| package org.apache.rya.indexing.pcj.fluo.app; |
| /* |
| * 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. |
| */ |
| import java.util.HashSet; |
| import java.util.Set; |
| |
| import com.google.common.base.Joiner; |
| |
| /** |
| * Converts {@link ConstructGraph}s to and from Strings for |
| * storage and retrieval from Fluo. |
| * |
| */ |
| public class ConstructGraphSerializer { |
| |
| public static final String SP_DELIM = "\u0002"; |
| |
| public static ConstructGraph toConstructGraph(String graphString) { |
| Set<ConstructProjection> projections = new HashSet<>(); |
| String[] spStrings = graphString.split(SP_DELIM); |
| for(String sp: spStrings) { |
| projections.add(new ConstructProjection(FluoStringConverter.toStatementPattern(sp))); |
| } |
| return new ConstructGraph(projections); |
| } |
| |
| public static String toConstructString(ConstructGraph graph) { |
| Set<ConstructProjection> projections = graph.getProjections(); |
| Set<String> spStrings = new HashSet<>(); |
| for(ConstructProjection projection: projections) { |
| spStrings.add(FluoStringConverter.toStatementPatternString(projection.getStatementPatternRepresentation())); |
| } |
| return Joiner.on(SP_DELIM).join(spStrings); |
| } |
| |
| } |