/*
 * 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.flink.graph.example.utils;

import org.apache.flink.api.java.DataSet;
import org.apache.flink.api.java.ExecutionEnvironment;
import org.apache.flink.api.java.operators.DataSource;
import org.apache.flink.graph.Edge;
import org.apache.flink.graph.Vertex;
import org.apache.flink.types.NullValue;

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

public class SingleSourceShortestPathsDataUnweighted {

	public static final int NUM_VERTICES = 5;

	public static final Long SRC_VERTEX_ID = 1L;

	public static final String VERTICES = "1,1\n" + "2,2\n" + "3,3\n" + "4,4\n" + "5,5";

	public static DataSet<Vertex<Long, Long>> getDefaultVertexDataSet(ExecutionEnvironment env) {

		List<Vertex<Long, Long>> vertices = new ArrayList<Vertex<Long, Long>>();
		vertices.add(new Vertex<Long, Long>(1L, 1L));
		vertices.add(new Vertex<Long, Long>(2L, 2L));
		vertices.add(new Vertex<Long, Long>(3L, 3L));
		vertices.add(new Vertex<Long, Long>(4L, 4L));
		vertices.add(new Vertex<Long, Long>(5L, 5L));

		return env.fromCollection(vertices);
	}

	public static final String EDGES = "1,2\n" + "1,3\n" + "2,3\n" + "3,4\n" + "3,5\n" + 
					"4,5\n" + "5,1";

	public static final DataSource<Edge<Long, NullValue>> getDefaultEdgeDataSet(ExecutionEnvironment env) {

		List<Edge<Long, NullValue>> edges = new ArrayList<Edge<Long, NullValue>>();
		edges.add(new Edge<Long, NullValue>(1L, 2L, NullValue.getInstance()));
		edges.add(new Edge<Long, NullValue>(1L, 3L, NullValue.getInstance()));
		edges.add(new Edge<Long, NullValue>(2L, 3L, NullValue.getInstance()));
		edges.add(new Edge<Long, NullValue>(3L, 4L, NullValue.getInstance()));
		edges.add(new Edge<Long, NullValue>(3L, 5L, NullValue.getInstance()));
		edges.add(new Edge<Long, NullValue>(4L, 5L, NullValue.getInstance()));
		edges.add(new Edge<Long, NullValue>(5L, 1L, NullValue.getInstance()));

		return env.fromCollection(edges);
	}

	public static final String RESULTED_SINGLE_SOURCE_SHORTEST_PATHS =  "1,0\n" + "2,1\n" + "3,1\n" + 
								"4,2\n" + "5,2";

	private SingleSourceShortestPathsDataUnweighted() {}
}