X-Git-Url: https://gerrit.simantics.org/r/gitweb?a=blobdiff_plain;f=bundles%2Forg.simantics.db.layer0%2Fsrc%2Forg%2Fsimantics%2Fdb%2Flayer0%2Fproperty%2FProperties.java;fp=bundles%2Forg.simantics.db.layer0%2Fsrc%2Forg%2Fsimantics%2Fdb%2Flayer0%2Fproperty%2FProperties.java;h=5d5a1183b2794dd8986ee871b6f63f9d02b7e156;hb=969bd23cab98a79ca9101af33334000879fb60c5;hp=0000000000000000000000000000000000000000;hpb=866dba5cd5a3929bbeae85991796acb212338a08;p=simantics%2Fplatform.git

diff --git a/bundles/org.simantics.db.layer0/src/org/simantics/db/layer0/property/Properties.java b/bundles/org.simantics.db.layer0/src/org/simantics/db/layer0/property/Properties.java
new file mode 100644
index 000000000..5d5a1183b
--- /dev/null
+++ b/bundles/org.simantics.db.layer0/src/org/simantics/db/layer0/property/Properties.java
@@ -0,0 +1,68 @@
+package org.simantics.db.layer0.property;
+
+import java.util.ArrayList;
+import java.util.Collections;
+
+import org.simantics.databoard.Bindings;
+import org.simantics.databoard.binding.Binding;
+import org.simantics.db.ReadGraph;
+import org.simantics.db.Resource;
+import org.simantics.db.Statement;
+import org.simantics.db.exception.DatabaseException;
+import org.simantics.operation.Layer0X;
+
+/**
+ * @author Antti Villberg
+ * TODO: consider removing since this doesn't seem to be used.
+ */
+public class Properties {
+	
+	public static <T> T getPossibleRelatedValue(ReadGraph graph, Resource resource, Resource relation, Binding binding) throws DatabaseException {
+		
+		T result = graph.getPossibleRelatedValue(resource, relation, binding);
+		if(result != null) return result;
+		else {
+			
+		    Layer0X L0X = Layer0X.getInstance(graph);
+			ArrayList<OrderedResource> order = new ArrayList<OrderedResource>();
+			for(Statement stm : graph.getStatements(resource, L0X.ObtainsProperty)) {
+				Integer position = graph.getRelatedValue(stm.getPredicate(), L0X.NaturalNumberOrderRelation, Bindings.INTEGER);
+				order.add(new OrderedResource(position, stm.getObject()));
+			}
+			Collections.sort(order);
+			for(OrderedResource or : order) {
+				result = getPossibleRelatedValue(graph, or.r, relation, binding);
+				if(result != null) return result;
+			}
+			
+			return null;
+			
+		}
+		
+	}
+
+	public static <T> T getPossibleRelatedAdapter(ReadGraph graph, Resource resource, Resource relation, Class<T> clazz) throws DatabaseException {
+
+		T result = graph.getPossibleRelatedAdapter(resource, relation, clazz);
+		if(result != null) return result;
+		else {
+			
+		    Layer0X L0X = Layer0X.getInstance(graph);
+			ArrayList<OrderedResource> order = new ArrayList<OrderedResource>();
+			for(Statement stm : graph.getStatements(resource, L0X.ObtainsProperty)) {
+				Integer position = graph.getRelatedValue(stm.getPredicate(), L0X.NaturalNumberOrderRelation, Bindings.INTEGER);
+				order.add(new OrderedResource(position, stm.getObject()));
+			}
+			Collections.sort(order);
+			for(OrderedResource or : order) {
+				result = getPossibleRelatedAdapter(graph, or.r, relation, clazz);
+				if(result != null) return result;
+			}
+			
+			return null;
+			
+		}
+		
+	}
+
+}