LongIdTupleToGellyEdgeWithLongValueJoin.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.gelly.randomjump.functions;
- import org.apache.flink.api.common.functions.JoinFunction;
- import org.apache.flink.api.java.functions.FunctionAnnotation;
- import org.apache.flink.api.java.tuple.Tuple2;
- import org.apache.flink.api.java.tuple.Tuple3;
- import org.apache.flink.graph.Edge;
- import org.gradoop.common.model.impl.id.GradoopId;
- /**
- * Creates a Gelly edge with its long index as its value.
- */
- @FunctionAnnotation.ForwardedFieldsFirst("f0;f1")
- @FunctionAnnotation.ForwardedFieldsSecond("f0->f2")
- public class LongIdTupleToGellyEdgeWithLongValueJoin implements
- JoinFunction<Tuple3<Long, Long, GradoopId>, Tuple2<Long, GradoopId>, Edge<Long, Long>> {
- /**
- * Reduce object instantiation.
- */
- private final Edge<Long, Long> reuseEdge;
- /**
- * Creates an instance of LongIdTupleToGellyEdgeWithLongValueJoin.
- */
- public LongIdTupleToGellyEdgeWithLongValueJoin() {
- this.reuseEdge = new Edge<>();
- }
- @Override
- public Edge<Long, Long> join(Tuple3<Long, Long, GradoopId> edgeTuple,
- Tuple2<Long, GradoopId> indexToEdgeId) throws Exception {
- reuseEdge.setSource(edgeTuple.f0);
- reuseEdge.setTarget(edgeTuple.f1);
- reuseEdge.setValue(indexToEdgeId.f0);
- return reuseEdge;
- }
- }