PageCallback (Tapestry API - 5.7.2)

java.lang.Object
- org.apache.tapestry5.PageCallback

All Implemented Interfaces:

Serializable
```
@ImmutableSessionPersistedObject
public class PageCallback
extends Object
implements Serializable
```
A way of capturing the name of a page and the page activation context so that, at a future date, the page can be invoked with that data. This kind of callback is very useful when creating more complicated workflows, where access to a page is "interrupted" with some operation before returning (via a callback) to the original flow. Since the callback is serializable, it can be stored in the session.

Since:

5.2.0

See Also:

Serialized Form

Constructor Summary

Constructors
Constructor	Description
`PageCallback(String pageName)`
`PageCallback(String pageName, String[] activationContext)`
`PageCallback(String pageName, EventContext activationContext)`

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`protected String`	`activationContextDescription()`	Returns the activation context as a string of value separated by slashes.
`String`	`getPageName()`
`protected boolean`	`hasActivationContext()`	Does the activation context have any values? Used, typically, inside an override of `toString()`.
`Link`	`toLink(PageRenderLinkSource linkSource)`	Converts the callback (the page name and activation context) to a link; such a link may be returned from a event handler method to cause Tapestry to redirect to the page.
`String`	`toString()`

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

- Constructor Detail
  - PageCallback
```
public PageCallback(String pageName,
                    String[] activationContext)
```
  - PageCallback
```
public PageCallback(String pageName,
                    EventContext activationContext)
```
  - PageCallback
```
public PageCallback(String pageName)
```
- Method Detail
  - getPageName
```
public String getPageName()
```
  - toString
```
public String toString()
```
    Overrides:
    
    toString in class Object
  - hasActivationContext
```
protected final boolean hasActivationContext()
```
    Does the activation context have any values? Used, typically, inside an override of toString().
  - activationContextDescription
```
protected final String activationContextDescription()
```
    Returns the activation context as a string of value separated by slashes. Typically used inside an override of toString().
  - toLink
```
public Link toLink(PageRenderLinkSource linkSource)
```
    Converts the callback (the page name and activation context) to a link; such a link may be returned from a event handler method to cause Tapestry to redirect to the page. Most of the details are encapsulated inside the PageRenderLinkSource service.
    
    Parameters:
    
    linkSource - used to generate the link
    
    Returns:
    
    link corresponding to this callback