--- /dev/null
+package org.simantics.db.layer0.property;\r
+\r
+import java.util.ArrayList;\r
+import java.util.Collections;\r
+\r
+import org.simantics.databoard.Bindings;\r
+import org.simantics.databoard.binding.Binding;\r
+import org.simantics.db.ReadGraph;\r
+import org.simantics.db.Resource;\r
+import org.simantics.db.Statement;\r
+import org.simantics.db.exception.DatabaseException;\r
+import org.simantics.operation.Layer0X;\r
+\r
+/**\r
+ * @author Antti Villberg\r
+ * TODO: consider removing since this doesn't seem to be used.\r
+ */\r
+public class Properties {\r
+ \r
+ public static <T> T getPossibleRelatedValue(ReadGraph graph, Resource resource, Resource relation, Binding binding) throws DatabaseException {\r
+ \r
+ T result = graph.getPossibleRelatedValue(resource, relation, binding);\r
+ if(result != null) return result;\r
+ else {\r
+ \r
+ Layer0X L0X = Layer0X.getInstance(graph);\r
+ ArrayList<OrderedResource> order = new ArrayList<OrderedResource>();\r
+ for(Statement stm : graph.getStatements(resource, L0X.ObtainsProperty)) {\r
+ Integer position = graph.getRelatedValue(stm.getPredicate(), L0X.NaturalNumberOrderRelation, Bindings.INTEGER);\r
+ order.add(new OrderedResource(position, stm.getObject()));\r
+ }\r
+ Collections.sort(order);\r
+ for(OrderedResource or : order) {\r
+ result = getPossibleRelatedValue(graph, or.r, relation, binding);\r
+ if(result != null) return result;\r
+ }\r
+ \r
+ return null;\r
+ \r
+ }\r
+ \r
+ }\r
+\r
+ public static <T> T getPossibleRelatedAdapter(ReadGraph graph, Resource resource, Resource relation, Class<T> clazz) throws DatabaseException {\r
+\r
+ T result = graph.getPossibleRelatedAdapter(resource, relation, clazz);\r
+ if(result != null) return result;\r
+ else {\r
+ \r
+ Layer0X L0X = Layer0X.getInstance(graph);\r
+ ArrayList<OrderedResource> order = new ArrayList<OrderedResource>();\r
+ for(Statement stm : graph.getStatements(resource, L0X.ObtainsProperty)) {\r
+ Integer position = graph.getRelatedValue(stm.getPredicate(), L0X.NaturalNumberOrderRelation, Bindings.INTEGER);\r
+ order.add(new OrderedResource(position, stm.getObject()));\r
+ }\r
+ Collections.sort(order);\r
+ for(OrderedResource or : order) {\r
+ result = getPossibleRelatedAdapter(graph, or.r, relation, clazz);\r
+ if(result != null) return result;\r
+ }\r
+ \r
+ return null;\r
+ \r
+ }\r
+ \r
+ }\r
+\r
+}\r