Examples of org.apache.hadoop.hive.serde2.objectinspector.StandardStructObjectInspector

Package org.apache.hadoop.hive.serde2.objectinspector

Examples of org.apache.hadoop.hive.serde2.objectinspector.StandardStructObjectInspector

org.apache.hadoop.hive.serde2.objectinspector.StandardStructObjectInspector
ListStructObjectInspector works on struct data that is stored as a Java List or Java Array object. Basically, the fields are stored sequentially in the List object. The names of the struct fields and the internal structure of the struct fields are specified in the ctor of the StructObjectInspector. Always use the ObjectInspectorFactory to create new ObjectInspector objects, instead of directly creating an instance of this class.


    AvroDeserializer de = new AvroDeserializer();
    ArrayList<Object> row =
            (ArrayList<Object>)de.deserialize(aoig.getColumnNames(), aoig.getColumnTypes(), garw, s);
    assertEquals(1, row.size());
    StandardStructObjectInspector oi = (StandardStructObjectInspector)aoig.getObjectInspector();
    List<? extends StructField> fieldRefs = oi.getAllStructFieldRefs();
    assertEquals(1, fieldRefs.size());
    StructField fieldRef = fieldRefs.get(0);


    assertEquals("baddies", fieldRef.getFieldName());


    Object theStringObject = oi.getStructFieldData(row, fieldRef);
    assertTrue(fieldRef.getFieldObjectInspector() instanceof StringObjectInspector);
    StringObjectInspector soi = (StringObjectInspector)fieldRef.getFieldObjectInspector();


    String finalValue = soi.getPrimitiveJavaObject(theStringObject);
    assertEquals("DALEKS", finalValue);

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    for(int i = 0; i < bytes.length; i++) {
      assertEquals(bytes[i], outBytes[i]);
    }


    // Now go the correct way, through objectinspectors
    StandardStructObjectInspector oi = (StandardStructObjectInspector)aoig.getObjectInspector();
    List<Object> fieldsDataAsList = oi.getStructFieldsDataAsList(row);
    assertEquals(1, fieldsDataAsList.size());
    StructField fieldRef = oi.getStructFieldRef("hash");


    outBytes = (byte[]) oi.getStructFieldData(row, fieldRef);
    for(int i = 0; i < outBytes.length; i++) {
      assertEquals(bytes[i], outBytes[i]);
    }
  }

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    for(int i = 0; i < bytes.length; i++) {
      assertEquals(bytes[i], outBytes[i]);
    }


    // Now go the correct way, through objectinspectors
    StandardStructObjectInspector oi = (StandardStructObjectInspector)aoig.getObjectInspector();
    List<Object> fieldsDataAsList = oi.getStructFieldsDataAsList(row);
    assertEquals(1, fieldsDataAsList.size());
    StructField fieldRef = oi.getStructFieldRef("bytesField");


    outBytes = (byte[]) oi.getStructFieldData(row, fieldRef);
    for(int i = 0; i < outBytes.length; i++) {
      assertEquals(bytes[i], outBytes[i]);
    }
  }

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    assertEquals(3l, theMap.get("three"));
    assertTrue(theMap.containsKey("mu"));
    assertEquals(null, theMap.get("mu"));


    // Verify that the provided object inspector can pull out these same values
    StandardStructObjectInspector oi =
            (StandardStructObjectInspector)aoig.getObjectInspector();


    List<Object> z = oi.getStructFieldsDataAsList(row);
    assertEquals(1, z.size());
    StructField fieldRef = oi.getStructFieldRef("amap");


    Map theMap2 = (Map)oi.getStructFieldData(row, fieldRef);
    assertEquals(1l, theMap2.get("one"));
    assertEquals(2l, theMap2.get("two"));
    assertEquals(3l, theMap2.get("three"));
    assertTrue(theMap2.containsKey("mu"));
    assertEquals(null, theMap2.get("mu"));

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    assertEquals(1l, theMap.get("one"));
    assertEquals(2l, theMap.get("two"));
    assertEquals(3l, theMap.get("three"));


    // Verify that the provided object inspector can pull out these same values
    StandardStructObjectInspector oi =
            (StandardStructObjectInspector)aoig.getObjectInspector();


    List<Object> z = oi.getStructFieldsDataAsList(row);
    assertEquals(1, z.size());
    StructField fieldRef = oi.getStructFieldRef("amap");


    Map theMap2 = (Map)oi.getStructFieldData(row, fieldRef);
    assertEquals(1l, theMap2.get("one"));
    assertEquals(2l, theMap2.get("two"));
    assertEquals(3l, theMap2.get("three"));
  }

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    ArrayList<Object> row =
            (ArrayList<Object>)de.deserialize(aoig.getColumnNames(), aoig.getColumnTypes(), garw, s);
    assertEquals(1, row.size());
    Object rowElement = row.get(0);


    StandardStructObjectInspector oi = (StandardStructObjectInspector)aoig.getObjectInspector();
    List<Object> fieldsDataAsList = oi.getStructFieldsDataAsList(row);
    assertEquals(1, fieldsDataAsList.size());
    StructField fieldRef = oi.getStructFieldRef(fieldName);
    ObjectInspector fieldObjectInspector = fieldRef.getFieldObjectInspector();
    StringObjectInspector soi = (StringObjectInspector)fieldObjectInspector;


    if(expected == null) {
      assertNull(soi.getPrimitiveJavaObject(rowElement));

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            aoig.getColumnTypes(), garw, s);
    assertEquals(1, row.size());
    Object theVoidObject = row.get(0);
    assertNull(theVoidObject);


    StandardStructObjectInspector oi = (StandardStructObjectInspector)aoig.getObjectInspector();
    StructField fieldRef = oi.getStructFieldRef("isANull");


    Object shouldBeNull = oi.getStructFieldData(row, fieldRef);
    assertNull(shouldBeNull);
    assertTrue(fieldRef.getFieldObjectInspector() instanceof VoidObjectInspector);
  }

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    assertEquals(1l, theMap.get("one"));
    assertEquals(2l, theMap.get("two"));
    assertEquals(3l, theMap.get("three"));


    // Verify that the provided object inspector can pull out these same values
    StandardStructObjectInspector oi =
            (StandardStructObjectInspector)aoig.getObjectInspector();


    List<Object> z = oi.getStructFieldsDataAsList(row);
    assertEquals(1, z.size());
    StructField fieldRef = oi.getStructFieldRef("amap");


    Map theMap2 = (Map)oi.getStructFieldData(row, fieldRef);
    assertEquals(1l, theMap2.get("one"));
    assertEquals(2l, theMap2.get("two"));
    assertEquals(3l, theMap2.get("three"));
  }

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    verifyColumnTypes(expectedColumnTypes, aoig.getColumnTypes());


    // Rip apart the object inspector, making sure we got what we expect.
    final ObjectInspector oi = aoig.getObjectInspector();
    assertTrue(oi instanceof StandardStructObjectInspector);
    final StandardStructObjectInspector ssoi = (StandardStructObjectInspector)oi;
    List<? extends StructField> structFields = ssoi.getAllStructFieldRefs();
    assertEquals(expectedColumnNames.length, structFields.size());


    for(int i = 0; i < expectedColumnNames.length;i++) {
      assertEquals("Column names don't match",
              expectedColumnNames[i].toLowerCase(), structFields.get(i).getFieldName());

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    ObjectInspector[] colOIs = new ObjectInspector[inputCols.size()];
    for (int i = 0; i < inputCols.size(); i++) {
      colNames.add(inputCols.get(i).getInternalName());
      colOIs[i] = inputCols.get(i).getObjectInspector();
    }
    StandardStructObjectInspector rowOI =
        ObjectInspectorFactory.getStandardStructObjectInspector(colNames, Arrays.asList(colOIs));
    StructObjectInspector outputOI = genericUDTF.initialize(rowOI);


    int numUdtfCols = outputOI.getAllStructFieldRefs().size();
    if (colAliases.isEmpty()) {

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