bundles/org.simantics.structural2/src/org/simantics/structural2/queries/StructuralChildMapOfResource.java

   1 package org.simantics.structural2.queries;
   2
   3 import java.util.Map;
   4
   5 import org.simantics.db.ReadGraph;
   6 import org.simantics.db.Resource;
   7 import org.simantics.db.common.request.ResourceRead;
   8 import org.simantics.db.common.uri.UnescapedChildMapOfResource;
   9 import org.simantics.db.exception.DatabaseException;
  10 import org.simantics.structural.stubs.StructuralResource2;
  11
  12 public class StructuralChildMapOfResource extends ResourceRead<Map<String, Resource>> {
  13
  14     public StructuralChildMapOfResource(Resource resource) {
  15         super(resource);
  16     }
  17
  18     @Override
  19     public Map<String, Resource> perform(ReadGraph graph) throws DatabaseException {
  20         StructuralResource2 STR = StructuralResource2.getInstance(graph);
  21         Resource type = graph.getPossibleType(resource, STR.Component);
  22         if(type != null) {
  23             Resource definition = graph.getPossibleObject(type, STR.IsDefinedBy);
  24             if(definition != null) {
  25                 Map<String, Resource> map = graph.syncRequest(new UnescapedChildMapOfResource(definition));
  26                 if (!map.isEmpty())
  27                     return map;
  28             }
  29         }
  30         Map<String, Resource> directChildren = graph.syncRequest(new UnescapedChildMapOfResource(resource));
  31         return directChildren;
  32     }
  33
  34 }