bundles/org.simantics.databoard/src/org/simantics/databoard/binding/impl/BeanBinding.java

   1 /*******************************************************************************\r
   2  * Copyright (c) 2007, 2011 Association for Decentralized Information Management in\r
   3  * Industry THTH ry.\r
   4  * All rights reserved. This program and the accompanying materials\r
   5  * are made available under the terms of the Eclipse Public License v1.0\r
   6  * which accompanies this distribution, and is available at\r
   7  * http://www.eclipse.org/legal/epl-v10.html\r
   8  *\r
   9  * Contributors:\r
  10  *     VTT Technical Research Centre of Finland - initial API and implementation\r
  11  *******************************************************************************/\r
  12 package org.simantics.databoard.binding.impl;\r
  13 \r
  14 import java.util.Set;\r
  15 \r
  16 import org.simantics.databoard.adapter.AdaptException;\r
  17 import org.simantics.databoard.adapter.AdapterFactory;\r
  18 import org.simantics.databoard.binding.Binding;\r
  19 import org.simantics.databoard.binding.RecordBinding;\r
  20 import org.simantics.databoard.binding.VariantBinding;\r
  21 import org.simantics.databoard.binding.classfactory.TypeClassFactory;\r
  22 import org.simantics.databoard.binding.error.BindingConstructionException;\r
  23 import org.simantics.databoard.binding.error.BindingException;\r
  24 import org.simantics.databoard.binding.factory.BindingRepository;\r
  25 import org.simantics.databoard.binding.reflection.BindingRequest;\r
  26 import org.simantics.databoard.binding.reflection.ClassBindingFactory;\r
  27 import org.simantics.databoard.type.Datatype;\r
  28 import org.simantics.databoard.util.Bean;\r
  29 \r
  30 /**\r
  31  * Binds Bean-class (exact match) as Variant.\r
  32  *\r
  33  * @author Toni Kalajainen <toni.kalajainen@vtt.fi>\r
  34  */\r
  35 public class BeanBinding extends VariantBinding {\r
  36         \r
  37         ClassBindingFactory bindingFactory;\r
  38         AdapterFactory adapterFactory;\r
  39         TypeClassFactory typeClassFactory;\r
  40 \r
  41         public BeanBinding(ClassBindingFactory bindingFactory, TypeClassFactory typeClassFactory, AdapterFactory adapterFactory) {\r
  42                 this.bindingFactory = bindingFactory;\r
  43                 this.adapterFactory = adapterFactory;\r
  44                 this.typeClassFactory = typeClassFactory;\r
  45         }\r
  46 \r
  47         public ClassBindingFactory getBindingFactory() {\r
  48                 return bindingFactory;\r
  49         }\r
  50         \r
  51         public BindingRepository getRepository() {\r
  52                 return bindingFactory.getRepository();\r
  53         }\r
  54                 \r
  55         @Override\r
  56         public Object create(Binding srcBinding, Object value) throws BindingException {\r
  57 //              if (srcBinding instanceof RecordBinding == false) throw new BindingException("Cannot assign "+srcBinding.getClass()+" to bean.");\r
  58                 try {                   \r
  59                         BindingRequest request = typeClassFactory.getClass( srcBinding.type() );                        \r
  60                         Binding dstBinding = bindingFactory.getBinding( request );\r
  61                         return adapterFactory.adapt(value, srcBinding, dstBinding); \r
  62                 } catch (BindingConstructionException e) {\r
  63                         throw new BindingException(e);\r
  64                 } catch (AdaptException e) {\r
  65                         throw new BindingException(e);\r
  66                 }               \r
  67         }\r
  68 \r
  69         @Override\r
  70         public Binding getContentBinding(Object variant) throws BindingException {\r
  71                 Bean bean = (Bean) variant;\r
  72                 return bean.getBinding();\r
  73         }\r
  74 \r
  75         @Override\r
  76         public Datatype getContentType(Object variant) throws BindingException {\r
  77                 Bean bean = (Bean) variant;\r
  78                 return bean.getBinding().type();\r
  79         }\r
  80 \r
  81         @Override\r
  82         public Object getContent(Object variant, Binding binding)\r
  83         throws BindingException {\r
  84                 try {\r
  85                         if (binding instanceof RecordBinding == false) throw new BindingException("Cannot assign "+binding.getClass()+" to bean.");\r
  86                         RecordBinding dstBinding = (RecordBinding) binding;\r
  87                         Bean src = (Bean) variant;\r
  88                         RecordBinding srcBinding = (RecordBinding) src.getBinding(); \r
  89                         return adapterFactory.adapt(src, srcBinding, dstBinding);\r
  90                 } catch (AdaptException e) {\r
  91                         throw new BindingException( e );\r
  92                 }\r
  93         }\r
  94         \r
  95         @Override\r
  96         public Object getContent(Object variant)\r
  97         throws BindingException {\r
  98                 return variant;\r
  99         }       \r
 100 \r
 101         @Override\r
 102         public void setContent(Object variant, Binding binding, Object src)\r
 103         throws BindingException {\r
 104                 if (variant==src) return;\r
 105                 if (binding instanceof RecordBinding == false) throw new BindingException("Cannot assign "+binding.getClass()+" to bean.");\r
 106                 RecordBinding srcBinding = (RecordBinding) binding;\r
 107                 Bean dst = (Bean) variant;\r
 108                 RecordBinding dstBinding = (RecordBinding) dst.getBinding(); \r
 109                 dstBinding.readFrom(srcBinding, src, dst);\r
 110         }\r
 111 \r
 112         @Override\r
 113         public void assertInstaceIsValid(Object obj, Set<Object> validInstances) throws BindingException {\r
 114                 Bean bean = (Bean) obj;\r
 115                 bean.getBinding().assertInstaceIsValid(bean, validInstances);\r
 116         }\r
 117 \r
 118         @Override\r
 119         public boolean isInstance(Object obj) {\r
 120                 return obj instanceof Bean;\r
 121         }\r
 122         \r
 123         @Override\r
 124         public boolean isImmutable() {\r
 125                 return false;\r
 126         }\r
 127 \r
 128         @Override\r
 129         protected boolean baseEquals(Object obj) {\r
 130                 BeanBinding o = (BeanBinding)obj;\r
 131                 return super.baseEquals(obj) && o.adapterFactory == this.adapterFactory && o.bindingFactory == this.bindingFactory && o.typeClassFactory == this.typeClassFactory;\r
 132         }\r
 133         \r
 134         @Override\r
 135         public int baseHashCode() {\r
 136             return super.baseHashCode() + 7 * adapterFactory.hashCode() + 13 * bindingFactory.hashCode() + 17 * typeClassFactory.hashCode(); \r
 137         }\r
 138 }\r