1 files changed, 96 insertions, 0 deletions
diff --git a/sdo-java/branches/emf-2.5/impl/src/main/java/org/apache/tuscany/sdo/helper/EqualityHelperImpl.java b/sdo-java/branches/emf-2.5/impl/src/main/java/org/apache/tuscany/sdo/helper/EqualityHelperImpl.java
new file mode 100644
index 0000000000..0d3d8ee5b7
--- /dev/null
+++ b/sdo-java/branches/emf-2.5/impl/src/main/java/org/apache/tuscany/sdo/helper/EqualityHelperImpl.java
@@ -0,0 +1,96 @@
+/**
+ *
+ *  Licensed to the Apache Software Foundation (ASF) under one
+ *  or more contributor license agreements.  See the NOTICE file
+ *  distributed with this work for additional information
+ *  regarding copyright ownership.  The ASF licenses this file
+ *  to you under the Apache License, Version 2.0 (the
+ *  "License"); you may not use this file except in compliance
+ *  with the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing,
+ *  software distributed under the License is distributed on an
+ *  "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ *  KIND, either express or implied.  See the License for the
+ *  specific language governing permissions and limitations
+ *  under the License.
+ */
+package org.apache.tuscany.sdo.helper;
+
+
+import org.eclipse.emf.ecore.EAttribute;
+import org.eclipse.emf.ecore.EObject;
+import org.eclipse.emf.ecore.EStructuralFeature;
+import org.eclipse.emf.ecore.util.EcoreUtil;
+
+import commonj.sdo.DataObject;
+import commonj.sdo.helper.EqualityHelper;
+
+
+/**
+ * A helper for comparing DataObjects.
+ */
+public class EqualityHelperImpl implements EqualityHelper
+{
+  public boolean equalShallow(DataObject dataObject1, DataObject dataObject2)
+  {
+    EcoreUtil.EqualityHelper equalityHelper = new EcoreUtil.EqualityHelper()
+      {
+        protected boolean haveEqualFeature(EObject eObject1, EObject eObject2, EStructuralFeature feature)
+        {
+          if (feature instanceof EAttribute)
+          {   
+              if(!("ChangeSummaryType".equals(feature.getEType().getName()) && "commonj.sdo".equals(feature.getEType().getEPackage().getNsURI()))) {
+                  boolean eIsSet = eObject1.eIsSet(feature);
+                  if (eIsSet != eObject2.eIsSet(feature) || !haveEqualAttribute(eObject1, eObject2, (EAttribute)feature))
+                  {
+                      return false;
+                  }
+              }
+          }
+          return true;
+        }
+
+        protected boolean equalFeatureMapValues(Object value1, Object value2, EStructuralFeature feature)
+        {
+          if (feature instanceof EAttribute)
+          {
+            return value1 == null ? value2 == null : value1.equals(value2);
+          }
+          return true;
+        }
+      };
+    return equalityHelper.equals((EObject)dataObject1, (EObject)dataObject2);
+  }
+
+  public boolean equal(DataObject dataObject1, DataObject dataObject2)
+  {
+      EcoreUtil.EqualityHelper equalityHelper = new EcoreUtil.EqualityHelper()
+      {
+        protected boolean haveEqualAttribute(EObject eObject1, EObject eObject2, EAttribute attribute) {
+            if(("ChangeSummaryType".equals(attribute.getEType().getName()) && "commonj.sdo".equals(attribute.getEType().getEPackage().getNsURI()))) {
+                throw new UnsupportedOperationException("This will be implemented when change summary serialzation/deserialization is in place"); 
+            } 
+            else if( "Bytes".equals(attribute.getEType().getName()) ) {
+                try
+                {
+                    byte [] value1 = (byte [])eObject1.eGet(attribute);
+                    byte [] value2 = (byte [])eObject2.eGet(attribute);
+                
+                    return( java.util.Arrays.equals(value1,value2) );
+                }
+                catch(Exception ex)
+                {
+                    // if any exception is thrown, assumption is they are not equal
+                    return false;
+                }
+            } 
+            else {
+                return super.haveEqualAttribute(eObject1, eObject2, attribute);
+            }
+        }
+      };
+    return equalityHelper.equals((EObject)dataObject1, (EObject)dataObject2);  }
+}