org.apache.tapestry.binding
Class ListenerBinding

java.lang.Object
  org.apache.tapestry.binding.AbstractBinding
      org.apache.tapestry.binding.ListenerBinding

All Implemented Interfaces:

IActionListener, IBinding, ILocatable

public class ListenerBinding
extends AbstractBinding
implements IActionListener

A very specialized binding that can be used as an IActionListener, executing a script in a scripting language, via Bean Scripting Framework.

Since:

3.0

Version:

$Id: ListenerBinding.java 243791 2004-02-19 17:38:13Z hlship $

Author:

Howard Lewis Ship

Constructor Summary

ListenerBinding(IComponent component, String language, String script, ILocation location)

Method Summary

void	actionTriggered(IComponent component, IRequestCycle cycle) A ListenerBinding is also a IActionListener.
boolean	getBoolean() Always returns true.
double	getDouble() Gets the value of the Binding using IBinding.getObject() and coerces it to a double.
int	getInt() Gets the value of the Binding using IBinding.getObject() and coerces it to an int.
Object	getObject() Returns this.
String	getString() Returns the underlying script.

Methods inherited from class org.apache.tapestry.binding.AbstractBinding

createReadOnlyBindingException, getLocation, getObject, isInvariant, isWrapper, setBoolean, setDouble, setInt, setObject, setString

Methods inherited from class java.lang.Object

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

Constructor Detail

ListenerBinding

public ListenerBinding(IComponent component,
                       String language,
                       String script,
                       ILocation location)

Method Detail

getBoolean

public boolean getBoolean()

Always returns true.

Specified by:

getBoolean in interface IBinding

Overrides:

getBoolean in class AbstractBinding

See Also:

Tapestry.evaluateBoolean(Object)

getInt

public int getInt()

Description copied from interface: IBinding

Gets the value of the Binding using IBinding.getObject() and coerces it to an int. Strings will be parsed, and other java.lang.Number classes will have intValue() invoked.

Specified by:

getInt in interface IBinding

Overrides:

getInt in class AbstractBinding

getDouble

public double getDouble()

Description copied from interface: IBinding

Gets the value of the Binding using IBinding.getObject() and coerces it to a double. Strings will be parsed, and other java.lang.Number classes will have doubleValue() invoked.

Specified by:

getDouble in interface IBinding

Overrides:

getDouble in class AbstractBinding

getString

public String getString()

Returns the underlying script.

Specified by:

getString in interface IBinding

Overrides:

getString in class AbstractBinding

getObject

public Object getObject()

Returns this.

Specified by:

getObject in interface IBinding

actionTriggered

public void actionTriggered(IComponent component,
                            IRequestCycle cycle)

A ListenerBinding is also a IActionListener. It registers a number of beans with the BSF manager and invokes the script.

Registers the following bean:

• component - the relevant IComponent, typically the same as the page
• page - the IPage trigged by the request (obtained by IRequestCycle.getPage()
• cycle - the IRequestCycle, from which can be found the IEngine, etc.

Specified by:

actionTriggered in interface IActionListener

Parameters:

component - The component which was "triggered".

cycle - The request cycle in which the component was triggered.