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diff --git a/das-java/tags/1.0-incubating-beta1-rc3/rdb/src/test/java/org/apache/tuscany/das/rdb/test/RelationshipTests.java b/das-java/tags/1.0-incubating-beta1-rc3/rdb/src/test/java/org/apache/tuscany/das/rdb/test/RelationshipTests.java
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@@ -0,0 +1,241 @@
+/*
+ * 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.ConfigHelper;
+import org.apache.tuscany.das.rdb.DAS;
+import org.apache.tuscany.das.rdb.config.Relationship;
+import org.apache.tuscany.das.rdb.test.data.CompanyData;
+import org.apache.tuscany.das.rdb.test.data.CompanyEmpData;
+import org.apache.tuscany.das.rdb.test.data.CustomerData;
+import org.apache.tuscany.das.rdb.test.data.DepEmpData;
+import org.apache.tuscany.das.rdb.test.data.DepartmentData;
+import org.apache.tuscany.das.rdb.test.data.EmployeeData;
+import org.apache.tuscany.das.rdb.test.data.OrderData;
+import org.apache.tuscany.das.rdb.test.framework.DasTest;
+
+import commonj.sdo.DataObject;
+
+public class RelationshipTests extends DasTest {
+
+    protected void setUp() throws Exception {
+        super.setUp();
+
+        new CustomerData(getAutoConnection()).refresh();
+        new OrderData(getAutoConnection()).refresh();
+
+        new CompanyData(getAutoConnection()).refresh();
+        new EmployeeData(getAutoConnection()).refresh();
+        new DepartmentData(getAutoConnection()).refresh();
+        new CompanyEmpData(getAutoConnection()).refresh();
+        new DepEmpData(getAutoConnection()).refresh();
+    }
+
+    protected void tearDown() throws Exception {
+        super.tearDown();
+    }
+
+    /**
+     * Test ability to read a compound graph
+     */
+    public void testRead() throws Exception {
+
+        String statement = "SELECT * FROM CUSTOMER LEFT JOIN ANORDER "
+                + "ON CUSTOMER.ID = ANORDER.CUSTOMER_ID WHERE CUSTOMER.ID = 1";
+
+        DAS das = DAS.FACTORY.createDAS(getConfig("customerOrderRelationshipMapping.xml"), getConnection());
+        // Read some customers and related orders
+        Command select = das.createCommand(statement);
+
+        DataObject root = select.executeQuery();
+        DataObject customer = root.getDataObject("CUSTOMER[1]");
+
+        assertEquals(2, customer.getList("orders").size());
+
+    }
+
+    /**
+     * Same as above except uses xml file for relationhip and key information.
+     * Employs CUD generation.
+     */
+    public void testRelationshipModification2() throws Exception {
+
+        DAS das = DAS.FACTORY.createDAS(getConfig("basicCustomerOrderMapping.xml"), getConnection());
+        // Read some customers and related orders
+        Command select = das
+                .createCommand("SELECT * FROM CUSTOMER LEFT JOIN ANORDER ON CUSTOMER.ID = ANORDER.CUSTOMER_ID");
+
+        DataObject root = select.executeQuery();
+        
+        DataObject cust1 = root.getDataObject("CUSTOMER[1]");
+        DataObject cust2 = root.getDataObject("CUSTOMER[2]");
+
+        // Save IDs
+        Integer cust1ID = (Integer) cust1.get("ID");
+        Integer cust2ID = (Integer) cust2.get("ID");
+        // save order count
+        Integer cust1OrderCount = Integer.valueOf(cust1.getList("orders").size());
+        Integer cust2OrderCount = Integer.valueOf(cust2.getList("orders").size());
+
+        // Move an order to cust1 from cust2
+        DataObject order = (DataObject) cust2.getList("orders").get(0);
+        cust1.getList("orders").add(order);
+
+        // Flush changes
+        das.applyChanges(root);
+
+        // verify cust1 relationship updates
+        select = das
+                .createCommand("SELECT * FROM CUSTOMER LEFT JOIN ANORDER ON "
+                        + "CUSTOMER.ID = ANORDER.CUSTOMER_ID where CUSTOMER.ID = ?");
+        select.setParameter(1, cust1ID);
+
+        root = select.executeQuery();
+        assertEquals(cust1OrderCount.intValue() + 1, root.getList("CUSTOMER[1]/orders").size());
+
+        // verify cust2 relationship updates
+        select.setParameter(1, cust2ID);
+        root = select.executeQuery();
+        assertEquals(cust2OrderCount.intValue() - 1, root.getList("CUSTOMER[1]/orders").size());
+
+    }
+    
+    /**
+     * This scenario uses union to simmulate full outer join
+     * The resulted graph will have departments without employees, and employees without departments
+     * And this testcase will modify the relationship between these entities and assign the employees to the department
+     * 
+     * @throws Exception
+     */
+    public void testSimulateFullOuterJoinRelationshipModification() throws Exception {
+
+        DAS das = DAS.FACTORY.createDAS(getConfig("companyMappingWithResultDescriptor.xml"), getConnection());
+        // Read some customers and related orders
+        
+        Command select = das.getCommand("testFullOuterJoinRelationship");
+        DataObject root = select.executeQuery();
+
+        DataObject department = root.getDataObject("DEPARTMENT[NAME='New Technologies']"); //department with no employees
+                
+        DataObject emp1 = root.getDataObject("EMPLOYEE[NAME='Mary Smith']"); //employee not assgned to department
+        DataObject emp2 = root.getDataObject("EMPLOYEE[NAME='John Smith']"); //employee not assgned to department
+        
+        department.getList("employees").add(emp1);
+        department.getList("employees").add(emp2);
+
+        das.applyChanges(root);
+
+        //verify cust1 relationship updates
+        select = das.getCommand("testEmployeesFromDepartment");
+        select.setParameter(1, "New Technologies" );
+
+        root = select.executeQuery();
+        assertEquals(2, root.getDataObject("DEPARTMENT[NAME='New Technologies']").getList("employees").size());
+
+        
+
+    }
+    
+    public void testFKBehavior() throws SQLException {
+
+        DAS das = DAS.FACTORY.createDAS(getConfig("basicCustomerOrderMapping.xml"), getConnection());
+        // Read some customers and related orders
+        Command select = das
+                .createCommand("SELECT * FROM CUSTOMER LEFT JOIN ANORDER ON CUSTOMER.ID = ANORDER.CUSTOMER_ID");
+
+        DataObject root = select.executeQuery();
+
+        DataObject cust1 = root.getDataObject("CUSTOMER[1]");
+        DataObject cust2 = root.getDataObject("CUSTOMER[2]");
+
+        // Save IDs
+        Integer cust1ID = (Integer) cust1.get("ID");
+        
+        // Move an order to cust1 from cust2
+        DataObject order = (DataObject) cust2.getList("orders").get(0);
+        cust1.getList("orders").add(order);
+        order.setInt("CUSTOMER_ID", cust1ID);
+       
+        try {
+            das.applyChanges(root);
+            fail("An exception should be thrown");
+        } catch (RuntimeException ex) {
+            assertEquals("Foreign key properties should not be set when the corresponding relationship has changed", ex.getMessage());
+        }
+
+    }
+    
+    public void testFKBehavior2() throws SQLException {
+        DAS das = DAS.FACTORY.createDAS(getConfig("basicCustomerOrderMapping.xml"), getConnection());
+        // Read some customers and related orders
+        Command select = das
+                .createCommand("SELECT * FROM CUSTOMER LEFT JOIN ANORDER ON CUSTOMER.ID = ANORDER.CUSTOMER_ID");
+
+        DataObject root = select.executeQuery();
+
+        DataObject cust1 = root.getDataObject("CUSTOMER[1]");     
+
+        // Save IDs
+        Integer cust1ID = (Integer) cust1.get("ID");
+        
+        // Move an order to cust1 from cust2
+        DataObject order = root.createDataObject("ANORDER");
+        order.setInt("ID", 500);
+        order.setInt("CUSTOMER_ID", cust1ID);
+        cust1.getList("orders").add(order);       
+       
+        try {
+            das.applyChanges(root);
+            fail("An exception should be thrown");
+        } catch (RuntimeException ex) {
+            assertEquals("Foreign key properties should not be set when the corresponding relationship has changed", ex.getMessage());
+        }
+    }
+    
+    public void testInvalidFKColumn() throws SQLException {
+        ConfigHelper helper = new ConfigHelper();
+        Relationship r = helper.addRelationship("CUSTOMER.ID", "ANORDER.CUSTOMER_ID_INVALID");
+        r.setName("orders");
+       
+
+        DAS das = DAS.FACTORY.createDAS(helper.getConfig(), getConnection());
+        Command select = das.createCommand("select * from CUSTOMER left join ANORDER "
+                + "ON CUSTOMER.ID = ANORDER.CUSTOMER_ID");
+
+        DataObject root = select.executeQuery();  
+        DataObject cust1 = root.getDataObject("CUSTOMER[1]");  
+        DataObject order = root.createDataObject("ANORDER");
+        order.setInt("ID", 500);
+        cust1.getList("orders").add(order);   
+        try {
+            das.applyChanges(root);
+        } catch (RuntimeException ex) {
+            assertEquals("Invalid foreign key column: CUSTOMER_ID_INVALID", ex.getMessage());
+        }
+    }
+    
+}