bundles/org.simantics.db.common/src/org/simantics/db/common/uri/EscapedChildMapOfResource.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.common.uri;
  13
  14 import java.util.Map;
  15 import java.util.concurrent.ConcurrentHashMap;
  16
  17 import org.simantics.databoard.util.URIStringUtils;
  18 import org.simantics.db.AsyncReadGraph;
  19 import org.simantics.db.Resource;
  20 import org.simantics.db.common.ProcedureBarrier;
  21 import org.simantics.db.common.WriteBindings;
  22 import org.simantics.db.common.procedure.adapter.AsyncMultiProcedureAdapter;
  23 import org.simantics.db.common.request.PropertyMapOfResource;
  24 import org.simantics.db.common.request.ResourceAsyncRead;
  25 import org.simantics.db.procedure.AsyncProcedure;
  26 import org.simantics.layer0.Layer0;
  27 import org.slf4j.Logger;
  28 import org.slf4j.LoggerFactory;
  29
  30 public class EscapedChildMapOfResource extends ResourceAsyncRead<Map<String, Resource>> {
  31
  32     private static final Logger LOGGER = LoggerFactory.getLogger(EscapedChildMapOfResource.class);
  33
  34         public EscapedChildMapOfResource(Resource resource) {
  35             super(resource);
  36         }
  37
  38         @Override
  39         public void perform(AsyncReadGraph g, final AsyncProcedure<Map<String, Resource>> procedure) {
  40
  41                 final Layer0 L0 = g.getService(Layer0.class);
  42                 final ConcurrentHashMap<String, Resource> map = new ConcurrentHashMap<String, Resource>();
  43                 final ProcedureBarrier<Map<String, Resource>> barrier = new ProcedureBarrier<Map<String, Resource>>(1);
  44
  45                 g.forEachObject(resource, L0.ConsistsOf, new AsyncMultiProcedureAdapter<Resource>() {
  46
  47                         @Override
  48                         public void execute(AsyncReadGraph g, final Resource child) {
  49                                 barrier.incrementAndGet();
  50
  51                                 g.forPossibleRelatedValue(child, L0.HasName, WriteBindings.STRING, new AsyncProcedure<Object>() {
  52
  53                                         @Override
  54                                         public void execute(AsyncReadGraph g, Object name) {
  55                                                 if (name != null) {
  56                                                         String escapedName = URIStringUtils.escape((String)name);
  57                                                         if (map.put(escapedName, child) != null)
  58                                                             LOGGER.error("The database contains siblings with the same name " + escapedName + " (resource=" + resource.getResourceId() +").");
  59                                                 }
  60                                                 barrier.dec(g, procedure, map);
  61                                         }
  62
  63                                         @Override
  64                                         public void exception(AsyncReadGraph graph, Throwable t) {
  65                                                 barrier.dec(graph, procedure, t);
  66                                         }
  67
  68                                 });
  69                         }
  70
  71                         @Override
  72                         public void exception(AsyncReadGraph graph, Throwable t) {
  73                                 barrier.dec(graph, procedure, t);
  74                         }
  75
  76                         @Override
  77                         public void finished(AsyncReadGraph g) {
  78                                 barrier.dec(g, procedure, map);
  79                         }
  80
  81                 });
  82         }
  83
  84 }