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diff --git a/sca-java-1.x/tags/java-stable-20060304/das/rdb/src/test/java/org/apache/tuscany/das/rdb/test/GraphMergeTests.java b/sca-java-1.x/tags/java-stable-20060304/das/rdb/src/test/java/org/apache/tuscany/das/rdb/test/GraphMergeTests.java
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+/**
+ *
+ *  Copyright 2005 The Apache Software Foundation or its licensors, as applicable.
+ *
+ *  Licensed 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.util.ArrayList;
+
+import org.apache.tuscany.das.rdb.Command;
+import org.apache.tuscany.das.rdb.merge.impl.GraphMerger;
+import org.apache.tuscany.das.rdb.test.data.CustomerData;
+import org.apache.tuscany.das.rdb.test.data.OrderData;
+import org.apache.tuscany.das.rdb.test.framework.DasTest;
+
+
+import commonj.sdo.DataObject;
+
+public class GraphMergeTests extends DasTest {
+	
+	protected void setUp() throws Exception {
+		super.setUp();
+		
+		new CustomerData(getAutoConnection()).refresh();
+		new OrderData(getAutoConnection()).refresh();
+		
+	}
+
+
+	public void testSingleTableMerge() throws Exception {
+		
+		Command select = Command.FACTORY
+				.createCommand("Select ID, LASTNAME, ADDRESS from CUSTOMER where ID <= :ID");
+		select.setConnection(getConnection());
+		select.setParameterValue("ID", "3");
+		DataObject graph1 = select.executeQuery();
+		assertEquals(3, graph1.getList("CUSTOMER").size());
+
+		select.setParameterValue("ID", "5");
+		DataObject graph2 = select.executeQuery();
+		assertEquals(5, graph2.getList("CUSTOMER").size());
+
+		GraphMerger merger = new GraphMerger();
+		merger.addPrimaryKey("CUSTOMER.ID");
+		DataObject mergedGraph = merger.merge(graph1, graph2);
+
+		assertEquals(5, mergedGraph.getList("CUSTOMER").size());
+	}
+
+	public void testSingleTableMergeThreeGraphs() throws Exception {
+
+		Command select = Command.FACTORY
+				.createCommand("Select ID, LASTNAME, ADDRESS from CUSTOMER where ID <= :ID");
+		select.setConnection(getConnection());
+		select.setParameterValue("ID", "3");
+		DataObject graph1 = select.executeQuery();
+		assertEquals(3, graph1.getList("CUSTOMER").size());
+
+		select.setParameterValue("ID", "4");
+		DataObject graph2 = select.executeQuery();
+		assertEquals(4, graph2.getList("CUSTOMER").size());
+
+		select.setParameterValue("ID", "5");
+		DataObject graph3 = select.executeQuery();
+		assertEquals(5, graph3.getList("CUSTOMER").size());
+
+		GraphMerger merger = new GraphMerger();
+		merger.addPrimaryKey("CUSTOMER.ID");
+		ArrayList graphs = new ArrayList();
+		graphs.add(graph1);
+		graphs.add(graph2);
+		graphs.add(graph3);
+		DataObject mergedGraph = merger.merge(graphs);
+
+		assertEquals(5, mergedGraph.getList("CUSTOMER").size());
+
+	}
+
+	public void testMultiTableMerge() throws Exception {
+		//Read some customers and related orders
+		Command select = Command.FACTORY.createCommand(
+				"SELECT * FROM CUSTOMER LEFT JOIN ANORDER ON CUSTOMER.ID = ANORDER.CUSTOMER_ID where CUSTOMER.ID = :ID ");	
+		select.setConnection(getConnection());
+
+		//Set minimum metadata necessary to describe relationship
+		select.addRelationship("CUSTOMER.ID", "ANORDER.CUSTOMER_ID");
+		select.addPrimaryKey("CUSTOMER.ID");
+		select.addPrimaryKey("ANORDER.ID");
+		
+		select.setConnection(getConnection());
+		select.setParameterValue("ID", new Integer(1));
+		DataObject graph1 = select.executeQuery();
+		
+		DataObject customer = (DataObject)graph1.getList("CUSTOMER").get(0);
+		assertEquals(2, customer.getList("ANORDER").size());	
+		
+		select.setParameterValue("ID", new Integer(2));
+		DataObject graph2 = select.executeQuery();
+		DataObject customer2 = (DataObject)graph2.getList("CUSTOMER").get(0);
+		assertEquals(1, graph2.getList("CUSTOMER").size());
+		assertEquals(1, customer2.getList("ANORDER").size());
+		assertEquals(2, customer2.getInt("ID"));
+		
+		GraphMerger merger = new GraphMerger();
+		merger.addPrimaryKey("CUSTOMER.ID");
+		merger.addPrimaryKey("ANORDER.ID");
+		DataObject mergedGraph = merger.merge(graph1, graph2);
+		
+		assertEquals(3, mergedGraph.getList("ANORDER").size());
+		assertEquals(2, mergedGraph.getList("CUSTOMER").size());
+		
+		DataObject mergedCustomer = (DataObject) mergedGraph.getList("CUSTOMER").get(1);
+		assertEquals(2, mergedCustomer.getInt("ID"));
+		assertEquals(1, mergedCustomer.getList("ANORDER").size());
+		DataObject mergedOrder = (DataObject) mergedCustomer.getList("ANORDER").get(0);
+		assertEquals(4, mergedOrder.getInt("ID"));
+		
+
+	}
+	
+	public void testMultiTableAppendSingleTable() throws Exception {
+		//Read some customers and related orders
+		Command select = Command.FACTORY.createCommand(
+				"SELECT * FROM CUSTOMER LEFT JOIN ANORDER ON CUSTOMER.ID = ANORDER.CUSTOMER_ID where CUSTOMER.ID = :ID ");	
+		select.setConnection(getConnection());
+
+		//Set minimum metadata necessary to describe relationship
+		select.addRelationship("CUSTOMER.ID", "ANORDER.CUSTOMER_ID");
+		select.addPrimaryKey("CUSTOMER.ID");
+		select.addPrimaryKey("ANORDER.ID");
+		
+		select.setConnection(getConnection());
+		select.setParameterValue("ID", new Integer(1));
+		DataObject graph1 = select.executeQuery();
+		
+		DataObject customer = (DataObject)graph1.getList("CUSTOMER").get(0);
+		assertEquals(2, customer.getList("ANORDER").size());
+		
+		Command select2 = Command.FACTORY.createCommand("select * from ANORDER");
+		select2.setConnection(getConnection());
+		DataObject graph2 = select2.executeQuery();
+		assertEquals(4, graph2.getList("ANORDER").size());
+		
+		GraphMerger merger = new GraphMerger();
+		merger.addPrimaryKey("CUSTOMER.ID");
+		merger.addPrimaryKey("ANORDER.ID");
+		DataObject mergedGraph = merger.merge(graph1, graph2);
+		assertEquals(4, mergedGraph.getList("ANORDER").size());
+		assertEquals(1, mergedGraph.getList("CUSTOMER").size());
+	}
+
+}