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import javax.xml.parsers.DocumentBuilder;
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import javax.xml.parsers.DocumentBuilderFactory;
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import javax.xml.xpath.XPath;
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import javax.xml.xpath.XPathFactory;
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import javax.xml.xpath.XPathVariableResolver;
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import javax.xml.xpath.XPathFactoryConfigurationException;
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import org.w3c.dom.Node;
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public class StandaloneSaxonTest {
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/*
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How to run sample (unix based Machine) in the same directory as class:
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1. "mkdir ./build" - Create build directory where output compilation will go to
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2. "javac -cp <Path/to/Saxon-HE-11.4.jar> -d ./build *.java" - Compile sample to build directory with classpath pointing to SaxonHE 11.4 jar
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3. "cd ./build" - Move to build directory which should contain output compilation classes
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4. "jar cvf Test.jar *" - Jar up all classes to Test.jar
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5. "java -Dtest.property.useSaxonTransformer=[true|false] -cp "<Path/to/Saxon-HE-11.4.jar>:<Path/to/xmlresolver-4.4.3.jar>:./Test.jar" StandaloneSaxonTest" - Run sample in previously built jar with classpath pointing to Saxon and xmlresolver dependency
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*/
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public StandaloneSaxonTest() {
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}
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private static XPathFactory XPATH_FACTORY;
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// Decides whether to use Saxon XPathFactory or JDK XPathFactory
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private static final String USE_SAXON_PROPERTY = "test.property.useSaxonTransformer";
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private static final boolean USE_SAXON = Boolean.getBoolean(USE_SAXON_PROPERTY);
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private static class CustomVariableResolver implements javax.xml.xpath.XPathVariableResolver
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{
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public Object resolveVariable(javax.xml.namespace.QName qname) throws NullPointerException {
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return null;
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}
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}
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private static void initXPathFactory() {
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System.out.println("Using Saxon XPathFactory? " + USE_SAXON);
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if(!USE_SAXON){
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try {
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XPATH_FACTORY = XPathFactory.newInstance(XPathFactory.DEFAULT_OBJECT_MODEL_URI);
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} catch (XPathFactoryConfigurationException xpce) {
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xpce.printStackTrace();
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}
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}else{
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XPATH_FACTORY = new net.sf.saxon.xpath.XPathFactoryImpl();
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}
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}
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public static void main(String[] args) throws Exception{
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// Init which XPathFactory to use
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initXPathFactory();
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// Create fake document to run evaluate on
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DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
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factory.setNamespaceAware(true);
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factory.setValidating( false );
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DocumentBuilder builder = factory.newDocumentBuilder();
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Node doc = builder.newDocument();
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// Initialize an XPath from XPathFactory
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XPath xpath = XPATH_FACTORY.newXPath();
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// Add custom resolver returning null
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XPathVariableResolver vr = new CustomVariableResolver();
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xpath.setXPathVariableResolver(vr);
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// Evaluate the result. Should get an exception according to JAXP 1.3 Spec:
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//"... An javax.xml.xpath.XPathExpressionException is raised if the variable resolver is undefined or the resolver returns null for the variable."
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String res = xpath.evaluate("$doc//a", doc);
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System.out.println("Failed to see exception. Got result: "+res);
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}
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}
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