/**
* 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();
}
}