Migrated source code from Simantics SVN

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

diff --git a/bundles/org.simantics.objmap2/src/org/simantics/objmap/graph/rules/range/FieldAccessor.java b/bundles/org.simantics.objmap2/src/org/simantics/objmap/graph/rules/range/FieldAccessor.java
new file mode 100644 (file)
index 0000000..4cd0f2e
--- /dev/null
+++ b/bundles/org.simantics.objmap2/src/org/simantics/objmap/graph/rules/range/FieldAccessor.java
@@ -0,0 +1,76 @@
+/*******************************************************************************\r
+ * Copyright (c) 2007, 2013 Association for Decentralized Information Management\r
+ * in 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.Field;\r
+\r
+import org.apache.log4j.Logger;\r
+import org.simantics.objmap.exceptions.MappingException;\r
+\r
+\r
+/**\r
+ * Accesses the given field of the element.\r
+ * @author Hannu Niemistö\r
+ */\r
+public class FieldAccessor<Range,T> implements IRangeAccessor<Range,T> {\r
+    \r
+    static Logger LOGGER = Logger.getLogger("org.simantics.objmap");\r
+    \r
+       Field field;\r
+\r
+       public FieldAccessor(Field field) {\r
+               this.field = field;\r
+       }\r
+\r
+       @Override\r
+       public T get(Range element) throws MappingException {\r
+               try {\r
+                   @SuppressWarnings("unchecked")\r
+                       T result = (T)field.get(element);\r
+                   \r
+               if(LOGGER.isInfoEnabled())\r
+                   LOGGER.info("        FieldAccessor.get " +\r
+                           field.getName() + " -> " + result\r
+                   );\r
+               \r
+                       return result;\r
+               } catch (IllegalArgumentException e) {\r
+                       throw new MappingException(e);\r
+               } catch (IllegalAccessException e) {\r
+                       throw new MappingException(e);\r
+               }\r
+       }\r
+\r
+       @Override\r
+       public boolean set(Range element, T value) throws MappingException {\r
+               try {\r
+                       Object currentValue = field.get(element);\r
+                       \r
+            if(LOGGER.isInfoEnabled())\r
+                LOGGER.info("        FieldAccessor.set " +\r
+                        field.getName() + " " + currentValue +  \r
+                        " -> " + value\r
+                );\r
+                       \r
+                       if(value == null \r
+                               ? (currentValue == null || field.getType().isPrimitive()) \r
+                               : value.equals(currentValue))\r
+                               return false;                   \r
+                       field.set(element, value);\r
+                       return true;\r
+               } catch (IllegalArgumentException e) {\r
+                       throw new MappingException(e);\r
+               } catch (IllegalAccessException e) {\r
+                       throw new MappingException(e);\r
+               }\r
+       }       \r
+}\r