Migrated source code from Simantics SVN

[simantics/platform.git] / bundles / org.simantics.db.common / src / org / simantics / db / common / request / PossibleOwner.java

diff --git a/bundles/org.simantics.db.common/src/org/simantics/db/common/request/PossibleOwner.java b/bundles/org.simantics.db.common/src/org/simantics/db/common/request/PossibleOwner.java
new file mode 100644 (file)
index 0000000..cd91d9f
--- /dev/null
+++ b/bundles/org.simantics.db.common/src/org/simantics/db/common/request/PossibleOwner.java
@@ -0,0 +1,25 @@
+package org.simantics.db.common.request;\r
+\r
+import java.util.Collections;\r
+\r
+import org.simantics.db.ReadGraph;\r
+import org.simantics.db.Resource;\r
+import org.simantics.db.common.utils.CommonDBUtils;\r
+import org.simantics.db.exception.DatabaseException;\r
+import org.simantics.layer0.Layer0;\r
+\r
+public class PossibleOwner extends ResourceRead<Resource> {\r
+\r
+    public PossibleOwner(Resource resource) {\r
+        super(resource);\r
+    }\r
+\r
+    @Override\r
+    public Resource perform(ReadGraph graph) throws DatabaseException {\r
+        Layer0 L0 = Layer0.getInstance(graph);\r
+        Resource directOwner = graph.getPossibleObject(resource, L0.IsOwnedBy);\r
+        if(directOwner != null) return directOwner;\r
+        return CommonDBUtils.getNearestOwner(graph, Collections.singleton(resource));\r
+    }\r
+    \r
+}
\ No newline at end of file