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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.samples.sdo.specExampleSection;
+
+import commonj.sdo.helper.XMLHelper;
+import commonj.sdo.helper.XSDHelper;
+import commonj.sdo.helper.EqualityHelper;
+import commonj.sdo.DataObject;
+
+import java.io.BufferedReader;
+import java.io.FileInputStream;
+import java.io.InputStreamReader;
+import java.io.ObjectInputStream;
+import java.io.FileOutputStream;
+import java.io.ObjectOutputStream;
+import java.io.IOException;
+
+
+import org.apache.tuscany.samples.sdo.SdoSampleConstants;
+
+/**
+ * Demonstrates serializing and deserializing a DataObject to disk.
+ * 
+ * The following sample is from the <a href="http://incubator.apache.org/tuscany"
+ * target="_blank"> Apache Tuscany</a> project. It was written to help users
+ * understand and experiement with SDO. It is based upon example code contained
+ * within, and is meant for use with, and reference to the <a
+ * href="http://www.osoa.org/download/attachments/791/SDO_Specification_Java_V2.01.pdf?version=1"
+ * target="_bank">SDO Specification</a>. In general this sample attempts to use the
+ * code and comments contained within the specification, exceptions to this are noted
+ * in comments.<br>
+ * <br>
+ * The following sample is based upon the 'Serializing/Deserializing a DataGraph or DataObject' example from the Examples section of the SDO
+ * specification. <br>
+ * <br>
+ * The DataObject and DataGraph interfaces extend java.io.Serializable, so any DataObject
+ * or DataGraph be serialized.  The following code serializes the company dataObject to a file
+ * of the user's choosing.  The file is not deleted after execution.<br> 
+ * <br><br>
+ * <b>Usage:</b> <br>
+ * This sample can easily be run from within Eclipse as a Java Application if tuscany or 
+ * the sample-sdo project is imported into Eclipse as an existing project.
+ * <br><br>
+ * If executing as a standalone application please do the following: 
+ * <br>
+ * <UL>
+ * <LI>Include the following jar files on your classpath :
+ * <UL>
+ * <LI>SDO API and Tuscany Implementation
+ * <UL>
+ * <LI>sdo-api-{version}.jar - SDO API
+ * <LI>tuscany-sdo-impl-{version}.jar - Tuscany SDO implementation
+ * </UL>
+ * </LI>
+ * <LI>EMF dependencies. 
+ * <UL>
+ * <LI>emf-common-{version}.jar - some common framework utility and base classes
+ * <LI>emf-ecore-{version}.jar - the EMF core runtime implementation classes (the Ecore metamodel)
+ * <LI>emf-ecore-change-{version}.jar - the EMF change recorder and framework
+ * <LI>emf-ecore-xmi-{version}.jar - EMF's default XML (and XMI) serializer and loader
+ * <LI>xsd-{version}.jar - the XML Schema model
+ * </UL>
+ * </LI>
+ * </UL>
+ * 
+ * These jar files can be obtained from directly from Tuscany and EMF projects or from <a
+ * href="http://wiki.apache.org/ws-data/attachments/Tuscany(2f)TuscanyJava(2f)SDO_Java_Overview/attachments/SDO%20Execution%20Dependencies"
+ * target="_bank">SDO Execution Dependancies </a> </LI>
+ * <LI>Execute: <br>
+ * java org.apache.tuscany.samples.sdo.specExampleSection.SerializingDesearializingADataObject</LI>
+ * </UL>
+ * 
+ * @author Robbie Minshall
+ */
+
+public class SerializingDesearializingADataObject {
+
+    /**
+     * Default fileName to serialize DataObject to
+     */
+    public static final String DEFAULT_FILE_NAME = "temporarySerializedDataObject.xml";
+    
+    public static void serializeDO(DataObject DataObject, String fileName) throws IOException {
+        // serialize data object
+        FileOutputStream fos = new FileOutputStream(fileName);
+        ObjectOutputStream out = new ObjectOutputStream(fos);
+        out.writeObject(DataObject);
+        out.close();
+    }
+
+    /**
+     * Execute this method in order to run the sample.
+     * 
+     * @param args
+     */
+    public static void main(String[] args) {
+        System.out.println("***************************************");
+        System.out.println("SDO Sample AccessingTheContentsOfASequence");
+        System.out.println("***************************************");
+        System.out.println("Demonstrates serializing and deserializing a DataObject to disk.");
+        System.out.println("***************************************");
+        
+
+        try {
+            // define Types using XSDHelper and predefined xsd file
+            System.out.println("Defining Types using XSD");
+            XSDHelper.INSTANCE.define(ClassLoader.getSystemResourceAsStream(SdoSampleConstants.COMPANY_XSD), null);
+            System.out.println("Type definition completed");
+
+            // create company DataObject using XMLHelper which is an example of a XML DAS
+            System.out.println("Creating company DataObject");
+            DataObject company = XMLHelper.INSTANCE.load(ClassLoader.getSystemResourceAsStream(SdoSampleConstants.COMPANY_DATAOBJECT_XML))
+                    .getRootObject();
+
+            // prompt user for a fileName
+            BufferedReader in = new BufferedReader(new InputStreamReader(System.in));
+            System.out.print("Please enter file name, enter for default :");
+            String fileName = in.readLine();
+            if ( (fileName == null) || (fileName.equals(""))){
+                fileName = DEFAULT_FILE_NAME;
+            }
+                     
+            // serialize dataObject out
+            System.out.println("Serializing DataObject to " + fileName);
+            FileOutputStream fos = new FileOutputStream(fileName);
+            ObjectOutputStream out = new ObjectOutputStream(fos);
+            out.writeObject(company);
+            out.close();            
+            
+            // read in DataObject
+            System.out.println("Deserialize DataObject from file");
+            FileInputStream fis = new FileInputStream(fileName);
+            ObjectInputStream input = new ObjectInputStream(fis);
+            DataObject newDataObject = (DataObject) input.readObject();
+            input.close();
+            
+            /**
+             * Compare DataObjects
+             */
+            
+            System.out.println("Comparing original and deserialized DataObject");                       
+            //determine if two graphs of DataObjects are equal 
+            System.out.println("DataObjects are equal: " + EqualityHelper.INSTANCE.equal(company, newDataObject));
+            
+            //determine if two DataObjects have the same values for their datatype properties          
+            System.out.println("DataObjects have same values for their datatype properties : " + EqualityHelper.INSTANCE.equalShallow(company, newDataObject));
+                                 
+            //print out xml representation
+            System.out.println();
+            System.out.println("Original company DataObject:");
+            System.out.println(XMLHelper.INSTANCE.save(company, SdoSampleConstants.COMPANY_NAMESPACE, "company"));
+            
+            System.out.println();
+            System.out.println("Deserialized company DataObject:");
+            System.out.println(XMLHelper.INSTANCE.save(newDataObject, SdoSampleConstants.COMPANY_NAMESPACE, "company"));                       
+            
+        } catch (Exception e) {
+            System.out.println("Sorry there was an error encountered " + e.toString());
+            e.printStackTrace();
+        }
+        
+        System.out.println("GoodBye");
+
+    }
+}