From f763492ec75df41ef97ed830b883c15b57e071ff Mon Sep 17 00:00:00 2001
From: Martin Goik <goik@hdm-stuttgart.de>
Date: Thu, 22 Jan 2015 06:29:57 +0100
Subject: [PATCH] working XML export
---
Sda1/Etest/rdbms2catalog/Schema/schema.sql | 4 +-
.../mi/sda1/sql2catalog/Rdbms2Xml.java | 28 +++----
.../mi/sda1/sql2catalog/RdbmsAccess.java | 76 +++++++++----------
3 files changed, 50 insertions(+), 58 deletions(-)
diff --git a/Sda1/Etest/rdbms2catalog/Schema/schema.sql b/Sda1/Etest/rdbms2catalog/Schema/schema.sql
index d08f17306..3f3d2c86f 100644
--- a/Sda1/Etest/rdbms2catalog/Schema/schema.sql
+++ b/Sda1/Etest/rdbms2catalog/Schema/schema.sql
@@ -1,4 +1,4 @@
-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)
diff --git a/Sda1/Etest/rdbms2catalog/src/main/java/de/hdm_stuttgart/mi/sda1/sql2catalog/Rdbms2Xml.java b/Sda1/Etest/rdbms2catalog/src/main/java/de/hdm_stuttgart/mi/sda1/sql2catalog/Rdbms2Xml.java
index 31ebb18b9..f8cc7c88c 100644
--- a/Sda1/Etest/rdbms2catalog/src/main/java/de/hdm_stuttgart/mi/sda1/sql2catalog/Rdbms2Xml.java
+++ b/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);
+ }
}
-
}
diff --git a/Sda1/Etest/rdbms2catalog/src/main/java/de/hdm_stuttgart/mi/sda1/sql2catalog/RdbmsAccess.java b/Sda1/Etest/rdbms2catalog/src/main/java/de/hdm_stuttgart/mi/sda1/sql2catalog/RdbmsAccess.java
index d13fc1070..e2f10f566 100644
--- a/Sda1/Etest/rdbms2catalog/src/main/java/de/hdm_stuttgart/mi/sda1/sql2catalog/RdbmsAccess.java
+++ b/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();
+ }
}
--
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