XOM API for Processing XML with Java

[Michael Kay <mike AT saxonica.com>]

> What should I do to solve my bug ?

Examine the stack trace. If you don't understand it, post it here, where 
there's a good chance that someone will.

Michael Kay
Saxonica



On 15/06/2010 20:10, Thomas LEDUC wrote:
> Dear list-members,
>
> I would like to benefit from XOM recursive XInclude ability. That's why,
> I've given XALAN up. With XALAN, I was able to combine a (single)
> XInclude with an EntityResolver (the x-included XML was located in the
> JAR file and activated as a ResourceStream trough an EntityResolver) and
> a XSLT Transform.
>
> What I want right now is tu use XOM so as to combine 2 or 3 levels of
> recursive XInclude with an EntityResolver (so as to x-include the XML
> located as resources in the JAR file) and a XSLT transform. To achieve
> such an objective, I've tried to follow P. Taylor's intructions (thanks
> to him) described in the following post :
>      https://lists.ibiblio.org/sympa/arc/xom-interest/2009-August/003977.html
>
> To reproduce the process I want to do, I've developed the small use case
> presented below. Unfortunately, the following independent class (that
> replaces class.getResourceAsStream by ByteArrayInputStream : XML2 is
> x-included in XML1) compiles but crashes during execution. Do you know
> why ? What should I do to solve my bug ?
>
> Many thanks for your help,
>
> import java.io.*;
> import javax.xml.parsers.SAXParserFactory;
> import nu.xom.*;
> import nu.xom.xinclude.XIncluder;
> import nu.xom.xslt.XSLTransform;
> import org.xml.sax.*;
>
> public class MyXomTest {
>      private static final String XML1 = "<?xml version='1.0'><aa
> xmlns:xi='http://www.w3.org/2001/XInclude'><xi:include
> href='foo.xml'/><dd/></aa>";
>      private static final String XML2 = "<?xml version='1.0'?><bb><cc
> name='foo'/></bb>";
>      private static final String XSLT_IDENTITY = "<?xml version='1.0'?>"
>              + "<xsl:stylesheet version='1.0'
> xmlns:xsl=\"http://www.w3.org/1999/XSL/Transform\";>"
>              + "<xsl:template match='node()|@*'>" +"<xsl:copy>"
>              + "<xsl:apply-templates select='@*|node()'/>" +"</xsl:copy>"
>              + "</xsl:template>" +"</xsl:stylesheet>";
>
>      public static class MyEntityResolver implements EntityResolver {
>          @Override
>          public InputSource resolveEntity(String arg0, String arg1)
>                  throws SAXException, IOException {
>              InputStream inputStream = new
> ByteArrayInputStream(XML2.getBytes());
>              InputSource inputSource = new InputSource(inputStream);
>              inputSource.setSystemId(AConsoleCommand.USER_DIR);
>              return inputSource;
>          }
>      }
>
>      public static void main(String[] args) throws Exception {
>          SAXParserFactory saxParserFactory = SAXParserFactory.newInstance();
>          saxParserFactory.setNamespaceAware(true);
>          saxParserFactory.setXIncludeAware(true);
>          XMLReader x = saxParserFactory.newSAXParser().getXMLReader();
>          x.setEntityResolver(new MyEntityResolver());
>
>          Builder builder = new Builder(x);
>          Document input = builder
>                  .build(new ByteArrayInputStream(XML1.getBytes()));
>          Document intermed_result = XIncluder.resolve(input, builder);
>          Document stylesheet = builder.build(new ByteArrayInputStream(
>                  XSLT_IDENTITY.getBytes()));
>          XSLTransform transform = new XSLTransform(stylesheet);
>          Nodes output = transform.transform(intermed_result);
>          Document result = XSLTransform.toDocument(output);
>          System.out.println(result.toXML());
>      }
> }
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