org.apache.wicket.ajax.attributes

Class CallbackParameter

java.lang.Object

org.apache.wicket.ajax.attributes.CallbackParameter

public class CallbackParameter
extends Object

CallbackParameter is a specification of a parameter that is used in an AJAX callback function. It specifies if and how the parameter is added to the function declaration, if and how it is added to the AJAX callback and what code to use to generate the contents.

Author:

papegaaij

Method Summary

Methods

Modifier and Type	Method and Description
static CallbackParameter	context(String name) Add a parameter to the function declaration.
static CallbackParameter	converted(String name, String code) Add a parameter to the function declaration that is also passed to the AJAX callback, but converted.
static CallbackParameter	explicit(String name) Add a parameter to the function declaration that is also passed to the AJAX callback.
String	getAjaxParameterCode()
String	getAjaxParameterName()
String	getFunctionParameterName()
static CallbackParameter	resolved(String name, String code) Add a parameter to the AJAX callback that is resolved inside the function, it will not be added as function parameter.

Methods inherited from class java.lang.Object

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

Method Detail

context

public static CallbackParameter context(String name)

Add a parameter to the function declaration. This parameter will not be passed to the AJAX callback. For example, the following code:

 getCallbackFunction(context("event"), context("ui"));
 
 

generates a function with two parameters, like function(event, ui) {...}.

Parameters:

name -

Returns:

The parameter

explicit

public static CallbackParameter explicit(String name)

Add a parameter to the function declaration that is also passed to the AJAX callback. For example, the following code:

 getCallbackFunction(explicit("param"));
 
 

generates a function with one parameter, like function(param) {...} where 'param' is passed literally as extra parameter to the AJAX callback.

Parameters:

name -

Returns:

The parameter

resolved

public static CallbackParameter resolved(String name,
                         String code)

Add a parameter to the AJAX callback that is resolved inside the function, it will not be added as function parameter. For example, the following code:

 getCallbackFunction(resolved("param", "global.substring(0, 3)"));
 
 

generates a function without parameters, like function() {...} where the first 3 characters of the global variable 'global' are passed as extra parameter to the AJAX callback under the name 'param'.

Parameters:

name -

code -

Returns:

The parameter

converted

public static CallbackParameter converted(String name,
                          String code)

Add a parameter to the function declaration that is also passed to the AJAX callback, but converted. For example, the following code:

 getCallbackFunction(converted("param", "param.substring(0, 3)"));
 
 

generates a function with one parameter, like function(param) {...} where the first 3 characters of 'param' are passed as extra parameter to the AJAX callback.

Parameters:

name -

code -

Returns:

The parameter

getFunctionParameterName

public String getFunctionParameterName()

Returns:

the name of the parameter to add to the function declaration, or null if no parameter should be added.

getAjaxParameterName

public String getAjaxParameterName()

Returns:

the name of the parameter to add to the AJAX callback, or null if no parameter should be added.

getAjaxParameterCode

public String getAjaxParameterCode()

Returns:

the javascript code to use to fill the parameter for the AJAX callback.