[rules-users] Parsing XML using Drools

[Mark Proctor]

Drools has no native understanding of SAX or DOM. But if using JAXB or 
something doesn't suffice there is also the SXC project which is quite nice.
http://sxc.codehaus.org/

Mark

Anstis, Michael (M.) wrote:
> I am not sure on what you are trying to achieve.
>  
> Drools is a Rule Engine and not a XML parser; the nearest I could find 
> to what you are reporting ("I know XML Streaming is possible in 
> Drools") is the following. 
>  
> http://netzooid.com/blog/2007/03/16/sxc-simple-xml-compiler-jaxb-runtime-streaming-xpath-implementation-and-more/
>  
> Can you enlighten me with your knowledge of XML Streaming in Drools?
>
>     ------------------------------------------------------------------------
>     *From:* Gupta, Ankit (Ankit) [mailto:gupta11 at avaya.com]
>     *Sent:* 29 January 2009 10:04
>     *To:* Anstis, Michael (M.)
>     *Subject:* RE: [rules-users] Parsing XML using Drools
>
>     Hi Mike,
>                 Thanks for prompt reply ,
>     Actually right now I am streaming the xml
>
>     <BenchmarkResultsFor>
>
>        <Benchmark>DataProcessing</Benchmark>
>
>        <Workload>1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15,
>     16</Workload>
>
>        <Memory>4, 4, 4, 8, 8, 12, 12, 16, 24, 24, 24, 24, 24, 24, 24,
>     24</Memory>
>
>     </BenchmarkResultsFor>
>
>      
>
>     here we are using apache math api for interpolation
>
>      
>
>     * *
>
>     *public* MemoryBenchmarkResult(String name, *double*[] x,
>     *double*[] y) {
>
>     *this*.hostFunction = name;
>
>     // Create the interpolation function
>
>     SplineInterpolator i1 = *new* SplineInterpolator();
>
>     *this*.workload = x;
>
>     *this*.memory = y;
>
>     *this*.interpolator = i1.interpolate(*this*.workload, *this*.memory);
>
>     }
>
>      
>
>     here we are passing the values of X Axis (Workload) and we get the
>     values of Y Axis (Memory ). Reading or Streaming of this XML are
>     doing using SAX .
>
>     This thing I want to do with Drools ...... as I know XML Streaming
>     is possible in Drools  .
>
>      
>
>      
>
>     Regards
>
>     Ankit
>
>      
>
>      
>
>      
>
>
>     ------------------------------------------------------------------------
>     *From:* rules-users-bounces at lists.jboss.org
>     [mailto:rules-users-bounces at lists.jboss.org] *On Behalf Of
>     *Anstis, Michael (M.)
>     *Sent:* Thursday, January 29, 2009 2:48 PM
>     *To:* Rules Users List
>     *Subject:* RE: [rules-users] Parsing XML using Drools
>
>     It is not clear how you want to use the XML?
>      
>     If the XML represents Facts then you could use a worker Fact and
>     "FROM" to deserialise them and make them available to WM. For
>     example:-
>      
>     rule "get some XML facts"
>         when
>             $w : Worker()
>             Cheese( ) from $w.getCheesesFromXML();
>         then
>             //Do something with cheese
>         end
>      
>     Obviously the XML need not be true serialised objects (in a JAXB
>     sense) but simply the properties that "getCheeseFromXML" rehydrates.
>      
>     Drools is not exposing any of the XML libraries; they are merely
>     used by your code. The above would be (partially) equivalent to:-
>      
>     Worker w = new Worker();
>     List<Cheese> cheeses = w.getCheesesFromXML();
>     for(Cheese c : cheeses) {
>         wm.insert(c);
>     }
>      
>     rule "Cheese pre-loaded"
>         when
>             Cheese( )
>         then
>             //Do something with cheese
>         end
>      
>     Partially equivalent as you could retract Cheese( ) in the second
>     way which would affect truth maintenance whereas the first way
>     would (I believe) not.
>      
>     With kind regards,
>      
>     Mike
>
>         ------------------------------------------------------------------------
>         *From:* rules-users-bounces at lists.jboss.org
>         [mailto:rules-users-bounces at lists.jboss.org] *On Behalf Of
>         *Gupta, Ankit (Ankit)
>         *Sent:* 29 January 2009 07:22
>         *To:* rules-users at lists.jboss.org
>         *Subject:* [rules-users] Parsing XML using Drools
>
>         Hi All,
>                   How can we read and parse a XML file using drools ?
>          
>         Does Drools support the SAX or DOM parsing .
>          
>          
>         Regards
>          
>         Ankit
>
>
> ------------------------------------------------------------------------
>
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