bundles/org.simantics.spreadsheet.graph/src/org/simantics/spreadsheet/graph/CellValue.java

   1 package org.simantics.spreadsheet.graph;\r
   2 \r
   3 import org.simantics.databoard.Bindings;\r
   4 import org.simantics.databoard.binding.Binding;\r
   5 import org.simantics.databoard.binding.error.BindingConstructionException;\r
   6 import org.simantics.databoard.binding.mutable.Variant;\r
   7 import org.simantics.db.ReadGraph;\r
   8 import org.simantics.db.exception.DatabaseException;\r
   9 import org.simantics.db.layer0.request.VariableRead;\r
  10 import org.simantics.db.layer0.variable.Variable;\r
  11 import org.slf4j.Logger;\r
  12 import org.slf4j.LoggerFactory;\r
  13 \r
  14 public class CellValue extends VariableRead<Object> {\r
  15 \r
  16         private static final Logger LOGGER = LoggerFactory.getLogger(CellValue.class);\r
  17 \r
  18         public CellValue(Variable variable) {\r
  19                 super(variable);\r
  20         }\r
  21 \r
  22         @Override\r
  23         public Object perform(ReadGraph graph) throws DatabaseException {\r
  24                 \r
  25                 Object value = variable.getValue(graph);\r
  26                 String propertyName = variable.getName(graph);\r
  27                 \r
  28                 if("content".equals(propertyName)) {\r
  29                         if(value == null) {\r
  30                                 return Variant.ofInstance("Null content: " + variable.getURI(graph));\r
  31                         }\r
  32                         if(value instanceof Variable) {\r
  33                                 Variable var = (Variable)value;\r
  34                                 \r
  35                                 Object value2 = var.getValue(graph);\r
  36                                 if(value2 instanceof Variant) {\r
  37                                 return value;\r
  38                                 } else {\r
  39                                         if(value2 == null) return Variant.ofInstance("Null value from " + var.getURI(graph));\r
  40                                 try {\r
  41                                         Binding binding = Bindings.getBinding( value2.getClass() );\r
  42                                 return new Variant(binding, value2);\r
  43                                 } catch (BindingConstructionException e) {\r
  44                                         String msg = "Unsupported content " + value2 + " from " + var.getURI(graph);\r
  45                                         LOGGER.error(msg, e);\r
  46                                 return Variant.ofInstance(msg);\r
  47                                 }\r
  48                                 }\r
  49                         }\r
  50                         if(!(value instanceof Variant)) {\r
  51                                 try {\r
  52                                         Binding binding = Bindings.getBinding( value.getClass() );\r
  53                                 return new Variant(binding, value);\r
  54                                 } catch (BindingConstructionException e) {\r
  55                                         String msg = "Unsupported content " + value + " at " + variable.getURI(graph);\r
  56                                         LOGGER.error(msg, e);\r
  57                                         return Variant.ofInstance(msg);\r
  58                                 }\r
  59                         }\r
  60                 }\r
  61 \r
  62                 return value;\r
  63                 \r
  64         }\r
  65         \r
  66 }