bundles/org.simantics.db.common/src/org/simantics/db/common/request/AdaptValue.java

   1 package org.simantics.db.common.request;\r
   2 \r
   3 import org.simantics.db.ReadGraph;\r
   4 import org.simantics.db.Resource;\r
   5 import org.simantics.db.common.utils.Functions;\r
   6 import org.simantics.db.exception.DatabaseException;\r
   7 import org.simantics.db.exception.RuntimeDatabaseException;\r
   8 import org.simantics.layer0.Layer0;\r
   9 import org.simantics.scl.reflection.ReflectionUtils;\r
  10 import org.simantics.scl.reflection.ValueNotFoundException;\r
  11 import org.simantics.scl.runtime.function.FunctionImpl3;\r
  12 \r
  13 /**\r
  14  * Adapts a resource to (SCL) value.\r
  15  * @author Hannu Niemist&ouml;\r
  16  */\r
  17 public class AdaptValue extends ResourceRead<Object> {\r
  18     \r
  19     public AdaptValue(Resource resource) {\r
  20         super(resource);\r
  21     }\r
  22 \r
  23     private static final FunctionImpl3<ReadGraph,Resource,Object,Object> functionApplication = new FunctionImpl3<ReadGraph,Resource,Object,Object>() {\r
  24 \r
  25                 @Override\r
  26                 public Object apply(ReadGraph graph, Resource resource, Object context) {\r
  27                         try {\r
  28                                 return Functions.exec(graph, resource, graph, resource, context);\r
  29                         } catch (DatabaseException e) {\r
  30                                 throw new RuntimeDatabaseException(e);\r
  31                         }\r
  32                 }\r
  33 \r
  34         };\r
  35     \r
  36     @Override\r
  37     public Object perform(ReadGraph graph) throws DatabaseException {\r
  38         String uri = graph.getURI(resource);        \r
  39         try {\r
  40                         if(Layer0.URIs.Functions_functionApplication.equals(uri)) return functionApplication;\r
  41             return ReflectionUtils.getValue(uri).getValue();\r
  42         } catch (ValueNotFoundException e) {\r
  43             throw new DatabaseException("Couldn't adapt the value " + uri, e);\r
  44         }\r
  45     }\r
  46 \r
  47 }\r