/tags/release-0.0.0-rc0/hive/external/serde/src/java/org/apache/hadoop/hive/serde2/dynamic_type/DynamicSerDeTypeSet.java
Java | 129 lines | 78 code | 17 blank | 34 comment | 7 complexity | e073af46019f3fefce4a43c0b78193a3 MD5 | raw file
Possible License(s): Apache-2.0, BSD-3-Clause, JSON, CPL-1.0
- /**
- * Licensed to the Apache Software Foundation (ASF) under one
- * or more contributor license agreements. See the NOTICE file
- * distributed with this work for additional information
- * regarding copyright ownership. The ASF licenses this file
- * to you under the Apache License, Version 2.0 (the
- * "License"); you may not use this file except in compliance
- * with the License. You may obtain a copy of the License at
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
- package org.apache.hadoop.hive.serde2.dynamic_type;
- import java.util.Collections;
- import java.util.HashSet;
- import java.util.Set;
- import org.apache.hadoop.hive.serde2.SerDeException;
- import org.apache.hadoop.hive.serde2.objectinspector.ListObjectInspector;
- import org.apache.hadoop.hive.serde2.objectinspector.ObjectInspector;
- import org.apache.thrift.TException;
- import org.apache.thrift.protocol.TProtocol;
- import org.apache.thrift.protocol.TSet;
- import org.apache.thrift.protocol.TType;
- /**
- * DynamicSerDeTypeSet.
- *
- */
- public class DynamicSerDeTypeSet extends DynamicSerDeTypeBase {
- // production is: set<FieldType()>
- private static final int FD_TYPE = 0;
- public DynamicSerDeTypeSet(int i) {
- super(i);
- }
- public DynamicSerDeTypeSet(thrift_grammar p, int i) {
- super(p, i);
- }
- // returns Set<?>
- @Override
- public Class getRealType() {
- try {
- Class c = getElementType().getRealType();
- Object o = c.newInstance();
- Set<?> l = Collections.singleton(o);
- return l.getClass();
- } catch (Exception e) {
- e.printStackTrace();
- throw new RuntimeException(e);
- }
- }
- public DynamicSerDeTypeBase getElementType() {
- return ((DynamicSerDeFieldType) jjtGetChild(FD_TYPE)).getMyType();
- }
- @Override
- public String toString() {
- return "set<" + getElementType().toString() + ">";
- }
- @Override
- public byte getType() {
- return TType.SET;
- }
- /**
- * NOTE: Set is not supported by Hive yet.
- */
- @Override
- public Object deserialize(Object reuse, TProtocol iprot)
- throws SerDeException, TException, IllegalAccessException {
- TSet theset = iprot.readSetBegin();
- if (theset == null) {
- return null;
- }
- Set<Object> result;
- if (reuse != null) {
- result = (Set<Object>) reuse;
- result.clear();
- } else {
- result = new HashSet<Object>();
- }
- for (int i = 0; i < theset.size; i++) {
- Object elem = getElementType().deserialize(null, iprot);
- result.add(elem);
- }
- // in theory, the below call isn't needed in non thrift_mode, but let's not
- // get too crazy
- iprot.readSetEnd();
- return result;
- }
- /**
- * NOTE: Set is not supported by Hive yet. The code uses ListObjectInspector
- * right now. We need to change it to SetObjectInspector when that is done.
- */
- TSet tset = null;
- @Override
- public void serialize(Object o, ObjectInspector oi, TProtocol oprot)
- throws TException, SerDeException, NoSuchFieldException, IllegalAccessException {
- ListObjectInspector loi = (ListObjectInspector) oi;
- Set<Object> set = (Set<Object>) o;
- DynamicSerDeTypeBase mt = getElementType();
- tset = new TSet(mt.getType(), set.size());
- oprot.writeSetBegin(tset);
- for (Object element : set) {
- mt.serialize(element, loi.getListElementObjectInspector(), oprot);
- }
- // in theory, the below call isn't needed in non thrift_mode, but let's not
- // get too crazy
- oprot.writeSetEnd();
- }
- }