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diff --git a/das-java/branches/das-java-beta1/rdb/src/test/java/org/apache/tuscany/das/rdb/test/ExceptionTests.java b/das-java/branches/das-java-beta1/rdb/src/test/java/org/apache/tuscany/das/rdb/test/ExceptionTests.java
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+/*
+ * 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.Connection;
+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.company.CompanyFactory;
+import org.apache.tuscany.das.rdb.test.customer.CustomerFactory;
+import org.apache.tuscany.das.rdb.test.data.BookData;
+import org.apache.tuscany.das.rdb.test.data.CompanyData;
+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.data.OrderDetailsData;
+import org.apache.tuscany.das.rdb.test.framework.DasTest;
+import org.apache.tuscany.sdo.util.SDOUtil;
+
+public class ExceptionTests extends DasTest {
+
+    public ExceptionTests() {
+        super();
+    }
+
+    protected void setUp() throws Exception {
+        super.setUp();
+
+        new CustomerData(getAutoConnection()).refresh();
+        new OrderData(getAutoConnection()).refresh();
+        new BookData(getAutoConnection()).refresh();
+        new OrderDetailsData(getAutoConnection()).refresh();
+        new CompanyData(getAutoConnection()).refresh();
+
+    }
+
+    protected void tearDown() throws Exception {
+        super.tearDown();
+    }
+
+    public void testMissingConnection() throws Exception {
+        DAS das = DAS.FACTORY.createDAS((Connection) null);
+
+        try {
+            Command readCustomers = das.createCommand("select * from CUSTOMER where ID = 1");
+            readCustomers.executeQuery();
+            fail("RuntimeException should be thrown");
+        } catch (RuntimeException ex) {
+            assertEquals("No connection has been provided and no data source has been specified", ex.getMessage());
+        }
+
+    }
+
+    public void testUnregisteredTypes() throws Exception {
+        DAS das = DAS.FACTORY.createDAS(getConfig("staticInvalid.xml"), getConnection());
+        Command readCustomers = das.createCommand("select * from CUSTOMER where ID = 1");
+
+        try {
+            readCustomers.executeQuery();
+
+            fail("Exception should be thrown");
+        } catch (RuntimeException ex) {
+            assertEquals("SDO Types have not been registered for URI invalidURI", ex.getMessage());
+        }
+    }
+
+    public void testMissingMapping() throws Exception {
+        SDOUtil.registerStaticTypes(CustomerFactory.class);
+        DAS das = DAS.FACTORY.createDAS(getConfig("staticCustomer.xml"), getConnection());
+        Command readCustomers = das.createCommand("select * from CUSTOMER where ID = 1");
+
+        try {
+            readCustomers.executeQuery();
+
+            fail("Exception should be thrown");
+        } catch (RuntimeException ex) {
+            assertEquals("An SDO Type with name CUSTOMER was not found", ex.getMessage());
+        }
+
+    }
+
+    /**
+     * Test ability to describe problem when a user passes an empty stream
+     */
+    public void testEmptyStream() throws Exception {
+        try {
+            DAS.FACTORY.createDAS(getConfig("NonExistingFile.xml"));
+            fail("Error should be thrown");
+        } catch (RuntimeException e) {
+            assertEquals("Cannot load configuration from a null InputStream. Possibly caused " 
+                    + "by an incorrect config xml file name", e.getMessage());
+        }
+    }
+
+    /**
+     * Test ability to describe problem when a user passes an empty stream
+     */
+    public void testEmptyStream2() throws Exception {
+        try {
+            DAS.FACTORY.createDAS(getConfig("NonExistingFile.xml"));
+            fail("Error should be thrown");
+        } catch (RuntimeException e) {
+            assertEquals("Cannot load configuration from a null InputStream. Possibly caused "
+                    + "by an incorrect config xml file name", e.getMessage());
+        }
+    }
+
+    public void testReadOrdersAndDetails2() throws Exception {
+
+        DAS das = DAS.FACTORY.createDAS(getConfig("InvalidConfig1.xml"), getConnection());
+        Command read = das.createCommand("SELECT * FROM ANORDER LEFT JOIN ORDERDETAILS "
+                + "ON ANORDER.ID = ORDERDETAILS.ORDERID ORDER BY ANORDER.ID");
+
+        try {
+            read.executeQuery();
+        } catch (Exception ex) {
+            assertEquals("The parent table (xxx) in relationship ORDERDETAILS was not found.", ex.getMessage());
+        }
+
+    }
+
+    public void testMismatchedDataObjectModel() throws SQLException {
+        SDOUtil.registerStaticTypes(CompanyFactory.class);
+        DAS das = DAS.FACTORY.createDAS(getConfig("companyMappingWithConverters.xml"), getConnection());
+        Command read = das.createCommand("select * from company");
+        try {
+            read.executeQuery();
+        } catch (RuntimeException ex) {
+            assertEquals("Type CompanyType does not contain a property named ID", ex.getMessage());
+        }
+    }
+
+}