bundles/org.simantics.db.layer0/src/org/simantics/db/layer0/request/DefaultInstanceFactoryRequest.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.HashMap;\r
  15 import java.util.HashSet;\r
  16 import java.util.Map;\r
  17 \r
  18 import org.simantics.db.Resource;\r
  19 import org.simantics.db.VirtualGraph;\r
  20 import org.simantics.db.WriteGraph;\r
  21 import org.simantics.db.exception.DatabaseException;\r
  22 import org.simantics.db.layer0.adapter.Template;\r
  23 import org.simantics.db.request.UndoTraits;\r
  24 import org.simantics.db.request.WriteResult;\r
  25 import org.simantics.layer0.Layer0;\r
  26 \r
  27 public class DefaultInstanceFactoryRequest implements WriteResult<Map<String, Object>> {\r
  28         \r
  29         Resource type;\r
  30         HashMap<String, Object> parameters;\r
  31         Resource[] contexts;\r
  32         \r
  33         public DefaultInstanceFactoryRequest(Resource type, Map<String, Object> parameters,\r
  34                         Resource ... contexts) {\r
  35                 this.parameters = new HashMap<String, Object>(parameters);\r
  36                 this.contexts = contexts;\r
  37                 this.type = type;\r
  38         }\r
  39         \r
  40         public Map<String, Object> perform(WriteGraph g) throws DatabaseException {\r
  41 \r
  42         Layer0 b = Layer0.getInstance(g);\r
  43                 \r
  44                 // Default instantiation logic\r
  45                 Resource instance = g.newResource();\r
  46                 g.claim(instance, b.InstanceOf, null, type);\r
  47 \r
  48                 parameters.put("", instance);\r
  49 \r
  50                 // Collect templates\r
  51                 HashSet<Resource> templates = new HashSet<Resource>();\r
  52                 for(Resource context : contexts)\r
  53                         templates.addAll(g.getObjects(instance, context));\r
  54 \r
  55                 // Apply templates\r
  56                 for(Resource template : templates)\r
  57                         g.adapt(template, Template.class).apply(g, parameters);\r
  58 \r
  59                 return parameters;\r
  60                 \r
  61         }\r
  62 \r
  63         @Override\r
  64         public UndoTraits getUndoTraits() {\r
  65                 return null;\r
  66         }\r
  67 \r
  68         @Override\r
  69         public VirtualGraph getProvider() {\r
  70                 return null;\r
  71         }\r
  72 }\r