hi janek
i don't see any reason why we shouldn't put something to allow access to processing instructions into digester. this probably means storing the indexed processing instruction (just as your example code does). probably worth giving a getting for the keys as well as a per-instruction getter. rules would be able to access these properties during their execution by calling the properties on digester.
1. can anyone see any issues with this approach?
2. can anyone think of anything i've forgotten?
Wouldn't some use cases for processing instructions want to depend on the context in which they occurred? If so, it might be nice to invent a syntax where you could match on them in rules, just like we match on element names.
- robert
Craig
On Thursday, September 25, 2003, at 12:10 PM, Janek Bogucki wrote:
On Wed, 2003-09-24 at 15:25, Norbert Pabiś wrote:
Udało Ci się znaleźć regułe na processing instruction?
-- Norbert Pabiś
AFAIK there is no rule set for using PIs when building the data. If you are happy to obtain the PIs after the parse you could adapt this class which collects PIs into a Map. Create an instance of this class and use it as a normal Digester:
Digester d = new PIDigester () ;
// set-up
d.parse () ;
String myPIvalue = (PIDigester)d.getProcessingIntruction ( target ) ;
-Janek
/* * PIDigester.java * * Created on 18 March 2003, 14:34 */
package com.studylink.data.load;
import java.util.HashMap ; import java.util.Map ;
import org.xml.sax.SAXException ;
import org.apache.commons.digester.Digester ;
import com.studylink.utility.StringUtilities ;
/** * A subclass of org.apache.commons.digester.Digester to collect processing * instructions and provide access to these instructions after the parse. * * @author Janek Bogucki * @version $Id: PIDigester.java,v 1.1 2003/03/18 15:41:00 jdb Exp $ */ public class PIDigester extends Digester {
/** * Creates new PIDigester */ public PIDigester () { super () ; }
private Map processingInstructions = new HashMap () ;
public String getProcessingIntruction ( String piTarget ) {
StringUtilities.validateNonZeroLength ( piTarget ) ;
return ( String ) processingInstructions.get ( piTarget ) ; }
/** * @throws SAXException if the target has already been encountered */ public void processingInstruction ( String target, String data) throws SAXException {
/* logging */ super.processingInstruction ( target, data ) ;
if ( getProcessingIntruction ( target ) != null ) throw new SAXException ( "target already encountered: " + target ) ;
processingInstructions.put ( target, data ) ; }
}
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