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.

    List<String> newNames = new ArrayList<String>(length);
    for (int i = 0; i < length; i++) {
      String tmp = new String("tmp_" + i);
      newNames.add(tmp);
    }
    StandardStructObjectInspector standardOI = ObjectInspectorFactory
        .getStandardStructObjectInspector(newNames, newFields);


    int alias = Integer.valueOf(metadataValueTag[tag]);
    metadata.put(Integer.valueOf(metadataValueTag[tag]), new HashTableSinkObjectCtx(
        standardOI, valueSerDe, valueTableDesc, hasFilter(alias), hconf));

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  }


  @Override
  public void processOp(Object row, int tag) throws HiveException {
    // The UDTF expects arguments in an object[]
    StandardStructObjectInspector soi = (StandardStructObjectInspector) inputObjInspectors[tag];
    List<? extends StructField> fields = soi.getAllStructFieldRefs();


    for (int i = 0; i < fields.size(); i++) {
      objToSendToUDTF[i] = soi.getStructFieldData(row, fields.get(i));
    }


    conf.getGenericUDTF().process(objToSendToUDTF);


  }

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        }
      }


      // Add the value to the vector
      // if join-key is null, process each row in different group.
      StandardStructObjectInspector inspector =
          (StandardStructObjectInspector) sf.getFieldObjectInspector();
      if (SerDeUtils.hasAnyNullObject(keyObject, inspector, nullsafes)) {
        endGroup();
        startGroup();
      }

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        List<String> colNames = new ArrayList<String>();
        for (ColumnInfo colInfo: gbyOp.getSchema().getSignature()) {
          colNames.add(colInfo.getInternalName());
        }
        StandardStructObjectInspector sOI = ObjectInspectorFactory.
            getStandardStructObjectInspector(colNames, ois);
        FetchWork fWork = new FetchWork(allRows, sOI);
        FetchTask fTask = (FetchTask)TaskFactory.get(fWork, pctx.getConf());
        fWork.setLimit(allRows.size());
        pctx.setFetchTask(fTask);

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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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  @Override
  public Writable serialize(Object obj, ObjectInspector oi)
      throws SerDeException {


    StandardStructObjectInspector structOI = (StandardStructObjectInspector) oi;


    // get list of writables, one for each field in the row
    List<Object> fieldWritables = structOI.getStructFieldsDataAsList(obj);


    StringWriter writer = new StringWriter();


    try {
      JsonGenerator jsonGen = jsonFactory.createJsonGenerator(writer);

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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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    assertEquals("Eccleston", theList.get(0));
    assertEquals("Tennant", theList.get(1));
    assertEquals("Smith", theList.get(2));


    // Now go the correct way, through objectinspectors
    StandardStructObjectInspector oi =
            (StandardStructObjectInspector)aoig.getObjectInspector();
    StructField fieldRefToArray = oi.getStructFieldRef("anArray");


    Object anArrayData = oi.getStructFieldData(row, fieldRefToArray);
    StandardListObjectInspector anArrayOI =
            (StandardListObjectInspector)fieldRefToArray.getFieldObjectInspector();
    assertEquals(3, anArrayOI.getListLength(anArrayData));


    JavaStringObjectInspector elementOI =

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    Object theRecordObject = row.get(0);
    System.out.println("theRecordObject = " + theRecordObject.getClass().getCanonicalName());


    // The original record was lost in the deserialization, so just go the
    // correct way, through objectinspectors
    StandardStructObjectInspector oi = (StandardStructObjectInspector)aoig.getObjectInspector();
    List<? extends StructField> allStructFieldRefs = oi.getAllStructFieldRefs();
    assertEquals(1, allStructFieldRefs.size());
    StructField fieldRefForaRecord = allStructFieldRefs.get(0);
    assertEquals("arecord", fieldRefForaRecord.getFieldName());
    Object innerRecord2 = oi.getStructFieldData(row, fieldRefForaRecord);


    // Extract innerRecord field refs
    StandardStructObjectInspector innerRecord2OI =
            (StandardStructObjectInspector) fieldRefForaRecord.getFieldObjectInspector();


    List<? extends StructField> allStructFieldRefs1 = innerRecord2OI.getAllStructFieldRefs();
    assertEquals(3, allStructFieldRefs1.size());
    assertEquals("int1", allStructFieldRefs1.get(0).getFieldName());
    assertEquals("boolean1", allStructFieldRefs1.get(1).getFieldName());
    assertEquals("long1", allStructFieldRefs1.get(2).getFieldName());


    innerRecord2OI.getStructFieldsDataAsList(innerRecord2);
    assertEquals(42, innerRecord2OI.getStructFieldData(innerRecord2, allStructFieldRefs1.get(0)));
    assertEquals(true, innerRecord2OI.getStructFieldData(innerRecord2, allStructFieldRefs1.get(1)));
    assertEquals(42432234234l, innerRecord2OI.getStructFieldData(innerRecord2, allStructFieldRefs1.get(2)));
  }

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