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

   1 package org.simantics.db.layer0.variable;
   2
   3 import org.simantics.databoard.binding.Binding;
   4 import org.simantics.databoard.type.Datatype;
   5 import org.simantics.db.ReadGraph;
   6 import org.simantics.db.Resource;
   7 import org.simantics.db.exception.DatabaseException;
   8 import org.simantics.db.exception.NoSingleResultException;
   9 import org.simantics.db.layer0.exception.MissingVariableValueException;
  10 import org.simantics.db.layer0.exception.VariableException;
  11
  12 public class StandardGraphResourcePropertyVariable extends StandardGraphPropertyVariable {
  13
  14         public StandardGraphResourcePropertyVariable(ReadGraph graph, Variable parent, Resource parentResource, Resource property) throws DatabaseException {
  15             super(graph, parent, null, parentResource, property);
  16         }
  17
  18         @Override
  19         public <T> T getValue(ReadGraph graph) throws DatabaseException {
  20                 if (parentResource == null)
  21                         throw new VariableException("Variable is not represented by any resource (URI=" + getPossibleURI(graph) + ").");
  22                 try {
  23                 return (T)graph.getSingleObject(parentResource, property.predicate);
  24                 } catch (NoSingleResultException e) {
  25                         System.err.println("No object for " + parentResource + " " + property);
  26                         throw new MissingVariableValueException(getPossibleURI(graph));
  27                 }
  28         }
  29
  30         @Override
  31         public <T> T getValue(ReadGraph graph, Binding binding) throws DatabaseException {
  32                 if (parentResource == null)
  33                         throw new VariableException("Variable is not represented by any resource (URI=" + getPossibleURI(graph) + ").");
  34                 try {
  35             return (T)graph.getSingleObject(parentResource, property.predicate);
  36                 } catch (NoSingleResultException e) {
  37                         System.err.println("No object for " + parentResource + " " + property);
  38                         throw new MissingVariableValueException(getPossibleURI(graph));
  39                 }
  40         }
  41
  42         @Override
  43         public Datatype getDatatype(ReadGraph graph) throws DatabaseException {
  44             return null;
  45         }
  46
  47 }