working XML export

Sda1/Etest/rdbms2catalog/Schema/schema.sql

-DROP TABLE IF EXISTS Description;
+DROP TABLE IF EXISTS Student;
 DROP TABLE IF EXISTS StudyCourse;
 
 CREATE TABLE StudyCourse (
@@ -12,7 +12,7 @@ CREATE TABLE StudyCourse (
 
 CREATE TABLE Student (
    id INTEGER NOT NULL PRIMARY KEY
-  ,fullName VARCHAR(255)
+  ,fullName VARCHAR(255) NOT NULL
   ,email VARCHAR(255) NOT NULL UNIQUE
   ,studyCourse INTEGER
   ,FOREIGN KEY(studyCourse) REFERENCES StudyCourse(id)

Sda1/Etest/rdbms2catalog/src/main/java/de/hdm_stuttgart/mi/sda1/sql2catalog/Rdbms2Xml.java

@@ -5,31 +5,20 @@ import java.sql.Connection;
 import java.sql.DriverManager;
 import java.sql.SQLException;
 
-import javax.xml.parsers.ParserConfigurationException;
-
-import org.apache.logging.log4j.LogManager;
-import org.apache.logging.log4j.Logger;
 import org.jdom2.Element;
 import org.jdom2.output.Format;
 import org.jdom2.output.XMLOutputter;
-import org.xml.sax.SAXException;
 
 /**
  * A simple SAX parser demo
  * 
  */
 public class Rdbms2Xml {
-   private static final Logger log = LogManager.getLogger(Rdbms2Xml.class);
 
    /**
-    * @param args
-    *           Unused
-    * @throws SAXException
-    * @throws ParserConfigurationException
-    * @throws IOException
+    * @param args Unused
     */
-   public static void main(String[] args) throws ParserConfigurationException,
-         SAXException, IOException {
+   public static void main(String[] args) {
 
 
       
@@ -41,7 +30,6 @@ public class Rdbms2Xml {
          Helper.exitWithErrorMessage(Messages.getString("Xml2Rdbms.errMsgUnableRegisterDriverClass") + sqlDriverClassName + "'", 1);
       }
 
-
       // Opening a JDBC connection
       // 
       Connection conn = null;
@@ -54,7 +42,6 @@ public class Rdbms2Xml {
          Helper.exitWithErrorMessage(Messages.getString("Xml2Rdbms.errMsgUnableToConnect") + userName + "' to '" + 
                jdbcConnectionUrl + "'", 1); 
       }
-      
       RdbmsAccess rdbmsAccess = null;
       try {
          rdbmsAccess = new RdbmsAccess(conn);
@@ -66,16 +53,21 @@ public class Rdbms2Xml {
       final Element studyCourses = new Element("studyCourses");
       universityElement.addContent(studyCourses);
       final Element students = new Element("students");
+      universityElement.addContent(students);
       
       try {
-         rdbmsAccess.appendProducts(universityElement);
+         rdbmsAccess.appendStudyCourses(studyCourses);
+         rdbmsAccess.appendStudents(students);
       } catch (SQLException e) {
          Helper.exitWithErrorMessage("Unable to read database:" + e.getLocalizedMessage(), 1);
       }
       
       // Write XML content to standard output
       XMLOutputter outputter = new XMLOutputter(Format.getPrettyFormat());
-      outputter.output(universityElement, System.out);
+      try {
+         outputter.output(universityElement, System.out);
+      } catch (IOException e) {
+         Helper.exitWithErrorMessage("Unable to write XML data:" + e.getLocalizedMessage(), 1);
+      }
    }
-   
 }

Sda1/Etest/rdbms2catalog/src/main/java/de/hdm_stuttgart/mi/sda1/sql2catalog/RdbmsAccess.java

@@ -13,7 +13,7 @@ import org.jdom2.Element;
  */
 public class RdbmsAccess {
 	
-	final PreparedStatement selectProduct, selectDescription;
+	final PreparedStatement selectStudyCourses, selectStudents;
 
 	/**
 	 * @param conn Destination RDBMS
@@ -21,43 +21,43 @@ public class RdbmsAccess {
 	 */
 	public RdbmsAccess(final Connection conn) throws SQLException {
 	   conn.setAutoCommit(false);
-	   selectProduct = conn.prepareStatement("SELECT * FROM Product");
-	   selectDescription = conn.prepareStatement("SELECT * FROM Description WHERE product = ? ORDER BY orderIndex");
+	   selectStudyCourses = conn.prepareStatement("SELECT * FROM StudyCourse");
+	   selectStudents = conn.prepareStatement("SELECT * FROM Student");
 	}
 	
-	public void appendProducts(final Element root) throws SQLException {
-	   final ResultSet products = selectProduct.executeQuery();
-	   
-	   while (products.next()) {
-	      final int productId = products.getInt("id");
-	      final Element productElement = new Element("product");
-	      root.addContent(productElement);
-	      productElement.setAttribute("id", "" + productId);
-	      
-	      final Element nameElement = new Element("name");
-	      productElement.addContent(nameElement);
-	      nameElement.addContent(products.getString("name"));
-	      
-         addDescriptions(productId, productElement);
-
-         final int productAge = products.getInt("age");
-	      if (!products.wasNull()) {
-	         final Element ageElement = new Element("age");
-	         productElement.addContent(ageElement);
-	         ageElement.addContent("" + productAge);
-	      }
-	   }
-      products.close();
-	}
-	
-	private void addDescriptions(final int productId, final Element productElement) throws SQLException {
-	   selectDescription.setInt(1, productId);
-	   final ResultSet descriptions = selectDescription.executeQuery();
-	   while (descriptions.next()) {
-	      final Element descriptionElement = new Element("description");
-	      productElement.addContent(descriptionElement);
-	      descriptionElement.addContent(descriptions.getString("text"));
-	   }
-	   descriptions.close();
-	}
+   public void appendStudyCourses(final Element parent) throws SQLException {
+      final ResultSet studyCourses = selectStudyCourses.executeQuery();
+      
+      while (studyCourses.next()) {
+         final Element studyCourse = new Element("studyCourse");
+         parent.addContent(studyCourse);
+         studyCourse.setAttribute("id", "" + studyCourses.getInt("id"))
+                    .addContent(new Element("name").setText(studyCourses.getString("name")))
+                    .setAttribute("program",studyCourses.getString("program"))
+                    ;
+         final String shortName = studyCourses.getString("shortName");
+         if (!studyCourses.wasNull()){
+            studyCourse.addContent(new Element("shortName").setText(shortName));
+         }
+      }
+      studyCourses.close();
+   }
+   
+   public void appendStudents(final Element parent) throws SQLException {
+      final ResultSet students = selectStudents.executeQuery();
+      
+      while (students.next()) {
+         final Element student = new Element("student");
+         parent.addContent(student);
+         student.setAttribute("id", "" + students.getInt("id"))
+                .addContent(new Element("fullName").setText(students.getString("fullName")))
+                .addContent(new Element("email").setText(students.getString("email")))
+                    ;
+         final int studyCourse = students.getInt("studyCourse");
+         if (!students.wasNull()){
+            student.setAttribute("studyCourse", "" + studyCourse);
+         }
+      }
+      students.close();
+   }
 }