bundles/org.simantics.db.common/src/org/simantics/db/common/primitiverequest/PossibleResource.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.primitiverequest;\r
  13 \r
  14 import org.simantics.db.AsyncReadGraph;\r
  15 import org.simantics.db.Resource;\r
  16 import org.simantics.db.common.request.UnaryAsyncRead;\r
  17 import org.simantics.db.procedure.AsyncProcedure;\r
  18 \r
  19 final public class PossibleResource extends UnaryAsyncRead<String, Resource> {\r
  20 \r
  21     @Override\r
  22     public int getFlags() {\r
  23         return 0;\r
  24     }\r
  25 \r
  26     public PossibleResource(String URI) {\r
  27         super(URI);\r
  28         assert(URI != null);\r
  29     }\r
  30 \r
  31     @Override\r
  32     public void perform(AsyncReadGraph graph, final AsyncProcedure<Resource> procedure) {\r
  33         graph.forResource(parameter, new AsyncProcedure<Resource>() {\r
  34 \r
  35                         @Override\r
  36                         public void execute(AsyncReadGraph graph, Resource result) {\r
  37                                 procedure.execute(graph, result);\r
  38                         }\r
  39 \r
  40                         @Override\r
  41                         public void exception(AsyncReadGraph graph, Throwable throwable) {\r
  42                                 procedure.execute(graph, null);\r
  43                         }\r
  44                 \r
  45         });\r
  46     }\r
  47 \r
  48 }\r