Rounds towards positive infinity: round(x) = floor(x + 0.5)
        tup.set(0,  3.5d); assertEquals( 4l, lng_out = rounder.exec(tup));
        tup.set(0, -3.5d); assertEquals(-3l, lng_out = rounder.exec(tup));
        tup.set(0,  2.5d); assertEquals( 3l, lng_out = rounder.exec(tup));

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        tup.set(0, -1.0d); assertEquals(-1l, lng_out = rounder.exec(tup));
        tup.set(0, -2.4d); assertEquals(-2l, lng_out = rounder.exec(tup));
        tup.set(0, -4.6d); assertEquals(-5l, lng_out = rounder.exec(tup));


        // Rounds towards positive infinity: round(x) = floor(x + 0.5)
        tup.set(0,  3.5d); assertEquals( 4l, lng_out = rounder.exec(tup));
        tup.set(0, -3.5d); assertEquals(-3l, lng_out = rounder.exec(tup));
        tup.set(0,  2.5d); assertEquals( 3l, lng_out = rounder.exec(tup));
        tup.set(0, -2.5d); assertEquals(-2l, lng_out = rounder.exec(tup));


        // we don't need to test null input because of SKIP_UDF_CALL_FOR_NULL behavior

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        tup.set(0, -2.4d); assertEquals(-2l, lng_out = rounder.exec(tup));
        tup.set(0, -4.6d); assertEquals(-5l, lng_out = rounder.exec(tup));


        // Rounds towards positive infinity: round(x) = floor(x + 0.5)
        tup.set(0,  3.5d); assertEquals( 4l, lng_out = rounder.exec(tup));
        tup.set(0, -3.5d); assertEquals(-3l, lng_out = rounder.exec(tup));
        tup.set(0,  2.5d); assertEquals( 3l, lng_out = rounder.exec(tup));
        tup.set(0, -2.5d); assertEquals(-2l, lng_out = rounder.exec(tup));


        // we don't need to test null input because of SKIP_UDF_CALL_FOR_NULL behavior
    }

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