bundles/org.simantics.modeling/src/org/simantics/modeling/subscription/SubscriptionItemsQuery.java

   1 /*******************************************************************************\r
   2  * Copyright (c) 2007, 2011 Association for Decentralized Information Management in\r
   3  * Industry THTH ry.\r
   4  * All rights reserved. This program and the accompanying materials\r
   5  * are made available under the terms of the Eclipse Public License v1.0\r
   6  * which accompanies this distribution, and is available at\r
   7  * http://www.eclipse.org/legal/epl-v10.html\r
   8  *\r
   9  * Contributors:\r
  10  *     VTT Technical Research Centre of Finland - initial API and implementation\r
  11  *******************************************************************************/\r
  12 package org.simantics.modeling.subscription;\r
  13 \r
  14 import java.util.Collection;\r
  15 import java.util.HashSet;\r
  16 import java.util.Set;\r
  17 \r
  18 import org.simantics.db.ReadGraph;\r
  19 import org.simantics.db.Resource;\r
  20 import org.simantics.db.common.request.UniqueRead;\r
  21 import org.simantics.db.exception.DatabaseException;\r
  22 import org.simantics.layer0.Layer0;\r
  23 import org.simantics.modeling.ModelingResources;\r
  24 \r
  25 \r
  26 /**\r
  27  * This query returns all subscription items for a collection of subscriptions. \r
  28  */\r
  29 public class SubscriptionItemsQuery extends UniqueRead<Set<Resource>> {\r
  30 \r
  31         Collection<Resource> resources;\r
  32         \r
  33     public SubscriptionItemsQuery(Collection<Resource> resources) {\r
  34         super();\r
  35         this.resources = resources;\r
  36     }\r
  37 \r
  38     @Override\r
  39     public Set<Resource> perform(ReadGraph graph) throws DatabaseException {\r
  40         \r
  41         Set<Resource> result = new HashSet<Resource>();\r
  42         ModelingResources MOD = ModelingResources.getInstance(graph);\r
  43         Layer0 L0 = Layer0.getInstance(graph);\r
  44                         \r
  45         for (Resource r : resources) {\r
  46                 if ( graph.isInstanceOf(r, MOD.Subscription_Item)) result.add(r);\r
  47                 else if ( graph.isInstanceOf(r, MOD.Subscription)) {\r
  48                         for (Resource rr : graph.getObjects(r, L0.ConsistsOf)) {\r
  49                         if ( graph.isInstanceOf(rr, MOD.Subscription_Item)) result.add(rr);                             \r
  50                         }\r
  51                 }\r
  52         }\r
  53         \r
  54         return result;\r
  55         \r
  56     }\r
  57 }\r