| /* |
| * 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.clerezza.commons.rdf.event; |
| |
| import org.apache.clerezza.commons.rdf.BlankNodeOrIri; |
| import org.apache.clerezza.commons.rdf.RdfTerm; |
| import org.apache.clerezza.commons.rdf.Triple; |
| import org.apache.clerezza.commons.rdf.Iri; |
| |
| /** |
| * The <code>FilterTriple</code> class provides a match()-method that tests |
| * if a <code>Triple</code> match a certain triple pattern. |
| * |
| * @author mir |
| */ |
| public class FilterTriple { |
| |
| private BlankNodeOrIri subject; |
| private Iri predicate; |
| private RdfTerm object; |
| |
| /** |
| * Creates a new <code>FilterTriple</code>. The specified subject, |
| * predicate and object are used to test a given <code>Triple</code>. Any |
| * of these values can be null, which acts as wildcard in the test. |
| * |
| * @param subject the subject. |
| * @param predicate the predicate. |
| * @param object the object. |
| */ |
| public FilterTriple (BlankNodeOrIri subject, Iri predicate, RdfTerm object) { |
| this.subject = subject; |
| this.predicate = predicate; |
| this.object = object; |
| } |
| |
| /** |
| * Returns true if the subject, predicate and object of the specified |
| * <code>Triple</code> match the subject, predicate and object of this |
| * <code>FilterTriple</code>. Null values in the <code>FilterTriple</code> |
| * act as wildcards. |
| * @param triple |
| * @return |
| */ |
| public boolean match(Triple triple) { |
| boolean subjectMatch, predicateMatch, objectMatch; |
| if (this.subject == null) { |
| subjectMatch = true; |
| } else { |
| subjectMatch = this.subject.equals(triple.getSubject()); |
| } |
| if (this.predicate == null) { |
| predicateMatch = true; |
| } else { |
| predicateMatch = this.predicate.equals(triple.getPredicate()); |
| } |
| if (this.object == null) { |
| objectMatch = true; |
| } else { |
| objectMatch = this.object.equals(triple.getObject()); |
| } |
| return subjectMatch && predicateMatch && objectMatch; |
| } |
| |
| @Override |
| public String toString() { |
| return "FilterTriples: "+subject+" "+predicate+" "+object; |
| } |
| |
| } |