How to use Entity Object (EO)

Question

Hi,
Can anyone, please list down the basics steps that one needs to follow to implemenet EOs. I havent used EO and not clear at all, how i can use it.
Steps like, wht sort of code goes in CO and AM and how we can write code for insert and update using EOs.
Please expain by taking an example.
Anypointer in this regard will be very helpful.
Thanks in advance
Saurabh

Answer 1

EOImpl.java
Validations:
put you attribute level validation in SetAttr..() method
this method will be called when you enter any values in the screen and do form submit
Cross Validation:
If you want to compare two different attributes, put your code in validateEntity() method.
This method will be called once all the setAttr..() methods are called.
Initialize:
If you want to initialize any data values then write your code in create() method
Delete:
if you want to do some DMLs while deleting the row, do it in delete() method
Calculations:
if you want to derive some values from different column into another column, do it in doDML() method.
you can find sample code in create, update, delete excercises.
--Prasanna