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org.apache.tapestry.callback
Class PageCallback  

java.lang.Object
  org.apache.tapestry.callback.PageCallback

All Implemented Interfaces:

ICallback, java.io.Serializable

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public class PageCallback

extends java.lang.Object

implements ICallback

Simple callback for returning to a page.

Example usage of PageCallback:

The Home page ensure a user is authenticated in the IPage.validate(IRequestCycle)>IPage.validate(IRequestCycle) 55 method. If the user is not authenticated, they are redirected to the Login page, after setting a callback in the Login page.

The Login page formSubmit() org.apache.tapestry.IActionListener authenticates the user and then invokes ICallback.performCallback(IRequestCycle) 55 to the Home page.

  public class Home extends BasePage {
 
      public void validate(IRequestCycle cycle) {            
          Visit visit = (Visit) getVisit();
      
          if (!visit.isAuthenticated()) {
              Login login = (Login) cycle.getPage("Login");

              login.setCallback(new PageCallback(this));
              
              throw new PageRedirectException(login);
          }            
      }
  }

  public Login extends BasePage {
 
      private ICallback _callback;

      public void setCallback(ICallback _callback) {
          _callback = callback;
      }

      public void formSubmit(IRequestCycle cycle) {
          // Authentication code
          ..
   
          Visit visit = (Visit) getVisit();

          visit.setAuthenticated(true);
  
          if (_callback != null) {
              _callback.performCallback(cycle);
          }
      }
  }    
  

Since:

0.2.9

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Field Summary
static com.cortexeb.tools.clover.d	__CLOVER_59_0
private  java.lang.String	_pageName
private static long	serialVersionUID

 

Constructor Summary

PageCallback(org.apache.tapestry.IPage page)

PageCallback(java.lang.String pageName)

 

Method Summary
void	performCallback(org.apache.tapestry.IRequestCycle cycle)           Invokes IRequestCycle.activate(String)>IRequestCycle.activate(String) 55 to select the previously identified page as the response page.
java.lang.String	toString()           Convert this Object to a human-readable String.

 

Methods inherited from class java.lang.Object

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

 

Field Detail

__CLOVER_59_0

public static com.cortexeb.tools.clover.d __CLOVER_59_0

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serialVersionUID

private static final long serialVersionUID

Since:

2.0.4

See Also:

Constant Field Values

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_pageName

private java.lang.String _pageName

Constructor Detail

PageCallback

public PageCallback(java.lang.String pageName)

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PageCallback

public PageCallback(org.apache.tapestry.IPage page)

Method Detail

toString

public java.lang.String toString()

Description copied from class: java.lang.Object

Convert this Object to a human-readable String. There are no limits placed on how long this String should be or what it should contain. We suggest you make it as intuitive as possible to be able to place it into System.out.println() 55 and such.

It is typical, but not required, to ensure that this method never completes abruptly with a java.lang.RuntimeException.

This method will be called when performing string concatenation with this object. If the result is null, string concatenation will instead use "null".

The default implementation returns getClass().getName() + "@" + Integer.toHexString(hashCode()).

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performCallback

public void performCallback(org.apache.tapestry.IRequestCycle cycle)

Invokes IRequestCycle.activate(String)>IRequestCycle.activate(String) 55 to select the previously identified page as the response page.

Specified by:

performCallback in interface ICallback

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