bundles/org.simantics.db.layer0/src/org/simantics/db/layer0/request/InstantiateRequest.java

   1 /*******************************************************************************\r
   2  * Copyright (c) 2007, 2010 Association for Decentralized Information Management\r
   3  * in 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.db.layer0.request;\r
  13 \r
  14 import java.util.Collection;\r
  15 import java.util.Map;\r
  16 \r
  17 import org.simantics.db.Resource;\r
  18 import org.simantics.db.WriteGraph;\r
  19 import org.simantics.db.common.utils.CommonDBUtils;\r
  20 import org.simantics.db.exception.DatabaseException;\r
  21 import org.simantics.layer0.Layer0;\r
  22 \r
  23 /**\r
  24  * Instantiates given type using templates attached to the type.\r
  25  * @author Hannu Niemistö\r
  26  */\r
  27 public class InstantiateRequest extends ApplyTemplatesRequest {\r
  28         Resource type;\r
  29         \r
  30         public InstantiateRequest(Resource type, Map<String, Object> parameters,\r
  31                         Collection<Resource> contexts) {\r
  32                 super(parameters, contexts);\r
  33                 this.type = type;\r
  34         }\r
  35         \r
  36         public InstantiateRequest(Resource type, Map<String, Object> parameters) {\r
  37                 super(parameters);\r
  38                 this.type = type;\r
  39         }\r
  40         \r
  41         public InstantiateRequest(Resource type) {\r
  42                 super();\r
  43                 this.type = type;\r
  44         }\r
  45 \r
  46         public Resource perform(WriteGraph g) throws DatabaseException {\r
  47         Layer0 b = Layer0.getInstance(g);\r
  48         \r
  49         Resource parent = (Resource)parameters.get("parent");\r
  50         if(parent != null) CommonDBUtils.selectClusterSet(g, parent);\r
  51         \r
  52                 // Default instantiation logic\r
  53                 Resource instance = g.newResource();\r
  54                 g.newClusterSet(instance);\r
  55                 g.claim(instance, b.InstanceOf, null, type);\r
  56                 \r
  57                 perform(g, instance);\r
  58                 \r
  59                 return instance;\r
  60         }\r
  61 }\r