Speed increase

Some people know I'm working on an application called mac2date. For that application I need to parse XML files present on the Hard Drive. As every XML should do they declare their DTD (or schema for newer systems). But many of the files I read declare it using a path on the internet.
This means the XML parser I use needs to get the online-DTD every time it reads an XML file. That's something that's really really slow. Finally I found a way to override the declared DTD with a local one.

Difference? Speed-increase from 33 seconds to 2 seconds for parsing 100 XML files.

The code

The code:

// construct the documentBuilder (XML parser) and the XPath expressions
documentBuilder = DocumentBuilderFactory.newInstance().newDocumentBuilder();
// override the DTD from the pList file and use a local one
documentBuilder.setEntityResolver(new PListEntityResolver());
// add here the rest of your parsing code

And the needed class:

package org.mac2date;
import org.xml.sax.EntityResolver;
import org.xml.sax.InputSource;
public class PListEntityResolver implements EntityResolver {
  public InputSource resolveEntity (String publicId, String systemId){
    return new InputSource("/System/Library/DTDs/PropertyList.dtd");
  }
}