Migrated source code from Simantics SVN

[simantics/platform.git] / bundles / org.simantics.spreadsheet.graph / src / org / simantics / spreadsheet / graph / CellValue.java

diff --git a/bundles/org.simantics.spreadsheet.graph/src/org/simantics/spreadsheet/graph/CellValue.java b/bundles/org.simantics.spreadsheet.graph/src/org/simantics/spreadsheet/graph/CellValue.java
new file mode 100644 (file)
index 0000000..1236f8a
--- /dev/null
+++ b/bundles/org.simantics.spreadsheet.graph/src/org/simantics/spreadsheet/graph/CellValue.java
@@ -0,0 +1,61 @@
+package org.simantics.spreadsheet.graph;\r
+\r
+import org.simantics.databoard.Bindings;\r
+import org.simantics.databoard.binding.Binding;\r
+import org.simantics.databoard.binding.error.BindingConstructionException;\r
+import org.simantics.databoard.binding.mutable.Variant;\r
+import org.simantics.db.ReadGraph;\r
+import org.simantics.db.exception.DatabaseException;\r
+import org.simantics.db.layer0.request.VariableRead;\r
+import org.simantics.db.layer0.variable.Variable;\r
+import org.simantics.spreadsheet.common.logging.Logger;\r
+\r
+public class CellValue extends VariableRead<Object> {\r
+\r
+       public CellValue(Variable variable) {\r
+               super(variable);\r
+       }\r
+\r
+       @Override\r
+       public Object perform(ReadGraph graph) throws DatabaseException {\r
+               \r
+               Object value = variable.getValue(graph);\r
+               String propertyName = variable.getName(graph);\r
+               \r
+               if("content".equals(propertyName)) {\r
+                       if(value == null) {\r
+                               return Variant.ofInstance("Null content: " + variable.getURI(graph));\r
+                       }\r
+                       if(value instanceof Variable) {\r
+                               Variable var = (Variable)value;\r
+                               \r
+                               Object value2 = var.getValue(graph);\r
+                               if(value2 instanceof Variant) {\r
+                               return value;\r
+                               } else {\r
+                                       if(value2 == null) return Variant.ofInstance("Null value from " + var.getURI(graph));\r
+                               try {\r
+                                       Binding binding = Bindings.getBinding( value2.getClass() );\r
+                               return new Variant(binding, value2);\r
+                               } catch (BindingConstructionException e) {\r
+                                       Logger.defaultLogError(e);\r
+                               return Variant.ofInstance("Unsupported content " + value2 + " from " + var.getURI(graph));\r
+                               }\r
+                               }\r
+                       }\r
+                       if(!(value instanceof Variant)) {\r
+                               try {\r
+                                       Binding binding = Bindings.getBinding( value.getClass() );\r
+                               return new Variant(binding, value);\r
+                               } catch (BindingConstructionException e) {\r
+                                       Logger.defaultLogError(e);\r
+                                       return Variant.ofInstance("Unsupported content " + value + " at " + variable.getURI(graph));\r
+                               }\r
+                       }\r
+               }\r
+\r
+               return value;\r
+               \r
+       }\r
+       \r
+}
\ No newline at end of file