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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.intermediate;
+
+import java.io.FileInputStream;
+import java.io.FileOutputStream;
+import java.io.ObjectInputStream;
+import java.io.ObjectOutputStream;
+
+import org.apache.tuscany.samples.sdo.SampleBase;
+import org.apache.tuscany.samples.sdo.internal.SampleInfrastructure;
+
+import commonj.sdo.DataObject;
+import commonj.sdo.helper.HelperContext;
+
+/**
+ * Demonstrates serializing and deserializing a DataObject to disk
+ * using java serialization.
+ * <p>
+ * <h3>Running this Sample</h3> See <A HREF="../../../../../../index.html" 
+ * target="_top">the main overview</A> for instructions on how to run this 
+ * sample.
+ */
+public class SerializingDeserializingADataObject  extends SampleBase {
+    HelperContext scope;
+
+    public SerializingDeserializingADataObject(Integer userLevel) {
+      super(userLevel, SAMPLE_LEVEL_INTERMEDIATE);
+    }
+
+
+    public static void main(String[] args) {
+
+      SerializingDeserializingADataObject sample =
+    	  new SerializingDeserializingADataObject(COMMENTARY_FOR_INTERMEDIATE);
+      sample.run();
+
+    }
+
+    /*
+     *  metadata for the sample documenting the areas of SDO that are explored
+     */
+    public static int [] CORE_FUNCTION = {
+      SDOFacets.JAVA_SERIALIZATION_OF_DATA_GRAPH
+    };
+    /*
+     *  metadata for the sample documenting the areas of SDO that are explored
+     */
+    public static int [] SIGNIFICANT_FUNCTION = {
+      SDOFacets.TESTING_FOR_GRAPH_EQUALITY
+    };
+    
+    public void runSample () throws Exception {
+
+        commentary(
+        		"Demonstrates serializing and deserializing a DataObject\n" +
+        		"to disk using Java serialization.");
+
+        scope = useDefaultScopeForTypes();
+        loadTypesFromXMLSchemaFile(scope, SampleInfrastructure.COMPANY_XSD);
+        DataObject company = getDataObjectFromFile(scope, SampleInfrastructure.COMPANY_DATAOBJECT_XML);
+
+
+        commentary("We've loaded a data graph 'company' from a file\n" +
+        		"using XML schema for the model and XML for the graph in the usual manner\n");
+        String fileName = "temporarySerializedDataObject.xml";
+        commentary("We've loaded a data graph 'company' from a file\n" +
+        "using XML schema for the model and XML for the graph in the usual manner\n" +
+        "Now we are going to serialize it to, and read it from a temporary file: "+fileName);
+        
+        commentary(
+        		"The following code,  which doesn't use any SDO APIs, demonstrates the\n" +
+        		"underlying SDO function of performing Java serialization on SDO objects\n\n" +
+        		"FileOutputStream fos = new FileOutputStream(fileName);\n" +
+        		"ObjectOutputStream out = new ObjectOutputStream(fos);\n" +
+        		"out.writeObject(company);\n" +
+        		"out.close();");
+
+        FileOutputStream fos = new FileOutputStream(fileName);
+        ObjectOutputStream out = new ObjectOutputStream(fos);
+        out.writeObject(company);
+        out.close();            
+        
+        // read in DataObject
+        commentary("Having written the data graph to the temporary file we\n" +
+        		"can read it back\n\n" +
+        		"FileInputStream fis = new FileInputStream(fileName);\n" +
+        		"ObjectInputStream input = new ObjectInputStream(fis);\n" +
+        		"DataObject newDataObject = (DataObject) input.readObject();\n" +
+        		"input.close();");
+        
+        FileInputStream fis = new FileInputStream(fileName);
+        ObjectInputStream input = new ObjectInputStream(fis);
+        DataObject newDataObject = (DataObject) input.readObject();
+        input.close();
+        
+        /**
+         * Compare data graphs
+         */
+        
+        commentary("We can use the SDO EqualityHelper to check that we have got\n" +
+        		"back an equivalent graph to the one we had originally\n\n" +
+        		"boolean equal = scope.getEqualityHelper().equal(company, newDataObject);");                       
+
+        boolean equal = scope.getEqualityHelper().equal(company, newDataObject);
+        System.out.println("DataObjects are equal: " + equal);
+        
+       //print out xml representation
+        System.out.println();
+        System.out.println("Original company DataObject:");
+        System.out.println(scope.getXMLHelper().save(company, SampleInfrastructure.COMPANY_NAMESPACE, "company"));
+        
+        System.out.println();
+        System.out.println("Deserialized company DataObject:");
+        System.out.println(scope.getXMLHelper().save(newDataObject, SampleInfrastructure.COMPANY_NAMESPACE, "company"));                       
+            
+
+    }
+}