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package javax.faces.component;
import javax.el.MethodExpression;
import javax.faces.event.ActionListener;
/**
* <p>
* <strong>ActionSource2</strong> extends {@link ActionSource} and provides a JavaBeans property
* analogous to the "<code>action</code>" property on <code>ActionSource</code>. The difference is
* the type of this property is a {@link MethodExpression} rather than a <code>MethodBinding</code>.
* This allows the <code>ActionSource</code> concept to leverage the new Unified EL API.
* </p>
*
* @since 1.2
*/
public interface ActionSource2 extends ActionSource {
// -------------------------------------------------------------- Properties
/**
* <p>
* Return the {@link MethodExpression} pointing at the application action to be invoked, if this
* {@link UIComponent} is activated by the user, during the <em>Apply Request Values</em> or
* <em>Invoke Application</em> phase of the request processing lifecycle, depending on the value
* of the <code>immediate</code> property.
* </p>
*
* <p>
* Note that it's possible that the returned <code>MethodExpression</code> is just a wrapper
* around a <code>MethodBinding</code> instance whith was set by a call to
* {@link ActionSource#setAction}. This makes it possible for the default {@link ActionListener}
* to continue to work properly with older components.
* </p>
*
* @return the action expression.
*/
public MethodExpression getActionExpression();
/**
* <p>
* Set the {@link MethodExpression} pointing at the appication action to be invoked, if this
* {@link UIComponent} is activated by the user, during the <em>Apply Request Values</em> or
* <em>Invoke Application</em> phase of the request processing lifecycle, depending on the value
* of the <code>immediate</code> property.
* </p>
*
* <p>
* Any method referenced by such an expression must be public, with a return type of
* <code>String</code>, and accept no parameters.
* </p>
*
* @param action The new method expression
*/
public void setActionExpression(MethodExpression action);
}