Migrated source code from Simantics SVN

[simantics/platform.git] / bundles / org.simantics.db.layer0 / src / org / simantics / db / layer0 / variable / ValueAccessorWithBinding.java

diff --git a/bundles/org.simantics.db.layer0/src/org/simantics/db/layer0/variable/ValueAccessorWithBinding.java b/bundles/org.simantics.db.layer0/src/org/simantics/db/layer0/variable/ValueAccessorWithBinding.java
new file mode 100644 (file)
index 0000000..ece82e2
--- /dev/null
+++ b/bundles/org.simantics.db.layer0/src/org/simantics/db/layer0/variable/ValueAccessorWithBinding.java
@@ -0,0 +1,42 @@
+package org.simantics.db.layer0.variable;\r
+\r
+import org.simantics.databoard.Bindings;\r
+import org.simantics.databoard.adapter.AdaptException;\r
+import org.simantics.databoard.binding.Binding;\r
+import org.simantics.databoard.type.Datatype;\r
+import org.simantics.db.ReadGraph;\r
+import org.simantics.db.WriteGraph;\r
+import org.simantics.db.exception.DatabaseException;\r
+\r
+/**\r
+ * A default implementation of value accessor that has fixed binding.\r
+ */\r
+public abstract class ValueAccessorWithBinding implements ValueAccessor {\r
+\r
+       public abstract Binding getBinding();\r
+       \r
+       @Override\r
+       public Object getValue(ReadGraph graph, Variable context, Binding binding)\r
+                       throws DatabaseException {\r
+               try {\r
+                       return Bindings.adapt(getValue(graph, context), getBinding(), binding);\r
+               } catch (AdaptException e) {\r
+                       throw new DatabaseException(e);\r
+               }\r
+       }\r
+\r
+       @Override\r
+       public void setValue(WriteGraph graph, Variable context, Object value,\r
+                       Binding binding) throws DatabaseException {\r
+               try {\r
+                       setValue(graph, context, Bindings.adapt(value, binding, getBinding()));\r
+               } catch (AdaptException e) {\r
+                       throw new DatabaseException(e);\r
+               }\r
+       }\r
+       \r
+       @Override\r
+       public Datatype getDatatype(ReadGraph graph, Variable context) throws DatabaseException {\r
+               return getBinding().type();\r
+       }\r
+}\r