/* * 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 KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ package org.apache.flink.graph.asm.translate; import org.apache.flink.api.java.DataSet; import org.apache.flink.graph.Graph; import org.apache.flink.graph.Vertex; import org.apache.flink.graph.utils.proxy.GraphAlgorithmWrappingBase; import org.apache.flink.graph.utils.proxy.GraphAlgorithmWrappingGraph; import org.apache.flink.util.Preconditions; import static org.apache.flink.graph.asm.translate.Translate.translateVertexValues; /** * Translate {@link Vertex} values using the given {@link TranslateFunction}. * * @param <K> vertex ID type * @param <OLD> old vertex value type * @param <NEW> new vertex value type * @param <EV> edge value type */ public class TranslateVertexValues<K, OLD, NEW, EV> extends GraphAlgorithmWrappingGraph<K, OLD, EV, K, NEW, EV> { // Required configuration private TranslateFunction<OLD, NEW> translator; /** * Translate {@link Vertex} values using the given {@link TranslateFunction}. * * @param translator implements conversion from {@code OLD} to {@code NEW} */ public TranslateVertexValues(TranslateFunction<OLD, NEW> translator) { Preconditions.checkNotNull(translator); this.translator = translator; } @Override protected boolean canMergeConfigurationWith(GraphAlgorithmWrappingBase other) { if (!super.canMergeConfigurationWith(other)) { return false; } TranslateVertexValues rhs = (TranslateVertexValues) other; return translator == rhs.translator; } @Override public Graph<K, NEW, EV> runInternal(Graph<K, OLD, EV> input) throws Exception { DataSet<Vertex<K, NEW>> translatedVertices = translateVertexValues(input.getVertices(), translator, parallelism); return Graph.fromDataSet(translatedVertices, input.getEdges(), input.getContext()); } }