bundles/org.simantics.db.common/src/org/simantics/db/common/request/DependentInstances3.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.common.request;\r
  13 \r
  14 import java.util.Set;\r
  15 \r
  16 import org.simantics.db.ReadGraph;\r
  17 import org.simantics.db.Resource;\r
  18 import org.simantics.db.Statement;\r
  19 import org.simantics.db.common.utils.NameUtils;\r
  20 import org.simantics.db.exception.DatabaseException;\r
  21 import org.simantics.db.service.CollectionSupport;\r
  22 import org.simantics.layer0.Layer0;\r
  23 import org.simantics.utils.Development;\r
  24 \r
  25 import gnu.trove.map.hash.THashMap;\r
  26 \r
  27 public class DependentInstances3 extends ResourceRead<ResourceSetGraph> {\r
  28 \r
  29     private static final boolean DEBUG = false;\r
  30 \r
  31     private static ThreadLocal<THashMap<DependentInstances3, ResourceSetGraph>> workArea = new ThreadLocal<THashMap<DependentInstances3, ResourceSetGraph>>() {\r
  32         protected gnu.trove.map.hash.THashMap<DependentInstances3,ResourceSetGraph> initialValue() {\r
  33             return new THashMap<>();\r
  34         }\r
  35     };\r
  36 \r
  37         public DependentInstances3(Resource resource) {\r
  38                 super(resource);\r
  39         }\r
  40 \r
  41         @Override\r
  42         public ResourceSetGraph perform(ReadGraph graph) throws DatabaseException {\r
  43                 \r
  44                 if(resource.equals(graph.getRootLibrary())) return new ResourceSetGraph(graph, resource);\r
  45         \r
  46                 if(Development.DEVELOPMENT)\r
  47                         if(graph.isImmutable(resource))\r
  48                                 System.err.println("Immutable resource in DependentInstances3: " + NameUtils.getSafeName(graph, resource, true));\r
  49                 \r
  50         // This is a loop\r
  51         THashMap<DependentInstances3, ResourceSetGraph> workingSet = workArea.get();\r
  52         ResourceSetGraph result = workingSet.get(this);\r
  53         if(result != null) return result;\r
  54 \r
  55         result = new ResourceSetGraph(graph, resource);\r
  56         \r
  57         workingSet.put(this, result);\r
  58         \r
  59         CollectionSupport cs = graph.getService(CollectionSupport.class);\r
  60         Set<Resource> objects = cs.createSet();\r
  61         \r
  62                 Layer0 L0 = Layer0.getInstance(graph);\r
  63                 for(Statement dep : graph.getStatements(resource, L0.IsDependencyOf)) {\r
  64                         if(graph.isSubrelationOf(dep.getPredicate(), L0.HasPrevious)) continue;\r
  65                         Resource object = dep.getObject();\r
  66                         if(graph.isImmutable(object)) continue;\r
  67                         objects.add(object);\r
  68                 }\r
  69                 \r
  70                 for(Resource object : objects ) {\r
  71             if(DEBUG)\r
  72                 System.err.println(NameUtils.getSafeName(graph, object, true) + " depends on " + NameUtils.getSafeName(graph, resource, true));\r
  73                     DependentInstances3 query = new DependentInstances3(object);\r
  74                     ResourceSetGraph instances = workingSet.get(query);\r
  75                     if(instances == null) instances = graph.syncRequest(query);\r
  76                         result.references.add(instances);\r
  77                 }\r
  78                 \r
  79                 workingSet.remove(this);\r
  80                 return result;\r
  81                 \r
  82         }\r
  83 \r
  84 }\r