1 files changed, 79 insertions, 0 deletions
diff --git a/das-java/branches/das-java-M2/rdb/src/main/java/org/apache/tuscany/das/rdb/util/DataObjectUtil.java b/das-java/branches/das-java-M2/rdb/src/main/java/org/apache/tuscany/das/rdb/util/DataObjectUtil.java
new file mode 100644
index 0000000000..b9649669e5
--- /dev/null
+++ b/das-java/branches/das-java-M2/rdb/src/main/java/org/apache/tuscany/das/rdb/util/DataObjectUtil.java
@@ -0,0 +1,79 @@
+/*
+ * 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.das.rdb.util;
+
+import java.util.Iterator;
+import java.util.List;
+
+import commonj.sdo.ChangeSummary;
+import commonj.sdo.DataObject;
+import commonj.sdo.Property;
+import commonj.sdo.ChangeSummary.Setting;
+import commonj.sdo.helper.DataFactory;
+
+/**
+ */
+public final class DataObjectUtil {
+
+    private DataObjectUtil() {
+        
+    }
+    
+    // Utilities
+    public static DataObject getRestoredCopy(DataObject changedDO) {
+        DataObject changedCopy = getCopy(changedDO);
+        restoreAttributeValues(changedCopy, changedDO);
+        return changedCopy;
+    }
+
+    public static DataObject getCopy(DataObject original) {
+
+        DataObject copy = DataFactory.INSTANCE.create(original.getType());
+
+        // Fill in values
+        Iterator i = original.getType().getProperties().iterator();
+        while (i.hasNext()) {
+            Property feature = (Property) i.next();
+            copy.set(feature, original.get(feature));
+        }
+        return copy;
+    }
+
+    /**
+     * @param changedCopy
+     * @return
+     */
+    private static void restoreAttributeValues(DataObject changedCopy, DataObject changedDO) {
+
+        ChangeSummary changeSummary = changedDO.getDataGraph().getChangeSummary();
+        List changes = changeSummary.getOldValues(changedDO);
+        if (changes == null) {
+            return;
+        }
+
+        Iterator i = changes.iterator();
+        while (i.hasNext()) {
+            Setting s = (Setting) i.next();
+            if (s.getProperty().getType().isDataType()) {
+                changedCopy.set(s.getProperty(), s.getValue());
+            }
+        }
+    }
+
+}