| package org.apache.rya.rdftriplestore.inference; |
| |
| /* |
| * 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 org.apache.rya.api.RdfCloudTripleStoreConfiguration; |
| import org.apache.rya.rdftriplestore.utils.FixedStatementPattern; |
| import org.apache.rya.rdftriplestore.utils.TransitivePropertySP; |
| import org.eclipse.rdf4j.query.algebra.Join; |
| import org.eclipse.rdf4j.query.algebra.StatementPattern; |
| import org.eclipse.rdf4j.query.algebra.Union; |
| import org.eclipse.rdf4j.query.algebra.Var; |
| import org.eclipse.rdf4j.query.algebra.helpers.AbstractQueryModelVisitor; |
| |
| import static com.google.common.base.Preconditions.checkNotNull; |
| |
| /** |
| * Class AbstractInferVisitor |
| * Date: Mar 14, 2012 |
| * Time: 5:33:01 PM |
| */ |
| public class AbstractInferVisitor extends AbstractQueryModelVisitor<Exception> { |
| |
| static Var EXPANDED = new Var("infer-expanded"); |
| |
| boolean include = true; |
| |
| RdfCloudTripleStoreConfiguration conf; |
| InferenceEngine inferenceEngine; |
| |
| public AbstractInferVisitor(RdfCloudTripleStoreConfiguration conf, InferenceEngine inferenceEngine) { |
| checkNotNull(conf, "Configuration cannot be null"); |
| checkNotNull(inferenceEngine, "Inference Engine cannot be null"); |
| this.conf = conf; |
| this.inferenceEngine = inferenceEngine; |
| } |
| |
| @Override |
| public void meet(StatementPattern sp) throws Exception { |
| if (!include) { |
| return; |
| } |
| if (sp instanceof FixedStatementPattern || sp instanceof TransitivePropertySP || sp instanceof DoNotExpandSP) { |
| return; //already inferred somewhere else |
| } |
| final Var predVar = sp.getPredicateVar(); |
| //we do not let timeRange preds be inferred, not good |
| if (predVar == null || predVar.getValue() == null |
| // || RdfCloudTripleStoreUtils.getTtlValueConverter(conf, (URI) predVar.getValue()) != null |
| ) { |
| return; |
| } |
| meetSP(sp); |
| } |
| |
| protected void meetSP(StatementPattern sp) throws Exception { |
| |
| } |
| |
| @Override |
| public void meet(Union node) throws Exception { |
| // if (!(node instanceof InferUnion)) |
| super.meet(node); |
| } |
| |
| @Override |
| public void meet(Join node) throws Exception { |
| if (!(node instanceof InferJoin)) { |
| super.meet(node); |
| } |
| } |
| |
| public RdfCloudTripleStoreConfiguration getConf() { |
| return conf; |
| } |
| |
| public void setConf(RdfCloudTripleStoreConfiguration conf) { |
| this.conf = conf; |
| } |
| |
| public InferenceEngine getInferenceEngine() { |
| return inferenceEngine; |
| } |
| |
| public void setInferenceEngine(InferenceEngine inferenceEngine) { |
| this.inferenceEngine = inferenceEngine; |
| } |
| } |