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<p>Support classes that allows an object
to expose listener <em>methods</em> instead of listener <em>properties</em>.

<p>
Normally, a listener property must be an object that implement
{@link org.apache.tapestry.IActionListener}.  This can be cumbersome, in practice, as it
typically involves creating an anonymous inner class.

<p>
Using this mechanism, classes can instead implement listener <em>methods</em>.
A listener method takes the form:

<pre>
public void <em>method-name</em>({@link org.apache.tapestry.IRequestCycle} cycle) 
throws {@link org.apache.tapestry.ApplicationRuntimeException}</code>
</pre>

<p>The <code>throws</code> clause is optional, but may not throw any 
additional exceptions.

<p>Tapestry will create an appropriate listener object that will invoke the
corresponding method.

<p>The methods can be accessed using the property path "<code>listeners.<em>method-name</em></code>"

@see org.apache.tapestry.listener.ListenerMap
@see org.apache.tapestry.AbstractComponent#getListeners()
@see org.apache.tapestry.engine.AbstractEngine#getListeners()
@since 1.0.2

@author Howard Lewis Ship <a href="mailto:hlship@apache.org">hlship@apache.org</a>

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