bundles/org.simantics.db.layer0/src/org/simantics/db/layer0/variable/ValueAccessorWithBinding.java

   1 package org.simantics.db.layer0.variable;\r
   2 \r
   3 import org.simantics.databoard.Bindings;\r
   4 import org.simantics.databoard.adapter.AdaptException;\r
   5 import org.simantics.databoard.binding.Binding;\r
   6 import org.simantics.databoard.type.Datatype;\r
   7 import org.simantics.db.ReadGraph;\r
   8 import org.simantics.db.WriteGraph;\r
   9 import org.simantics.db.exception.DatabaseException;\r
  10 \r
  11 /**\r
  12  * A default implementation of value accessor that has fixed binding.\r
  13  */\r
  14 public abstract class ValueAccessorWithBinding implements ValueAccessor {\r
  15 \r
  16         public abstract Binding getBinding();\r
  17         \r
  18         @Override\r
  19         public Object getValue(ReadGraph graph, Variable context, Binding binding)\r
  20                         throws DatabaseException {\r
  21                 try {\r
  22                         return Bindings.adapt(getValue(graph, context), getBinding(), binding);\r
  23                 } catch (AdaptException e) {\r
  24                         throw new DatabaseException(e);\r
  25                 }\r
  26         }\r
  27 \r
  28         @Override\r
  29         public void setValue(WriteGraph graph, Variable context, Object value,\r
  30                         Binding binding) throws DatabaseException {\r
  31                 try {\r
  32                         setValue(graph, context, Bindings.adapt(value, binding, getBinding()));\r
  33                 } catch (AdaptException e) {\r
  34                         throw new DatabaseException(e);\r
  35                 }\r
  36         }\r
  37         \r
  38         @Override\r
  39         public Datatype getDatatype(ReadGraph graph, Variable context) throws DatabaseException {\r
  40                 return getBinding().type();\r
  41         }\r
  42 }\r