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ARQ is a SPARQL 1.1 query engine for Apache Jena
/*
* 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.sparql.graph;
import org.apache.jena.datatypes.RDFDatatype;
import org.apache.jena.datatypes.xsd.XSDDatatype;
import org.apache.jena.graph.Node;
import org.apache.jena.graph.NodeFactory;
import org.apache.jena.vocabulary.OWL;
import org.apache.jena.vocabulary.RDF;
/** Some node constants */
public class NodeConst {
private static Node literal(String lex, RDFDatatype dt) {
return NodeFactory.createLiteral(lex, dt);
}
private static Node uri(String uriStr) {
return NodeFactory.createURI(uriStr);
}
public static final Node nodeTrue = literal("true", XSDDatatype.XSDboolean);
public static final Node nodeFalse = literal("false", XSDDatatype.XSDboolean);
public static final Node nodeZero = literal("0", XSDDatatype.XSDinteger);
public static final Node nodeOne = literal("1", XSDDatatype.XSDinteger);
public static final Node nodeTwo = literal("2", XSDDatatype.XSDinteger);
public static final Node nodeTen = literal("10", XSDDatatype.XSDinteger);
public static final Node nodeMinusOne = literal("-1", XSDDatatype.XSDinteger);
public static final Node emptyString = NodeFactory.createLiteral("");
// It should be safe to use RDF.Nodes.
// Fallback code "just in case"
public static final Node nodeRDFType = RDF.Nodes.type; // uri(RDF.uri+"type")
public static final Node nodeFirst = RDF.Nodes.first; // uri(RDF.uri+"first")
public static final Node nodeRest = RDF.Nodes.rest; // uri(RDF.uri+"rest")
public static final Node nodeNil = RDF.Nodes.nil; // uri(RDF.uri+"nil")
public static final Node nodeANY = Node.ANY;
public static final Node nodeOwlSameAs = OWL.sameAs.asNode(); // uri("http://www.w3.org/2002/07/owl#sameAs")
public static final Node rdfLangString = RDF.Nodes.langString;
public static final RDFDatatype dtLangString = RDF.dtLangString;
}