Migrated source code from Simantics SVN

[simantics/platform.git] / bundles / org.simantics.modeling / src / org / simantics / modeling / subscription / SubscriptionItemsQuery.java

diff --git a/bundles/org.simantics.modeling/src/org/simantics/modeling/subscription/SubscriptionItemsQuery.java b/bundles/org.simantics.modeling/src/org/simantics/modeling/subscription/SubscriptionItemsQuery.java
new file mode 100644 (file)
index 0000000..70d0a7c
--- /dev/null
+++ b/bundles/org.simantics.modeling/src/org/simantics/modeling/subscription/SubscriptionItemsQuery.java
@@ -0,0 +1,57 @@
+/*******************************************************************************\r
+ * Copyright (c) 2007, 2011 Association for Decentralized Information Management in\r
+ * Industry THTH ry.\r
+ * All rights reserved. This program and the accompanying materials\r
+ * are made available under the terms of the Eclipse Public License v1.0\r
+ * which accompanies this distribution, and is available at\r
+ * http://www.eclipse.org/legal/epl-v10.html\r
+ *\r
+ * Contributors:\r
+ *     VTT Technical Research Centre of Finland - initial API and implementation\r
+ *******************************************************************************/\r
+package org.simantics.modeling.subscription;\r
+\r
+import java.util.Collection;\r
+import java.util.HashSet;\r
+import java.util.Set;\r
+\r
+import org.simantics.db.ReadGraph;\r
+import org.simantics.db.Resource;\r
+import org.simantics.db.common.request.UniqueRead;\r
+import org.simantics.db.exception.DatabaseException;\r
+import org.simantics.layer0.Layer0;\r
+import org.simantics.modeling.ModelingResources;\r
+\r
+\r
+/**\r
+ * This query returns all subscription items for a collection of subscriptions. \r
+ */\r
+public class SubscriptionItemsQuery extends UniqueRead<Set<Resource>> {\r
+\r
+       Collection<Resource> resources;\r
+       \r
+    public SubscriptionItemsQuery(Collection<Resource> resources) {\r
+        super();\r
+        this.resources = resources;\r
+    }\r
+\r
+    @Override\r
+    public Set<Resource> perform(ReadGraph graph) throws DatabaseException {\r
+        \r
+       Set<Resource> result = new HashSet<Resource>();\r
+       ModelingResources MOD = ModelingResources.getInstance(graph);\r
+       Layer0 L0 = Layer0.getInstance(graph);\r
+                       \r
+       for (Resource r : resources) {\r
+               if ( graph.isInstanceOf(r, MOD.Subscription_Item)) result.add(r);\r
+               else if ( graph.isInstanceOf(r, MOD.Subscription)) {\r
+                       for (Resource rr : graph.getObjects(r, L0.ConsistsOf)) {\r
+                       if ( graph.isInstanceOf(rr, MOD.Subscription_Item)) result.add(rr);                             \r
+                       }\r
+               }\r
+       }\r
+       \r
+       return result;\r
+        \r
+    }\r
+}\r