org.gradoop.flink.algorithms.fsm.transactional.tle.functions.ToCCSGraph.java Source code

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Here is the source code for org.gradoop.flink.algorithms.fsm.transactional.tle.functions.ToCCSGraph.java

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/**
 * Copyright  2014 - 2018 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;

/**
 * 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);
    }
}