| package org.apache.rya.indexing.statement.metadata.matching; |
| /* |
| * 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 static com.google.common.base.Preconditions.checkNotNull; |
| |
| import org.apache.hadoop.conf.Configurable; |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.rya.api.RdfCloudTripleStoreConfiguration; |
| import org.apache.rya.indexing.external.matching.AbstractExternalSetOptimizer; |
| import org.apache.rya.indexing.external.matching.BasicRater; |
| import org.apache.rya.indexing.external.matching.ExternalSetMatcher; |
| import org.apache.rya.indexing.external.matching.ExternalSetProvider; |
| import org.apache.rya.indexing.external.matching.QueryNodeListRater; |
| import org.apache.rya.indexing.external.matching.QuerySegment; |
| import org.eclipse.rdf4j.query.BindingSet; |
| import org.eclipse.rdf4j.query.Dataset; |
| import org.eclipse.rdf4j.query.algebra.TupleExpr; |
| |
| import com.google.common.base.Optional; |
| |
| public class StatementMetadataOptimizer extends AbstractExternalSetOptimizer<StatementMetadataNode<?>>implements Configurable { |
| |
| private StatementMetadataExternalSetMatcherFactory factory = new StatementMetadataExternalSetMatcherFactory(); |
| private RdfCloudTripleStoreConfiguration conf; |
| public boolean init = false; |
| public StatementMetadataExternalSetProvider provider; |
| |
| public StatementMetadataOptimizer() {} |
| |
| public StatementMetadataOptimizer(RdfCloudTripleStoreConfiguration conf) { |
| setConf(conf); |
| } |
| |
| @Override |
| public final void setConf(Configuration conf) { |
| checkNotNull(conf); |
| if (!init) { |
| try { |
| this.conf = (RdfCloudTripleStoreConfiguration) conf; |
| provider = new StatementMetadataExternalSetProvider(this.conf); |
| } catch (Exception e) { |
| throw new RuntimeException(e); |
| } |
| init = true; |
| } |
| } |
| |
| @Override |
| public Configuration getConf() { |
| return conf; |
| } |
| |
| @Override |
| public void optimize(TupleExpr tupleExpr, Dataset dataset, BindingSet bindings) { |
| if(!init) { |
| throw new IllegalStateException("Optimizer has not been properly initialized. Configuration must be set to initialize this class."); |
| } |
| super.optimize(tupleExpr, dataset, bindings); |
| } |
| |
| @Override |
| protected ExternalSetMatcher<StatementMetadataNode<?>> getMatcher(QuerySegment<StatementMetadataNode<?>> segment) { |
| return factory.getMatcher(segment); |
| } |
| |
| @Override |
| protected ExternalSetProvider<StatementMetadataNode<?>> getProvider() { |
| return provider; |
| } |
| |
| @Override |
| protected Optional<QueryNodeListRater> getNodeListRater(QuerySegment<StatementMetadataNode<?>> segment) { |
| return Optional.of(new BasicRater(segment.getOrderedNodes())); |
| } |
| |
| } |