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