I want to parse the following XML document to resolve all entities in it:
<!DOCTYPE doc SYSTEM 'mydoc.dtd'>
<doc>&title;</doc>
My EntityResolver is supposed to fetch the external entity with the given system ID from the database and then do the resolution, see below for an illustration:
private static class MyEntityResolver
{
public InputSource resolveEntity(String publicId, String systemId)
throws SAXException, IOException
{
// At this point, systemId is always absolutized to the current working directory,
// even though the XML document specified it as relative.
// E.g. "file:///H:/mydoc.dtd" instead of just "mydoc.dtd"
// Why??? How can I prevent this???
SgmlEntity entity = findEntityFromDatabase(systemId);
InputSource is = new InputSource(new ByteArrayInputStream(entity.getContents()));
is.setPublicId(publicId);
is.setSystemId(systemId);
return is;
}
}
I tried both using DOM (DocumentBuilder) and SAX (XMLReader), set the entity resolver to MyEntityResolver (i.e. setEntityResolver(new MyEntityResolver())
), but systemId
in MyEntityResolver#resolveEntity(String publicId, String systemId)
is always being absolutized to the current working directory.
I also tried calling setFeature("http://xml.org/sax/features/resolve-dtd-uris", false);
, but that didn't help anything.
So how can I achieve what I wanted?
Thanks!
Apparently, there is another interface called EntityResolver2 which is the extension of the old EntityResolver. (Talk about confusing names!)
Anyway, I found that EntityResolver2
achieved what I wanted, that is, it does not make any changes to the systemId
, so it will always exactly be what was specified in the XML document.