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diff --git a/das-java/trunk/rdb/src/test/java/org/apache/tuscany/das/rdb/test/PartialUpdateTests.java b/das-java/trunk/rdb/src/test/java/org/apache/tuscany/das/rdb/test/PartialUpdateTests.java
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+++ b/das-java/trunk/rdb/src/test/java/org/apache/tuscany/das/rdb/test/PartialUpdateTests.java
@@ -0,0 +1,267 @@
+/*
+ * 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.test;
+
+import java.sql.SQLException;
+
+import org.apache.tuscany.das.rdb.Command;
+import org.apache.tuscany.das.rdb.DAS;
+import org.apache.tuscany.das.rdb.test.data.CustomerData;
+import org.apache.tuscany.das.rdb.test.framework.DasTest;
+
+import commonj.sdo.DataObject;
+
+public class PartialUpdateTests extends DasTest {
+
+    public PartialUpdateTests() {
+        super();
+    }
+
+    protected void setUp() throws Exception {
+        super.setUp();
+        new CustomerData(getAutoConnection()).refresh();
+    }
+
+    protected void tearDown() throws Exception {
+        super.tearDown();
+    }
+
+    /**
+     * Update with one changed property
+     */
+    public void testPartialUpdateSingleProperty() throws SQLException {
+        DAS das = DAS.FACTORY.createDAS(getConnection());
+        Command readCustomers = das.createCommand("select * from CUSTOMER where ID = 1");
+
+        // Read
+        DataObject root = readCustomers.executeQuery();
+
+        DataObject customer = root.getDataObject("CUSTOMER[1]");
+        // Verify
+        assertEquals(1, customer.getInt("ID"));
+
+        Command update = das.createCommand("update CUSTOMER set LASTNAME = 'modified' where ID = 1");
+        update.execute();
+
+        customer.setString("ADDRESS", "main street");
+
+        das.applyChanges(root);
+
+        root = readCustomers.executeQuery();
+
+        // If partial update was not used, LASTNAME would not be 'modified'
+        customer = root.getDataObject("CUSTOMER[1]");
+        assertEquals(1, customer.getInt("ID"));
+        assertEquals("modified", customer.getString("LASTNAME"));
+        assertEquals("main street", customer.getString("ADDRESS"));
+    }
+
+    /**
+     * Update with all changed properties
+     */
+    public void testPartialUpdateAllProperties() throws SQLException {
+        DAS das = DAS.FACTORY.createDAS(getConnection());
+        Command readCustomers = das.createCommand("select * from CUSTOMER where ID = 1");
+
+        // Read
+        DataObject root = readCustomers.executeQuery();
+
+        DataObject customer = root.getDataObject("CUSTOMER[1]");
+        // Verify
+        assertEquals(1, customer.getInt("ID"));
+
+        customer.setString("LASTNAME", "lastname modified");
+        customer.setString("ADDRESS", "address modified");
+        
+        das.applyChanges(root);
+
+        root = readCustomers.executeQuery();
+
+        // If partial update was not used, LASTNAME would not be 'modified'
+        customer = root.getDataObject("CUSTOMER[1]");
+        assertEquals(1, customer.getInt("ID"));
+        assertEquals("lastname modified", customer.getString("LASTNAME"));
+        assertEquals("address modified", customer.getString("ADDRESS"));
+    }    
+    
+    /**
+     * Insert with no changed properties and no generated ID
+     * Read graph.  Add new DO and apply without seting any attributes.
+     * 
+     */
+//    public void testPartialReadInsertApply() throws Exception {
+//
+//        DAS das = DAS.FACTORY.createDAS(getConnection());
+//        // Read some customers
+//        Command select = das.createCommand("Select * from CUSTOMER");
+//        DataObject root = select.executeQuery();
+//        
+//        //Remember count
+//        int count = root.getList("CUSTOMER").size();
+//
+//        // Create a new customer
+//        root.createDataObject("CUSTOMER");
+//
+//        // Build apply changes command
+//        das.applyChanges(root);
+//
+//        // verify insert
+//        root = select.executeQuery();
+//        assertEquals(count + 1, root.getList("CUSTOMER").size());
+//
+//    }
+
+    /**
+     * Insert with no changed properties to row with generated ID
+     * Read graph.  Add new DO and apply without seting any attributes. 
+     */
+    public void testPartialInsertWithGeneratedID() throws Exception {
+
+        DAS das = DAS.FACTORY.createDAS(getConfig("CompanyConfig.xml"),getConnection());
+        // Read some companies
+        Command select = das.createCommand("Select * from COMPANY");
+        DataObject root = select.executeQuery();
+        
+        //Remember count
+        int count = root.getList("COMPANY").size();
+
+        // Create a new company
+        root.createDataObject("COMPANY");
+
+        // Build apply changes command
+        das.applyChanges(root);
+
+        // verify insert
+        root = select.executeQuery();
+        assertEquals(count + 1, root.getList("COMPANY").size());
+
+    }
+    
+    /**
+     * Insert with 1 changed property that is not the ID
+     * @throws SQLException
+     */
+    public void testPartialInsertWithSinglePropertyChange() throws Exception {
+
+        DAS das = DAS.FACTORY.createDAS(getConfig("CompanyConfig.xml"),getConnection());
+        // Read some company
+        Command select = das.createCommand("Select * from COMPANY");
+        DataObject root = select.executeQuery();
+        
+        //Remember count
+        int count = root.getList("COMPANY").size();
+
+        // Create a new company
+        DataObject company = root.createDataObject("COMPANY");
+        company.setString("NAME", "New company name");
+        
+        // Build apply changes command
+        das.applyChanges(root);
+
+        // verify insert
+        root = select.executeQuery();
+        assertEquals(count + 1, root.getList("COMPANY").size());
+    }
+
+    /**
+     * Insert with 1 changed property that is the ID
+     * @throws SQLException
+     */
+    public void testPartialInsertWithIdChange() throws SQLException {
+        DAS das = DAS.FACTORY.createDAS(getConnection());
+        Command readCustomers = das.createCommand("select * from CUSTOMER");
+
+        // Read
+        DataObject root = readCustomers.executeQuery();
+
+        // Create a new customer
+        DataObject newCust = root.createDataObject("CUSTOMER");
+        newCust.set("ID", new Integer(200));
+        // Purposely do not set lastname to let it default to 'Garfugengheist'
+        // newCust.set("LASTNAME", "Gerkin" );
+
+        das.applyChanges(root);
+
+        Command readNewCust = das.createCommand("select * from CUSTOMER where ID = 200");
+        root = readNewCust.executeQuery();
+
+        // If partial insert was not used, LASTNAME would not be
+        // 'Garfugengheist'
+        newCust = root.getDataObject("CUSTOMER[1]");
+        assertEquals(200, newCust.getInt("ID"));
+        assertEquals("Garfugengheist", newCust.getString("LASTNAME"));
+        assertNull(newCust.getString("ADDRESS"));
+
+    }
+    
+    public void testPartialInsertWithAllPropertyChange() throws SQLException {
+        DAS das = DAS.FACTORY.createDAS(getConnection());
+        Command readCustomers = das.createCommand("select * from CUSTOMER");
+
+        // Read
+        DataObject root = readCustomers.executeQuery();
+
+        // Create a new customer
+        DataObject newCust = root.createDataObject("CUSTOMER");
+        newCust.set("ID", new Integer(300));
+        newCust.set("ADDRESS", "5528 Wells Fargo Drive");
+        newCust.set("LASTNAME", "Gerkin" );
+
+        das.applyChanges(root);
+
+        Command readNewCust = das.createCommand("select * from CUSTOMER where ID = 300");
+        root = readNewCust.executeQuery();
+
+        newCust = root.getDataObject("CUSTOMER[1]");
+        assertEquals(300, newCust.getInt("ID"));
+        assertEquals("Gerkin", newCust.getString("LASTNAME"));
+        assertEquals("5528 Wells Fargo Drive", newCust.getString("ADDRESS"));
+
+    }
+    
+    public void testPartialInsert() throws SQLException {
+        DAS das = DAS.FACTORY.createDAS(getConnection());
+        Command readCustomers = das.createCommand("select * from CUSTOMER");
+
+        // Read
+        DataObject root = readCustomers.executeQuery();
+
+        // Create a new customer
+        DataObject newCust = root.createDataObject("CUSTOMER");
+        newCust.set("ID", new Integer(100));
+        newCust.set("ADDRESS", "5528 Wells Fargo Drive");
+        // Purposely do not set lastname to let it default to 'Garfugengheist'
+        // newCust.set("LASTNAME", "Gerkin" );
+
+        das.applyChanges(root);
+
+        Command readNewCust = das.createCommand("select * from CUSTOMER where ID = 100");
+        root = readNewCust.executeQuery();
+
+        // If partial insert was not used, LASTNAME would not be
+        // 'Garfugengheist'
+        newCust = root.getDataObject("CUSTOMER[1]");
+        assertEquals(100, newCust.getInt("ID"));
+        assertEquals("Garfugengheist", newCust.getString("LASTNAME"));
+        assertEquals("5528 Wells Fargo Drive", newCust.getString("ADDRESS"));
+
+    }
+    
+    
+}