Add xml saving and loading

3 files changed, 163 insertions, 6 deletions

diff --git a/src/de/fhswf/in/inf/se/notepadMinusMinus/Main.java b/src/de/fhswf/in/inf/se/notepadMinusMinus/Main.java
index 9481abe..55e550a 100644
--- a/src/de/fhswf/in/inf/se/notepadMinusMinus/Main.java
+++ b/src/de/fhswf/in/inf/se/notepadMinusMinus/Main.java
@@ -1,11 +1,21 @@
 package de.fhswf.in.inf.se.notepadMinusMinus;
 
+import java.io.File;
+import java.util.prefs.Preferences;
+
+import javax.xml.bind.JAXBContext;
+import javax.xml.bind.Marshaller;
+import javax.xml.bind.Unmarshaller;
+
 import de.fhswf.in.inf.se.notepadMinusMinus.model.Grade;
+import de.fhswf.in.inf.se.notepadMinusMinus.model.Grades;
 import javafx.application.Application;
 import javafx.collections.FXCollections;
 import javafx.collections.ObservableList;
 import javafx.fxml.FXMLLoader;
 import javafx.scene.Scene;
+import javafx.scene.control.Alert;
+import javafx.scene.control.Alert.AlertType;
 import javafx.scene.layout.BorderPane;
 import javafx.stage.Stage;
 
@@ -14,13 +24,19 @@ public class Main extends Application
    private ObservableList<Grade> gradeList = FXCollections
          .observableArrayList();
 
+   private Stage primaryStage;
+
    @Override
    public void start(Stage primaryStage)
    {
+      this.primaryStage = primaryStage;
+
       try
       {
-         BorderPane root = (BorderPane) FXMLLoader
-               .load(getClass().getResource("view/mainView.fxml"));
+         FXMLLoader loader = new FXMLLoader(
+               getClass().getResource("view/MainView.fxml"));
+         BorderPane root = (BorderPane) loader.load();
+
          Scene scene = new Scene(root);
          primaryStage.setScene(scene);
          primaryStage.setMaximized(true);
@@ -41,4 +57,102 @@ public class Main extends Application
    {
       return gradeList;
    }
+
+   public File getGradesFilePath()
+   {
+      Preferences prefs = Preferences.userNodeForPackage(Main.class);
+      String filePath = prefs.get("filePath", null);
+      if (filePath != null)
+      {
+         return new File(filePath);
+      }
+      else
+      {
+         return null;
+      }
+   }
+
+   public void setGradesFilePath(File file)
+   {
+      Preferences prefs = Preferences.userNodeForPackage(Main.class);
+      if (file != null)
+      {
+         prefs.put("filePath", file.getPath());
+
+         // Update the stage title.
+         primaryStage.setTitle("Notepad-- - " + file.getName());
+      }
+      else
+      {
+         prefs.remove("filePath");
+
+         // Update the stage title.
+         primaryStage.setTitle("Notepad--");
+      }
+   }
+
+   public void loadGradesFromFile(File file)
+   {
+      try
+      {
+         JAXBContext context = JAXBContext.newInstance(Grades.class);
+         Unmarshaller um = context.createUnmarshaller();
+
+         // Reading XML from the file and unmarshalling.
+         Grades wrapper = (Grades) um.unmarshal(file);
+
+         gradeList.clear();
+         gradeList.addAll(wrapper.getGrades());
+
+         // Save the file path to the registry.
+         setGradesFilePath(file);
+
+      }
+      catch (Exception e)
+      { // catches ANY exception
+         Alert alert = new Alert(AlertType.ERROR);
+         alert.initOwner(primaryStage);
+         alert.setTitle("Fehler");
+         alert.setHeaderText("Konnte Noten nicht laden.");
+         alert.setContentText(
+               "Konnte Noten nicht aus folgender Datei laden:\n"
+                     + file.getPath());
+
+         alert.showAndWait();
+      }
+   }
+
+   public void saveGradesToFile(File file)
+   {
+      try
+      {
+         JAXBContext context = JAXBContext.newInstance(Grades.class);
+         Marshaller m = context.createMarshaller();
+         m.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, true);
+
+         // Wrapping our grades data.
+         Grades wrapper = new Grades();
+         wrapper.setGrades(gradeList);
+
+         // Marshalling and saving XML to the file.
+         m.marshal(wrapper, file);
+      }
+      catch (Exception e)
+      { // catches ANY exception
+         Alert alert = new Alert(AlertType.ERROR);
+         alert.initOwner(primaryStage);
+         alert.setTitle("Fehler");
+         alert.setHeaderText("Konnte Noten nicht speichern.");
+         alert.setContentText(
+               "Konnte Noten nicht in folgende Datei speichern:\n"
+                     + file.getPath());
+
+         alert.showAndWait();
+      }
+   }
+
+   public void saveGradesToFile()
+   {
+      saveGradesToFile(getGradesFilePath());
+   }
 }
diff --git a/src/de/fhswf/in/inf/se/notepadMinusMinus/model/Grade.java b/src/de/fhswf/in/inf/se/notepadMinusMinus/model/Grade.java
index 0b1528f..3e87d5c 100644
--- a/src/de/fhswf/in/inf/se/notepadMinusMinus/model/Grade.java
+++ b/src/de/fhswf/in/inf/se/notepadMinusMinus/model/Grade.java
@@ -3,8 +3,16 @@
  */
 package de.fhswf.in.inf.se.notepadMinusMinus.model;
 
+import java.math.BigDecimal;
+
+import javax.xml.bind.annotation.XmlAttribute;
+import javax.xml.bind.annotation.XmlRootElement;
+import javax.xml.bind.annotation.XmlValue;
+
 import javafx.beans.property.IntegerProperty;
+import javafx.beans.property.ObjectProperty;
 import javafx.beans.property.SimpleIntegerProperty;
+import javafx.beans.property.SimpleObjectProperty;
 import javafx.beans.property.SimpleStringProperty;
 import javafx.beans.property.StringProperty;
 
@@ -14,6 +22,7 @@ import javafx.beans.property.StringProperty;
  * @author $Author: $
  * @version $Revision: $, $Date: $ UTC
  */
+@XmlRootElement(name = "grade")
 public class Grade
 {
    private IntegerProperty semester = new SimpleIntegerProperty();
@@ -22,7 +31,7 @@ public class Grade
 
    private IntegerProperty ects = new SimpleIntegerProperty();
 
-   private IntegerProperty grade = new SimpleIntegerProperty();
+   private ObjectProperty<BigDecimal> grade = new SimpleObjectProperty<>();
 
    private IntegerProperty attempt = new SimpleIntegerProperty();
 
@@ -31,6 +40,7 @@ public class Grade
       return this.semester;
    }
 
+   @XmlAttribute(name = "semester")
    public final int getSemester()
    {
       return this.semesterProperty().get();
@@ -46,6 +56,7 @@ public class Grade
       return this.modulename;
    }
 
+   @XmlAttribute(name = "modulename", required = true)
    public final String getModulename()
    {
       return this.modulenameProperty().get();
@@ -61,6 +72,7 @@ public class Grade
       return this.ects;
    }
 
+   @XmlAttribute(name = "ects")
    public final int getEcts()
    {
       return this.ectsProperty().get();
@@ -71,17 +83,18 @@ public class Grade
       this.ectsProperty().set(ects);
    }
 
-   public final IntegerProperty gradeProperty()
+   public final ObjectProperty<BigDecimal> gradeProperty()
    {
       return this.grade;
    }
 
-   public final int getGrade()
+   @XmlValue
+   public final BigDecimal getGrade()
    {
       return this.gradeProperty().get();
    }
 
-   public final void setGrade(final int grade)
+   public final void setGrade(final BigDecimal grade)
    {
       this.gradeProperty().set(grade);
    }
@@ -91,6 +104,7 @@ public class Grade
       return this.attempt;
    }
 
+   @XmlAttribute(name = "attempt")
    public final int getAttempt()
    {
       return this.attemptProperty().get();
diff --git a/src/de/fhswf/in/inf/se/notepadMinusMinus/model/Grades.java b/src/de/fhswf/in/inf/se/notepadMinusMinus/model/Grades.java
new file mode 100644
index 0000000..9518aee
--- /dev/null
+++ b/src/de/fhswf/in/inf/se/notepadMinusMinus/model/Grades.java
@@ -0,0 +1,29 @@
+package de.fhswf.in.inf.se.notepadMinusMinus.model;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import javax.xml.bind.annotation.XmlElement;
+import javax.xml.bind.annotation.XmlRootElement;
+
+@XmlRootElement(name = "grades")
+public class Grades
+{
+   protected List<Grade> grades;
+
+   @XmlElement(name = "grade", required = true)
+   public List<Grade> getGrades()
+   {
+      if (grades == null)
+      {
+         grades = new ArrayList<Grade>();
+      }
+      return this.grades;
+   }
+
+   public void setGrades(List<Grade> consumption)
+   {
+      this.grades = consumption;
+   }
+
+}