bundles/org.simantics.db.common/src/org/simantics/db/common/uri/EscapedChildMapOfResource.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.uri;\r
  13 \r
  14 import java.util.Map;\r
  15 import java.util.concurrent.ConcurrentHashMap;\r
  16 \r
  17 import org.simantics.databoard.util.URIStringUtils;\r
  18 import org.simantics.db.AsyncReadGraph;\r
  19 import org.simantics.db.Resource;\r
  20 import org.simantics.db.common.ProcedureBarrier;\r
  21 import org.simantics.db.common.WriteBindings;\r
  22 import org.simantics.db.common.procedure.adapter.AsyncMultiProcedureAdapter;\r
  23 import org.simantics.db.common.request.ResourceAsyncRead;\r
  24 import org.simantics.db.procedure.AsyncProcedure;\r
  25 import org.simantics.layer0.Layer0;\r
  26 \r
  27 public class EscapedChildMapOfResource extends ResourceAsyncRead<Map<String, Resource>> {\r
  28 \r
  29         public EscapedChildMapOfResource(Resource resource) {\r
  30             super(resource);\r
  31         }\r
  32 \r
  33         @Override\r
  34         public void perform(AsyncReadGraph g, final AsyncProcedure<Map<String, Resource>> procedure) {\r
  35                 \r
  36                 final Layer0 L0 = g.getService(Layer0.class);\r
  37                 final ConcurrentHashMap<String, Resource> map = new ConcurrentHashMap<String, Resource>();\r
  38                 final ProcedureBarrier<Map<String, Resource>> barrier = new ProcedureBarrier<Map<String, Resource>>(1);\r
  39                 \r
  40                 g.forEachObject(resource, L0.ConsistsOf, new AsyncMultiProcedureAdapter<Resource>() {\r
  41 \r
  42                         @Override\r
  43                         public void execute(AsyncReadGraph g, final Resource child) {\r
  44                                 barrier.incrementAndGet();\r
  45 \r
  46                                 g.forPossibleRelatedValue(child, L0.HasName, WriteBindings.STRING, new AsyncProcedure<Object>() {\r
  47 \r
  48                                         @Override\r
  49                                         public void execute(AsyncReadGraph g, Object name) {\r
  50                                                 if (name != null) {\r
  51                                                         String escapedName = URIStringUtils.escape((String)name); \r
  52                                                         if (map.put(escapedName, child) != null)\r
  53                                                                 System.err.println(this + ": The database contains siblings with the same name " + escapedName + " (resource=" + resource.getResourceId() +").");\r
  54                                                 }\r
  55                                                 barrier.dec(g, procedure, map);\r
  56                                         }\r
  57                                         \r
  58                                         @Override\r
  59                                         public void exception(AsyncReadGraph graph, Throwable t) {\r
  60                                                 barrier.dec(graph, procedure, t);\r
  61                                         }\r
  62                                         \r
  63                                 });\r
  64                         }\r
  65                         \r
  66                         @Override\r
  67                         public void exception(AsyncReadGraph graph, Throwable t) {\r
  68                                 barrier.dec(graph, procedure, t);\r
  69                         }\r
  70                         \r
  71                         @Override\r
  72                         public void finished(AsyncReadGraph g) {\r
  73                                 barrier.dec(g, procedure, map);\r
  74                         }\r
  75                         \r
  76                 });\r
  77         }\r
  78         \r
  79 }\r