/***********************************************************************************************************************
 * Copyright (C) 2010-2013 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.test.iterative;

import java.util.ArrayList;
import java.util.List;

import eu.stratosphere.api.common.Plan;
import eu.stratosphere.test.recordJobs.kmeans.KMeansBroadcast;
import eu.stratosphere.test.testdata.KMeansData;
import eu.stratosphere.test.util.RecordAPITestBase;


public class KMeansITCase extends RecordAPITestBase {

	protected String dataPath;
	protected String clusterPath;
	protected String resultPath;
	
	@Override
	protected void preSubmit() throws Exception {
		dataPath = createTempFile("datapoints.txt", KMeansData.DATAPOINTS);
		clusterPath = createTempFile("initial_centers.txt", KMeansData.INITIAL_CENTERS);
		resultPath = getTempDirPath("result");
	}
	
	@Override
	protected Plan getTestJob() {
		KMeansBroadcast kmi = new KMeansBroadcast();
		return kmi.getPlan("4", dataPath, clusterPath, resultPath, "20");
	}


	@Override
	protected void postSubmit() throws Exception {
		List<String> resultLines = new ArrayList<String>();
		readAllResultLines(resultLines, resultPath);
		
		KMeansData.checkResultsWithDelta(KMeansData.CENTERS_AFTER_20_ITERATIONS_SINGLE_DIGIT, resultLines, 0.1);
	}
}