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diff --git a/sandbox/jboynes/sdo/impl/src/test/java/org/apache/tuscany/sdo/test/XSDHelperTestCase.java b/sandbox/jboynes/sdo/impl/src/test/java/org/apache/tuscany/sdo/test/XSDHelperTestCase.java
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+++ b/sandbox/jboynes/sdo/impl/src/test/java/org/apache/tuscany/sdo/test/XSDHelperTestCase.java
@@ -0,0 +1,192 @@
+/**
+ *
+ *  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.test;
+
+import java.io.IOException;
+import java.net.URL;
+import java.util.Hashtable;
+import java.util.List;
+import java.util.Vector;
+
+import junit.framework.TestCase;
+
+import org.apache.tuscany.sdo.util.SDOUtil;
+
+import com.example.simple.impl.SimpleFactoryImpl;
+import commonj.sdo.DataObject;
+import commonj.sdo.Type;
+import commonj.sdo.helper.DataFactory;
+import commonj.sdo.helper.TypeHelper;
+import commonj.sdo.helper.XSDHelper;
+
+/**
+ * @version $Rev$ $Date$
+ */
+public class XSDHelperTestCase extends TestCase {
+    private static final String TEST_MODEL = "/simple.xsd";
+    private URL modelURL;
+
+    public void testDefineWithLocation() throws IOException {
+        XSDHelper xsdHelper = SDOUtil.createXSDHelper(SDOUtil.createTypeHelper());
+        List types = xsdHelper.define(modelURL.openStream(), modelURL.toString());
+        assertEquals(2, types.size());
+    }
+
+    public void testDefineWithNoLocation() {
+        XSDHelper xsdHelper = SDOUtil.createXSDHelper(SDOUtil.createTypeHelper());
+        List types = xsdHelper.define(getClass().getResourceAsStream(TEST_MODEL), null);
+        assertEquals(2, types.size());
+    }
+
+    public void testDuplicateDefineWithLocation() throws IOException {
+        XSDHelper xsdHelper = SDOUtil.createXSDHelper(SDOUtil.createTypeHelper());
+        List types = xsdHelper.define(modelURL.openStream(), modelURL.toString());
+        assertEquals(2, types.size());
+
+        List types2 = xsdHelper.define(modelURL.openStream(), modelURL.toString());
+        assertEquals(0, types2.size());
+    }
+    
+    public void testXSDGeneration_staticSDOType() throws IOException 
+    {
+        //test for static sdo type.  The test succeeds if the IllegalArgumentException is thrown
+        //by XSDHelper.generate method in which case the string xsd must be null;
+        XSDHelper xsdHelper = SDOUtil.createXSDHelper(SDOUtil.createTypeHelper());
+        DataObject quoteSDO = (DataObject)SimpleFactoryImpl.INSTANCE.createQuote();
+        List typeList = new Vector();
+        typeList.add(quoteSDO.getType());
+        String xsd = null;
+        
+        try
+        {
+            xsd = xsdHelper.generate(typeList);
+            xsd = "";
+        }
+        catch ( IllegalArgumentException e )
+        {
+        }
+        assertNull(xsd);
+    }
+    
+    public void testXSDGeneration_DynamicSDOType() throws IOException 
+    {
+        //test for dynamic SDOs that have no XSD model.  Here the testcase succeeds only if the 
+        //xsd is generated by XSDHelper in which case xsd must not be null
+        XSDHelper xsdHelper = SDOUtil.createXSDHelper(SDOUtil.createTypeHelper());
+        DataObject quoteType = DataFactory.INSTANCE.create("commonj.sdo", "Type");
+        quoteType.set("uri", "http://www.example.com/dynamic");
+        quoteType.set("name", "DynamicQuote");
+        
+        DataObject aProperty = quoteType.createDataObject("property");
+        aProperty.set("name", "symbol");
+        aProperty.set("type", TypeHelper.INSTANCE.getType("commonj.sdo", "String"));
+        
+        aProperty = quoteType.createDataObject("property");
+        aProperty.set("name", "price");
+        aProperty.set("type", TypeHelper.INSTANCE.getType("commonj.sdo", "Decimal"));
+        
+        aProperty = quoteType.createDataObject("property");
+        aProperty.set("name", "volume");
+        aProperty.set("type", TypeHelper.INSTANCE.getType("commonj.sdo", "Double"));
+        
+        TypeHelper.INSTANCE.define(quoteType);
+        
+        Type dynamicQuoteType = 
+            TypeHelper.INSTANCE.getType("http://www.example.com/dynamic", "DynamicQuote");
+        
+        Vector types = new Vector();
+        types.add(dynamicQuoteType);
+        String xsd = null;
+        
+        try
+        {
+            xsd = xsdHelper.generate(types);
+            //System.out.println(xsd);
+        }
+        catch ( IllegalArgumentException e )
+        {
+        }
+        assertNotNull(xsd);
+        
+    }
+    
+    public void testXSDGeneration_DynamicWithNestedStaticSDOType() throws IOException 
+    {
+        //testing static SDO with XSD Model being contained in a Dynamic SDO not having an XSD Model.
+        //the schema must be generated with imports / includes for the XSD corresponding to the static
+        //sdo types.
+        TypeHelper typeHelper = SDOUtil.createTypeHelper();
+        XSDHelper xsdHelper = SDOUtil.createXSDHelper(typeHelper);
+        
+        DataObject quoteSDO = (DataObject)SimpleFactoryImpl.INSTANCE.createQuote();
+        
+        
+        DataObject quoteType = DataFactory.INSTANCE.create("commonj.sdo", "Type");
+        quoteType.set("uri", "http://www.example.com/dynamic");
+        quoteType.set("name", "DynamicQuote");
+        
+        DataObject aProperty = quoteType.createDataObject("property");
+        aProperty.set("name", "symbol");
+        aProperty.set("type", typeHelper.getType("commonj.sdo", "String"));
+        
+        aProperty = quoteType.createDataObject("property");
+        aProperty.set("name", "price");
+        aProperty.set("type", typeHelper.getType("commonj.sdo", "Decimal"));
+        
+        aProperty = quoteType.createDataObject("property");
+        aProperty.set("name", "volume");
+        aProperty.set("type", typeHelper.getType("commonj.sdo", "Double"));
+        
+        aProperty = quoteType.createDataObject("property");
+        aProperty.set("name", "containedQuotes");
+        aProperty.set("type", typeHelper.getType(quoteSDO.getType().getURI(), quoteSDO.getType().getName()));
+        aProperty.set("containment", new Boolean(true));
+        
+        aProperty = quoteType.createDataObject("property");
+        aProperty.set("name", "referredQuotes");
+        aProperty.set("type", typeHelper.getType(quoteSDO.getType().getURI(), quoteSDO.getType().getName()));
+        
+        typeHelper.define(quoteType);
+        
+        Type dynamicQuoteType = 
+            typeHelper.getType("http://www.example.com/dynamic", "DynamicQuote");
+        Vector types = new Vector();
+        types.add(dynamicQuoteType);
+        String xsd = null;
+        
+        try
+        {
+            Hashtable schemaLocationMap = new Hashtable();
+            schemaLocationMap.put("http://www.example.com/simple", "http://www.example.com/simple/xsd");
+            xsd = xsdHelper.generate(types, schemaLocationMap);
+            //System.out.println(xsd);
+        }
+        catch ( IllegalArgumentException e )
+        {
+        }
+        assertNotNull(xsd);
+        
+    }
+    
+    protected void setUp() throws Exception {
+        super.setUp();
+        modelURL = getClass().getResource(TEST_MODEL);
+    }
+}