bundles/org.simantics.modeling/src/org/simantics/modeling/utils/JoinMap.java

   1 package org.simantics.modeling.utils;\r
   2 \r
   3 import gnu.trove.map.hash.THashMap;\r
   4 \r
   5 import org.simantics.db.Resource;\r
   6 import org.simantics.db.WriteGraph;\r
   7 import org.simantics.db.exception.DatabaseException;\r
   8 import org.simantics.db.exception.RuntimeDatabaseException;\r
   9 import org.simantics.layer0.Layer0;\r
  10 import org.simantics.scl.runtime.SCLContext;\r
  11 import org.simantics.scl.runtime.function.FunctionImpl1;\r
  12 import org.simantics.structural.stubs.StructuralResource2;\r
  13 \r
  14 public class JoinMap extends FunctionImpl1<Object, Resource> {\r
  15 \r
  16     THashMap<Object,Resource> map = new THashMap<Object,Resource>(); \r
  17     \r
  18     @Override\r
  19     public Resource apply(Object key) {\r
  20         Resource join = map.get(key);\r
  21         if(join == null) {\r
  22             try {\r
  23                 WriteGraph g = (WriteGraph)SCLContext.getCurrent().get("graph");\r
  24                 Layer0 L0 = Layer0.getInstance(g);\r
  25                 StructuralResource2 STR = StructuralResource2.getInstance(g);\r
  26                 join = g.newResource();\r
  27                 g.claim(join, L0.InstanceOf, STR.ConnectionJoin);\r
  28                 map.put(key, join);\r
  29             } catch(DatabaseException e) {\r
  30                 throw new RuntimeDatabaseException(e);\r
  31             }\r
  32         }\r
  33         return join;\r
  34     }\r
  35 \r
  36 }\r