Class MessageUtil

java.lang.Object
org.apache.derby.shared.common.i18n.MessageUtil

public class MessageUtil extends Object
Class comments here
  • Field Summary

    Fields
    Modifier and Type
    Field
    Description
    private String
    The name of the resource bundle we are using to load messages
    static final Locale
     
  • Constructor Summary

    Constructors
    Constructor
    Description
    MessageUtil(String resourceBundleName)
    Create an instance of MessageUtil with a specific resource bundle.
  • Method Summary

    Modifier and Type
    Method
    Description
    static String
    composeDefaultMessage(String message, Object[] arguments)
    Compose a default message so that the user at least gets *something* useful rather than just a MissingResourceException, which is particularly unhelpful
    private static int
    Count the number of substituation parameters in the message
    static String
    formatMessage(ResourceBundle bundle, String messageId, Object[] arguments, boolean composeDefault)
    Format a message given a resource bundle and a message id.
    getCompleteMessage(String messageID, Object[] args)
    Instance method to get the complete message, using the provided resource bundle name as specified when this instance was constructed If for some reason the message could not be found, we return a default message using the message arguments
    static String
    getCompleteMessage(String messageId, String resourceBundleName, Object[] arguments)
    This is a wrapper for the getCompleteMessage workhorse routine using some obvious defaults, particularly for non-engine subsystems that only ever use the default locale.
    static String
    getCompleteMessage(Locale locale, String resourceBundleName, String messageId, Object[] arguments, boolean composeDefault)
    Generic routine to get a message with any number of arguments.
    getTextMessage(String messageID, Object... args)
    Get a message with default locale.

    Methods inherited from class java.lang.Object

    clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
  • Field Details

    • US

      public static final Locale US
    • resourceBundleName

      private String resourceBundleName
      The name of the resource bundle we are using to load messages
  • Constructor Details

    • MessageUtil

      public MessageUtil(String resourceBundleName)
      Create an instance of MessageUtil with a specific resource bundle. This assumes the default locale, which is just fine for users of this class other than the engine (which potentially has a different locale and a different resource bundle for each invocation of getCompleteMessage().
      Parameters:
      resourceBundleName - The base name of the resource bundle to use.
  • Method Details

    • getTextMessage

      public String getTextMessage(String messageID, Object... args)
      Get a message with default locale.
    • getCompleteMessage

      public String getCompleteMessage(String messageID, Object[] args)
      Instance method to get the complete message, using the provided resource bundle name as specified when this instance was constructed If for some reason the message could not be found, we return a default message using the message arguments
    • getCompleteMessage

      public static String getCompleteMessage(Locale locale, String resourceBundleName, String messageId, Object[] arguments, boolean composeDefault) throws MissingResourceException
      Generic routine to get a message with any number of arguments. Looks in the provided resource bundle for the message, using the specified locale and then the US locale.
      Parameters:
      locale - The locale to use when looking for the message. If the message is not found using this locale, we attempt to find it using the US locale (our default).
      resourceBundleName - The base name for the resource bundle to use.
      messageId - The message identifier for this message
      arguments - The arguments for the message
      composeDefault - If this is true, this method will compose a default message if the message could not be found in the provided resource bundles. If it is false, this method will throw a MissingResourceException if the message could not be found.
      Returns:
      The message for the given message id, with arguments substituted.
      Throws:
      MissingResourceException - If the message could not be found and the composeDefault parameter was set to false.
    • getCompleteMessage

      public static String getCompleteMessage(String messageId, String resourceBundleName, Object[] arguments) throws MissingResourceException
      This is a wrapper for the getCompleteMessage workhorse routine using some obvious defaults, particularly for non-engine subsystems that only ever use the default locale. Get a message using the default locale. If the message is not found with the default locale, use the US locale. Do this both for the common bundle and the parent bundle. If the message is not found in common or in the parent resource bundle, return a default message composed of the message arguments.
      Parameters:
      messageId - The id to use to look up the message
      resourceBundleName - The base name of the resource bundle to use.
      arguments - The arguments to the message
      Throws:
      MissingResourceException
    • formatMessage

      public static String formatMessage(ResourceBundle bundle, String messageId, Object[] arguments, boolean composeDefault)
      Format a message given a resource bundle and a message id.

      The arguments to the messages are passed via an object array. The objects in the array WILL be changed by this class. The caller should NOT get the object back from this array.

      Parameters:
      bundle - The resource bundle to use to look for the message
      messageId - The message id to use for the message
      arguments - The arguments for the message
      composeDefault - Indicates whether a default message should be composed if the message can't be found in the resource bundle.

      If composeDefault is false, this method will throw a MissingResourceException if the message could not be found.

      If composeDefault is true, then if the message id is not found in the given bundle, this method composes and returns as helpful a message as possible in the format "UNKNOWN : [arg1], [arg2], ..."

    • countParams

      private static int countParams(String message)
      Count the number of substituation parameters in the message
    • composeDefaultMessage

      public static String composeDefaultMessage(String message, Object[] arguments)
      Compose a default message so that the user at least gets *something* useful rather than just a MissingResourceException, which is particularly unhelpful
      Parameters:
      message - The message to start with, which often is null
      arguments - The arguments to the message.