Modernize project structure, update Maven config, move sources, add logging config, update README and .gitignore

7 files changed, 4537 insertions, 0 deletions

diff --git a/src/main/java/simulator/VSCreateTask.java b/src/main/java/simulator/VSCreateTask.java
new file mode 100644
index 0000000..9a6426b
--- /dev/null
+++ b/src/main/java/simulator/VSCreateTask.java
@@ -0,0 +1,179 @@
+package simulator;
+
+import core.VSInternalProcess;
+import core.VSTask;
+import events.VSAbstractEvent;
+import events.VSRegisteredEvents;
+import events.internal.VSProtocolEvent;
+
+/**
+ * The class VSCreateTask, an object of this class represents how new
+ * VSTask objects are to be created using JComboBox selections of the
+ * GUI editor..
+ *
+ * @author Paul C. Buetow
+ */
+public class VSCreateTask {
+    /** The event classname. */
+    private String eventClassname;
+
+    /** The create task menu string. */
+    private String menuText;
+
+    /** The protocol classname. */
+    private String protocolClassname;
+
+    /** The shortname. */
+    private String shortname;
+
+    /** The task is a protocol activation. */
+    private boolean isProtocolActivation;
+
+    /** The task is a protocol deactivation. */
+    private boolean isProtocolDeactivation;
+
+    /** The task is a client protocol. */
+    private boolean isClientProtocol;
+
+    /** True, if the task is a client request. false, if the task is a
+     * server request
+     */
+    private boolean isRequest;
+
+    /**
+     * Instantiates a new VSCreateTask object.
+     *
+     * @param menuText the menu text
+     * @param eventClassname the event classname
+     */
+    public VSCreateTask(String menuText, String eventClassname) {
+        this.menuText = menuText;
+        this.eventClassname = eventClassname;
+    }
+
+    /**
+     * Instantiates a new VSCreateTask dummy object.
+     *
+     * @param menuText the menu text
+     */
+    public VSCreateTask(String menuText) {
+        this.menuText = menuText;
+        this.eventClassname = null;
+    }
+
+    /**
+     * Sets if it is  a protocol activation task.
+     *
+     * @param isProtocolActivation true, if it is a protocol activation
+     *	task.
+     */
+    public void isProtocolActivation(boolean isProtocolActivation) {
+        this.isProtocolActivation = isProtocolActivation;
+
+        if (isProtocolActivation)
+            isProtocolDeactivation(false);
+    }
+
+    /**
+     * Sets if it is  a protocol deactivation task.
+     *
+     * @param isProtocolDeactivation true, if it is a protocol deactivation
+     *	task.
+     */
+    public void isProtocolDeactivation(boolean isProtocolDeactivation) {
+        this.isProtocolDeactivation = isProtocolDeactivation;
+
+        if (isProtocolDeactivation)
+            isProtocolActivation(false);
+    }
+
+    /**
+     * Sets if it is a client protocol.
+     *
+     * @param isClientProtocol the is client protocol
+     */
+    public void isClientProtocol(boolean isClientProtocol) {
+        this.isClientProtocol = isClientProtocol;
+    }
+
+    /**
+     * Sets if it is a client request.
+     *
+     * @param isRequest the is client request
+     */
+    public void isRequest(boolean isRequest) {
+        this.isRequest = isRequest;
+    }
+
+    /**
+     * Checks if it is a dummy object..
+     *
+     * @return true, if dummy
+     */
+    public boolean isDummy() {
+        return eventClassname == null;
+    }
+
+    /**
+     * Sets the protocol classname.
+     *
+     * @param protocolClassname the protocol classname
+     */
+    public void setProtocolClassname(String protocolClassname) {
+        this.protocolClassname = protocolClassname;
+    }
+
+    /**
+     * Sets the shortname.
+     *
+     * @param shortname the shortname
+     */
+    public void setShortname(String shortname) {
+        this.shortname = shortname;
+    }
+
+    /**
+     * Gets the create tasks menu text.
+     *
+     * @return The text
+     */
+    public String getMenuText() {
+        return menuText;
+    }
+
+    /**
+     * Creates the task.
+     *
+     * @param process the process
+     * @param time the time
+     * @param localTimedTask the local timed task
+     *
+     * @return the new task
+     */
+    public VSTask createTask(VSInternalProcess process, long time,
+                             boolean localTimedTask) {
+        VSAbstractEvent event = null;
+
+        if (isRequest) {
+            event = process.getProtocolObject(eventClassname);
+
+        } else {
+            event = VSRegisteredEvents.createEventInstanceByClassname(
+                        eventClassname, process);
+        }
+
+        event.init(process);
+        if (shortname != null)
+            event.setShortname(shortname);
+
+        if (isProtocolActivation || isProtocolDeactivation) {
+            VSProtocolEvent protocolEvent = (VSProtocolEvent) event;
+            protocolEvent.setProtocolClassname(protocolClassname);
+            protocolEvent.isProtocolActivation(isProtocolActivation);
+            protocolEvent.isClientProtocol(isClientProtocol);
+        }
+
+        return new VSTask(time, process, event, localTimedTask);
+    }
+}
+
diff --git a/src/main/java/simulator/VSLogging.java b/src/main/java/simulator/VSLogging.java
new file mode 100644
index 0000000..66cb563
--- /dev/null
+++ b/src/main/java/simulator/VSLogging.java
@@ -0,0 +1,201 @@
+package simulator;
+
+import java.util.ArrayList;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+
+import javax.swing.JTextArea;
+
+import utils.VSTools;
+
+/**
+ * The class VSLogging, an object of this class is responsible for the loging
+ * of text messages into the simulator's loging window.
+ *
+ * @author Paul C. Buetow
+ */
+public class VSLogging {
+    /** The loging area. */
+    private JTextArea logingArea;
+
+    /** The filter text. */
+    private String filterText;
+
+    /** The pause lines. Used for cacheing the loging if the loging is
+     * deactivated for a while
+     */
+    private ArrayList<StringBuffer> pauseLines;
+
+    /** The loging lines. */
+    private ArrayList<StringBuffer> logingLines;
+
+    /** The simulator canvas. */
+    private VSSimulatorVisualization simulatorVisualization;
+
+    /** The loging messages are filtered. */
+    private boolean isFiltered;
+
+    /** The loging is paused. */
+    private boolean isPaused;
+
+    /** The filter pattern. */
+    private Pattern filterPattern;
+
+    /**
+     * Instantiates a new VSLogging object.
+     */
+    public VSLogging() {
+        logingArea = new JTextArea(0, 0);
+        logingArea.setEditable(false);
+        logingArea.setLineWrap(true);
+        logingArea.setWrapStyleWord(true);
+        logingLines = new ArrayList<StringBuffer>();
+        pauseLines = new ArrayList<StringBuffer>();
+        filterText = "";
+    }
+
+    /**
+     * Sets the simulator canvas.
+     *
+     * @param sv the simulator canvas
+     */
+    public void setSimulatorCanvas(VSSimulatorVisualization sv) {
+        this.simulatorVisualization = sv;
+    }
+
+    /**
+     * Gets the loging area.
+     *
+     * @return the loging area
+     */
+    public JTextArea getLoggingArea() {
+        return logingArea;
+    }
+
+    /**
+     * Loggs a message using the global time.
+     *
+     * @param message the message
+     */
+    public void log(String message) {
+        if (simulatorVisualization == null)
+            log(message, 0);
+        else
+            log(message, simulatorVisualization.getTime());
+    }
+
+    /**
+     * Loggs a message using the specified time.
+     *
+     * @param message the message
+     * @param time the time
+     */
+    public synchronized void log(String message, long time) {
+        StringBuffer buffer = new StringBuffer();
+        buffer.append(VSTools.getTimeString(time));
+        buffer.append(": ");
+        buffer.append(message);
+
+        if (isPaused)
+            pauseLines.add(buffer);
+        else
+            logFiltered(buffer);
+    }
+
+    /**
+     * Sets if the loging is paused.
+     *
+     * @param isPaused true, if the loging is paused
+     */
+    public synchronized void isPaused(boolean isPaused) {
+        this.isPaused = isPaused;
+
+        if (!isPaused) {
+            for (StringBuffer buffer : pauseLines)
+                logFiltered(buffer);
+
+            pauseLines.clear();
+        }
+    }
+
+    /**
+     * If the loging is filtered, it's using the pattern matching.
+     *
+     * @param buffer the loging buffer to filter
+     */
+    private void logFiltered(StringBuffer buffer) {
+        logingLines.add(buffer);
+        if (!isFiltered) {
+            logingArea.append(buffer.toString()+"\n");
+            logingArea.setCaretPosition(
+                logingArea.getDocument().getLength());
+
+        } else if (filterPattern != null &&
+                   filterPattern.matcher(buffer).find()) {
+            logingArea.append(buffer.toString()+"\n");
+            logingArea.setCaretPosition(
+                logingArea.getDocument().getLength());
+        }
+    }
+
+    /**
+     * Checks if the loging is filtered.
+     *
+     * @param isFiltered true, if the loging is filtered
+     */
+    public synchronized void isFiltered(boolean isFiltered) {
+        this.isFiltered = isFiltered;
+
+        if (!isFiltered)
+            setFilterText("");
+        else
+            filter();
+    }
+
+    /**
+     * Sets the filter text.
+     *
+     * @param filterText the new filter text
+     */
+    public synchronized void setFilterText(String filterText) {
+        this.filterText = filterText;
+        filter();
+    }
+
+    /**
+     * Clears the loging.
+     */
+    public synchronized void clear() {
+        logingLines.clear();
+        pauseLines.clear();
+        logingArea.setText("");
+    }
+
+    /**
+     * Filters the loging.
+     */
+    private void filter() {
+        try {
+            filterPattern = Pattern.compile(filterText);
+            StringBuffer buffer = new StringBuffer();
+
+            for (StringBuffer line : logingLines) {
+                if (isFiltered) {
+                    Matcher matcher = filterPattern.matcher(line);
+                    if (matcher.find()) {
+                        buffer.append(line);
+                        buffer.append("\n");
+                    }
+                } else {
+                    buffer.append(line);
+                    buffer.append("\n");
+                }
+            }
+            logingArea.setText(buffer.toString());
+
+        } catch (Exception e) {
+            filterPattern = null;
+            logingArea.setText("");
+        }
+    }
+}
diff --git a/src/main/java/simulator/VSMain.java b/src/main/java/simulator/VSMain.java
new file mode 100644
index 0000000..34a21b7
--- /dev/null
+++ b/src/main/java/simulator/VSMain.java
@@ -0,0 +1,70 @@
+package simulator;
+
+import java.awt.Component;
+import java.util.Locale;
+
+import javax.swing.UIManager;
+
+import events.VSRegisteredEvents;
+import prefs.VSDefaultPrefs;
+import prefs.VSPrefs;
+
+/**
+ * The class VSMain. This class contains the static main method. The simulator
+ * starts here!
+ *
+ * @author Paul C. Buetow
+ */
+public class VSMain {
+    /** The global preferences */
+    public static VSPrefs prefs;
+
+    /**
+     * Instantiates a new VSMain object.
+     *
+     * @param prefs the prefs
+     */
+    public VSMain(VSPrefs prefs) {
+        init(prefs, null);
+    }
+
+    /**
+     * Instantiates a new VSMain object
+     *
+     * @param prefs the prefs
+     * @param relativeTo the component to open the window relative to
+     */
+    public VSMain(VSPrefs prefs, Component relativeTo) {
+        init(prefs, relativeTo);
+    }
+
+    /**
+     * Inits the VSMain object.
+     *
+     * @param prefs the prefs
+     * @param relativeTo the component to open the window relative to
+     */
+    private void init(VSPrefs prefs, Component relativeTo) {
+        //VSSimulatorFrame simulatorFrame =
+        VSMain.prefs = prefs;
+        new VSSimulatorFrame(prefs, relativeTo);
+    }
+
+    /**
+     * The main method.
+     *
+     * @param args the arguments
+     */
+    public static void main(String[] args) {
+        try {
+            UIManager.setLookAndFeel(
+                UIManager.getCrossPlatformLookAndFeelClassName());
+        } catch (Exception e) { }
+
+        Locale.setDefault(Locale.GERMAN);
+        javax.swing.JPopupMenu.setDefaultLightWeightPopupEnabled(false);
+        VSPrefs prefs = VSDefaultPrefs.init();
+        VSRegisteredEvents.init(prefs);
+        new VSMain(prefs);
+    }
+}
diff --git a/src/main/java/simulator/VSMenuItemStates.java b/src/main/java/simulator/VSMenuItemStates.java
new file mode 100644
index 0000000..941dbf5
--- /dev/null
+++ b/src/main/java/simulator/VSMenuItemStates.java
@@ -0,0 +1,109 @@
+package simulator;
+
+/**
+ * The class VSMenuItemStates. Used by the VSSimulator to update the
+ * "simulator" bar of the VSSimulatorFrame.
+ *
+ * @author Paul C. Buetow
+ */
+public class VSMenuItemStates {
+    /** The pause state. */
+    private volatile boolean pause;
+
+    /** The replay state. */
+    private volatile boolean replay;
+
+    /** The reset state. */
+    private volatile boolean reset;
+
+    /** The start state. */
+    private volatile boolean start;
+
+    /**
+     * Instantiates a new VSMenuItemStates object.
+     *
+     * @param pause the pause state
+     * @param replay the replay state
+     * @param reset the reset state
+     * @param start the start state
+     */
+    public VSMenuItemStates(boolean pause, boolean replay, boolean reset,
+                            boolean start) {
+        this.pause = pause;
+        this.replay = replay;
+        this.reset = reset;
+        this.start = start;
+    }
+
+    /**
+     * Sets the pause state.
+     *
+     * @param pause the new pause state
+     */
+    public void setPause(boolean pause) {
+        this.pause = pause;
+    }
+
+    /**
+     * Sets the replay state.
+     *
+     * @param replay the new replay state
+     */
+    public void setReplay(boolean replay) {
+        this.replay = replay;
+    }
+
+    /**
+     * Sets the reset state.
+     *
+     * @param reset the new reset state
+     */
+    public void setReset(boolean reset) {
+        this.reset = reset;
+    }
+
+    /**
+     * Sets the start state.
+     *
+     * @param start the new start state
+     */
+    public void setStart(boolean start) {
+        this.start = start;
+    }
+
+    /**
+     * Gets the pause state.
+     *
+     * @return the pause state
+     */
+    public boolean getPause() {
+        return pause;
+    }
+
+    /**
+     * Gets the replay state.
+     *
+     * @return the replay state
+     */
+    public boolean getReplay() {
+        return replay;
+    }
+
+    /**
+     * Gets the reset state.
+     *
+     * @return the reset state
+     */
+    public boolean getReset() {
+        return reset;
+    }
+
+    /**
+     * Gets the start state.
+     *
+     * @return the start state
+     */
+    public boolean getStart() {
+        return start;
+    }
+}
diff --git a/src/main/java/simulator/VSSimulator.java b/src/main/java/simulator/VSSimulator.java
new file mode 100644
index 0000000..4965a71
--- /dev/null
+++ b/src/main/java/simulator/VSSimulator.java
@@ -0,0 +1,1536 @@
+package simulator;
+
+import java.awt.BorderLayout;
+import java.awt.Color;
+import java.awt.Component;
+import java.awt.Dimension;
+import java.awt.GridBagLayout;
+import java.awt.GridLayout;
+import java.awt.event.ActionEvent;
+import java.awt.event.ActionListener;
+import java.awt.event.MouseEvent;
+import java.awt.event.MouseListener;
+import java.io.IOException;
+import java.io.ObjectInputStream;
+import java.io.ObjectOutputStream;
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.Vector;
+
+import javax.swing.AbstractButton;
+import javax.swing.AbstractCellEditor;
+import javax.swing.BoxLayout;
+import javax.swing.ButtonModel;
+import javax.swing.JButton;
+import javax.swing.JCheckBox;
+import javax.swing.JComboBox;
+import javax.swing.JLabel;
+import javax.swing.JMenuItem;
+import javax.swing.JPanel;
+import javax.swing.JPopupMenu;
+import javax.swing.JScrollPane;
+import javax.swing.JSplitPane;
+import javax.swing.JTabbedPane;
+import javax.swing.JTable;
+import javax.swing.JTextArea;
+import javax.swing.JTextField;
+import javax.swing.ListSelectionModel;
+import javax.swing.SwingUtilities;
+import javax.swing.event.ChangeEvent;
+import javax.swing.event.ChangeListener;
+import javax.swing.event.DocumentEvent;
+import javax.swing.event.DocumentListener;
+import javax.swing.table.AbstractTableModel;
+import javax.swing.table.TableCellEditor;
+import javax.swing.table.TableColumn;
+
+import core.VSInternalProcess;
+import core.VSTask;
+import core.VSTaskManager;
+import events.VSRegisteredEvents;
+import exceptions.VSNegativeNumberException;
+import prefs.VSPrefs;
+import prefs.editors.VSProcessEditor;
+import serialize.VSSerializable;
+import serialize.VSSerialize;
+
+/**
+ * The class VSSimulator, an object of this class represents a whole simulator.
+ * It may be, that several parallel simulators exist. They are independent
+ * fron each other.
+ *
+ * @author Paul C. Buetow
+ */
+public class VSSimulator extends JPanel implements VSSerializable {
+    /** The serial version uid */
+    private static final long serialVersionUID = 1L;
+
+    /** The global text fields. */
+    private ArrayList<String> globalTextFields;
+
+    /** The local text fields. */
+    private ArrayList<String> localTextFields;
+
+    /** The create tasks array list. */
+    private ArrayList<VSCreateTask> createTasks;
+
+    /** The filter active check box. */
+    private JCheckBox filterActiveCheckBox;
+
+    /** The lamport active check box. */
+    private JCheckBox lamportActiveCheckBox;
+
+    /** The vector time active check box. */
+    private JCheckBox vectorTimeActiveCheckBox;
+
+    /** The global pid combo box. */
+    private JComboBox<String> globalPIDComboBox;
+
+    /** The local pid combo box. */
+    private JComboBox<String> localPIDComboBox;
+
+    /** The processes combo box. */
+    private JComboBox<String> processesComboBox;
+
+    /** The local add panel. */
+    private JPanel localAddPanel;
+
+    /** The local panel. */
+    private JPanel localPanel;
+
+    /** The loging panel. */
+    private JPanel logingPanel;
+
+    /** The split pane1. */
+    private JSplitPane splitPane1;
+
+    /** The split pane h. */
+    private JSplitPane splitPaneH;
+
+    /** The split pane v. */
+    private JSplitPane splitPaneV;
+
+    /** The tabbed pane. */
+    private JTabbedPane tabbedPane;
+
+    /** The loging area. */
+    private JTextArea logingArea;
+
+    /** The filter text field. */
+    private JTextField filterTextField;
+
+    /** The global text field. */
+    private JTextField globalTextField;
+
+    /** The local text field. */
+    private JTextField localTextField;
+
+    /** The thread. */
+    private Thread thread;
+
+    /** The loging. */
+    private VSLogging loging;
+
+    /** The menu item states. */
+    private VSMenuItemStates menuItemStates;
+
+    /** The prefs. */
+    private VSPrefs prefs;
+
+    /** The simulator canvas. */
+    private VSSimulatorVisualization simulatorVisualization;
+
+    /** The simulator frame. */
+    private VSSimulatorFrame simulatorFrame;
+
+    /** The task manager. */
+    private VSTaskManager taskManager;
+
+    /** The task manager global model. */
+    private VSTaskManagerTableModel taskManagerGlobalModel;
+
+    /** The task manager local model. */
+    private VSTaskManagerTableModel taskManagerLocalModel;
+
+    /** The task manager global editor. */
+    private VSTaskManagerCellEditor taskManagerGlobalEditor;
+
+    /** The task manager local editor. */
+    private VSTaskManagerCellEditor taskManagerLocalEditor;
+
+    /** The last selected process num. */
+    private int lastSelectedProcessNum;
+
+    /** The last expert state. */
+    private boolean lastExpertState;
+
+    /** The simulator counter. */
+    private static int simulatorCounter;
+
+    /** The simulator num. */
+    private static volatile int simulatorNum;
+
+    /**
+     * The class VSTaskManagerTableModel, an object of this class handles
+     * the task manager's JTable.
+     */
+    private class VSTaskManagerTableModel extends AbstractTableModel
+        implements MouseListener {
+        /** the serial version uid */
+        private static final long serialVersionUID = 1l;
+
+        /** The Constant LOCAL. */
+        public static final boolean LOCAL = true;
+
+        /** The Constant GLOBAL. */
+        public static final boolean GLOBAL = false;
+
+        /** The Constant ALL_PROCESSES. */
+        // public static final boolean ALL_PROCESSES = true;
+
+        /** The Constant ONE_PROCESS. */
+        public static final boolean ONE_PROCESS = false;
+
+        /** The tasks. */
+        private ArrayList<VSTask> tasks;
+
+        /** The column names. */
+        private String columnNames[];
+
+        /** The num columns. */
+        private int numColumns;
+
+        /** The table. */
+        //private JTable table;
+
+        /** The editor. */
+        //private VSTaskManagerCellEditor editor;
+
+        /**
+         * Instantiates a new VSTaskManagerTableModel object
+         *
+         * @param process the process
+         * @param localTask true, if this table manages the local task. false,
+         *	if this table manages the global tasks.
+         */
+        public VSTaskManagerTableModel(VSInternalProcess process,
+                                       boolean localTask) {
+            tasks = new ArrayList<VSTask>();
+            set(process, localTask, ONE_PROCESS);
+            columnNames = new String[3];
+            columnNames[0]= prefs.getString("lang.time") + " (ms)";
+            columnNames[1] = prefs.getString("lang.process.id");
+            columnNames[2] = prefs.getString("lang.event");
+            numColumns = 3;
+        }
+
+        /**
+         * Sets the table.
+         *
+         * @param table the table
+         */
+        public void setTable(JTable table) {
+            /* Maybe needed for future usage */
+            //this.table = table;
+        }
+
+        /**
+         * Sets the editor.
+         *
+         * @param editor the editor
+         */
+        public void setEditor(VSTaskManagerCellEditor editor) {
+            /* Maybe needed for future usage */
+            //this.editor = editor;
+        }
+
+        /**
+         * Sets new values.
+         *
+         * @param process the process
+         * @param localTasks true, if this table manages the local tasks. false
+         *	if this table manages the global tasks.
+         * @param allProcesses true, if this table shows tasks of all processes.
+         *	false, if this table only shows tasks of the specified process.
+         */
+        public void set(VSInternalProcess process, boolean localTasks,
+                        boolean allProcesses) {
+
+            if (allProcesses) {
+                this.tasks = localTasks
+                             ?  taskManager.getLocalTasks()
+                             :  taskManager.getGlobalTasks();
+            } else {
+                this.tasks = localTasks
+                             ?  taskManager.getProcessLocalTasks(process)
+                             :  taskManager.getProcessGlobalTasks(process);
+            }
+
+            Collections.sort(tasks);
+            fireTableDataChanged();
+        }
+
+        /* (non-Javadoc)
+         * @see javax.swing.table.AbstractTableModel#getColumnName(int)
+         */
+        public String getColumnName(int col) {
+            return columnNames[col];
+        }
+
+        /* (non-Javadoc)
+         * @see javax.swing.table.TableModel#getRowCount()
+         */
+        public int getRowCount() {
+            return tasks == null ? 0 : tasks.size();
+        }
+
+        /* (non-Javadoc)
+         * @see javax.swing.table.TableModel#getColumnCount()
+         */
+        public int getColumnCount() {
+            return numColumns;
+        }
+
+        /* (non-Javadoc)
+         * @see javax.swing.table.TableModel#getValueAt(int, int)
+         */
+        public Object getValueAt(int row, int col) {
+            VSTask task = tasks.get(row);
+
+            switch (col) {
+            case 0:
+                return task.getTaskTime();
+            case 1:
+                return task.getProcess().getProcessID();
+            }
+
+            return task.getEvent().getShortname();
+        }
+
+        /* (non-Javadoc)
+         * @see javax.swing.table.AbstractTableModel#isCellEditable(int, int)
+         */
+        public boolean isCellEditable(int row, int col) {
+            if (col == 2)
+                return false;
+
+            return true;
+        }
+
+        /* (non-Javadoc)
+         * @see javax.swing.table.AbstractTableModel#setValueAt(
+         *	java.lang.Object, int, int)
+         */
+        public void setValueAt(Object value, int row, int col) {
+        }
+
+        /**
+         * Adds the task.
+         *
+         * @param task the task
+         */
+        public void addTask(VSTask task) {
+            tasks.add(task);
+            Collections.sort(tasks);
+            fireTableDataChanged();
+        }
+
+        /**
+         * Removes the task at a specified row.
+         *
+         * @param row the row
+         * @return The removed task
+         */
+        public VSTask removeTaskAtRow(int row) {
+            VSTask task = tasks.get(row);
+            tasks.remove(task);
+            taskManager.removeTask(task);
+            fireTableDataChanged();
+            return task;
+        }
+
+        /**
+         * Checks if a specific row exists
+         *
+         * @param row the row
+         * @return True, if the row exists. False, if not
+         */
+        public boolean rowExists(int row) {
+            if (row < 0)
+                return false;
+
+            if (tasks.size() <= row)
+                return false;
+
+            return true;
+        }
+
+        /**
+         * Gets the index of a specific task
+         *
+         * @param task The task
+         * @return The index of the task
+         */
+        public int getIndexOf(VSTask task) {
+            return tasks.indexOf(task);
+        }
+
+        /**
+         * Copies the tasks at a specified rows.
+         *
+         * @param rows the rows
+         */
+        private void copyTasksAtRows(int rows[]) {
+            ArrayList<VSTask> copiedTasks = new ArrayList<VSTask>();
+
+            for (int row : rows)
+                /* Use the copy constructor */
+                copiedTasks.add(new VSTask(tasks.get(row)));
+
+            for (VSTask task : copiedTasks) {
+                taskManager.addTask(task, VSTaskManager.PROGRAMMED);
+                addTask(task);
+            }
+
+            fireTableDataChanged();
+        }
+
+        /* (non-Javadoc)
+         * @see java.awt.event.MouseListener#mouseClicked(
+         *	java.awt.event.MouseEvent)
+         */
+        public void mouseClicked(MouseEvent me) {
+            final JTable source = (JTable) me.getSource();
+            //final int row = source.rowAtPoint(me.getPoint());
+            //final int col = source.columnAtPoint(me.getPoint());
+
+            if (SwingUtilities.isRightMouseButton(me)) {
+                ActionListener actionListener = new ActionListener() {
+                    public void actionPerformed(ActionEvent ae) {
+                        String command = ae.getActionCommand();
+                        int rows[] = source.getSelectedRows();
+
+                        if (command.equals(prefs.getString("lang.remove"))) {
+                            for (int i = rows.length - 1; i >= 0; --i)
+                                removeTaskAtRow(rows[i]);
+
+                        } else if (command.equals(
+                                       prefs.getString("lang.copy"))) {
+                            copyTasksAtRows(rows);
+                        }
+                    }
+                };
+
+                JPopupMenu popup = new JPopupMenu();
+                JMenuItem item = new JMenuItem(prefs.getString("lang.remove"));
+                item.addActionListener(actionListener);
+                popup.add(item);
+
+                item = new JMenuItem(prefs.getString("lang.copy"));
+                item.addActionListener(actionListener);
+                popup.add(item);
+
+                popup.show(me.getComponent(), me.getX(), me.getY());
+            }
+        }
+
+        /* (non-Javadoc)
+         * @see java.awt.event.MouseListener#mouseEntered(
+         *	java.awt.event.MouseEvent)
+         */
+        public void mouseEntered(MouseEvent me) { }
+
+        /* (non-Javadoc)
+         * @see java.awt.event.MouseListener#mouseExited(
+         *	java.awt.event.MouseEvent)
+         */
+        public void mouseExited(MouseEvent me) { }
+
+        /* (non-Javadoc)
+         * @see java.awt.event.MouseListener#mousePressed(
+         *	java.awt.event.MouseEvent)
+         */
+        public void mousePressed(MouseEvent me) { }
+
+        /* (non-Javadoc)
+         * @see java.awt.event.MouseListener#mouseReleased(
+         *	java.awt.event.MouseEvent)
+         */
+        public void mouseReleased(MouseEvent me) { }
+    }
+
+    /**
+     * The class VSTaskManagerCellEditor, an object of this class handles
+     * the task manager's JTable editor
+     */
+    private class VSTaskManagerCellEditor extends AbstractCellEditor
+        implements TableCellEditor {
+        /** the serial version uid */
+        private static final long serialVersionUID = 1L;
+
+        /** The JTable model */
+        private VSTaskManagerTableModel model;
+
+        /**
+         * Instantiates a new VSTaskManagerCellEditor object.
+         *
+         * @param model the model
+         */
+        public VSTaskManagerCellEditor(VSTaskManagerTableModel model) {
+            this.model = model;
+            model.setEditor(this);
+        }
+
+        /**
+         * Stops editing
+         */
+        public void stopEditing() {
+            fireEditingStopped();
+        }
+
+        /**
+        /* (non-Javadoc)
+         * @see javax.swing.table.TableCellEditor#getTableCellEditorComponent(
+         *      javax.swing.JTable, java.lang.Object, boolean, int, int)
+         */
+        public Component getTableCellEditorComponent(final JTable table,
+                Object object,
+                boolean isSelected,
+                final int row,
+                final int col) {
+            switch (col) {
+            case 0:
+                Long val = (Long) model.getValueAt(row, col);
+                final JTextField valField = new JTextField(val.toString());
+                valField.setBackground(Color.WHITE);
+                valField.setBorder(null);
+                valField.addActionListener(new ActionListener() {
+                    private boolean isRed = false;
+                    public void actionPerformed(ActionEvent ae) {
+                        try {
+                            Long val = Long.valueOf(valField.getText());
+                            if (val.longValue() < 0)
+                                throw new VSNegativeNumberException();