| /** |
| * 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.expr.nodevalue; |
| |
| import java.util.Objects ; |
| |
| import org.apache.jena.graph.Node ; |
| import org.apache.jena.graph.NodeFactory ; |
| import org.apache.jena.sparql.expr.NodeValue ; |
| import org.apache.jena.sparql.util.FmtUtils ; |
| |
| /** A NodeValue that is a lang tagged literal (rdf:langString). |
| * A string + language tag which is not "" |
| */ |
| public class NodeValueLang extends NodeValue { |
| // We could extends NodeValueString for the machinary |
| // but it get confusing as then it is a NodeValueString |
| // but isString is false. |
| |
| private final String string ; |
| private final String lang; |
| |
| public NodeValueLang(String lex, String lang) { |
| this.string = Objects.requireNonNull(lex) ; |
| this.lang = Objects.requireNonNull(lang) ; |
| if ( lang.isEmpty() ) |
| throw new IllegalArgumentException("lang is the empty string") ; |
| } |
| |
| public NodeValueLang(Node n) { |
| super(Objects.requireNonNull(n)) ; |
| this.string = n.getLiteralLexicalForm() ; |
| this.lang = n.getLiteralLanguage() ; |
| } |
| |
| @Override |
| public boolean isLangString() { |
| return true; |
| } |
| |
| @Override |
| public String getString() { return string ; } |
| |
| @Override |
| public String getLang() { return lang ; } |
| |
| @Override |
| public String asString() { return string ; } |
| |
| @Override |
| protected Node makeNode() |
| { return NodeFactory.createLiteral(string, lang) ; } |
| |
| @Override |
| public String toString() { |
| if ( getNode() != null ) |
| return FmtUtils.stringForNode(getNode()) ; |
| return "'"+getString()+"'@"+lang ; |
| } |
| |
| @Override |
| public void visit(NodeValueVisitor visitor) { visitor.visit(this) ; } |
| } |