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package javax.faces.lifecycle;
import javax.faces.FacesException;
import javax.faces.context.FacesContext;
import javax.faces.event.PhaseListener;
/**
* Lifecycle manages the
* processing of the entire lifecycle of a particular JavaServer Faces
* request. It is responsible for executing all of the phases that have
* been defined by the JavaServer Faces Specification, in the specified
* order, unless otherwise directed by activities that occurred during
* the execution of each phase.
*
* An instance of Lifecycle is created by calling the
* getLifecycle() method of {@link LifecycleFactory}, for
* a specified lifecycle identifier. Because this instance is
* shared across multiple simultaneous requests, it must be implemented
* in a thread-safe manner.
*/
public abstract class Lifecycle {
// ---------------------------------------------------------- Public Methods
/**
* Register a new {@link PhaseListener} instance that is interested in
* being notified before and after the processing for standard phases of
* the request processing lifecycle.
*
* @param listener The {@link PhaseListener} to be registered
*
* @throws NullPointerException if listener
* is null
*/
public abstract void addPhaseListener(PhaseListener listener);
/**
* Execute all of the phases of the request processing lifecycle,
* up to but not including the Render Response phase,
* as described in the JavaServer Faces Specification, in the specified
* order. The processing flow can be affected (by the application,
* by components, or by event listeners) by calls to the
* renderResponse() or responseComplete()
* methods of the {@link FacesContext} instance associated with
* the current request.
*
* @param context FacesContext for the request to be processed
*
* @throws FacesException if thrown during the execution of the
* request processing lifecycle
* @throws NullPointerException if context
* is null
*/
public abstract void execute(FacesContext context) throws FacesException;
/**
* Return the set of registered {@link PhaseListener}s for this
* {@link Lifecycle} instance. If there are no registered listeners,
* a zero-length array is returned.
*/
public abstract PhaseListener[] getPhaseListeners();
/**
* Deregister an existing {@link PhaseListener} instance that is no
* longer interested in being notified before and after the processing
* for standard phases of the request processing lifecycle. If no such
* listener instance has been registered, no action is taken.
*
* @param listener The {@link PhaseListener} to be deregistered
* @throws NullPointerException if listener
* is null
*/
public abstract void removePhaseListener(PhaseListener listener);
/**
* Execute the Render Response phase of the request
* processing lifecycle, unless the responseComplete()
* method has been called on the {@link FacesContext} instance
* associated with the current request.
*
* @param context FacesContext for the request being processed
*
* @throws FacesException if an exception is thrown during the execution
* of the request processing lifecycle
* @throws NullPointerException if context
* is null
*/
public abstract void render(FacesContext context) throws FacesException;
}