Removes special symbols before callng phone numbers and lets the user configure a property to enable/disable this functionality.

resources/languages/resources.properties

@@ -722,6 +722,8 @@ plugin.generalconfig.ERROR_PORT_NUMBER=Wrong port number
 plugin.generalconfig.CHECK_FOR_UPDATES=Check for updates on startup
 plugin.generalconfig.STARTUP_CONFIG=Startup
 plugin.generalconfig.LEAVE_CHATROOM_ON_WINDOW_CLOSE=Leave chat rooms when closing window
+plugin.generalconfig.REMOVE_SPECIAL_PHONE_SYMBOLS=Remove special symbols before callng phone numbers
+plugin.generalconfig.SIP_CALL_CONFIG=SIP configurations
 
 # gibberish accregwizz
 plugin.gibberishaccregwizz.PROTOCOL_NAME=Gibberish

src/net/java/sip/communicator/impl/gui/GuiActivator.java

@@ -80,6 +80,8 @@ public class GuiActivator implements BundleActivator
 
     private static SmiliesReplacementService smiliesService;
 
+    private static PhoneNumberI18nService phoneNumberService;
+
     private static AccountManager accountManager;
 
     private static List<ContactSourceService> contactSources;
@@ -805,6 +807,24 @@ public static SmiliesReplacementService getSmiliesReplacementSource()
         return smiliesService;
     }
 
+    /**
+     * Returns the <tt>PhoneNumberI18nService</tt> obtained from the bundle
+     * context.
+     * 
+     * @return the <tt>PhoneNumberI18nService</tt> implementation obtained
+     * from the bundle context
+     */
+    public static PhoneNumberI18nService getPhoneNumberService()
+    {
+        if (phoneNumberService == null)
+        {
+            phoneNumberService
+                = ServiceUtils.getService(bundleContext,
+                    PhoneNumberI18nService.class);
+        }
+        return phoneNumberService;
+    }
+
     /**
      * Returns the <tt>SecurityAuthority</tt> implementation registered to
      * handle security authority events.

src/net/java/sip/communicator/impl/gui/main/contactlist/SearchFieldUI.java

@@ -15,6 +15,7 @@
 
 import net.java.sip.communicator.impl.gui.*;
 import net.java.sip.communicator.impl.gui.main.call.*;
+import net.java.sip.communicator.impl.gui.utils.*;
 import net.java.sip.communicator.service.protocol.*;
 import net.java.sip.communicator.util.*;
 import net.java.sip.communicator.util.skin.*;
@@ -276,7 +277,20 @@ private void updateCallIcon(MouseEvent evt)
             if (searchText == null)
                 return;
 
-            searchText = GuiUtils.formatCallString(searchText);
+            if (ConfigurationManager.isNormalizePhoneNumber())
+            {
+                if (!StringUtils.containsLetters(searchText)
+                        && GuiActivator.getPhoneNumberService()
+                            .isPhoneNumber(searchText))
+                {
+                    searchText = GuiActivator.getPhoneNumberService()
+                        .normalize(searchText);
+                }
+                else
+                {
+                    searchText = StringUtils.concatenateWords(searchText);
+                }
+            }
 
             // Show a tool tip over the call button.
             getComponent().setToolTipText(callString + " " + searchText);

src/net/java/sip/communicator/impl/gui/utils/ConfigurationManager.java

@@ -737,6 +737,19 @@ public static String getSendFileLastDir()
         return sendFileLastDir;
     }
 
+    /**
+     * Returns <code>true</code> if phone numbers should be normalized,
+     * <code>false</code> otherwise.
+     * 
+     * @return <code>true</code> if phone numbers should be normalized,
+     * <code>false</code> otherwise.
+     */
+    public static boolean isNormalizePhoneNumber()
+    {
+        return configService.getBoolean(
+            "impl.gui.NORMALIZE_PHONE_NUMBER", true);
+    }
+
     /**
      * Sets the transparency value for all transparent windows.
      * 

src/net/java/sip/communicator/plugin/addrbook/PhoneNumberI18nServiceImpl.java

@@ -88,4 +88,40 @@ public boolean phoneNumbersMatch(String aPhoneNumber, String bPhoneNumber)
             throw new IllegalArgumentException(npex);
         }
     }
+
+    public boolean isNumber(String possibleNumber)
+    {
+        PhoneNumberUtil numberUtil = PhoneNumberUtil.getInstance();
+        try
+        {
+            if (numberUtil.isPossibleNumber(possibleNumber, null))
+                return true;
+            else
+                return numberUtil.isPossibleNumber(
+                    numberUtil.parse(   possibleNumber,
+                                        Locale.getDefault().getCountry()));
+        }
+        catch (NumberParseException e)
+        {
+            return false;
+        }
+    }
+
+    public boolean isPhoneNumber(String possibleNumber)
+    {
+        PhoneNumberUtil numberUtil = PhoneNumberUtil.getInstance();
+        try
+        {
+            if (numberUtil.isPossibleNumber(possibleNumber, null))
+                return true;
+            else
+                return numberUtil.isPossibleNumber(
+                    numberUtil.parse(   possibleNumber,
+                                        Locale.getDefault().getCountry()));
+        }
+        catch (NumberParseException e)
+        {
+            return false;
+        }
+    }
 }

src/net/java/sip/communicator/plugin/generalconfig/ConfigurationManager.java

@@ -15,32 +15,37 @@
 public class ConfigurationManager
 {
     public static final String ENTER_COMMAND = "Enter";
-    
+
     public static final String CTRL_ENTER_COMMAND = "Ctrl-Enter";
-    
+
     /**
      * Indicates whether the message automatic popup is enabled.
      */
     private static boolean autoPopupNewMessage;
-    
+
     private static String sendMessageCommand;
-    
+
     private static boolean isSendTypingNotifications;
-    
+
     private static boolean isMultiChatWindowEnabled;
 
     private static boolean isLeaveChatRoomOnWindowCloseEnabled;
-    
+
     private static boolean isHistoryLoggingEnabled;
-    
+
     private static boolean isHistoryShown;
-    
+
     private static int chatHistorySize;
-    
+
     private static int windowTransparency;
-    
+
     private static boolean isTransparentWindowEnabled;
 
+    /**
+     * Indicates if phone numbers should be normalized before dialed.
+     */
+    private static boolean isNormalizePhoneNumber;
+
     private static ConfigurationService configService
         = GeneralConfigPluginActivator.getConfigurationService();
 
@@ -52,12 +57,12 @@ public static void loadGuiConfigurations()
         // Load the "auPopupNewMessage" property.
         String autoPopupProperty = 
             "service.gui.AUTO_POPUP_NEW_MESSAGE";
-        
+
         String autoPopup = configService.getString(autoPopupProperty);
 
         if(autoPopup == null)
             autoPopup = Resources.getSettingsString(autoPopupProperty);
-        
+
         if(autoPopup != null && autoPopup.equalsIgnoreCase("yes"))
             autoPopupNewMessage = true;
 
@@ -65,7 +70,7 @@ public static void loadGuiConfigurations()
         String messageCommandProperty = 
             "service.gui.SEND_MESSAGE_COMMAND";
         String messageCommand = configService.getString(messageCommandProperty);
-        
+
         if(messageCommand == null)
             messageCommand = 
                 Resources.getSettingsString(messageCommandProperty);
@@ -134,11 +139,11 @@ public static void loadGuiConfigurations()
         // Load the "isHistoryLoggingEnabled" property.
         String isHistoryLoggingEnabledPropertyString =
             "impl.msghistory.IS_MESSAGE_HISTORY_ENABLED";
-        
+
         String isHistoryLoggingEnabledString
             = configService.getString(
             isHistoryLoggingEnabledPropertyString);
-        
+
         if(isHistoryLoggingEnabledString == null)
             isHistoryLoggingEnabledString = 
                 Resources.
@@ -151,14 +156,14 @@ public static void loadGuiConfigurations()
                 = new Boolean(isHistoryLoggingEnabledString)
                 .booleanValue();
         }
-        
+
         // Load the "isHistoryShown" property.
         String isHistoryShownStringProperty = 
             "service.gui.IS_MESSAGE_HISTORY_SHOWN";
-        
+
         String isHistoryShownString
             = configService.getString(isHistoryShownStringProperty);
-        
+
         if(isHistoryShownString == null)
             isHistoryShownString = 
                 Resources.getSettingsString(isHistoryShownStringProperty);
@@ -223,6 +228,14 @@ public static void loadGuiConfigurations()
             windowTransparency
                 = Integer.parseInt(windowTransparencyString);
         }
+
+        // Load the "NORMALIZE_PHONE_NUMBER" property.
+        String normalizePhoneNumberProperty =
+            "impl.gui.NORMALIZE_PHONE_NUMBER";
+
+        isNormalizePhoneNumber
+            = GeneralConfigPluginActivator.getConfigurationService()
+                .getBoolean(normalizePhoneNumberProperty, true);
     }
 
     /**
@@ -364,6 +377,32 @@ public static void setTransparentWindowEnabled(
             new Boolean(isTransparentWindowEnabled).toString());
     }
 
+    /**
+     * Returns <code>true</code> if phone numbers should be normalized,
+     * <code>false</code> otherwise.
+     * 
+     * @return <code>true</code> if phone numbers should be normalized,
+     * <code>false</code> otherwise.
+     */
+    public static boolean isNormalizePhoneNumber()
+    {
+        return isNormalizePhoneNumber;
+    }
+
+    /**
+     * Updates the "NORMALIZE_PHONE_NUMBER" property.
+     *
+     * @param isNormalize indicates to the user interface whether all dialed
+     * phone numbers should be normalized
+     */
+    public static void setNormalizePhoneNumber(boolean isNormalize)
+    {
+        ConfigurationManager.isNormalizePhoneNumber = isNormalize;
+
+        configService.setProperty("impl.gui.NORMALIZE_PHONE_NUMBER",
+            Boolean.toString(isNormalize));
+    }
+
     /**
      * Returns the transparency value for all transparent windows.
      * 
@@ -374,6 +413,12 @@ public static int getWindowTransparency()
         return windowTransparency;
     }
 
+    /**
+     * Updates the "WINDOW_TRANSPARENCY" property.
+     * 
+     * @param windowTransparency indicates to the user interface what is the
+     * window transparency value
+     **/
     public static void setWindowTransparency(int windowTransparency)
     {
         ConfigurationManager.windowTransparency = windowTransparency;

src/net/java/sip/communicator/plugin/generalconfig/GeneralConfigPluginActivator.java

@@ -102,13 +102,27 @@ public void start(BundleContext bc)
             .registerService(
                 ConfigurationForm.class.getName(),
                 new LazyConfigurationForm(
-                    "net.java.sip.communicator.plugin.generalconfig.GeneralConfigurationPanel",
+                    "net.java.sip.communicator.plugin." +
+                    "generalconfig.GeneralConfigurationPanel",
                     getClass().getClassLoader(),
                     "plugin.generalconfig.PLUGIN_ICON",
                     "service.gui.GENERAL",
                     0),
                 properties);
 
+        // Registers the sip config panel as advanced configuration form.
+        properties.put( ConfigurationForm.FORM_TYPE,
+                        ConfigurationForm.ADVANCED_TYPE);
+        bundleContext.registerService(
+            ConfigurationForm.class.getName(),
+            new LazyConfigurationForm(
+                SIPConfigForm.class.getName(),
+                getClass().getClassLoader(),
+                null,
+                "plugin.generalconfig.SIP_CALL_CONFIG",
+                51, true),
+            properties);
+
         /*
          * Wait for the first ProtocolProviderService to register in order to
          * start the auto-away functionality i.e. to call #startThread().

src/net/java/sip/communicator/plugin/generalconfig/GeneralConfigurationPanel.java

@@ -79,7 +79,7 @@ public GeneralConfigurationPanel()
         mainPanel.add(new JSeparator());
         mainPanel.add(Box.createVerticalStrut(10));
 
-        mainPanel.add(createSipConfigPanel());
+        mainPanel.add(createCallConfigPanel());
         mainPanel.add(Box.createVerticalStrut(10));
     }
 
@@ -596,10 +596,11 @@ public void actionPerformed(ActionEvent e)
     }
 
     /**
-     * Initializes the sip port configuration panel.
-     * @return the created panel
+     * Creates the call configuration panel.
+     *
+     * @return the call configuration panel
      */
-    private Component createSipConfigPanel()
+    private Component createCallConfigPanel()
     {
         JPanel callConfigPanel = new TransparentPanel(new BorderLayout());
 
@@ -608,120 +609,51 @@ private Component createSipConfigPanel()
                 Resources.getString("service.gui.CALL") + ":"),
             BorderLayout.WEST);
 
-        TransparentPanel sipClientPortConfigPanel = new TransparentPanel();
-        sipClientPortConfigPanel.setLayout(new BorderLayout(10, 10));
-        sipClientPortConfigPanel.setPreferredSize(new Dimension(250, 72));
+        callConfigPanel.add(createNormalizeNumberCheckBox());
 
-        callConfigPanel.add(sipClientPortConfigPanel);
+        return callConfigPanel;
+    }
 
-        TransparentPanel labelPanel
-            = new TransparentPanel(new GridLayout(0, 1, 2, 2));
-        TransparentPanel valuePanel
-            = new TransparentPanel(new GridLayout(0, 1, 2, 2));
+    /**
+     * Creates the normalized phone number check box.
+     *
+     * @return the created component
+     */
+    private Component createNormalizeNumberCheckBox()
+    {
+        JPanel checkBoxPanel = new TransparentPanel(new BorderLayout());
 
-        sipClientPortConfigPanel.add(labelPanel,
-            BorderLayout.WEST);
-        sipClientPortConfigPanel.add(valuePanel,
-            BorderLayout.CENTER);
+        JCheckBox formatPhoneNumber = new JCheckBox("",
+            ConfigurationManager.isNormalizePhoneNumber());
 
-        labelPanel.add(new JLabel(
-            Resources.getString(
-                "plugin.generalconfig.SIP_CLIENT_PORT")));
-        labelPanel.add(new JLabel(
-            Resources.getString(
-                "plugin.generalconfig.SIP_CLIENT_SECURE_PORT")));
+        formatPhoneNumber.setAlignmentY(Component.TOP_ALIGNMENT);
 
-        TransparentPanel emptyPanel = new TransparentPanel();
-        emptyPanel.setMaximumSize(new Dimension(40, 35));
-        labelPanel.add(emptyPanel);
-
-        final JTextField clientPortField = new JTextField(6);
-        clientPortField.setText(
-            String.valueOf(ConfigurationManager.getClientPort()));
-        valuePanel.add(clientPortField);
-        clientPortField.addFocusListener(new FocusListener()
+        formatPhoneNumber.addActionListener(new ActionListener()
         {
-            private String oldValue = null;
-
-            public void focusLost(FocusEvent e)
-            {
-                try
-                {
-                    int port =
-                        Integer.valueOf(clientPortField.getText());
-
-                    if(port <= 0 || port > 65535)
-                        throw new NumberFormatException(
-                            "Not a port number");
-
-                    ConfigurationManager.setClientPort(port);
-                }
-                catch (NumberFormatException ex)
-                {
-                    // not a number for port
-                    String error =
-                        Resources.getString(
-                            "plugin.generalconfig.ERROR_PORT_NUMBER");
-                    GeneralConfigPluginActivator.getUIService().
-                    getPopupDialog().showMessagePopupDialog(
-                        error,
-                        error,
-                        PopupDialog.ERROR_MESSAGE);
-                    clientPortField.setText(oldValue);
-                }
-            }
-
-            public void focusGained(FocusEvent e)
+            public void actionPerformed(ActionEvent e)
             {
-                oldValue = clientPortField.getText();
+                ConfigurationManager.setNormalizePhoneNumber(
+                        ((JCheckBox)e.getSource()).isSelected());
             }
         });
 
-        final JTextField clientSecurePortField = new JTextField(6);
-        clientSecurePortField.setText(
-            String.valueOf(ConfigurationManager.getClientSecurePort()));
-        valuePanel.add(clientSecurePortField);
-        clientSecurePortField.addFocusListener(new FocusListener()
-        {
-            private String oldValue = null;
-
-            public void focusLost(FocusEvent e)
-            {
-                try
-                {
-                    int port =
-                        Integer.valueOf(clientSecurePortField.getText());
+        StyledHTMLEditorPane checkBoxTextLabel = new StyledHTMLEditorPane();
 
-                    if(port <= 0 || port > 65535)
-                        throw new NumberFormatException(
-                            "Not a port number");
+        checkBoxTextLabel.setContentType("text/html");
+        checkBoxTextLabel.appendToEnd(
+            "<html>" + GeneralConfigPluginActivator.getResources().getI18NString(
+                "plugin.generalconfig.REMOVE_SPECIAL_PHONE_SYMBOLS") + "</html>");
 
-                    ConfigurationManager.setClientSecurePort(port);
-                }
-                catch (NumberFormatException ex)
-                {
-                    // not a number for port
-                    String error =
-                        Resources.getString(
-                            "plugin.generalconfig.ERROR_PORT_NUMBER");
-                    GeneralConfigPluginActivator.getUIService().
-                    getPopupDialog().showMessagePopupDialog(
-                        error,
-                        error,
-                        PopupDialog.ERROR_MESSAGE); 
-                    clientSecurePortField.setText(oldValue);
-                }
-            }
+        checkBoxTextLabel.setBorder(
+            BorderFactory.createEmptyBorder(3, 0, 0, 0));
+        checkBoxTextLabel.setOpaque(false);
+        checkBoxTextLabel.setEditable(false);
 
-            public void focusGained(FocusEvent e)
-            {
-                oldValue = clientSecurePortField.getText();
-            }
-        });
+        checkBoxPanel.add(formatPhoneNumber, BorderLayout.WEST);
+        checkBoxPanel.add(checkBoxTextLabel, BorderLayout.CENTER);
 
-        return callConfigPanel;
+        return checkBoxPanel;
     }
-
     /**
      * Initializes the startup config panel.
      * @return the created component

src/net/java/sip/communicator/plugin/generalconfig/SIPConfigForm.java

@@ -0,0 +1,138 @@
+/*
+ * SIP Communicator, the OpenSource Java VoIP and Instant Messaging client.
+ * 
+ * Distributable under LGPL license. See terms of license at gnu.org.
+ */
+package net.java.sip.communicator.plugin.generalconfig;
+
+import java.awt.*;
+import java.awt.event.*;
+
+import javax.swing.*;
+
+import net.java.sip.communicator.service.gui.*;
+import net.java.sip.communicator.util.swing.*;
+
+/**
+ * Implementation of the configuration form.
+ *
+ * @author Damian Minkov
+ */
+public class SIPConfigForm
+    extends TransparentPanel
+{
+    /**
+     * Creates the form.
+     */
+    public SIPConfigForm()
+    {
+        super(new BorderLayout());
+
+        TransparentPanel sipClientPortConfigPanel = new TransparentPanel();
+        sipClientPortConfigPanel.setLayout(new BorderLayout(10, 10));
+        sipClientPortConfigPanel.setPreferredSize(new Dimension(250, 72));
+
+        add(sipClientPortConfigPanel, BorderLayout.NORTH);
+
+        TransparentPanel labelPanel
+            = new TransparentPanel(new GridLayout(0, 1, 2, 2));
+        TransparentPanel valuePanel
+            = new TransparentPanel(new GridLayout(0, 1, 2, 2));
+
+        sipClientPortConfigPanel.add(labelPanel,
+            BorderLayout.WEST);
+        sipClientPortConfigPanel.add(valuePanel,
+            BorderLayout.CENTER);
+
+        labelPanel.add(new JLabel(
+            Resources.getString(
+                "plugin.generalconfig.SIP_CLIENT_PORT")));
+        labelPanel.add(new JLabel(
+            Resources.getString(
+                "plugin.generalconfig.SIP_CLIENT_SECURE_PORT")));
+
+        final JTextField clientPortField = new JTextField(6);
+        clientPortField.setText(
+            String.valueOf(ConfigurationManager.getClientPort()));
+        valuePanel.add(clientPortField);
+        clientPortField.addFocusListener(new FocusListener()
+        {
+            private String oldValue = null;
+
+            public void focusLost(FocusEvent e)
+            {
+                try
+                {
+                    int port =
+                        Integer.valueOf(clientPortField.getText());
+
+                    if(port <= 0 || port > 65535)
+                        throw new NumberFormatException(
+                            "Not a port number");
+
+                    ConfigurationManager.setClientPort(port);
+                }
+                catch (NumberFormatException ex)
+                {
+                    // not a number for port
+                    String error =
+                        Resources.getString(
+                            "plugin.generalconfig.ERROR_PORT_NUMBER");
+                    GeneralConfigPluginActivator.getUIService().
+                    getPopupDialog().showMessagePopupDialog(
+                        error,
+                        error,
+                        PopupDialog.ERROR_MESSAGE);
+                    clientPortField.setText(oldValue);
+                }
+            }
+
+            public void focusGained(FocusEvent e)
+            {
+                oldValue = clientPortField.getText();
+            }
+        });
+
+        final JTextField clientSecurePortField = new JTextField(6);
+        clientSecurePortField.setText(
+            String.valueOf(ConfigurationManager.getClientSecurePort()));
+        valuePanel.add(clientSecurePortField);
+        clientSecurePortField.addFocusListener(new FocusListener()
+        {
+            private String oldValue = null;
+
+            public void focusLost(FocusEvent e)
+            {
+                try
+                {
+                    int port
+                        = Integer.valueOf(clientSecurePortField.getText());
+
+                    if(port <= 0 || port > 65535)
+                        throw new NumberFormatException(
+                            "Not a port number");
+
+                    ConfigurationManager.setClientSecurePort(port);
+                }
+                catch (NumberFormatException ex)
+                {
+                    // not a number for port
+                    String error =
+                        Resources.getString(
+                            "plugin.generalconfig.ERROR_PORT_NUMBER");
+                    GeneralConfigPluginActivator.getUIService().
+                    getPopupDialog().showMessagePopupDialog(
+                        error,
+                        error,
+                        PopupDialog.ERROR_MESSAGE); 
+                    clientSecurePortField.setText(oldValue);
+                }
+            }
+
+            public void focusGained(FocusEvent e)
+            {
+                oldValue = clientSecurePortField.getText();
+            }
+        });
+    }
+}

src/net/java/sip/communicator/service/protocol/PhoneNumberI18nService.java

@@ -37,4 +37,12 @@ public interface PhoneNumberI18nService
      * numbers; otherwise, <tt>false</tt>
      */
     public boolean phoneNumbersMatch(String aPhoneNumber, String bPhoneNumber);
+
+    /**
+     * Indicates if the given string is possibly a phone number.
+     *
+     * @param possibleNumber the string to be verified
+     * @return 
+     */
+    public boolean isPhoneNumber(String possibleNumber);
 }

src/net/java/sip/communicator/util/GuiUtils.java

@@ -327,60 +327,6 @@ public static String formatTime(long time)
         return timeStrBuf.toString();
     }
 
-    /**
-     * Formats the given call string by removing any special characters, such as
-     * intervals and brackets. Dashes are removed from number only strings.
-     *
-     * @param callString a string that would be called
-     * @return the formatted string, ready to be called
-     */
-    public static String formatCallString(String callString)
-    {
-        boolean isDigitsOnly = isDigitsOnly(callString);
-
-        StringBuffer normalizedCallString
-            = new StringBuffer(callString.length());
-        char[] stringAsCharArray = callString.toCharArray();
-
-        for (char character : stringAsCharArray)
-        {
-            if ((character != ' '
-                && character != '('
-                && character != ')')
-                && (!isDigitsOnly || character != '-'))
-            {
-                normalizedCallString.append(character);
-            }
-        }
-
-        return normalizedCallString.toString();
-    }
-
-    /**
-     * Indicates if the given string contains only digits.
-     *
-     * @param s the string to verify
-     * @return <tt>true</tt> if the given string contains only digits or
-     * <tt>false</tt> if the string contains also other characters
-     */
-    public static boolean isDigitsOnly(String s)
-    {
-        char[] stringAsCharArray = s.toCharArray();
-
-        boolean digitsOnly = true;
-        for (char character : stringAsCharArray)
-        {
-            if (character != ' '
-                && character != '('
-                && character != ')'
-                && character != '-'
-                && DIGIT_MAPPINGS.get(Character.toUpperCase(character)) == null)
-                digitsOnly = false;
-        }
-
-        return digitsOnly;
-    }
-
     /**
      * Subtracts the two dates.
      * @param date1 the first date argument

src/net/java/sip/communicator/util/StringUtils.java

@@ -7,7 +7,6 @@
 package net.java.sip.communicator.util;
 
 import java.io.*;
-import java.util.*;
 
 /**
  * Utility class that helps to work with <tt>String</tt> class.
@@ -195,4 +194,44 @@ public static boolean isNumber(String string)
 
         return true;
     }
+
+    /**
+     * Indicates if the given string contains any letters.
+     *
+     * @param string the string to check for letters
+     * @return <tt>true</tt> if the given string contains letters,
+     * <tt>false</tt> - otherwise
+     */
+    public static boolean containsLetters(String string)
+    {
+        for (int i = 0; i < string.length(); i++)
+        {
+            if (Character.isLetter(string.charAt(i)))
+                return true;
+        }
+
+        return false;
+    }
+
+    /**
+     * Removes all spaces from the given string and returns a concatenated
+     * result string.
+     *
+     * @param string the string to concatenate
+     * @return the concatenated string
+     */
+    public static String concatenateWords(String string)
+    {
+        StringBuffer buff = new StringBuffer();
+        char[] stringAsCharArray = string.toCharArray();
+
+        for (char character : stringAsCharArray)
+        {
+            if (character != ' ')
+            {
+                buff.append(character);
+            }
+        }
+        return buff.toString();
+    }
 }