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

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