Migrated source code from Simantics SVN

[simantics/platform.git] / bundles / org.simantics.objmap2 / src / org / simantics / objmap / graph / rules / range / GetSetValueAccessor.java

diff --git a/bundles/org.simantics.objmap2/src/org/simantics/objmap/graph/rules/range/GetSetValueAccessor.java b/bundles/org.simantics.objmap2/src/org/simantics/objmap/graph/rules/range/GetSetValueAccessor.java
new file mode 100644 (file)
index 0000000..6100c96
--- /dev/null
+++ b/bundles/org.simantics.objmap2/src/org/simantics/objmap/graph/rules/range/GetSetValueAccessor.java
@@ -0,0 +1,84 @@
+/*******************************************************************************\r
+ * Copyright (c) 2012, 2013 Association for Decentralized Information Management in\r
+ * Industry THTH ry.\r
+ * All rights reserved. This program and the accompanying materials\r
+ * are made available under the terms of the Eclipse Public License v1.0\r
+ * which accompanies this distribution, and is available at\r
+ * http://www.eclipse.org/legal/epl-v10.html\r
+ *\r
+ * Contributors:\r
+ *     VTT Technical Research Centre of Finland - initial API and implementation\r
+ *******************************************************************************/\r
+package org.simantics.objmap.graph.rules.range;\r
+\r
+import java.lang.reflect.InvocationTargetException;\r
+import java.lang.reflect.Method;\r
+\r
+import org.simantics.objmap.exceptions.MappingException;\r
+\r
+\r
+/**\r
+ * Accessor for mapped value. Uses two methods:\r
+ * - Getter: returns the current value.\r
+ * - Setter: sets the current value. The value may be null. (if setter parameter is primitive, null value is not mapped).\r
+ * \r
+ * @author Marko Luukkainen <marko.luukkainen@vtt.fi>\r
+ *\r
+ * @param <T>\r
+ */\r
+public class GetSetValueAccessor<Range,T>  implements IRangeAccessor<Range,T> {\r
+       \r
+       private Method getter;\r
+       private Method setter;\r
+       private boolean primitive;\r
+       \r
+       public GetSetValueAccessor(Method getter, Method setter) {\r
+               this.getter = getter;\r
+               this.setter = setter;\r
+               this.primitive = setter.getParameterTypes()[0].isPrimitive();\r
+       }\r
+       \r
+       @SuppressWarnings("unchecked")\r
+       public T get(Range element) throws MappingException {\r
+               try {\r
+                       return (T) getter.invoke(element);\r
+               } catch (IllegalArgumentException e) {\r
+                       throw new MappingException(e);\r
+               } catch (IllegalAccessException e) {\r
+                       throw new MappingException(e);\r
+               } catch (InvocationTargetException e) {\r
+                       throw new MappingException(e);\r
+               }\r
+       };\r
+\r
+       @Override\r
+       public boolean set(Range element, T value)\r
+                       throws MappingException {\r
+               if (value == null && primitive)\r
+                       return false;\r
+               if (equal(get(element),value))\r
+                       return false;\r
+               try {\r
+                       setter.invoke(element, value);\r
+               } catch (IllegalArgumentException e) {\r
+                       throw new MappingException(e);\r
+               } catch (IllegalAccessException e) {\r
+                       throw new MappingException(e);\r
+               } catch (InvocationTargetException e) {\r
+                       throw new MappingException(e);\r
+               }\r
+               return true;\r
+               \r
+       }\r
+       \r
+       private boolean equal(Object v1, Object v2) {\r
+               if (v1 == null) {\r
+                       if (v2 == null)\r
+                               return true;\r
+                       return false;\r
+               } else if (v2 == null) {\r
+                       return false;\r
+               }\r
+               return v1.equals(v2);\r
+       }\r
+}\r