bundles/org.simantics.db.layer0/src/org/simantics/db/layer0/request/IndexedInstances.java

   1 package org.simantics.db.layer0.request;\r
   2 \r
   3 import java.util.Collection;\r
   4 import java.util.Collections;\r
   5 import java.util.HashSet;\r
   6 import java.util.Map;\r
   7 import java.util.Set;\r
   8 \r
   9 import org.simantics.db.ReadGraph;\r
  10 import org.simantics.db.Resource;\r
  11 import org.simantics.db.common.request.ResourceRead2;\r
  12 import org.simantics.db.exception.DatabaseException;\r
  13 import org.simantics.layer0.Layer0;\r
  14 import org.simantics.operation.Layer0X;\r
  15 import org.simantics.scl.runtime.function.Function;\r
  16 \r
  17 public class IndexedInstances extends ResourceRead2<Set<Resource>> {\r
  18 \r
  19         public IndexedInstances(Resource type, Resource indexRoot) {\r
  20                 super(type, indexRoot);\r
  21         }\r
  22 \r
  23         @Override\r
  24         public Set<Resource> perform(ReadGraph graph) throws DatabaseException {\r
  25                 \r
  26         Layer0 L0 = Layer0.getInstance(graph);\r
  27         Layer0X L0X = Layer0X.getInstance(graph);\r
  28 \r
  29         String typeName = graph.getRelatedValue(resource, L0.HasName);\r
  30 \r
  31         Function dependencies = graph.adapt(L0X.Dependencies, Function.class);\r
  32         \r
  33         Collection<Map<String, Object>> results = (Collection<Map<String, Object>>)dependencies.apply(graph, resource2, "Types:*" + typeName);\r
  34         if (results == null)\r
  35             return Collections.emptySet();\r
  36 \r
  37         HashSet<Resource> result = new HashSet<Resource>(results.size());\r
  38         for(Map<String, Object> entry : results) {\r
  39             Resource res = (Resource)entry.get("Resource");\r
  40             if(res != null) {\r
  41                 if (graph.isInstanceOf(res, resource))\r
  42                         result.add(res);\r
  43             }\r
  44         }\r
  45         return result;\r
  46                 \r
  47         }\r
  48 \r
  49 }\r