eu.stratosphere.example.java.graph.util.PageRankData Maven / Gradle / Ivy

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/***********************************************************************************************************************
 *
 * 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.example.java.graph.util;

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

import eu.stratosphere.api.java.DataSet;
import eu.stratosphere.api.java.ExecutionEnvironment;
import eu.stratosphere.api.java.tuple.Tuple2;

public class PageRankData {

	private static int numPages = 15;
	
	public static DataSet> getDefaultPageWithRankDataSet(ExecutionEnvironment env) {
		
		double initRank = 1.0 / numPages;
		
		List> data = new ArrayList>();
		
		for(int i=0; i(i+1L, initRank));
		}
		return env.fromCollection(data);
	}
	
	public static DataSet> getDefaultEdgeDataSet(ExecutionEnvironment env) {
		
		List> data = new ArrayList>();
		data.add(new Tuple2(1L, 2L));
		data.add(new Tuple2(1L, 15L));
		data.add(new Tuple2(2L, 3L));
		data.add(new Tuple2(2L, 4L));
		data.add(new Tuple2(2L, 5L));
		data.add(new Tuple2(2L, 6L));
		data.add(new Tuple2(2L, 7L));
		data.add(new Tuple2(3L, 13L));
		data.add(new Tuple2(4L, 2L));
		data.add(new Tuple2(5L, 11L));
		data.add(new Tuple2(5L, 12L));
		data.add(new Tuple2(6L, 1L));
		data.add(new Tuple2(6L, 7L));
		data.add(new Tuple2(6L, 8L));
		data.add(new Tuple2(7L, 1L));
		data.add(new Tuple2(7L, 8L));
		data.add(new Tuple2(8L, 1L));
		data.add(new Tuple2(8L, 9L));
		data.add(new Tuple2(8L, 10L));
		data.add(new Tuple2(9L, 14L));
		data.add(new Tuple2(9L, 1L));
		data.add(new Tuple2(10L, 1L));
		data.add(new Tuple2(10L, 13L));
		data.add(new Tuple2(11L, 12L));
		data.add(new Tuple2(11L, 1L));
		data.add(new Tuple2(12L, 1L));
		data.add(new Tuple2(13L, 14L));
		data.add(new Tuple2(14L, 12L));
		data.add(new Tuple2(15L, 1L));
		
		return env.fromCollection(data);
	}
	
	public static int getNumberOfPages() {
		return numPages;
	}
	
}