ReportSupportedPatterns.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.dimspan.functions.mining;

import org.apache.flink.api.common.functions.FlatMapFunction;
import org.apache.flink.util.Collector;

import org.gradoop.flink.algorithms.fsm.dimspan.tuples.GraphWithPatternEmbeddingsMap;
import org.gradoop.flink.model.impl.tuples.WithCount;

/**
 * {@code (graph, pattern->embeddings) => (pattern, 1),..}
 */
public class ReportSupportedPatterns
  implements FlatMapFunction<GraphWithPatternEmbeddingsMap, WithCount<int[]>> {

  @Override
  public void flatMap(GraphWithPatternEmbeddingsMap graphEmbeddings,
    Collector<WithCount<int[]>> collector) throws Exception {

    if (! graphEmbeddings.isFrequentPatternCollector()) {
      for (int i = 0; i < graphEmbeddings.getMap().getPatternCount(); i++) {
        int[] pattern = graphEmbeddings.getMap().getKeys()[i];
        collector.collect(new WithCount<>(pattern));
      }
    }
  }
}