Apache Struts 2 Documentation > Home > Guides > Core Developers Guide > Interceptors > Alias Interceptor
Added by digi9ten, last edited by Ted Husted on Sep 10, 2006  (view change)
Content pulled from external source. Click here to refresh.

The aim of this Interceptor is to alias a named parameter to a different named parameter. By acting as the glue between actions sharing similiar parameters (but with different names), it can help greatly with action chaining.

Action's alias expressions should be in the form of #{ "name1" : "alias1", "name2" : "alias2" }. This means that assuming an action (or something else in the stack) has a value for the expression named name1 and the action this interceptor is applied to has a setter named alias1, alias1 will be set with the value from name1.

Parameters

Content pulled from external source. Click here to refresh.

  • aliasesKey (optional) - the name of the action parameter to look for the alias map (by default this is aliases).

Extending the Interceptor

Content pulled from external source. Click here to refresh.

This interceptor does not have any known extension points.

Examples

Content pulled from external source. Click here to refresh.
<action name="someAction" class="com.examples.SomeAction">
    <!-- The value for the foo parameter will be applied as if it were named bar -->
    <param name="aliases">#{ 'foo' : 'bar' }</param>

    <!-- note: the alias interceptor is included with the defaultStack in webwork-default.xml -->
    <interceptor-ref name="alias"/>
    <interceptor-ref name="basicStack"/>
    <result name="success">good_result.ftl</result>
</action>