org.apache.commons.lang.text
Class ExtendedMessageFormat

java.lang.Object
  java.text.Format
      java.text.MessageFormat
          org.apache.commons.lang.text.ExtendedMessageFormat

All Implemented Interfaces:

Serializable, Cloneable

public class ExtendedMessageFormat
extends MessageFormat

Extends java.text.MessageFormat to allow pluggable/additional formatting options for embedded format elements. Client code should specify a registry of FormatFactory instances associated with String format names. This registry will be consulted when the format elements are parsed from the message pattern. In this way custom patterns can be specified, and the formats supported by java.text.MessageFormat can be overridden at the format and/or format style level (see MessageFormat). A "format element" embedded in the message pattern is specified (()? signifies optionality):
{argument-number(,format-name(,format-style)?)?}

format-name and format-style values are trimmed of surrounding whitespace in the manner of java.text.MessageFormat. If format-name denotes FormatFactory formatFactoryInstance in registry, a Format matching format-name and format-style is requested from formatFactoryInstance. If this is successful, the Format found is used for this format element.

NOTICE: The various subformat mutator methods are considered unnecessary; they exist on the parent class to allow the type of customization which it is the job of this class to provide in a configurable fashion. These methods have thus been disabled and will throw UnsupportedOperationException if called.

Limitations inherited from java.text.MessageFormat:

• When using "choice" subformats, support for nested formatting instructions is limited to that provided by the base class.
• Thread-safety of Formats, including MessageFormat and thus ExtendedMessageFormat, is not guaranteed.

Since:

2.4

Version:

$Id: ExtendedMessageFormat.java 635447 2008-03-10 06:27:09Z bayard $

Author:

Matt Benson, Niall Pemberton

See Also:

Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from class java.text.MessageFormat

MessageFormat.Field

Constructor Summary

ExtendedMessageFormat(String pattern)
Create a new ExtendedMessageFormat for the default locale.

ExtendedMessageFormat(String pattern, Locale locale)
Create a new ExtendedMessageFormat.

ExtendedMessageFormat(String pattern, Locale locale, Map registry)
Create a new ExtendedMessageFormat.

ExtendedMessageFormat(String pattern, Map registry)
Create a new ExtendedMessageFormat for the default locale.

Method Summary

void	applyPattern(String pattern) Apply the specified pattern.
void	setFormat(int formatElementIndex, Format newFormat)
void	setFormatByArgumentIndex(int argumentIndex, Format newFormat)
void	setFormats(Format[] newFormats)
void	setFormatsByArgumentIndex(Format[] newFormats)
String	toPattern()

Methods inherited from class java.text.MessageFormat

clone, equals, format, format, format, formatToCharacterIterator, getFormats, getFormatsByArgumentIndex, getLocale, hashCode, parse, parse, parseObject, setLocale

Methods inherited from class java.text.Format

format, parseObject

Methods inherited from class java.lang.Object

finalize, getClass, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

ExtendedMessageFormat

public ExtendedMessageFormat(String pattern)

Create a new ExtendedMessageFormat for the default locale.

Parameters:

pattern - String

Throws:

IllegalArgumentException - in case of a bad pattern.

ExtendedMessageFormat

public ExtendedMessageFormat(String pattern,
                             Locale locale)

Create a new ExtendedMessageFormat.

Parameters:

pattern - String

locale - Locale

Throws:

IllegalArgumentException - in case of a bad pattern.

ExtendedMessageFormat

public ExtendedMessageFormat(String pattern,
                             Map registry)

Create a new ExtendedMessageFormat for the default locale.

Parameters:

pattern - String

registry - Registry of format factories: Map

Throws:

IllegalArgumentException - in case of a bad pattern.

ExtendedMessageFormat

public ExtendedMessageFormat(String pattern,
                             Locale locale,
                             Map registry)

Create a new ExtendedMessageFormat.

Parameters:

pattern - String

locale - Locale

registry - Registry of format factories: Map

Throws:

IllegalArgumentException - in case of a bad pattern.

Method Detail

toPattern

public String toPattern()

Overrides:

toPattern in class MessageFormat

applyPattern

public final void applyPattern(String pattern)

Apply the specified pattern.

Overrides:

applyPattern in class MessageFormat

Parameters:

pattern - String

setFormat

public void setFormat(int formatElementIndex,
                      Format newFormat)

Overrides:

setFormat in class MessageFormat

Throws:

UnsupportedOperationException

setFormatByArgumentIndex

public void setFormatByArgumentIndex(int argumentIndex,
                                     Format newFormat)

Overrides:

setFormatByArgumentIndex in class MessageFormat

Throws:

UnsupportedOperationException

setFormats

public void setFormats(Format[] newFormats)

Overrides:

setFormats in class MessageFormat

Throws:

UnsupportedOperationException

setFormatsByArgumentIndex

public void setFormatsByArgumentIndex(Format[] newFormats)

Overrides:

setFormatsByArgumentIndex in class MessageFormat

Throws:

UnsupportedOperationException