Examples of org.apache.pig.builtin.INVERSEMAP

org.apache.pig.builtin.INVERSEMAP
This UDF accepts a Map as input with values of any primitive data type.
UDF swaps keys with values and returns the new inverse Map.
Note in case original values are non-unique, the resulting Map would
contain String Key -> DataBag of values. Here the bag of values is composed
of the original keys having the same value.
```
 Note: 1. UDF accepts Map with Values of primitive data type 2. UDF returns Map  grunt> cat 1data [open#1,1#2,11#2] [apache#2,3#4,12#24] 
 grunt> a = load 'data' as (M:[int]); grunt> b = foreach a generate INVERSEMAP($0); grunt> dump b; ([2#{(1),(11)},apache#{(open)}]) ([hadoop#{(apache),(12)},4#{(3)}])  
```

        m.put("floating", new Float(100.012));
        m.put("long", new Long(10000000000000l));
        m.put("boolean", true);
        Tuple input = TupleFactory.getInstance().newTuple(m);


        INVERSEMAP inverseMap = new INVERSEMAP();
        Map inverse  = inverseMap.exec(input);
        assertEquals(inverse.size(), 7);
        assertTrue(inverse.containsKey("apache"));
        assertTrue(inverse.containsKey("hadoop"));
        assertTrue(inverse.containsKey("pig"));
        assertTrue(inverse.containsKey("100"));
        assertTrue(inverse.containsKey("true"));
        assertTrue(inverse.containsKey("100.012"));


        //Test when values are non-unique
        m.clear();
        m.put("open", "apache");
        m.put("1", "hadoop");
        m.put("source", "apache");
        input.set(0, m);
        inverse = inverseMap.exec(input);
        assertEquals(inverse.size(), 2);
        assertTrue(inverse.containsKey("apache"));
        assertTrue(inverse.containsKey("hadoop"));


        DataBag bag = (DataBag)inverse.get("apache");

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        m.put("floating", new Float(100.012));
        m.put("long", new Long(10000000000000l));
        m.put("boolean", true);
        Tuple input = TupleFactory.getInstance().newTuple(m);


        INVERSEMAP inverseMap = new INVERSEMAP();
        Map inverse  = inverseMap.exec(input);
        assertEquals(inverse.size(), 7);
        assertTrue(inverse.containsKey("apache"));
        assertTrue(inverse.containsKey("hadoop"));
        assertTrue(inverse.containsKey("pig"));
        assertTrue(inverse.containsKey("100"));
        assertTrue(inverse.containsKey("true"));
        assertTrue(inverse.containsKey("100.012"));


        //Test when values are non-unique
        m.clear();
        m.put("open", "apache");
        m.put("1", "hadoop");
        m.put("source", "apache");
        input.set(0, m);
        inverse = inverseMap.exec(input);
        assertEquals(inverse.size(), 2);
        assertTrue(inverse.containsKey("apache"));
        assertTrue(inverse.containsKey("hadoop"));


        DataBag bag = (DataBag)inverse.get("apache");

View Full Code Here

        m.put("floating", new Float(100.012));
        m.put("long", new Long(10000000000000l));
        m.put("boolean", true);
        Tuple input = TupleFactory.getInstance().newTuple(m);


        INVERSEMAP inverseMap = new INVERSEMAP();
        Map inverse  = inverseMap.exec(input);
        assertEquals(inverse.size(), 7);
        assertTrue(inverse.containsKey("apache"));
        assertTrue(inverse.containsKey("hadoop"));
        assertTrue(inverse.containsKey("pig"));
        assertTrue(inverse.containsKey("100"));
        assertTrue(inverse.containsKey("true"));
        assertTrue(inverse.containsKey("100.012"));


        //Test when values are non-unique
        m.clear();
        m.put("open", "apache");
        m.put("1", "hadoop");
        m.put("source", "apache");
        input.set(0, m);
        inverse = inverseMap.exec(input);
        assertEquals(inverse.size(), 2);
        assertTrue(inverse.containsKey("apache"));
        assertTrue(inverse.containsKey("hadoop"));


        DataBag bag = (DataBag)inverse.get("apache");

View Full Code Here

        m.put("floating", new Float(100.012));
        m.put("long", new Long(10000000000000l));
        m.put("boolean", true);
        Tuple input = TupleFactory.getInstance().newTuple(m);


        INVERSEMAP inverseMap = new INVERSEMAP();
        Map inverse  = inverseMap.exec(input);
        assertEquals(inverse.size(), 7);
        assertTrue(inverse.containsKey("apache"));
        assertTrue(inverse.containsKey("hadoop"));
        assertTrue(inverse.containsKey("pig"));
        assertTrue(inverse.containsKey("100"));
        assertTrue(inverse.containsKey("true"));
        assertTrue(inverse.containsKey("100.012"));


        //Test when values are non-unique
        m.clear();
        m.put("open", "apache");
        m.put("1", "hadoop");
        m.put("source", "apache");
        input.set(0, m);
        inverse = inverseMap.exec(input);
        assertEquals(inverse.size(), 2);
        assertTrue(inverse.containsKey("apache"));
        assertTrue(inverse.containsKey("hadoop"));


        DataBag bag = (DataBag)inverse.get("apache");

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Related Classes of org.apache.pig.builtin.INVERSEMAP

org.apache.pig.data.DataBag

org.apache.pig.data.NonSpillableDataBag

org.apache.pig.impl.logicalLayer.schema.Schema

org.apache.pig.test.TestBuiltin

org.apache.pig.backend.executionengine.ExecException

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