SetBtgId.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.btgs.functions;

import org.apache.flink.api.common.functions.JoinFunction;
import org.apache.flink.api.java.tuple.Tuple2;
import org.gradoop.common.model.api.entities.GraphElement;
import org.gradoop.common.model.impl.id.GradoopId;
import org.gradoop.common.model.impl.id.GradoopIdSet;

/**
 * Associates an edge with an business transaction graph.
 * @param <E> edge type
 */
public class SetBtgId<E extends GraphElement>
  implements JoinFunction<E, Tuple2<GradoopId, GradoopId>, E> {

  @Override
  public E join(E element, Tuple2<GradoopId, GradoopId> mapping) {
    element.setGraphIds(GradoopIdSet.fromExisting(mapping.f1));
    return element;
  }
}