com.liferay.faces.bridge.context.flash
Class BridgeFlashFactoryImpl

java.lang.Object
  com.liferay.faces.bridge.context.flash.BridgeFlashFactory
      com.liferay.faces.bridge.context.flash.BridgeFlashFactoryImpl

All Implemented Interfaces:

FactoryWrapper<BridgeFlashFactory>, javax.faces.FacesWrapper<BridgeFlashFactory>

public class BridgeFlashFactoryImpl
extends BridgeFlashFactory

This class provides a factory-style way of obtaining the JSF Flash scope instance provided by the JSF runtime (Mojarra or MyFaces).

Background: The JSF 2.0/2.1 API does not currently provide a factory-style way of obtaining Flash scope instances. Instead, the ExternalContext.getFlash() method inside the JSF runtime is responsible for acting as a pseudo-factory for creating instances. If the bridge were to use that approach for obtaining the Flash scope instance, it would require the bridge to create instances of the JSF runtime's ExternalContext. Such an operation would impose a big cost/overhead/expense, and since there are Servlet-API dependencies involved, it would require the bridge to provide hack implementations of the ServletContext, HttpServletRequest, and HttpServletResponse. All this would be required, simply to call the ExternalContext.getFlash() method.

As an alternative approach, this class simply uses Java reflection to obtain the JSF Flash scope instance from the ClassLoader. While it is true that Java reflection is expensive, it is certainly less expensive than the ExternalContext.getFlash() approach described above. Hopefully we can get a factory-style way of obtaining Flash scope instances in the JSF 2.2 API, which would make this class obsolete.

Author:

Neil Griffin

Constructor Summary

BridgeFlashFactoryImpl()

Method Summary

BridgeFlash	getBridgeFlash()
BridgeFlashFactory	getWrapped()

Methods inherited from class java.lang.Object

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

Constructor Detail

BridgeFlashFactoryImpl

public BridgeFlashFactoryImpl()

Method Detail

getBridgeFlash

public BridgeFlash getBridgeFlash()

Specified by:

getBridgeFlash in class BridgeFlashFactory

getWrapped

public BridgeFlashFactory getWrapped()