Java XQueryCompiler类代码示例

import net.sf.saxon.s9api.XQueryCompiler; //导入依赖的package包/类
public XQueryExecutable tryQueryCache(String xqueryPath,  
    ErrorListener errorListener, boolean tracing) throws Exception {
  String key = FilenameUtils.normalize(xqueryPath);
  XQueryExecutable xquery = xqueryExecutableCache.get(key);    
  if (xquery == null) {
    logger.info("Compiling and caching xquery \"" + xqueryPath + "\" ...");                 
    try {
      XQueryCompiler comp = processor.newXQueryCompiler();
      comp.setErrorListener(errorListener);
      comp.setCompileWithTracing(tracing);
      xquery = comp.compile(new File(xqueryPath));     
    } catch (Exception e) {
      logger.error("Could not compile XQuery \"" + xqueryPath + "\"", e);
      throw e;
    }      
    if (!developmentMode) {
      xqueryExecutableCache.put(key, xquery);
    }      
  }
  return xquery;
}
 

import net.sf.saxon.s9api.XQueryCompiler; //导入依赖的package包/类
/**
 * Executes a given XQuery expression on the given XML.
 * @param xml is the XQuery data source
 * @param query is the query expression
 * @return with the query result as String
 * @throws SaxonApiException was thrown when the XQuery execution is failed
 */
public String evaluateXQuery(final String xml, final String query) throws SaxonApiException {
    Processor processor = processorFactory.createProcessor();
    XQueryCompiler xqueryCompiler = processor.newXQueryCompiler();
    xqueryCompiler.setErrorListener(errorListener);
    XQueryExecutable xqueryExec = xqueryCompiler.compile(query);
    XQueryEvaluator xqueryEval = xqueryExec.load();
    xqueryEval.setErrorListener(errorListener);
    SAXSource requestXml = saxSourceFactory.createSAXSource(inputSourceFactory.createInputSource(xml));
    xqueryEval.setSource(requestXml);
    ByteArrayOutputStream baos = byteArrayOutputStreamFactory.createByteArrayOutputStream();
    Serializer ser = serializerFactory.createSerializer(baos);
    xqueryEval.setDestination(ser);
    xqueryEval.run();
    return baos.toString();
}
 

import net.sf.saxon.s9api.XQueryCompiler; //导入依赖的package包/类
/**
 * Set the namespaces in the XQueryCompiler.
 * 
 * @param xqueryCompiler
 * @param namespaceMappings Namespace prefix to Namespace uri mappings
 */
private  void setPrefixNamespaceMappings(XQueryCompiler xqueryCompiler, HashMap<String,String> namespaceMappings) {

	if (namespaceMappings != null) {
		
		// Get the mappings
		Set<Entry<String, String>> mappings = namespaceMappings.entrySet();

		// If mappings exist, set the namespaces
		if (mappings != null) {
		
			Iterator<Entry<String, String>> it = mappings.iterator();
			while (it.hasNext()) {
				Entry<String, String> entry = it.next();
				xqueryCompiler.declareNamespace(entry.getKey(),entry.getValue());
			}
		
		}	
		
	}
	
	// Add in the defaults
	xqueryCompiler.declareNamespace("xml",NamespaceConstant.XML);
	xqueryCompiler.declareNamespace("xs",NamespaceConstant.SCHEMA);
	xqueryCompiler.declareNamespace("fn",NamespaceConstant.FN);
	
}
 

import net.sf.saxon.s9api.XQueryCompiler; //导入依赖的package包/类
/**
 * Executes an XQuery file (on the classpath) under a given version of
 * XQuery
 * @param filename
 *            Filename as it appears on the classpath
 * @param xqueryVersion
 *            Must be "1.0" or "3.0"
 * @return Returns result of execution
 * @throws XQueryException
 */
public final XdmValue evaluateXQueryFile (String filename, String xqueryVersion) throws XQueryException {
    try {
        XQueryCompiler comp = this.processor.newXQueryCompiler();
        comp.setLanguageVersion(xqueryVersion);
        String query = fromResource(filename);
        XQueryExecutable exp = comp.compile(query);
        XQueryEvaluator ev = exp.load();
        return ev.evaluate();
    }
    catch (SaxonApiException | IOException e) {
        throw new XQueryException("An error occurred during execution of the document " + filename, e);
    }
}
 

import net.sf.saxon.s9api.XQueryCompiler; //导入依赖的package包/类
@Override
public void runApp() throws Exception {
    doAdditionalConfiguration(processor);
    Serializer out = prepareSerializer();
    XQueryCompiler compiler = processor.newXQueryCompiler();
    XQueryExecutable executable = compiler.compile(new File(config.getMainFile()));
    setMainModule(executable.getUnderlyingCompiledQuery().getMainModule());
    XQueryEvaluator evaluator = executable.load();
    bindContextItem(evaluator);
    bindVariables(evaluator);
    evaluator.run(out);
}
 

import net.sf.saxon.s9api.XQueryCompiler; //导入依赖的package包/类
/**
 * @return The global XQuery compiler for this FOX engine. This object is thread-safe.
 */
public static XQueryCompiler getXQueryCompiler() {
  return gXQueryCompiler;
}
 

import net.sf.saxon.s9api.XQueryCompiler; //导入依赖的package包/类
public XSPARQLQueryHandler(ContentHandler handler, Metadata metadata,
			/*ParseContext context,*/ Reader xquery, Map<String, StreamSource> includes)
			throws ParserException {
//		this.matcher = new XPathParser("rdf", RDF.NAMESPACE).parse("/rdf:RDF/descendant::node()");
		this.handler = handler;
		super.setContentHandler(this.handler);
//		this.context = context;
		this.metadata = metadata; 
//		this.turtleParser = new TurtleParser();
		this.stack = new Stack<String>();
		
		try {
			XSPARQLProcessor xp = new XSPARQLProcessor();			
			String q = xp.process(xquery);
//			logger.info(q);
			
			// TODO: This is nasty, but we need the namespaces from our XSPARQL query.
//			Matcher matcher = Pattern.compile(".*PREFIX ([a-zA-Z]+): <(.*)>").matcher(q);
//			while (matcher.find()) {
//				super.startPrefixMapping(matcher.group(1), matcher.group(2));
//			}
//			super.startElement("http://www.w3.org/1999/02/22-rdf-syntax-ns#", "RDF", "rdf:RDF", new AttributesImpl());

			Configuration config = new Configuration();
			
			// XSPARQL specific functions (see: https://sourceforge.net/mailarchive/message.php?msg_id=29435521).
		    config.registerExtensionFunction(new sparqlQueryExtFunction());
		    config.registerExtensionFunction(new turtleGraphToURIExtFunction());
		    config.registerExtensionFunction(new createScopedDatasetExtFunction());
		    config.registerExtensionFunction(new sparqlScopedDatasetExtFunction());
		    config.registerExtensionFunction(new deleteScopedDatasetExtFunction());
		    config.registerExtensionFunction(new scopedDatasetPopResultsExtFunction());
		    config.registerExtensionFunction(new jsonDocExtFunction());
		    
			// Custom XSPARQL functions.
			config.registerExtensionFunction(new ParseDateTimeFunction());
			config.registerExtensionFunction(new ParseDateFunction());
			config.registerExtensionFunction(new ObjectUriFunction());
			config.registerExtensionFunction(new ClassUriFunction());
			config.registerExtensionFunction(new AddressUriFunction());
			
			config.registerExtensionFunction(new ParseDecimalFunction());
			config.registerExtensionFunction(new ParseLocaleFunction());
			config.registerExtensionFunction(new ParseStringFunction());			
			config.registerExtensionFunction(new ParseBooleanFunction());
			config.registerExtensionFunction(new ParseHttpUrlFunction());
			config.registerExtensionFunction(new ParseNonZeroNumber());
			config.registerExtensionFunction(new UpperCaseFirstFunction());
			
			config.registerExtensionFunction(new PostalCodeFunction());
			config.registerExtensionFunction(new LocalityFunction());
			config.registerExtensionFunction(new StreetAddressFunction());
			config.registerExtensionFunction(new StreetNumberFunction());
			config.registerExtensionFunction(new StreetNameFunction());
			config.registerExtensionFunction(new ExtractStreetNumberFunction());
			config.registerExtensionFunction(new ExtractStreetNameFunction());
			
			config.registerExtensionFunction(new WKTGeometryFunction());
			config.registerExtensionFunction(new WebContentTypeFunction());
			config.registerExtensionFunction(new ParseCidnFunction());
			config.registerExtensionFunction(new UrlConcatFunction());
			
			Processor processor = new Processor(config);
			XQueryCompiler compiler = processor.newXQueryCompiler();	
			XQueryExecutable compiled = compiler.compile(q);
			evaluator = compiled.load();
			
			if (includes != null) {
				DocumentBuilder docBuilder = processor.newDocumentBuilder();
				for (Entry<String, StreamSource> item : includes.entrySet()) {
					evaluator.setExternalVariable(
						new QName(item.getKey()), 
						docBuilder.build(item.getValue()));				
				}
			}
		} catch (Exception e) {
			e.printStackTrace();
			throw new ParserException(e);
		}		
	}
 

import net.sf.saxon.s9api.XQueryCompiler; //导入依赖的package包/类
/**
 * Initialization to improve performance for repetitive invocations of evaluate expressions
 * 
 * @throws XQueryException
 */
private void init() throws XQueryException {
	
	try {
		
		// Get the processor
		proc = new Processor(false);

		// Set any specified configuration properties for the processor
		if (featureMappings != null) {
			for (Entry<String, Object> entry : featureMappings.entrySet()) {
				proc.setConfigurationProperty(entry.getKey(), entry.getValue());
			}
		}
		
		// Get the XQuery compiler
		XQueryCompiler xqueryCompiler = proc.newXQueryCompiler();
		xqueryCompiler.setEncoding(CharEncoding.UTF_8);

		// Set the namespace to prefix mappings
		this.setPrefixNamespaceMappings(xqueryCompiler, namespaceMappings);

		// Compile the XQuery expression and get an XQuery evaluator
		exp = xqueryCompiler.compile(xQueryExpression);
		eval = exp.load();
		
		// Create and initialize the serializer 
		baos = new ByteArrayOutputStream();
		serializer = proc.newSerializer(baos);
		// Appears ok to always set output property to xml (even if we are just returning a text string)
		serializer.setOutputProperty(Serializer.Property.METHOD, "xml");
		serializer.setOutputProperty(Serializer.Property.OMIT_XML_DECLARATION,"yes");
		serializer.setProcessor(proc);
		
	} catch (SaxonApiException e) {
		
		log.error("Problems creating an XQueryProcessor.  " + e.getMessage(),e);
		throw new XQueryException(e.getMessage());

	}
	
}