Problems in org.apache.xml.utils.SystemIDResolver.java

[Christian Bjørnbak <bj...@iuas.dk>]

Hi I've found some problems (bugs) in
org.apache.xml.utils.SystemIDResolver.java...

I use Xerces and Xalan in Tomcat on Linix.

I use ServletContext.getRealPath("/home/docroot/template/adm/adm.xml") to
locate a XML, parse it a DOM and create a DOMSource with the constructor
DOMSource(DocumentNode, "/home/docroot/template/adm/adm.xml");

Then I use TransformerFactory.getAssociatedStylesheet(DOMSource, null, null,
null); to find the stylesheet.

In the xml file the stylesheet tag is the following:

<?xml-stylesheet type="text/xsl" href="xslt/html.xsl"?>

But trying to run Transformer.transform() I get a:

javax.xml.transform.TransformerConfigurationException: File
"file:////var/tomcat//home/docroot/template/adm/xslt/html.xsl" not found.

Where /var/tomcat is the directory where I started tomcat from (a.k.a. the
user-dir).

I checked out org.apache.xml.utils.SystemIDResolver.java and found the
following problems (bugs?).

In getAbsoluteURI the following test is made to decide whether a url is
absolute or relative

    if ((urlString.indexOf(':') < 0) && (null != base)
            && (base.indexOf(':') < 0))
    {
        base = getAbsoluteURIFromRelative(base);
    }

If there is a : (colon) it's an absolute URI..

Problems:

1. If no colon is present it's considered a relative url and
getAbsoluteURIFromRelative() prepends file:// and userdir. But my path is
and absolute except for missing "file://".

2. If I was running on Windows the path would have been
C:\home\docroot\template\adm\xslt\html.xsl it would have been concidered an
absolute url eventhough it doesn't contain a file://....

Maybe the tes could be replaced by the following rules:

If it doesn't contain file://, http://, ftp:// or another URI prefix
(generalized to something+://) concidered a incomplete URI.

If it on a Unix platform starts with / it's a absolutepath and a file:// is
simply prepended.

If it on a Windows platform starts with letter+colon it's a absolutepath and
a file:// is simply prepended.

Does this make sence?? Or am I using Xalan wrong???

/Christian