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

   1 /*******************************************************************************
   2  * Copyright (c) 2007, 2010 Association for Decentralized Information Management
   3  * in Industry THTH ry.
   4  * All rights reserved. This program and the accompanying materials
   5  * are made available under the terms of the Eclipse Public License v1.0
   6  * which accompanies this distribution, and is available at
   7  * http://www.eclipse.org/legal/epl-v10.html
   8  *
   9  * Contributors:
  10  *     VTT Technical Research Centre of Finland - initial API and implementation
  11  *******************************************************************************/
  12 package org.simantics.db.layer0.request;
  13
  14 import java.util.Collection;
  15 import java.util.Map;
  16
  17 import org.simantics.db.Resource;
  18 import org.simantics.db.WriteGraph;
  19 import org.simantics.db.common.utils.CommonDBUtils;
  20 import org.simantics.db.exception.DatabaseException;
  21 import org.simantics.layer0.Layer0;
  22
  23 /**
  24  * Instantiates given type using templates attached to the type.
  25  * @author Hannu Niemistö
  26  */
  27 public class InstantiateRequest extends ApplyTemplatesRequest {
  28         Resource type;
  29
  30         public InstantiateRequest(Resource type, Map<String, Object> parameters,
  31                         Collection<Resource> contexts) {
  32                 super(parameters, contexts);
  33                 this.type = type;
  34         }
  35
  36         public InstantiateRequest(Resource type, Map<String, Object> parameters) {
  37                 super(parameters);
  38                 this.type = type;
  39         }
  40
  41         public InstantiateRequest(Resource type) {
  42                 super();
  43                 this.type = type;
  44         }
  45
  46         public Resource perform(WriteGraph g) throws DatabaseException {
  47         Layer0 b = Layer0.getInstance(g);
  48
  49         Resource parent = (Resource)parameters.get("parent");
  50         if(parent != null) CommonDBUtils.selectClusterSet(g, parent);
  51
  52                 // Default instantiation logic
  53                 Resource instance = g.newResource();
  54                 g.newClusterSet(instance);
  55                 g.claim(instance, b.InstanceOf, null, type);
  56
  57                 perform(g, instance);
  58
  59                 return instance;
  60         }
  61 }