[rules-users] Parsing XML using Drools

[Anstis, Michael (M.)]

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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