diff --git a/Klausuren/Sda1/2018Winter/Solve/.gitignore b/Klausuren/Sda1/2018Winter/Solve/.gitignore
index 9b36bc511f68d6e52aeb8b8e7c5ddfe38ed74218..1c0837dafefd658e70bebe46f9daece143b477b6 100644
--- a/Klausuren/Sda1/2018Winter/Solve/.gitignore
+++ b/Klausuren/Sda1/2018Winter/Solve/.gitignore
@@ -1,3 +1,4 @@
+.idea
/target/
/.settings/
.classpath
diff --git a/Klausuren/Sda1/2018Winter/Solve/Schema/schema.sql b/Klausuren/Sda1/2018Winter/Solve/Schema/schema.sql
index 5abcf8e0b4c958d75ed7f1c9fa3b7577502b7f98..dd4fafeed50dacb6d174e9cb6d32f3313a0fe72e 100644
--- a/Klausuren/Sda1/2018Winter/Solve/Schema/schema.sql
+++ b/Klausuren/Sda1/2018Winter/Solve/Schema/schema.sql
@@ -2,36 +2,46 @@ DROP TABLE IF EXISTS Para;
DROP TABLE IF EXISTS Section;
CREATE TABLE Section (
- id CHAR(100) PRIMARY KEY
- ,title TEXT
- ,parent CHAR(100) REFERENCES Section
+ id CHAR(100)
+ ,PRIMARY KEY(id)
+ ,title TEXT NOT NULL
+ ,parent CHAR(100)
+ ,FOREIGN KEY (parent) REFERENCES Section(id)
,revisionFlag CHAR(7)
- ,orderValue INT NOT NULL
+ ,CHECK(revisionFlag in ('new', 'changed', 'deleted'))
+ ,orderValue INT AUTO_INCREMENT UNIQUE
);
CREATE TABLE Para (
- section CHAR(100) NOT NULL REFERENCES Section
+ section CHAR(100) NOT NULL
+ ,FOREIGN KEY (section) REFERENCES Section(id)
,para LONGTEXT
,revisionFlag CHAR(7)
- ,orderValue INT NOT NULL
+ ,CHECK(revisionFlag in ('new', 'changed', 'deleted'))
+ ,orderValue INT AUTO_INCREMENT UNIQUE
);
-INSERT INTO Section VALUES ('categories', 'XML Document categories', NULL, 'new', 1);
-INSERT INTO Section VALUES ('wellFormed', 'Well-formed documents', 'categories' ,NULL, 2);
+INSERT INTO Section (id, title, parent, revisionFlag) VALUES ('categories', 'XML Document categories', NULL, 'new');
+INSERT INTO Section (id, title, parent, revisionFlag) VALUES ('wellFormed', 'Well-formed documents', 'categories', NULL);
+INSERT INTO Section (id, title, parent, revisionFlag) VALUES ('valid', 'Valid documents', 'categories', NULL);
+INSERT INTO Section (id, title, parent, revisionFlag) VALUES ('api', 'Available APIs', NULL, 'deleted');
-INSERT INTO Para VALUES (
- 'categories', 'Documents belonging to this category do not adhere to any schema.','changed', 3);
+INSERT INTO Para (section, para, revisionFlag) VALUES
+ ('categories', 'Documents belonging to this category do not adhere to any schema.','changed');
-INSERT INTO Section VALUES ('valid', 'Valid documents', 'categories', NULL, 4);
-INSERT INTO Para VALUES ('valid', 'Valid documents require a schema.', NULL, 5);
-INSERT INTO Para VALUES ('valid', 'Common standards are DTD, XML Schema and Relax-NG.',NULL, 6);
+INSERT INTO Para (section, para, revisionFlag) VALUES
+ ('valid', 'Valid documents require a schema.', NULL);
-INSERT INTO Section VALUES ('api', 'Available APIs', NULL, 'deleted', 7);
-INSERT INTO Para VALUES ('api', 'We introduce SAX and DOM here.', NULL, 8);
-INSERT INTO Para VALUES ('api', 'Some APIs offer multiple language bindings.', NULL, 9);
+INSERT INTO Para (section, para, revisionFlag) VALUES
+ ('valid', 'Common standards are DTD, XML Schema and Relax-NG.', NULL);
+INSERT INTO Para (section, para, revisionFlag) VALUES
+ ('api', 'We introduce SAX and DOM here.', NULL);
+
+INSERT INTO Para (section, para, revisionFlag) VALUES
+ ('api', 'Some APIs offer multiple language bindings.', NULL);
SELECT * FROM Section;
-SELECT * FROM Para;
+SELECT * FROM Para;
\ No newline at end of file
diff --git a/Klausuren/Sda1/2018Winter/Solve/src/main/java/de/hdm_stuttgart/mi/sda1/Book2Rdbms.java b/Klausuren/Sda1/2018Winter/Solve/src/main/java/de/hdm_stuttgart/mi/sda1/Book2Rdbms.java
index 62daf216697871a07b59e3f97fe2ac0792883943..e547bc65868b0a8f924624f5e57ee453d637734f 100644
--- a/Klausuren/Sda1/2018Winter/Solve/src/main/java/de/hdm_stuttgart/mi/sda1/Book2Rdbms.java
+++ b/Klausuren/Sda1/2018Winter/Solve/src/main/java/de/hdm_stuttgart/mi/sda1/Book2Rdbms.java
@@ -10,18 +10,27 @@ import java.io.File;
import java.io.IOException;
import java.sql.Connection;
import java.sql.DriverManager;
+import java.sql.PreparedStatement;
import java.sql.SQLException;
-public class Book2Rdbms {
+public class Book2Rdbms implements AutoCloseable{
private Connection conn;
+ private PreparedStatement insertSection, insertPara;
+
private Document doc;
public Book2Rdbms() {
try {
conn = DriverManager.getConnection(
"jdbc:mysql://localhost/hdm?serverTimezone=UTC", "hdmuser", "XYZ");
+ insertSection = conn.prepareStatement(
+ "INSERT INTO Section (id, title, parent, revisionFlag) VALUES (?, ?, ?, ?);");
+
+ insertPara = conn.prepareStatement(
+ "INSERT INTO Para (section, para, revisionFlag) VALUES (?, ?, ?)");
+
} catch (SQLException e) {
System.err.println("Unable to establish connection: " + e);
System.exit(1);
@@ -46,19 +55,49 @@ public class Book2Rdbms {
final XPathExpression<Element> xpathSearchPara =
XPathFactory.instance().compile(
- "//para" ,
+ "/book/section" ,
new ElementFilter(),
null ,
Namespace.getNamespace(null));
- System.out.println("Java stream:");
- xpathSearchPara.evaluate(doc).stream().
- map(Element::getText).forEach(System.out::println);
+ xpathSearchPara.evaluate(doc).forEach(this::handleSection);
+ }
+ private void handleSection(final Element section) { // Top level sections
+ handleSection(null, section); // No parent.
+ }
- System.out.println("\nSimple loop:");
- for (final Element e: xpathSearchPara.evaluate(doc)) {
- System.out.println(e.getText());
+ private void handleSection(final String parentId, final Element section) {
+ try {
+ insertSection.setString(1, section.getAttributeValue("id"));
+ insertSection.setString(2, section.getChildText("title"));
+ insertSection.setString(3, parentId);
+ insertSection.setString(4, section.getAttributeValue("revisionflag"));
+ insertSection.execute();
+
+ section.getChildren("section").forEach( // recurse to child <section> elements
+ s -> handleSection(section.getAttributeValue("id") ,s));
+
+ section.getChildren("para").forEach( p -> {
+ try {
+ insertPara.setString(1, section.getAttributeValue("id"));
+ insertPara.setString(2, p.getValue());
+ insertPara.setString(3, p.getAttributeValue("revisionflag"));
+ insertPara.execute();
+ } catch (final SQLException e) {
+ System.err.println("Unable to insert <para>: " + e);
+ System.exit(1);
+ }
+ }
+ );
+ } catch (final SQLException e) {
+ e.printStackTrace();
+ System.err.println("Unable to insert <section>: " + e);
+ System.exit(1);
}
+ }
+ @Override
+ public void close() throws Exception {
+ conn.close();
}
-}
+}
\ No newline at end of file