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.slf4j.Logger;
  11 import org.slf4j.LoggerFactory;
  12
  13 public class StandardGraphResourcePropertyVariable extends StandardGraphPropertyVariable {
  14
  15     private static final Logger LOGGER = LoggerFactory.getLogger(StandardGraphResourcePropertyVariable.class);
  16
  17         public StandardGraphResourcePropertyVariable(ReadGraph graph, Variable parent, Resource parentResource, Resource property) throws DatabaseException {
  18             super(graph, parent, null, parentResource, property);
  19         }
  20
  21         @Override
  22         public <T> T getValue(ReadGraph graph) throws DatabaseException {
  23                 if (parentResource == null)
  24                         throw new MissingVariableValueException("Variable is not represented by any resource (URI=" + getPossibleURI(graph) + ").");
  25                 try {
  26                 return (T)graph.getSingleObject(parentResource, property.predicate);
  27                 } catch (NoSingleResultException e) {
  28                         LOGGER.error("No object for " + parentResource + " " + property);
  29                         throw new MissingVariableValueException(getPossibleURI(graph), e);
  30                 }
  31         }
  32
  33         @Override
  34         public <T> T getValue(ReadGraph graph, Binding binding) throws DatabaseException {
  35                 if (parentResource == null)
  36                         throw new MissingVariableValueException("Variable is not represented by any resource (URI=" + getPossibleURI(graph) + ").");
  37                 try {
  38             return (T)graph.getSingleObject(parentResource, property.predicate);
  39                 } catch (NoSingleResultException e) {
  40                         LOGGER.error("No object for " + parentResource + " " + property);
  41                         throw new MissingVariableValueException(getPossibleURI(graph), e);
  42                 }
  43         }
  44
  45         @Override
  46         public Datatype getDatatype(ReadGraph graph) throws DatabaseException {
  47             return null;
  48         }
  49
  50 }