X-Git-Url: https://gerrit.simantics.org/r/gitweb?p=simantics%2Fplatform.git;a=blobdiff_plain;f=bundles%2Forg.simantics.db.layer0%2Fsrc%2Forg%2Fsimantics%2Fdb%2Flayer0%2Futil%2FLayer0Utils.java;h=5ccfcf325f49df3f919f6ee54f34b3d0f2033960;hp=198ee41b77e060ad4cdf205e46a10038cbaa494b;hb=3f5adda763f6281e9988277d067c1f71615e3da2;hpb=3e8cd4aef089a228d7f2e141f2b2159f820a4266

diff --git a/bundles/org.simantics.db.layer0/src/org/simantics/db/layer0/util/Layer0Utils.java b/bundles/org.simantics.db.layer0/src/org/simantics/db/layer0/util/Layer0Utils.java
index 198ee41b7..5ccfcf325 100644
--- a/bundles/org.simantics.db.layer0/src/org/simantics/db/layer0/util/Layer0Utils.java
+++ b/bundles/org.simantics.db.layer0/src/org/simantics/db/layer0/util/Layer0Utils.java
@@ -1387,4 +1387,18 @@ public class Layer0Utils {
         return PrettyPrintTG.print(tg, ignoreIdentifiers);
     }
 
+    public static Resource getPossibleAssertedObject(ReadGraph graph, Resource resource, Resource predicate) throws DatabaseException {
+    	Resource result = null;
+    	for(Resource type : graph.getPrincipalTypes(resource)) {
+    		Collection<Resource> rs = graph.getAssertedObjects(type, predicate);
+    		if(rs.size() > 1) return null;
+    		if(rs.size() == 1) {
+    			Resource ass = rs.iterator().next();
+    			if (result != null && !result.equals(ass)) return null;
+    			result = ass;
+    		}
+    	}
+    	return result;
+    }
+    
 }