/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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
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package org.apache.tinkerpop.gremlin.spark.process.computer.traversal.strategy.optimization.interceptor;

import org.apache.spark.api.java.JavaPairRDD;
import org.apache.tinkerpop.gremlin.hadoop.structure.io.VertexWritable;
import org.apache.tinkerpop.gremlin.process.computer.VertexProgram;
import org.apache.tinkerpop.gremlin.spark.process.computer.SparkMemory;
import org.apache.tinkerpop.gremlin.spark.process.computer.traversal.strategy.SparkVertexProgramInterceptor;

public class SparkCloneVertexProgramInterceptor implements SparkVertexProgramInterceptor<VertexProgram> {
    @Override
    public JavaPairRDD<Object, VertexWritable> apply(VertexProgram vertexProgram, JavaPairRDD<Object, VertexWritable> graph, SparkMemory memory) {
        // bypass the VertexProgram since CloneVertexProgram does nothing in its execute method
        return graph;
    }
}
