TextProvider (Struts 2 Core 2.5.8 API)

All Known Subinterfaces:

ResourceBundleTextProvider, ValidatorContext

All Known Implementing Classes:

ActionSupport, CompositeTextProvider, DefaultActionSupport, DefaultTextProvider, DelegatingValidatorContext, TextProviderSupport, VisitorFieldValidator.AppendingValidatorContext
```
public interface TextProvider
```
Provides access to ResourceBundles and their underlying text messages. Implementing classes can delegate TextProviderSupport. Messages will be searched in multiple resource bundles, starting with the one associated with this particular class (action in most cases), continuing to try the message bundle associated with each superclass as well. It will stop once a bundle is found that contains the given text. This gives a cascading style that allow global texts to be defined for an application base class.
You can override LocaleProvider.getLocale() to change the behaviour of how to choose locale for the bundles that are returned. Typically you would use the LocaleProvider interface to get the users configured locale.

When you want to use your own implementation for Struts 2 project you have to define following bean and constant in struts.xml: <bean class="org.demo.MyTextProvider" name="myTextProvider" type="com.opensymphony.xwork2.TextProvider" /> <constant name="struts.xworkTextProvider" value="myTextProvider" />

if you want to also use your implementation for framework's messages define another constant (remember to put into it all framework messages) <constant name="system" value="myTextProvider" />

Take a look on ActionSupport for example TextProvider implementation.

Author:

Jason Carreira, Rainer Hermanns

See Also:
LocaleProvider, TextProviderSupport

Method Summary

Methods
Modifier and Type	Method and Description
`String`	`getText(String key)` Gets a message based on a message key or if no message is found the provided key is returned.
`String`	`getText(String key, List<?> args)` Gets a message based on a key using the supplied args, as defined in `MessageFormat` or the provided key if no message is found.
`String`	`getText(String key, String defaultValue)` Gets a message based on a key, or, if the message is not found, a supplied default value is returned.
`String`	`getText(String key, String[] args)` Gets a message based on a key using the supplied args, as defined in `MessageFormat`, or the provided key if no message is found.
`String`	`getText(String key, String defaultValue, List<?> args)` Gets a message based on a key using the supplied args, as defined in `MessageFormat`, or, if the message is not found, a supplied default value is returned.
`String`	`getText(String key, String defaultValue, List<?> args, ValueStack stack)` Gets a message based on a key using the supplied args, as defined in `MessageFormat`, or, if the message is not found, a supplied default value is returned.
`String`	`getText(String key, String defaultValue, String obj)` Gets a message based on a key using the supplied obj, as defined in `MessageFormat`, or, if the message is not found, a supplied default value is returned.
`String`	`getText(String key, String defaultValue, String[] args)` Gets a message based on a key using the supplied args, as defined in `MessageFormat`, or, if the message is not found, a supplied default value is returned.
`String`	`getText(String key, String defaultValue, String[] args, ValueStack stack)` Gets a message based on a key using the supplied args, as defined in `MessageFormat`, or, if the message is not found, a supplied default value is returned.
`ResourceBundle`	`getTexts()` Get the resource bundle associated with the implementing class (usually an action).
`ResourceBundle`	`getTexts(String bundleName)` Get the named bundle, such as "com/acme/Foo".
`boolean`	`hasKey(String key)` Checks if a message key exists.

- Method Detail
  - hasKey
```
boolean hasKey(String key)
```
    Checks if a message key exists.
    
    Parameters:
    key - message key to check for
    
    Returns:
    boolean true if key exists, false otherwise.
  - getText
```
String getText(String key)
```
    Gets a message based on a message key or if no message is found the provided key is returned.
    
    Parameters:
    key - the resource bundle key that is to be searched for
    
    Returns:
    the message as found in the resource bundle, or the provided key if none is found.
  - getText
```
String getText(String key,
             String defaultValue)
```
    Gets a message based on a key, or, if the message is not found, a supplied default value is returned.
    
    Parameters:
    key - the resource bundle key that is to be searched for
    defaultValue - the default value which will be returned if no message is found
    
    Returns:
    the message as found in the resource bundle, or defaultValue if none is found
  - getText
```
String getText(String key,
             String defaultValue,
             String obj)
```
    Gets a message based on a key using the supplied obj, as defined in MessageFormat, or, if the message is not found, a supplied default value is returned.
    
    Parameters:
    key - the resource bundle key that is to be searched for
    defaultValue - the default value which will be returned if no message is found
    obj - obj to be used in a MessageFormat message
    
    Returns:
    the message as found in the resource bundle, or defaultValue if none is found
  - getText
```
String getText(String key,
             List<?> args)
```
    Gets a message based on a key using the supplied args, as defined in MessageFormat or the provided key if no message is found.
    
    Parameters:
    key - the resource bundle key that is to be searched for
    args - a list args to be used in a MessageFormat message
    
    Returns:
    the message as found in the resource bundle, or the provided key if none is found.
  - getText
```
String getText(String key,
             String[] args)
```
    Gets a message based on a key using the supplied args, as defined in MessageFormat, or the provided key if no message is found.
    
    Parameters:
    key - the resource bundle key that is to be searched for
    args - an array args to be used in a MessageFormat message
    
    Returns:
    the message as found in the resource bundle, or the provided key if none is found.
  - getText
```
String getText(String key,
             String defaultValue,
             List<?> args)
```
    Gets a message based on a key using the supplied args, as defined in MessageFormat, or, if the message is not found, a supplied default value is returned.
    
    Parameters:
    key - the resource bundle key that is to be searched for
    defaultValue - the default value which will be returned if no message is found
    args - a list args to be used in a MessageFormat message
    
    Returns:
    the message as found in the resource bundle, or defaultValue if none is found
  - getText
```
String getText(String key,
             String defaultValue,
             String[] args)
```
    Gets a message based on a key using the supplied args, as defined in MessageFormat, or, if the message is not found, a supplied default value is returned.
    
    Parameters:
    key - the resource bundle key that is to be searched for
    defaultValue - the default value which will be returned if no message is found
    args - an array args to be used in a MessageFormat message
    
    Returns:
    the message as found in the resource bundle, or defaultValue if none is found
  - getText
```
String getText(String key,
             String defaultValue,
             List<?> args,
             ValueStack stack)
```
    Gets a message based on a key using the supplied args, as defined in MessageFormat, or, if the message is not found, a supplied default value is returned. Instead of using the value stack in the ActionContext this version of the getText() method uses the provided value stack.
    
    Parameters:
    key - the resource bundle key that is to be searched for
    defaultValue - the default value which will be returned if no message is found
    args - a list args to be used in a MessageFormat message
    stack - the value stack to use for finding the text
    
    Returns:
    the message as found in the resource bundle, or defaultValue if none is found
  - getText
```
String getText(String key,
             String defaultValue,
             String[] args,
             ValueStack stack)
```
    Gets a message based on a key using the supplied args, as defined in MessageFormat, or, if the message is not found, a supplied default value is returned. Instead of using the value stack in the ActionContext this version of the getText() method uses the provided value stack.
    
    Parameters:
    key - the resource bundle key that is to be searched for
    defaultValue - the default value which will be returned if no message is found
    args - an array args to be used in a MessageFormat message
    stack - the value stack to use for finding the text
    
    Returns:
    the message as found in the resource bundle, or defaultValue if none is found
  - getTexts
```
ResourceBundle getTexts(String bundleName)
```
    Get the named bundle, such as "com/acme/Foo".
    
    Parameters:
    bundleName - the name of the resource bundle, such as "com/acme/Foo".
    
    Returns:
    the bundle
  - getTexts
```
ResourceBundle getTexts()
```
    Get the resource bundle associated with the implementing class (usually an action).
    
    Returns:
    the bundle

Interface TextProvider

Method Summary

Method Detail

hasKey

getText

getText

getText

getText

getText

getText

getText

getText

getText

getTexts

getTexts