javax.jdo.spi
Class I18NHelper

java.lang.Object
  javax.jdo.spi.I18NHelper

public class I18NHelper
extends java.lang.Object

Helper class for constructing messages from bundles. The intended usage of this class is to construct a new instance bound to a bundle, as in

I18NHelper msg = I18NHelper.getInstance("javax.jdo.Bundle");

This call uses the class loader that loaded the I18NHelper class to find the specified Bundle. The class provides two overloaded getInstance methods allowing to specify a different class loader: getInstance(Class cls) looks for a bundle called "Bundle.properties" located in the package of the specified class object and getInstance(String bundleName,ClassLoader loader) uses the specified class loader to find the bundle.

Subsequently, instance methods can be used to format message strings using the text from the bundle, as in

throw new JDOFatalInternalException (msg.msg("ERR_NoMetadata", cls.getName()));

Since:

1.0.1

Version:

1.1

Method Summary

static I18NHelper	getInstance(java.lang.Class cls) An instance bound to a bundle.
static I18NHelper	getInstance(java.lang.String bundleName) An instance bound to a bundle.
static I18NHelper	getInstance(java.lang.String bundleName, java.lang.ClassLoader loader) An instance bound to a bundle.
java.util.ResourceBundle	getResourceBundle() Returns the resource bundle used by this I18NHelper.
java.lang.String	msg(java.lang.String messageKey) Message formatter
java.lang.String	msg(java.lang.String messageKey, boolean arg) Message formatter
java.lang.String	msg(java.lang.String messageKey, int arg) Message formatter
java.lang.String	msg(java.lang.String messageKey, java.lang.Object arg1) Message formatter
java.lang.String	msg(java.lang.String messageKey, java.lang.Object[] args) Message formatter
java.lang.String	msg(java.lang.String messageKey, java.lang.Object arg1, java.lang.Object arg2) Message formatter
java.lang.String	msg(java.lang.String messageKey, java.lang.Object arg1, java.lang.Object arg2, java.lang.Object arg3) Message formatter

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Detail

getInstance

public static I18NHelper getInstance(java.lang.String bundleName)

An instance bound to a bundle. This method uses the current class loader to find the bundle.

Parameters:

bundleName - the name of the bundle

Returns:

the helper instance bound to the bundle

getInstance

public static I18NHelper getInstance(java.lang.Class cls)

An instance bound to a bundle. This method figures out the bundle name for the class object's package and uses the class' class loader to find the bundle. Note, the specified class object must not be null.

Parameters:

cls - the class object from which to load the resource bundle

Returns:

the helper instance bound to the bundle

getInstance

public static I18NHelper getInstance(java.lang.String bundleName,
                                     java.lang.ClassLoader loader)

An instance bound to a bundle. This method uses the specified class loader to find the bundle. Note, the specified class loader must not be null.

Parameters:

bundleName - the name of the bundle

loader - the class loader from which to load the resource bundle

Returns:

the helper instance bound to the bundle

msg

public java.lang.String msg(java.lang.String messageKey)

Message formatter

Parameters:

messageKey - the message key

Returns:

the resolved message text

msg

public java.lang.String msg(java.lang.String messageKey,
                            java.lang.Object arg1)

Message formatter

Parameters:

messageKey - the message key

arg1 - the first argument

Returns:

the resolved message text

msg

public java.lang.String msg(java.lang.String messageKey,
                            java.lang.Object arg1,
                            java.lang.Object arg2)

Message formatter

Parameters:

messageKey - the message key

arg1 - the first argument

arg2 - the second argument

Returns:

the resolved message text

msg

public java.lang.String msg(java.lang.String messageKey,
                            java.lang.Object arg1,
                            java.lang.Object arg2,
                            java.lang.Object arg3)

Message formatter

Parameters:

messageKey - the message key

arg1 - the first argument

arg2 - the second argument

arg3 - the third argument

Returns:

the resolved message text

msg

public java.lang.String msg(java.lang.String messageKey,
                            java.lang.Object[] args)

Message formatter

Parameters:

messageKey - the message key

args - the array of arguments

Returns:

the resolved message text

msg

public java.lang.String msg(java.lang.String messageKey,
                            int arg)

Message formatter

Parameters:

messageKey - the message key

arg - the argument

Returns:

the resolved message text

msg

public java.lang.String msg(java.lang.String messageKey,
                            boolean arg)

Message formatter

Parameters:

messageKey - the message key

arg - the argument

Returns:

the resolved message text

getResourceBundle

public java.util.ResourceBundle getResourceBundle()

Returns the resource bundle used by this I18NHelper.

Returns:

the associated resource bundle

Since:

1.1