¿Se sabe que dyn: evaluar la función de extensión tiene problemas en Xalan-J 2.7.1?
Estoy perplejo de por qué el siguiente programa de ejemplo se niega a aplicar mi hoja de estilo correctamente. Parece quedyn:evaluate en Xalan 2.7.1 se niega a procesar ciertas variables XPath.
Ejecutando el siguiente programa conxalan-j en classpath produce los siguientes resultados:
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 = "" +
"<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n" +
"<xsl:stylesheet xmlns:xsl=\"http://www.w3.org/1999/XSL/Transform\"\n" +
" xmlns:det=\"org:example:DynEvaluateTransform\"\n" +
" xmlns:dyn=\"http://exslt.org/dynamic\"\n" +
" extension-element-prefixes=\"dyn\"\n" +
" version=\"1.0\">\n" +
" \n" +
" <xsl:variable name=\"input-doc\" select=\"document('input.xml', /)\" />\n" +
" <xsl:variable name=\"selections\" select=\"$input-doc/det:selections\" />\n" +
" \n" +
" <xsl:template match=\"/\">\n" +
" <xsl:choose>\n" +
" <xsl:when test=\"function-available('dyn:evaluate')\">\n" +
" <xsl:message>dyn:evaluate available</xsl:message>\n" +
" </xsl:when>\n" +
" <xsl:otherwise>\n" +
" <xsl:message>dyn:evaluate not available</xsl:message>\n" +
" </xsl:otherwise>\n" +
" </xsl:choose>\n" +
" <xsl:message>input.xml content:</xsl:message>\n" +
" <xsl:for-each select=\"$selections/*\">\n" +
" <xsl:message>{<xsl:value-of select=\"namespace-uri()\"/>}<xsl:value-of select=\"local-name()\"/></xsl:message>\n" +
" </xsl:for-each> \n" +
" <xsl:for-each select=\"//@condition\">\n" +
" <xsl:message><xsl:value-of select=\".\"/></xsl:message>\n" +
" <xsl:message><xsl:value-of select=\"string(dyn:evaluate(string(.)))\"/></xsl:message>\n" +
" </xsl:for-each>\n" +
" </xsl:template>\n" +
" \n" +
"</xsl:stylesheet>";
private static final String EXAMPLE = "" +
"<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n" +
"<foos xmlns=\"org:example:DynEvaluateTransform\"> \n" +
" <foo condition=\"true()\" /> \n" +
" <foo condition=\"false()\" /> \n" +
" <foo condition=\"false() or true()\" />\n" +
" <foo condition=\"$selections\" />\n" +
" <foo condition=\"$selections/*\" />\n" +
" <foo condition=\"$selections/*[local-name()='a']\" />\n" +
" <foo condition=\"$selections/element::node()[local-name()='a']\" />\n" +
" <foo condition=\"local-name($selections/*)\" />\n" +
" <foo condition=\"not($selections/*[local-name()='a' and namespace-uri()='org:example:foo'])\" />\n" +
" <foo condition=\"$selections/*[local-name()='b' and namespace-uri()='org:example:foo']\" />\n" +
" <foo condition=\"$selections/*[local-name()='c' and namespace-uri()='org:example:foo']\" />\n" +
" <foo condition=\"not($selections/*[local-name()='a' and namespace-uri()='org:example:foo']) or ($selections/*[local-name()='b' and namespace-uri()='org:example:foo'] and $selections/*[local-name()='c' and namespace-uri()='org:example:foo'])\" />\n" +
"</foos>";
private static final String INPUT = "" +
"<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n" +
"<selections xmlns=\"org:example:DynEvaluateTransform\">\n" +
" <a xmlns=\"org:example:foo\"/>\n" +
" <b xmlns=\"org:example:foo\"/>\n" +
" <c xml,ns=\"org:example:foo\"/>\n" +
"</selections>";
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;
}
}
}
}
Xalan Java 2.7.1
SystemId Unknown; Line #14; Column #30; dyn:evaluate available
SystemId Unknown; Line #20; Column #22; input.xml content:
SystemId Unknown; Line #22; Column #26; {org:example:foo}a
SystemId Unknown; Line #22; Column #26; {org:example:foo}b
SystemId Unknown; Line #22; Column #26; {org:example:foo}c
SystemId Unknown; Line #25; Column #26; true()
SystemId Unknown; Line #26; Column #26; true
SystemId Unknown; Line #25; Column #26; false()
SystemId Unknown; Line #26; Column #26; false
SystemId Unknown; Line #25; Column #26; false() or true()
SystemId Unknown; Line #26; Column #26; true
SystemId Unknown; Line #25; Column #26; $selections
SystemId Unknown; Line #26; Column #26;
SystemId Unknown; Line #25; Column #26; $selections/*
SystemId Unknown; Line #26; Column #26;
SystemId Unknown; Line #25; Column #26; $selections/*[local-name()='a']
SystemId Unknown; Line #26; Column #26;
SystemId Unknown; Line #25; Column #26; $selections/element::node()[local-name()='a']
SystemId Unknown; Line #26; Column #26;
SystemId Unknown; Line #25; Column #26; local-name($selections/*)
SystemId Unknown; Line #26; Column #26;
SystemId Unknown; Line #25; Column #26; not($selections/*[local-name()='a' and namespace-uri()='org:example:foo'])
SystemId Unknown; Line #26; Column #26; true
SystemId Unknown; Line #25; Column #26; $selections/*[local-name()='b' and namespace-uri()='org:example:foo']
SystemId Unknown; Line #26; Column #26;
SystemId Unknown; Line #25; Column #26; $selections/*[local-name()='c' and namespace-uri()='org:example:foo']
SystemId Unknown; Line #26; Column #26;
SystemId Unknown; Line #25; Column #26; not($selections/*[local-name()='a' and namespace-uri()='org:example:foo']) or ($selections/*[local-name()='b' and namespace-uri()='org:example:foo'] and $selections/*[local-name()='c' and namespace-uri()='org:example:foo'])
SystemId Unknown; Line #26; Column #26; true
El programa de ejemplo transforma una entrada de ejemplo (EJEMPLO) utilizando la transformación proporcionada (XSLT), que toma un archivo de entrada (ENTRADA,input.xml), abierto a través dedocument() función, como un "argumento". Este archivo de entrada contiene un conjunto de elementos que se prueban con expresiones XPath (ubicadas en EJEMPLO).
La salida del programa indica que eldyn:evaluate función es compatible, queinput.xml se lee correctamente, las expresiones XPath simples se evalúan correctamente, pero tan pronto como se involucra una variable XPath se rompe.
Versiones legibles de todos los documentos involucrados a continuación.
input.xml
<?xml version="1.0" encoding="UTF-8"?>
<selections xmlns="org:example:DynEvaluateTransform">
<a xmlns="org:example:foo"/>
<b xmlns="org:example:foo"/>
<c xmlns="org:example:foo"/>
</selections>
EJEMPLO
<?xml version="1.0" encoding="UTF-8"?>
<foos xmlns="org:example:DynEvaluateTransform">
<foo condition="true()" />
<foo condition="false()" />
<foo condition="false() or true()" />
<foo condition="$selections" />
<foo condition="$selections/*" />
<foo condition="$selections/*[local-name()='a']" />
<foo condition="$selections/element::node()[local-name()='a']" />
<foo condition="local-name($selections/*)" />
<foo condition="not($selections/*[local-name()='a' and namespace-uri()='org:example:foo'])" />
<foo condition="$selections/*[local-name()='b' and namespace-uri()='org:example:foo']" />
<foo condition="$selections/*[local-name()='c' and namespace-uri()='org:example:foo']" />
<foo condition="not($selections/*[local-name()='a' and namespace-uri()='org:example:foo']) or ($selections/*[local-name()='b' and namespace-uri()='org:example:foo'] and $selections/*[local-name()='c' and namespace-uri()='org:example:foo'])" />
</foos>
XSLT
<?xml version="1.0" encoding="UTF-8"?>
<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
xmlns:det="org:example:DynEvaluateTransform"
xmlns:dyn="http://exslt.org/dynamic"
extension-element-prefixes="dyn"
version="1.0">
<xsl:variable name="input-doc" select="document('input.xml', /)" />
<xsl:variable name="selections" select="$input-doc/det:selections" />
<xsl:template match="/">
<xsl:choose>
<xsl:when test="function-available('dyn:evaluate')">
<xsl:message>dyn:evaluate available</xsl:message>
</xsl:when>
<xsl:otherwise>
<xsl:message>dyn:evaluate not available</xsl:message>
</xsl:otherwise>
</xsl:choose>
<xsl:message>input.xml content:</xsl:message>
<xsl:for-each select="$selections/*">
<xsl:message>{<xsl:value-of select="namespace-uri()"/>}<xsl:value-of select="local-name()"/></xsl:message>
</xsl:for-each>
<xsl:for-each select="//@condition">
<xsl:message><xsl:value-of select="."/></xsl:message>
<xsl:message><xsl:value-of select="string(dyn:evaluate(string(.)))"/></xsl:message>
</xsl:for-each>
</xsl:template>
</xsl:stylesheet>
¿Xalan no admite variables XPath en undyn:evaluate ¿argumento? ¿Estoy definiendo las expresiones correctamente? Intentar ejecutar esta hoja de estilo en oXygen con Xalan seleccionado, informajava.lang.RuntimeException: ElemTemplateElement error: Function not supported! cuando se encuentra por primera vez una variable XPath.
Editar:
He reescrito la pregunta para aclarar cuál es mi problema real.