[DL-Learner SVN] SF.net SVN: dl-learner:[3395] trunk/scripts/src/main/java/org/dllearner/ scripts/SPARQLSampleDebugging.java

[<lor...@us...>]

Revision: 3395
          http://dl-learner.svn.sourceforge.net/dl-learner/?rev=3395&view=rev
Author:   lorenz_b
Date:     2011-11-11 09:22:08 +0000 (Fri, 11 Nov 2011)
Log Message:
-----------
Added method to select resources randomly - very slow.

Modified Paths:
--------------
    trunk/scripts/src/main/java/org/dllearner/scripts/SPARQLSampleDebugging.java

Modified: trunk/scripts/src/main/java/org/dllearner/scripts/SPARQLSampleDebugging.java
===================================================================
--- trunk/scripts/src/main/java/org/dllearner/scripts/SPARQLSampleDebugging.java	2011-11-10 14:58:27 UTC (rev 3394)
+++ trunk/scripts/src/main/java/org/dllearner/scripts/SPARQLSampleDebugging.java	2011-11-11 09:22:08 UTC (rev 3395)
@@ -55,6 +55,28 @@
 		return resources;
 	}
 	
+	private Set<String> extractSampleResourcesRandom(int size){
+		logger.info("Extracting " + sampleSize + "sample resources...");
+		long startTime = System.currentTimeMillis();
+		Set<String> resources = new HashSet<String>();
+		
+		String query = "SELECT COUNT(DISTINCT ?s) WHERE {?s a ?type}";
+		ResultSet rs = SparqlQuery.convertJSONtoResultSet(cache.executeSelectQuery(endpoint, query));
+		int max = rs.next().getLiteral(rs.getResultVars().get(0)).getInt();
+		
+		for(int i = 0; i < size; i++){
+			int random = (int)(Math.random() * max);
+			query = String.format("SELECT DISTINCT ?s WHERE {?s a ?type} LIMIT 1 OFFSET %d", random);
+			System.out.println(random);
+			rs = SparqlQuery.convertJSONtoResultSet(cache.executeSelectQuery(endpoint, query));
+			resources.add(rs.next().getResource("s").getURI());System.out.println(resources);
+		}
+		
+		
+		logger.info("...done in " + (System.currentTimeMillis()-startTime) + "ms.");
+		return resources;
+	}
+	
 	private OWLOntology extractSampleModule(Set<String> resources){
 		logger.info("Extracting sample module...");
 		long startTime = System.currentTimeMillis();
@@ -94,8 +116,8 @@
 		OWLOntology sample;
 		OWLOntology merged;
 		OWLReasoner reasoner;
-		for(int i = 0; i < 10; i++){
-			Set<String> resources = extractSampleResources(i * sampleSize);
+		for(int i = 0; i < 1; i++){
+			Set<String> resources = extractSampleResourcesRandom(sampleSize);
 			sample = extractSampleModule(resources);
 			
 			Set<OWLOntology> ontologies = new HashSet<OWLOntology>();

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