com.hazelcast.mapreduce.impl.CombinerResultList Maven / Gradle / Ivy
/*
* Copyright (c) 2008-2014, Hazelcast, Inc. All Rights Reserved.
*
* Licensed 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 com.hazelcast.mapreduce.impl;
import com.hazelcast.nio.ObjectDataInput;
import com.hazelcast.nio.ObjectDataOutput;
import com.hazelcast.nio.serialization.IdentifiedDataSerializable;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Collection;
/**
* This {@link java.util.ArrayList} subclass exists to prevent
* {@link com.hazelcast.mapreduce.impl.task.DefaultContext.CollectingCombinerFactory}
* created collections to be mixed up with user provided List results from
* {@link com.hazelcast.mapreduce.Combiner}s.
* @param element type of the collection
*/
public class CombinerResultList extends ArrayList
implements IdentifiedDataSerializable {
public CombinerResultList() {
super();
}
public CombinerResultList(Collection c) {
super(c);
}
@Override
public int getFactoryId() {
return MapReduceDataSerializerHook.F_ID;
}
@Override
public int getId() {
return MapReduceDataSerializerHook.COMBINER_RESULT_LIST;
}
@Override
public void writeData(ObjectDataOutput out)
throws IOException {
int size = size();
out.writeInt(size);
for (int i = 0; i < size; i++) {
out.writeObject(get(i));
}
}
@Override
public void readData(ObjectDataInput in)
throws IOException {
int size = in.readInt();
for (int i = 0; i < size; i++) {
add(i, (E) in.readObject());
}
}
}