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/tags/release-0.1-rc2/hive/external/serde/src/java/org/apache/hadoop/hive/serde2/objectinspector/UnionObjectInspector.java

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Java | 49 lines | 7 code | 7 blank | 35 comment | 0 complexity | c6df0fa2e6ea452e745b7fe1547f2c00 MD5 | raw file
 1/**
 2 * Licensed to the Apache Software Foundation (ASF) under one
 3 * or more contributor license agreements.  See the NOTICE file
 4 * distributed with this work for additional information
 5 * regarding copyright ownership.  The ASF licenses this file
 6 * to you under the Apache License, Version 2.0 (the
 7 * "License"); you may not use this file except in compliance
 8 * with the License.  You may obtain a copy of the License at
 9 *
10 *     http://www.apache.org/licenses/LICENSE-2.0
11 *
12 * Unless required by applicable law or agreed to in writing, software
13 * distributed under the License is distributed on an "AS IS" BASIS,
14 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15 * See the License for the specific language governing permissions and
16 * limitations under the License.
17 */
18
19package org.apache.hadoop.hive.serde2.objectinspector;
20
21import java.util.List;
22
23/**
24 * UnionObjectInspector works on union data that is stored as UnionObject.
25 *
26 * It holds the list of the object inspectors corresponding to each type of the
27 * object the Union can hold.
28 *
29 * UnionObjectInspector.
30 *
31 */
32public interface UnionObjectInspector extends ObjectInspector {
33
34  /**
35   *  Returns the array of ObjectInspectors that are for each of the tags.
36   */
37  List<ObjectInspector> getObjectInspectors();
38
39  /**
40   *   Return the tag of the object.
41   */
42  byte getTag(Object o);
43
44  /**
45   *  Return the field based on the tag associated with the Object.
46   */
47  Object getField(Object o);
48
49}