| /* |
| * 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.rdfxml.xmlinput0; |
| |
| import java.io.IOException ; |
| import java.io.StringReader ; |
| |
| import org.apache.jena.datatypes.BaseDatatype; |
| import org.apache.jena.datatypes.DatatypeFormatException ; |
| import org.apache.jena.datatypes.RDFDatatype; |
| import org.apache.jena.datatypes.xsd.impl.XMLLiteralType; |
| import org.apache.jena.shared.BrokenException ; |
| import org.xml.sax.ErrorHandler ; |
| import org.xml.sax.SAXException ; |
| import org.xml.sax.SAXParseException ; |
| |
| /** |
| * Builtin data type to represent XMLLiteral (i.e. items created |
| * by use of <code>rdf:parsetype='literal'</code>. |
| * Version of rdf:XMLLiteral using ARP1 and hence has RDF1.0 semantics for the value space |
| */ |
| @Deprecated(forRemoval=true, since="5.0.0") |
| public class XMLLiteralTypeARP0 extends BaseDatatype implements RDFDatatype { |
| |
| public static final RDFDatatype dtRDF10 = new XMLLiteralTypeARP0(XMLLiteralType.XMLLiteralTypeURI); |
| |
| private XMLLiteralTypeARP0(String uri) { |
| super(uri); |
| } |
| |
| /** |
| * Convert a serialize a value of this datatype out |
| * to lexical form. |
| */ |
| @Override |
| public String unparse(Object value) { |
| return value.toString(); |
| } |
| |
| /** |
| * Parse a lexical form of this datatype to a value |
| * @throws DatatypeFormatException if the lexical form is not legal |
| */ |
| @Override |
| public Object parse(String lexicalForm) throws DatatypeFormatException { |
| if ( !isValid(lexicalForm)) |
| throw new DatatypeFormatException("Bad rdf:XMLLiteral"); |
| return lexicalForm; |
| } |
| |
| /** |
| * Test whether the given string is a legal lexical form |
| * of this datatype. |
| */ |
| @Override |
| public boolean isValid(final String lexicalForm) { |
| /* |
| * To check the lexical form we construct |
| * a dummy RDF/XML document and parse it with |
| * ARP. ARP performs an exclusive canonicalization, |
| * the dummy document has exactly one triple. |
| * If the lexicalForm is valid then the resulting |
| * literal found by ARP is unchanged. |
| * All other scenarios are either impossible |
| * or occur because the lexical form is invalid. |
| */ |
| final boolean status[] = new boolean[]{false,false,false}; |
| // status[0] true on error or other reason to know that this is not well-formed |
| // status[1] true once first triple found |
| // status[2] the result (good if status[1] and not status[0]). |
| |
| ARP0 arp = new ARP0(); |
| |
| arp.getHandlers().setErrorHandler(new ErrorHandler(){ |
| @Override |
| public void fatalError(SAXParseException e){ |
| status[0] = true; |
| } |
| @Override |
| public void error(SAXParseException e){ |
| status[0] = true; |
| } |
| @Override |
| public void warning(SAXParseException e){ |
| status[0] = true; |
| } |
| }); |
| arp.getHandlers().setStatementHandler(new StatementHandler(){ |
| @Override |
| public void statement(AResource a, AResource b, ALiteral l){ |
| /* this method is invoked exactly once |
| * while parsing the dummy document. |
| * The l argument is in exclusive canonical XML and |
| * corresponds to where the lexical form has been |
| * in the dummy document. The lexical form is valid |
| * iff it is unchanged. |
| */ |
| if (status[1] || !l.isWellFormedXML()) { |
| status[0] = true; |
| } |
| //throw new BrokenException("plain literal in XMLLiteral code."); |
| status[1] = true; |
| status[2] = l.toString().equals(lexicalForm); |
| } |
| @Override |
| public void statement(AResource a, AResource b, AResource l){ |
| status[0] = true; |
| //throw new BrokenException("resource valued RDF/XML in XMLLiteral code."); |
| } |
| }); |
| try { |
| |
| arp.load(new StringReader( |
| "<rdf:RDF xmlns:rdf='http://www.w3.org/1999/02/22-rdf-syntax-ns#'>\n" |
| +"<rdf:Description><rdf:value rdf:parseType='Literal'>" |
| +lexicalForm+"</rdf:value>\n" |
| +"</rdf:Description></rdf:RDF>" |
| )); |
| |
| } |
| catch (IOException ioe){ |
| throw new BrokenException(ioe); |
| } |
| catch (SAXException s){ |
| return false; |
| } |
| |
| |
| return (!status[0])&&status[1]&&status[2]; |
| } |
| |
| } |