bundles/org.simantics.objmap2/src/org/simantics/objmap/graph/annotations/factories/RelatedValueRuleFactory.java

   1 /*******************************************************************************
   2  * Copyright (c) 2007, 2013 Association for Decentralized Information Management
   3  * in Industry THTH ry.
   4  * All rights reserved. This program and the accompanying materials
   5  * are made available under the terms of the Eclipse Public License v1.0
   6  * which accompanies this distribution, and is available at
   7  * http://www.eclipse.org/legal/epl-v10.html
   8  *
   9  * Contributors:
  10  *     VTT Technical Research Centre of Finland - initial API and implementation
  11  *******************************************************************************/
  12 package org.simantics.objmap.graph.annotations.factories;
  13
  14 import java.lang.annotation.Annotation;
  15 import java.lang.reflect.Field;
  16
  17 import org.simantics.databoard.Bindings;
  18 import org.simantics.databoard.binding.Binding;
  19 import org.simantics.databoard.binding.error.BindingConstructionException;
  20 import org.simantics.databoard.binding.reflection.BindingRequest;
  21 import org.simantics.db.ReadGraph;
  22 import org.simantics.db.Resource;
  23 import org.simantics.db.exception.ResourceNotFoundException;
  24 import org.simantics.db.exception.ServiceException;
  25 import org.simantics.db.exception.ValidationException;
  26 import org.simantics.objmap.bidirectional.IBidirectionalMappingRule;
  27 import org.simantics.objmap.graph.annotations.RelatedValue;
  28 import org.simantics.objmap.graph.rules.ValueRule;
  29 import org.simantics.objmap.graph.rules.adapters.IdentityAdapter;
  30 import org.simantics.objmap.graph.rules.adapters.ValueAdapter;
  31 import org.simantics.objmap.graph.rules.domain.RelatedValueAccessor;
  32 import org.simantics.objmap.graph.rules.factory.IFieldRuleFactory;
  33 import org.simantics.objmap.graph.rules.range.AdaptedRangeAccessor;
  34 import org.simantics.objmap.graph.rules.range.FieldAccessor;
  35 import org.simantics.objmap.graph.rules.range.IRangeAccessor;
  36
  37
  38 public class RelatedValueRuleFactory<Range> implements IFieldRuleFactory<Resource, Range> {
  39
  40     @Override
  41     public IBidirectionalMappingRule<Resource, Range> create(ReadGraph g, Annotation _annotation, Field field) throws ResourceNotFoundException,
  42             ValidationException, ServiceException {
  43         RelatedValue annotation = (RelatedValue) _annotation;
  44         Class<? extends ValueAdapter> adapterClass = annotation.adapter();
  45         IRangeAccessor<Range,Object> rangeAccessor = new FieldAccessor<Range,Object>(field);
  46         Resource valueType;
  47         Binding valueBinding = null;
  48         if (adapterClass == IdentityAdapter.class) {
  49             try {
  50                 valueBinding = Bindings.getBinding(BindingRequest.create(field));
  51                 valueType = DataTypeUtils.dataTypeOfDatatype(g, valueBinding.type());
  52             } catch (BindingConstructionException e) {
  53                 return null;
  54             }
  55         } else {
  56             try {
  57                 ValueAdapter adapter = adapterClass.newInstance();
  58                 rangeAccessor = new AdaptedRangeAccessor<Range>(rangeAccessor, adapter);
  59                 valueType = adapter.rangeTypeToDomainType(g, field.getType());
  60             } catch (InstantiationException e) {
  61                 throw new RuntimeException(e);
  62             } catch (IllegalAccessException e) {
  63                 throw new RuntimeException(e);
  64             }
  65         }
  66         return new ValueRule<Resource,Range>(new RelatedValueAccessor(g.getResource(annotation.value()), valueType, valueBinding), rangeAccessor);
  67     }
  68
  69 }