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Date: Thu, 25 Sep 2003 21:20:02 +0100
Subject: Re: [digester] Rule for processing instruction?
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From: robert burrell donkin <robertburrelldonkin@blueyonder.co.uk>
To: "Jakarta Commons Users List" <commons-user@jakarta.apache.org>
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Message-Id: <A4CB431E-EF95-11D7-8387-003065DC754C@blueyonder.co.uk>

hi janek

i don't see any reason why we shouldn't put something to allow access to=20=

processing instructions into digester. this probably means storing the=20=

indexed processing instruction (just as your example code does). =
probably=20
worth giving a getting for the keys as well as a per-instruction getter.=20=

rules would be able to access these properties during their execution by=20=

calling the properties on digester.

1. can anyone see any issues with this approach?
2. can anyone think of anything i've forgotten?

- robert

On Thursday, September 25, 2003, at 12:10 PM, Janek Bogucki wrote:

> On Wed, 2003-09-24 at 15:25, Norbert Pabi=B6 wrote:
>> Uda=B3o Ci si=EA znale=BC=E6 regu=B3e na processing instruction?
>>
>>
>> --
>> Norbert Pabi=B6
>>
>>
>
> 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 =3D new PIDigester () ;
>
>    // set-up
>
>    d.parse () ;
>
>    String myPIvalue =3D (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 =3D 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 ) !=3D null )
>             throw new SAXException ( "target already encountered: " +
> target ) ;
>
>         processingInstructions.put ( target, data ) ;
>     }
>
>
> }
>
>
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