bundles/org.simantics.diagram/src/org/simantics/diagram/symbolcontribution/SymbolProviderFactories.java

   1 package org.simantics.diagram.symbolcontribution;\r
   2 \r
   3 import org.eclipse.core.runtime.IStatus;\r
   4 import org.eclipse.core.runtime.Status;\r
   5 import org.simantics.db.ReadGraph;\r
   6 import org.simantics.db.Resource;\r
   7 import org.simantics.db.common.primitiverequest.PossibleAdapter;\r
   8 import org.simantics.db.common.procedure.adapter.TransientCacheAsyncListener;\r
   9 import org.simantics.db.exception.DatabaseException;\r
  10 import org.simantics.diagram.internal.Activator;\r
  11 import org.simantics.diagram.stubs.DiagramResource;\r
  12 \r
  13 /**\r
  14  * @author Tuukka Lehtonen\r
  15  */\r
  16 public class SymbolProviderFactories {\r
  17 \r
  18     public static boolean accept(ReadGraph graph, DiagramResource DIA, Resource contribution, Resource diagram) throws DatabaseException {\r
  19         String name = graph.getPossibleAdapter(contribution, String.class);\r
  20         if (name == null)\r
  21             return false;\r
  22         \r
  23         for (Resource filterR : graph.getObjects(contribution, DIA.HasSymbolContributionFilter)) {\r
  24             try {\r
  25                 SymbolContributionFilter filter = graph.syncRequest(\r
  26                         new PossibleAdapter<SymbolContributionFilter>(filterR, SymbolContributionFilter.class),\r
  27                         TransientCacheAsyncListener.<SymbolContributionFilter> instance());\r
  28                 if (filter == null || !filter.accept(graph, contribution, filterR, diagram)) {\r
  29                         return false;\r
  30                 }\r
  31             } catch (DatabaseException e) {\r
  32                 // If any errors happen when requesting for the filter, we can\r
  33                 // only assume that the graph related to their definitions is\r
  34                 // somehow corrupted. In this case we must assume that the filter\r
  35                 // did not pass since it did not work properly and true checking\r
  36                 // could not be performed to completion.\r
  37                 Activator.getDefault().getLog().log(new Status(IStatus.ERROR, Activator.PLUGIN_ID, "Filter " + filterR + " testing failed", e));\r
  38                 return false;\r
  39             }\r
  40         }\r
  41         return true;\r
  42     }\r
  43 \r
  44 }\r