Java tutorial
/** * 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.jena.commonsrdf; import org.apache.commons.rdf.api.*; import org.apache.jena.commonsrdf.impl.JCR_Factory; /** RDFTermFactory with Jena-backed objects. * See {@link JenaCommonsRDF} for other conversions of existing objects. * * @see RDFTermFactory */ public class RDFTermFactoryJena implements RDFTermFactory { @Override public BlankNode createBlankNode() { return JCR_Factory.createBlankNode(); } @Override public BlankNode createBlankNode(String name) { return JCR_Factory.createBlankNode(name); } @Override public Graph createGraph() { return JCR_Factory.createGraph(); } @Override public IRI createIRI(String iri) { validateIRI(iri); return JCR_Factory.createIRI(iri); } // Some simple validations - full IRI parsing is not cheap. private static void validateIRI(String iri) { if (iri.contains(" ")) throw new IllegalArgumentException(); if (iri.contains("<")) throw new IllegalArgumentException(); if (iri.contains(">")) throw new IllegalArgumentException(); } @Override public Literal createLiteral(String lexicalForm) { return JCR_Factory.createLiteral(lexicalForm); } @Override public Literal createLiteral(String lexicalForm, IRI dataType) { return JCR_Factory.createLiteralDT(lexicalForm, dataType.getIRIString()); } @Override public Literal createLiteral(String lexicalForm, String languageTag) { validateLang(languageTag); return JCR_Factory.createLiteralLang(lexicalForm, languageTag); } private static void validateLang(String languageTag) { if (languageTag.contains(" ")) throw new IllegalArgumentException(); } @Override public Triple createTriple(BlankNodeOrIRI subject, IRI predicate, RDFTerm object) { return JCR_Factory.createTriple(subject, predicate, object); } }