ToCCSGraph.java
/*
* Copyright © 2014 - 2021 Leipzig University (Database Research Group)
*
* 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 org.gradoop.flink.algorithms.fsm.transactional.tle.functions;
import com.google.common.collect.Maps;
import org.apache.flink.api.common.functions.MapFunction;
import org.gradoop.common.model.impl.id.GradoopId;
import org.gradoop.flink.model.impl.layouts.transactional.tuples.GraphTransaction;
import org.gradoop.flink.algorithms.fsm.transactional.CategoryCharacteristicSubgraphs;
import org.gradoop.flink.algorithms.fsm.transactional.tle.pojos.CCSGraph;
import org.gradoop.flink.algorithms.fsm.transactional.tle.pojos.FSMEdge;
import java.util.Map;
/**
* {@code graphTransaction => categorizedGraph}
*/
public class ToCCSGraph extends ToFSMGraph implements MapFunction<GraphTransaction, CCSGraph> {
@Override
public CCSGraph map(GraphTransaction graph) throws Exception {
String category = graph.getGraphHead().getPropertyValue(
CategoryCharacteristicSubgraphs.CATEGORY_KEY).toString();
Map<GradoopId, Integer> vertexIdMap =
Maps.newHashMapWithExpectedSize(graph.getVertices().size());
Map<Integer, String> fsmVertices = transformVertices(graph, vertexIdMap);
Map<Integer, FSMEdge> fsmEdges = transformEdges(graph, vertexIdMap);
return new CCSGraph(
category, graph.getGraphHead().getId(), fsmVertices, fsmEdges);
}
}