是dyn：评估已知在Xalan-J 2.7.1中存在问题的扩展函数吗？

我很难过为什么以下示例程序拒绝正确应用我的样式表。看来dyn:evaluate在Xalan 2.7.1中的dyn:evaluate是拒绝处理某些XPath变量。
在类路径中使用xalan-j运行以下程序会产生以下结果：
 package com.testing2.xslt; import java.io.*; import java.util.logging.*; import javax.xml.transform.*; import javax.xml.transform.stream.*; public class DynEvaluateTransform { private static final String XSLT = "" + "\n" + "\n" + " \n" + " \n" + " \n" + " \n" + " \n" + " \n" + " \n" + " dyn:evaluate available\n" + " \n" + " \n" + " dyn:evaluate not available\n" + " \n" + " \n" + " input.xml content:\n" + " \n" + " {}\n" + "  \n" + " \n" + " \n" + " \n" + " \n" + " \n" + " \n" + ""; private static final String EXAMPLE = "" + "\n" + " \n" + "  \n" + "  \n" + " \n" + " \n" + " \n" + " \n" + " \n" + " \n" + " \n" + " \n" + " \n" + " \n" + ""; private static final String INPUT = "" + "\n" + "\n" + " \n" + " \n" + " \n" + ""; private TransformerFactory xalanTransFact; public DynEvaluateTransform() { xalanTransFact = new org.apache.xalan.processor.TransformerFactoryImpl(); xalanTransFact.setURIResolver(new Resolver()); } private void applyTransform() { // XSLT(EXAMPLE) --> output.xml // ^ // | // INPUT OutputStreamWriter writer = null; try { String outputFileName = DynEvaluateTransform.getLocalFileName("output.xml"); File file = new File(outputFileName); writer = new OutputStreamWriter(new FileOutputStream(file), "UTF-8"); System.out.println(org.apache.xalan.Version.getVersion()); Transformer transformer = xalanTransFact.newTransformer(new StreamSource(new StringReader(XSLT))); transformer.setOutputProperty(OutputKeys.INDENT, "yes"); transformer.setOutputProperty(OutputKeys.METHOD, "xml"); transformer.setOutputProperty(OutputKeys.ENCODING, "utf-8"); transformer.transform( new StreamSource(new StringReader(EXAMPLE)), new StreamResult(writer)); } catch (UnsupportedEncodingException ex) { Logger.getLogger(DynEvaluateTransform.class.getName()).log(Level.SEVERE, null, ex); } catch (FileNotFoundException ex) { Logger.getLogger(DynEvaluateTransform.class.getName()).log(Level.SEVERE, null, ex); } catch (TransformerConfigurationException ex) { Logger.getLogger(DynEvaluateTransform.class.getName()).log(Level.SEVERE, null, ex); } catch (TransformerException ex) { Logger.getLogger(DynEvaluateTransform.class.getName()).log(Level.SEVERE, null, ex); } finally { if (writer != null) { try { writer.close(); } catch (IOException ex) { } } } } private void rebuildInput() { // ignore - this just writes the input.xml file, so we can later reference it StringReader strReader = null; OutputStreamWriter fileWriter = null; try { String fileName = getLocalFileName("input.xml"); strReader = new StringReader(INPUT); File file = new File(fileName); fileWriter = new OutputStreamWriter(new FileOutputStream(file), "UTF-8"); TransformerFactory factory = TransformerFactory.newInstance(); Transformer transformer = factory.newTransformer(); transformer.setOutputProperty(OutputKeys.INDENT, "yes"); transformer.setOutputProperty(OutputKeys.METHOD, "xml"); transformer.transform( new StreamSource(strReader), new StreamResult(fileWriter)); } catch (UnsupportedEncodingException ex) { Logger.getLogger(DynEvaluateTransform.class.getName()).log(Level.SEVERE, null, ex); } catch (FileNotFoundException ex) { Logger.getLogger(DynEvaluateTransform.class.getName()).log(Level.SEVERE, null, ex); } catch (TransformerConfigurationException ex) { Logger.getLogger(DynEvaluateTransform.class.getName()).log(Level.SEVERE, null, ex); } catch (TransformerException ex) { Logger.getLogger(DynEvaluateTransform.class.getName()).log(Level.SEVERE, null, ex); } catch (IOException ex) { Logger.getLogger(DynEvaluateTransform.class.getName()).log(Level.SEVERE, null, ex); } finally { if (strReader != null) { strReader.close(); } if (fileWriter != null) { try { fileWriter.close(); } catch (IOException ex) { } } } } public static void main(String[] args) { DynEvaluateTransform det = new DynEvaluateTransform(); det.rebuildInput(); det.applyTransform(); } private static String getLocalFileName(String href) { String name = System.getProperty("user.dir"); if (!name.endsWith(File.separator)) { name += File.separator; } name += href; return name; } private static class Resolver implements URIResolver { @Override public Source resolve(String href, String base) throws TransformerException { if ("input.xml".equals(href)) { return new StreamSource(new File(DynEvaluateTransform.getLocalFileName(href))); } else { return null; } } } }