[DL-Learner SVN] SF.net SVN: dl-learner:[4222] trunk/components-core/src/main/java/org/ dllearner/reasoning/SPARQLReasoner.java

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

Revision: 4222
          http://sourceforge.net/p/dl-learner/code/4222
Author:   lorenz_b
Date:     2014-02-12 13:58:05 +0000 (Wed, 12 Feb 2014)
Log Message:
-----------
Added method to get non empty classes.

Modified Paths:
--------------
    trunk/components-core/src/main/java/org/dllearner/reasoning/SPARQLReasoner.java

Modified: trunk/components-core/src/main/java/org/dllearner/reasoning/SPARQLReasoner.java
===================================================================
--- trunk/components-core/src/main/java/org/dllearner/reasoning/SPARQLReasoner.java	2014-02-11 16:48:02 UTC (rev 4221)
+++ trunk/components-core/src/main/java/org/dllearner/reasoning/SPARQLReasoner.java	2014-02-12 13:58:05 UTC (rev 4222)
@@ -791,6 +791,18 @@
 		return types;
 	}
 	
+	public Set<NamedClass> getNonEmptyOWLClasses() {
+		Set<NamedClass> types = new HashSet<NamedClass>();
+		String query = String.format("SELECT DISTINCT ?class WHERE {?class a <%s>. FILTER EXISTS{?a a ?class}}",OWL.Class.getURI());
+		ResultSet rs = executeSelectQuery(query);
+		QuerySolution qs;
+		while(rs.hasNext()){
+			qs = rs.next();
+			types.add(new NamedClass(qs.getResource("class").getURI()));
+		}
+		return types;
+	}
+	
 	public SortedSet<NamedClass> getOWLClasses(String namespace) {
 		SortedSet<NamedClass> types = new TreeSet<NamedClass>();
 		String query = "SELECT DISTINCT ?class WHERE {?class a <" + OWL.Class.getURI() + ">.";
@@ -851,7 +863,9 @@
 		QuerySolution qs;
 		while(rs.hasNext()){
 			qs = rs.next();
-			siblings.add(new NamedClass(qs.getResource("sub").getURI()));
+			if(qs.get("sub").isURIResource()){
+				siblings.add(new NamedClass(qs.getResource("sub").getURI()));
+			}
 		}
 		return siblings;
 	}

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