ADF Taskflow constraints

• ADF Controller objects have the following constraints 
• JSF as the sole view layer technology 
• Depended on Oracle ADF Faces 
• ADF controller manages navigation and some extend the state management though JSF and servelet apis are there for state management of its own.
• ADF Model layer is used to implement the application's model layer 
• Depend on MDS 
• No supported migration path from struts or model 1 architectures.
•  Bounded TaskFlow 
• Exposed as page flow scope 
• Uses ADF Task flow as transaction boundaries 
• In order to access page flow scope before and after listener has to executed on restore view phase 
• Should perform all navigations through ADF controller flow rules instead of naviagation rules on faces-config.xml