KMeansTask.java

/***********************************************************************************************************************
 *
 * Copyright (C) 2010-2014 by the Stratosphere project (http://stratosphere.eu)
 *
 * 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 eu.stratosphere.streaming.examples.iterative.kmeans;

import eu.stratosphere.api.java.tuple.Tuple1;
import eu.stratosphere.streaming.api.invokable.UserTaskInvokable;
import eu.stratosphere.streaming.api.streamrecord.StreamRecord;

public class KMeansTask extends UserTaskInvokable {

	private static final long serialVersionUID = 1L;
	private StreamRecord outRecord = new StreamRecord(new Tuple1<String>());
	private double[] point=null;
	public KMeansTask(int dimension){
		point = new double[dimension];
	}
	
	@Override
	public void invoke(StreamRecord record) throws Exception {
		// TODO Auto-generated method stub
		String[] pointStr = record.getString(0, 0).split(" ");
		for(int i=0; i<pointStr.length; ++i){
			point[i]=Double.valueOf(pointStr[i]);
		}
		outRecord.setString(0, record.getString(0, 0));
		emit(outRecord);
	}

}