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Hi Andrew,
Sorry, I spoke too soon. This works in oXygen and I thought it was just
this feature... but we actually needed to work low level for that.
One trick that you can use is to take advantage of the fact that a
parser in non validating mode is not required to actually read the DTD.
You need to have a DTD specified though in the XML file. You will get
the entity notification on the ContentHandler skippedEntity callback.
See for instance the following class that gives the output below:
file:///D:/users/george/workspace/test/foo.dtd
Start ent: [dtd]
End ent: [dtd]
Skipped entity: euro
import java.io.IOException;
import java.io.StringReader;
import org.xml.sax.InputSource;
import org.xml.sax.SAXException;
import org.xml.sax.XMLReader;
import org.xml.sax.ext.LexicalHandler;
import org.xml.sax.helpers.XMLFilterImpl;
import org.xml.sax.helpers.XMLReaderFactory;
public class Test extends XMLFilterImpl implements LexicalHandler {
public static void main(String[] args) throws Exception {
new Test();
}
public Test() throws Exception {
String xml = "<!DOCTYPE foo SYSTEM 'foo.dtd'><foo>foo €
bar</foo>";
XMLReader xmlReader =
XMLReaderFactory.createXMLReader("org.apache.xerces.parsers.SAXParser");
xmlReader.setProperty("http://xml.org/sax/properties/lexical-handler",
this);
xmlReader.setEntityResolver(this);
xmlReader.setContentHandler(this);
xmlReader.parse(new InputSource(new StringReader(xml)));
}
public InputSource resolveEntity(String publicId, String systemId)
throws SAXException, IOException {
System.out.println(systemId);
return new InputSource(new StringReader(""));
}
public void startDocument() throws SAXException {
super.startDocument();
}
public void skippedEntity(String name) throws SAXException {
System.out.println("Skipped entity: " + name);
}
public void startEntity(String name) throws SAXException {
System.out.println("Start ent: " + name);
}
public void endEntity(String name) throws SAXException {
System.out.println("End ent: " + name);
}
public void startCDATA() throws SAXException {}
public void endCDATA() throws SAXException {}
public void startDTD(String name, String publicId, String systemId)
throws SAXException {}
public void endDTD() throws SAXException {}
public void comment(char[] ch, int start, int length) throws
SAXException {}
}
Or you can just remove the fake resolver and use instead:
xmlReader.setFeature("http://apache.org/xml/features/nonvalidating/load-external-dtd",
false);
that will give you as output
Skipped entity: euro
Hope that helps,
George
--
George Cristian Bina
<oXygen/> XML Editor, Schema Editor and XSLT Editor/Debugger
http://www.oxygenxml.com
Andrew Welch wrote:
> Hi George,
>
> 2008/12/8 George Cristian Bina <george@o...>:
>> Try setting http://xml.org/sax/features/external-general-entities to false.
>> See also:
>> http://xerces.apache.org/xerces2-j/features.html#external-general-entities
>
> Thanks, but same result.
>
> Should this work? (maybe a problem with that verison of Xerces) Or
> will it never work because of some fundamental dtd concept that
> sgml'ers all treat as common knowledge? :)
>
>
>
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