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## com.opensymphony.xwork2.interceptor
Class I18nInterceptor

    java.lang.Object
      com.opensymphony.xwork2.interceptor.AbstractInterceptor
          com.opensymphony.xwork2.interceptor.I18nInterceptor

All Implemented Interfaces:
  Interceptor, Serializable

    public class I18nInterceptor

extends AbstractInterceptor

An interceptor that handles setting the locale specified in a session as the locale for the current action request. In addition, this interceptor will look for a specific HTTP request parameter and set the locale to whatever value is provided. This means that this interceptor can be used to allow for your application to dynamically change the locale for the user's session. This is very useful for applications that require multi-lingual support and want the user to be able to set his or her language preference at any point. The locale parameter is removed during the execution of this interceptor, ensuring that properties aren't set on an action (such as request_locale) that have no typical corresponding setter in your action.

For example, using the default parameter name, a request to foo.action?request_locale=en_US, then the locale for US English is saved in the user's session and will be used for all future requests.

Interceptor parameters:

- parameterName (optional) - the name of the HTTP request parameter that dictates the locale to switch to and save in the session. By default this is request_locale
- attributeName (optional) - the name of the session key to store the selected locale. By default this is WW_TRANS_I18N_LOCALE

Extending the interceptor:

There are no known extensions points for this interceptor.

Example code:

     <action name="someAction" class="com.examples.SomeAction">
         <interceptor-ref name="i18n"/>
         <interceptor-ref name="basicStack"/>
         <result name="success">good_result.ftl</result>
     </action>

Author:
  Aleksei Gopachenko
See Also:
  Serialized Form

Field Summary
`protected String` | `attributeName`
`static String` | `DEFAULT_PARAMETER`
`static String` | `DEFAULT_SESSION_ATTRIBUTE`
`protected static Log` | `log`
`protected String` | `parameterName`

Constructor Summary
`I18nInterceptor()`

Method Summary
`String` | `intercept(ActionInvocation invocation)` Override to handle interception
`protected void` | `saveLocale(ActionInvocation invocation, Locale locale)` Save the given locale to the ActionInvocation.
`void` | `setAttributeName(String attributeName)`
`void` | `setParameterName(String parameterName)`

Methods inherited from class com.opensymphony.xwork2.interceptor.AbstractInterceptor
`destroy, init`

Methods inherited from class java.lang.Object
`clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

Field Detail

### log

    protected static final Log log

### DEFAULT_SESSION_ATTRIBUTE

    public static final String DEFAULT_SESSION_ATTRIBUTE

See Also:
  Constant Field Values

### DEFAULT_PARAMETER

    public static final String DEFAULT_PARAMETER

See Also:
  Constant Field Values

### parameterName

    protected String parameterName

### attributeName

    protected String attributeName

Constructor Detail

### I18nInterceptor

    public I18nInterceptor()

Method Detail

### setParameterName

    public void setParameterName(String parameterName)

### setAttributeName

    public void setAttributeName(String attributeName)

### intercept

    public String intercept(ActionInvocation invocation)
                     throws Exception

  Description copied from class: `AbstractInterceptor`
  Override to handle interception

  Specified by:
    `intercept` in interface `Interceptor`
  Specified by:
    `intercept` in class `AbstractInterceptor`
  Returns:
    the return code, either returned from `ActionInvocation.invoke()`, or from the interceptor itself.
  Throws:
    `Exception` - any system-level error, as defined in `Action.execute()`.

### saveLocale

    protected void saveLocale(ActionInvocation invocation,
                              Locale locale)

  Save the given locale to the ActionInvocation.

  Parameters:
    `invocation` - The ActionInvocation.
    `locale` - The locale to save.

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