bundles/org.simantics.db.layer0/src/org/simantics/db/layer0/migration/OrderedSetToListMigrationStep.java

   1 /*******************************************************************************\r
   2  * Copyright (c) 2012 Association for Decentralized Information Management in\r
   3  * 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.migration;\r
  13 \r
  14 import java.util.ArrayList;\r
  15 import java.util.Collection;\r
  16 \r
  17 import org.eclipse.core.runtime.IProgressMonitor;\r
  18 import org.simantics.databoard.Bindings;\r
  19 import org.simantics.db.ReadGraph;\r
  20 import org.simantics.db.Resource;\r
  21 import org.simantics.db.Session;\r
  22 import org.simantics.db.WriteGraph;\r
  23 import org.simantics.db.common.request.PossibleObjectWithType;\r
  24 import org.simantics.db.common.request.WriteRequest;\r
  25 import org.simantics.db.common.utils.ListUtils;\r
  26 import org.simantics.db.common.utils.OrderedSetUtils;\r
  27 import org.simantics.db.exception.DatabaseException;\r
  28 import org.simantics.db.layer0.adapter.Instances;\r
  29 import org.simantics.layer0.Layer0;\r
  30 \r
  31 public class OrderedSetToListMigrationStep implements MigrationStep {\r
  32     \r
  33     final ArrayList<OrderedSetToListMapping> rules;\r
  34     \r
  35     private class OrderedSetToListMapping {\r
  36         public Resource entityType, orderedSet, orderedSetRelation, list, listRelation;\r
  37     }\r
  38     \r
  39     public OrderedSetToListMigrationStep(ReadGraph graph, Resource step) throws DatabaseException {\r
  40         rules = new ArrayList<OrderedSetToListMapping>();\r
  41         Layer0 L0 = Layer0.getInstance(graph);\r
  42         for(Resource change : ListUtils.toList(graph, step)) {\r
  43             String entityType = graph.getPossibleRelatedValue(change, L0.OrderedSetToListMigrationStep_entityType, Bindings.STRING);\r
  44             String orderedSet = graph.getPossibleRelatedValue(change, L0.OrderedSetToListMigrationStep_orderedSetType, Bindings.STRING);\r
  45             String orderedSetRelation = graph.getPossibleRelatedValue(change, L0.OrderedSetToListMigrationStep_orderedSetRelation, Bindings.STRING);\r
  46             String list = graph.getPossibleRelatedValue(change, L0.OrderedSetToListMigrationStep_listType, Bindings.STRING);\r
  47             String listRelation = graph.getPossibleRelatedValue(change, L0.OrderedSetToListMigrationStep_listRelation, Bindings.STRING);\r
  48             \r
  49             if(orderedSet != null && orderedSetRelation != null && list != null && listRelation != null) {\r
  50                 OrderedSetToListMapping mapping = new OrderedSetToListMapping();\r
  51                 mapping.entityType = graph.getResource(entityType);\r
  52                 mapping.orderedSet = graph.getResource(orderedSet);\r
  53                 mapping.orderedSetRelation = graph.getResource(orderedSetRelation);\r
  54                 mapping.list = graph.getResource(list);\r
  55                 mapping.listRelation = graph.getResource(listRelation);\r
  56                 rules.add(mapping);\r
  57             }\r
  58         }\r
  59     }\r
  60 \r
  61     @Override\r
  62     public void applyTo(IProgressMonitor monitor, Session session, MigrationState state) throws DatabaseException {\r
  63         final Resource resource = MigrationUtils.getResource(monitor, session, state);\r
  64         \r
  65         if(resource != null) {\r
  66             session.syncRequest(new WriteRequest() {\r
  67                 \r
  68                 @Override\r
  69                 public void perform(WriteGraph graph) throws DatabaseException {\r
  70                     for(OrderedSetToListMapping mapping : rules) {\r
  71                         Instances entityFinder = graph.adapt(mapping.entityType, Instances.class);\r
  72                         for(Resource entity : entityFinder.find(graph, resource)) {\r
  73                             Resource orderedSet = graph.syncRequest(new PossibleObjectWithType(entity, mapping.orderedSetRelation, mapping.orderedSet));\r
  74                             if(orderedSet != null) {\r
  75                                 Collection<Resource> list = OrderedSetUtils.toList(graph, orderedSet);\r
  76                                 graph.deny(entity, mapping.orderedSetRelation, orderedSet);\r
  77                                 graph.claim(entity, mapping.listRelation, ListUtils.create(graph, mapping.list, list));\r
  78                             }\r
  79                         }\r
  80 \r
  81                     }                    \r
  82                 }\r
  83             });\r
  84         }\r
  85         \r
  86     }\r
  87 \r
  88 \r
  89 }\r