X-Git-Url: https://gerrit.simantics.org/r/gitweb?a=blobdiff_plain;f=bundles%2Forg.simantics.objmap2%2Fsrc%2Forg%2Fsimantics%2Fobjmap%2Fgraph%2Frules%2Frange%2FFieldAccessor.java;fp=bundles%2Forg.simantics.objmap2%2Fsrc%2Forg%2Fsimantics%2Fobjmap%2Fgraph%2Frules%2Frange%2FFieldAccessor.java;h=4cd0f2e530f1bdd4769ab73ebafd999d66e6f498;hb=969bd23cab98a79ca9101af33334000879fb60c5;hp=0000000000000000000000000000000000000000;hpb=866dba5cd5a3929bbeae85991796acb212338a08;p=simantics%2Fplatform.git

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
index 000000000..4cd0f2e53
--- /dev/null
+++ b/bundles/org.simantics.objmap2/src/org/simantics/objmap/graph/rules/range/FieldAccessor.java
@@ -0,0 +1,76 @@
+/*******************************************************************************
+ * Copyright (c) 2007, 2013 Association for Decentralized Information Management
+ * in Industry THTH ry.
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License v1.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/epl-v10.html
+ *
+ * Contributors:
+ *     VTT Technical Research Centre of Finland - initial API and implementation
+ *******************************************************************************/
+package org.simantics.objmap.graph.rules.range;
+
+import java.lang.reflect.Field;
+
+import org.apache.log4j.Logger;
+import org.simantics.objmap.exceptions.MappingException;
+
+
+/**
+ * Accesses the given field of the element.
+ * @author Hannu Niemistö
+ */
+public class FieldAccessor<Range,T> implements IRangeAccessor<Range,T> {
+    
+    static Logger LOGGER = Logger.getLogger("org.simantics.objmap");
+    
+	Field field;
+
+	public FieldAccessor(Field field) {
+		this.field = field;
+	}
+
+	@Override
+	public T get(Range element) throws MappingException {
+		try {
+		    @SuppressWarnings("unchecked")
+			T result = (T)field.get(element);
+		    
+	        if(LOGGER.isInfoEnabled())
+	            LOGGER.info("        FieldAccessor.get " +
+	                    field.getName() + " -> " + result
+	            );
+	        
+			return result;
+		} catch (IllegalArgumentException e) {
+			throw new MappingException(e);
+		} catch (IllegalAccessException e) {
+			throw new MappingException(e);
+		}
+	}
+
+	@Override
+	public boolean set(Range element, T value) throws MappingException {
+		try {
+			Object currentValue = field.get(element);
+			
+            if(LOGGER.isInfoEnabled())
+                LOGGER.info("        FieldAccessor.set " +
+                        field.getName() + " " + currentValue +  
+                        " -> " + value
+                );
+			
+			if(value == null 
+			        ? (currentValue == null || field.getType().isPrimitive()) 
+			        : value.equals(currentValue))
+				return false;			
+			field.set(element, value);
+			return true;
+		} catch (IllegalArgumentException e) {
+			throw new MappingException(e);
+		} catch (IllegalAccessException e) {
+			throw new MappingException(e);
+		}
+	}	
+}