Includes validator framework and completes Task 3

9 files changed, 316 insertions, 0 deletions

diff --git a/src/de/fhswf/fbin/java2fx/validation/StatusEvent.java b/src/de/fhswf/fbin/java2fx/validation/StatusEvent.java
new file mode 100644
index 0000000..3a6ce24
--- /dev/null
+++ b/src/de/fhswf/fbin/java2fx/validation/StatusEvent.java
@@ -0,0 +1,24 @@
+package de.fhswf.fbin.java2fx.validation;
+
+public class StatusEvent<T>
+{
+   private boolean status;
+   private T value;
+   
+   public StatusEvent(T value, boolean status)
+   {
+      super();
+      this.status = status;
+      this.value = value;
+   }
+   
+   public boolean isStatus()
+   {
+      return status;
+   }
+   
+   public T getValue()
+   {
+      return value;
+   }
+}
diff --git a/src/de/fhswf/fbin/java2fx/validation/StatusListener.java b/src/de/fhswf/fbin/java2fx/validation/StatusListener.java
new file mode 100644
index 0000000..26b341d
--- /dev/null
+++ b/src/de/fhswf/fbin/java2fx/validation/StatusListener.java
@@ -0,0 +1,6 @@
+package de.fhswf.fbin.java2fx.validation;
+
+public interface StatusListener<T>
+{
+   public void stateChanged(StatusEvent<T> e);
+}
diff --git a/src/de/fhswf/fbin/java2fx/validation/ValidationAdapter.java b/src/de/fhswf/fbin/java2fx/validation/ValidationAdapter.java
new file mode 100644
index 0000000..6b6afea
--- /dev/null
+++ b/src/de/fhswf/fbin/java2fx/validation/ValidationAdapter.java
@@ -0,0 +1,64 @@
+package de.fhswf.fbin.java2fx.validation;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import javafx.beans.value.ObservableValue;
+
+public abstract class ValidationAdapter<T> implements Validator<T>
+{
+   private List<StatusListener<T>> listeners;
+
+   private boolean wasValid = true;
+
+   // Partial implementation of interface Validator
+   public boolean validate(T value)
+   {
+      boolean isValidNow = isValid(value);
+      if (isValidNow != wasValid)
+      { // state changed
+         fireChangedEvent(value, isValidNow);
+         wasValid = isValidNow;
+      }
+      return (isValidNow);
+   }
+
+   // Implementation of interface ChangeListener<T>
+   @Override
+   public void changed(ObservableValue<? extends T> observable, T oldValue,
+         T newValue)
+   {
+      validate(newValue);
+   }
+
+   // Support for StatusListeners
+   public void addStatusListener(StatusListener<T> l)
+   {
+      if (listeners == null)
+      {
+         listeners = new ArrayList<>();
+      }
+
+      listeners.add(l);
+   }
+
+   public void removeStatusListener(StatusListener<T> l)
+   {
+      if (listeners != null)
+      {
+         listeners.remove(l);
+      }
+   }
+
+   public void fireChangedEvent(T value, boolean status)
+   {
+      if (listeners != null)
+      {
+         StatusEvent<T> event = new StatusEvent<T>(value, status);
+         for (StatusListener<T> sl : listeners)
+         {
+            sl.stateChanged(event);
+         }
+      }
+   }
+}
diff --git a/src/de/fhswf/fbin/java2fx/validation/Validator.java b/src/de/fhswf/fbin/java2fx/validation/Validator.java
new file mode 100644
index 0000000..ee23298
--- /dev/null
+++ b/src/de/fhswf/fbin/java2fx/validation/Validator.java
@@ -0,0 +1,16 @@
+package de.fhswf.fbin.java2fx.validation;
+
+import javafx.beans.value.ChangeListener;
+
+public interface Validator<T> extends ChangeListener<T>
+{
+
+   public boolean isValid(T value);
+
+   public boolean validate(T value);
+
+   // support StatusListeners
+   public void addStatusListener(StatusListener<T> l);
+
+   public void removeStatusListener(StatusListener<T> l);
+}
diff --git a/src/de/fhswf/in/inf/java2/aufgabe03/EmailTextField.java b/src/de/fhswf/in/inf/java2/aufgabe03/EmailTextField.java
new file mode 100644
index 0000000..e68860c
--- /dev/null
+++ b/src/de/fhswf/in/inf/java2/aufgabe03/EmailTextField.java
@@ -0,0 +1,25 @@
+/**
+ * File for the EmailTextField class.
+ */
+
+package de.fhswf.in.inf.java2.aufgabe03;
+
+/**
+ * A text field that validates email addresses and gives optical feedback.
+ *
+ * @author $Author: $
+ * @version $Revision: $, $Date: $ UTC
+ */
+public class EmailTextField extends RegExTextField
+{
+
+   /**
+    * Creates a RegExTextField that only accepts email addresses.
+    *
+    */
+   public EmailTextField()
+   {
+      super("\\b[a-zA-Z0-9._%-]+@[a-zA-Z0-9.-]+\\.[a-zA-Z]{2,4}\\b", "E-Mail");
+   }
+
+}
diff --git a/src/de/fhswf/in/inf/java2/aufgabe03/JavaFxMain.java b/src/de/fhswf/in/inf/java2/aufgabe03/JavaFxMain.java
new file mode 100644
index 0000000..b822b5f
--- /dev/null
+++ b/src/de/fhswf/in/inf/java2/aufgabe03/JavaFxMain.java
@@ -0,0 +1,47 @@
+/*
+ * 
+ */
+
+package de.fhswf.in.inf.java2.aufgabe03;
+
+import javafx.application.Application;
+import javafx.scene.Scene;
+import javafx.scene.layout.VBox;
+import javafx.stage.Stage;
+
+/**
+ * The loader for a RegExTextField that validates e-mail addresses.
+ *
+ * @author $Author: $
+ * @version $Revision: $, $Date: $ UTC
+ */
+public class JavaFxMain extends Application
+{
+
+   /*
+    * (non-Javadoc)
+    * 
+    * @see javafx.application.Application#start(javafx.stage.Stage)
+    */
+   @Override
+   public void start(Stage primaryStage)
+   {
+      RegExTextField regText = new RegExTextField("[a-z]");
+      EmailTextField emaText = new EmailTextField();
+      VBox vbox = new VBox(regText, emaText);
+      Scene scene = new Scene(vbox);
+      primaryStage.setScene(scene);
+      primaryStage.show();
+   }
+
+   /**
+    * Loads the main window of this application.
+    *
+    * @param args
+    *           Command line arguments
+    */
+   public static void main(String[] args)
+   {
+      launch(args);
+   }
+}
diff --git a/src/de/fhswf/in/inf/java2/aufgabe03/RegExTextField.java b/src/de/fhswf/in/inf/java2/aufgabe03/RegExTextField.java
new file mode 100644
index 0000000..cc68ff2
--- /dev/null
+++ b/src/de/fhswf/in/inf/java2/aufgabe03/RegExTextField.java
@@ -0,0 +1,89 @@
+/**
+ * File containing the RegExTextField class.
+ */
+
+package de.fhswf.in.inf.java2.aufgabe03;
+
+import javafx.scene.control.ContentDisplay;
+import javafx.scene.control.Label;
+import javafx.scene.control.TextField;
+import javafx.scene.image.Image;
+import javafx.scene.image.ImageView;
+import javafx.scene.layout.HBox;
+
+/**
+ * A class that checks an input against a regex and gives optical feedback.
+ *
+ * @author $Author: $
+ * @version $Revision: $, $Date: $ UTC
+ */
+public class RegExTextField extends HBox
+{
+
+   private Label label;
+
+   private TextField textField;
+
+   private RegExValidator rv;
+
+   /**
+    * Creates an element that checks regexes.
+    *
+    * @param regEx
+    *           The regex to check the text field against.
+    */
+   public RegExTextField(String regEx)
+   {
+      this(regEx, "regEx");
+   }
+
+   /**
+    * Creates an element that checks regexes.
+    *
+    * @param regEx
+    *           The regex to check the text field against.
+    * @param labelText
+    *           An optional label that is shown before the text field.
+    */
+   public RegExTextField(String regEx, String labelText)
+   {
+      if (regEx == null)
+      {
+         throw new IllegalArgumentException("RegEx can't be null.");
+      }
+      if (regEx.isEmpty())
+      {
+         throw new IllegalArgumentException("RegEx can't be empty.");
+      }
+      if (labelText == null)
+      {
+         throw new IllegalArgumentException("labelText can't be null.");
+      }
+      if (labelText.isEmpty())
+      {
+         throw new IllegalArgumentException("labelText can't be empty.");
+      }
+      
+      label = new Label(labelText);
+      textField = new TextField();
+
+      label.setContentDisplay(ContentDisplay.RIGHT);
+
+      this.getChildren().addAll(label, textField);
+
+      rv = new RegExValidator(regEx);
+      rv.addStatusListener(e -> {
+            if (!e.isStatus())
+            {
+               label.setGraphic(new ImageView(new Image("img/error.png")));
+            }
+            else
+            {
+               label.setGraphic(null);
+            }
+         });
+
+      textField.textProperty().addListener(rv);
+   }
+
+}
diff --git a/src/de/fhswf/in/inf/java2/aufgabe03/RegExValidator.java b/src/de/fhswf/in/inf/java2/aufgabe03/RegExValidator.java
new file mode 100644
index 0000000..e17b5ca
--- /dev/null
+++ b/src/de/fhswf/in/inf/java2/aufgabe03/RegExValidator.java
@@ -0,0 +1,45 @@
+/**
+ * Java file containing the RegExValidator class.
+ */
+
+package de.fhswf.in.inf.java2.aufgabe03;
+
+import java.util.regex.Pattern;
+
+import de.fhswf.fbin.java2fx.validation.ValidationAdapter;
+
+/**
+ * A class that checks if a given string matches a predefined regex.
+ *
+ * @author $Author: $
+ * @version $Revision: $, $Date: $ UTC
+ */
+public class RegExValidator extends ValidationAdapter<String>
+{
+
+   private Pattern validRegEx;
+
+   /**
+    * A validator that checks a specific regex.
+    *
+    * @param validRegEx
+    *           The regex to validate against
+    */
+   public RegExValidator(String validRegEx)
+   {
+      this.validRegEx = Pattern.compile(validRegEx);
+   }
+
+   /*
+    * (non-Javadoc)
+    * 
+    * @see
+    * de.fhswf.fbin.java2fx.validation.Validator#isValid(java.lang.Object)
+    */
+   @Override
+   public boolean isValid(String value)
+   {
+      return validRegEx.matcher(value).matches();
+   }
+
+}
diff --git a/src/img/error.png b/src/img/error.png
new file mode 100644
index 0000000..a0179e8
--- /dev/null
+++ b/src/img/error.png