MinEdgeCount.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 org.apache.flink.api.common.functions.FilterFunction;
import org.gradoop.flink.algorithms.fsm.transactional.common.FSMConfig;
import org.gradoop.flink.algorithms.fsm.transactional.tle.tuples.Subgraph;

/**
 * Filters a subgraph by minimum edge count.
 *
 * @param <S> subgraph type
 */
public class MinEdgeCount<S extends Subgraph> implements FilterFunction<S> {

  /**
   * Minimum number of edges
   */
  private final int minEdgeCount;

  /**
   * Constructor.
   *
   * @param fsmConfig FSM configuration
   */
  public MinEdgeCount(FSMConfig fsmConfig) {
    this.minEdgeCount = fsmConfig.getMinEdgeCount();
  }

  @Override
  public boolean filter(S subgraph) throws Exception {
    return subgraph.getEmbedding().getEdges().size() >= minEdgeCount;
  }
}