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

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