org.simantics.objmap2/src/org/simantics/objmap/graph/rules/range/CompoundGetSetValueAccessor.java

   1 package org.simantics.objmap.graph.rules.range;\r
   2 \r
   3 import java.lang.reflect.InvocationTargetException;\r
   4 import java.lang.reflect.Method;\r
   5 \r
   6 import org.simantics.objmap.exceptions.MappingException;\r
   7 \r
   8 \r
   9 /**\r
  10  * Accessor for mapped value. Uses two methods:\r
  11  * - Getter: returns the current value.\r
  12  * - Setter: sets the current value. The value may be null. (if setter parameter is primitive, null value is not mapped).\r
  13  * \r
  14  * @author Marko Luukkainen <marko.luukkainen@vtt.fi>\r
  15  *\r
  16  * @param <T>\r
  17  */\r
  18 public class CompoundGetSetValueAccessor<Range,T>  implements IRangeAccessor<Range,T> {\r
  19         \r
  20         private Method getter;\r
  21         private Method setter;\r
  22         private boolean primitive;\r
  23         \r
  24         public CompoundGetSetValueAccessor(Method getter, Method setter) {\r
  25                 this.getter = getter;\r
  26                 this.setter = setter;\r
  27                 this.primitive = setter.getParameterTypes()[0].isPrimitive();\r
  28         }\r
  29         \r
  30         @SuppressWarnings("unchecked")\r
  31         public T get(Range element) throws MappingException {\r
  32                 try {\r
  33                         return (T) getter.invoke(element);\r
  34                 } catch (IllegalArgumentException e) {\r
  35                         throw new MappingException(e);\r
  36                 } catch (IllegalAccessException e) {\r
  37                         throw new MappingException(e);\r
  38                 } catch (InvocationTargetException e) {\r
  39                         throw new MappingException(e);\r
  40                 }\r
  41         };\r
  42 \r
  43         @Override\r
  44         public boolean set(Range element, T value)\r
  45                         throws MappingException {\r
  46                 if (value == null && primitive)\r
  47                         return false;\r
  48                 if (equal(get(element),value))\r
  49                         return false;\r
  50                 try {\r
  51                         setter.invoke(element, value);\r
  52                 } catch (IllegalArgumentException e) {\r
  53                         throw new MappingException(e);\r
  54                 } catch (IllegalAccessException e) {\r
  55                         throw new MappingException(e);\r
  56                 } catch (InvocationTargetException e) {\r
  57                         throw new MappingException(e);\r
  58                 }\r
  59                 return true;\r
  60                 \r
  61         }\r
  62         \r
  63         private boolean equal(Object v1, Object v2) {\r
  64                 if (v1 == null) {\r
  65                         if (v2 == null)\r
  66                                 return true;\r
  67                         return false;\r
  68                 } else if (v2 == null) {\r
  69                         return false;\r
  70                 }\r
  71                 return v1.equals(v2);\r
  72         }\r
  73 }\r