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Spring web flow: session access from model validator  RSS feed

Felipe Vega
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Good evening to all!!!

It's been a while since I post in javaranch and I really appreciate your effort of helping and continue learning.

I have been learning Spring, to be more specific Spring Web Flow... Everithing was perfect and documentation helped a lot until a found the following situation:

I am using what documentation call "model validate method" however, I am facing a situation where I need to access the session to validate if a value exists in the database. My question may be so simple... ¿How can I access the session from a bean's validate${state} method?

Please look at the following code and its description:

What I want to explain for this flow configuration is:
1) I am using the <result="flowScope.carInfo"> to pass a bean to the form when first loading so I can have my form with values loaded from the database.
2) I am using the <model="flowScope.carInfo"> to indicate the model so I can create a validate<model> method in the carInfo bean.

Now please look the validator<model> method in the carInfo bean:

The point to describe here are:

1) The code is pointing ok to the method and the validation in the first condition success and returns as expected to the view.
2) In the else statement, I need to access a DAO method of another bean. (car != carInfo)
3) The other bean (car) has not been initialized within the scope of the flow.
4) I can initialize the DAO using the session. [solution]

¿How can I get the Session to validate a value in the database when using the Spring Web Flow Validator Model?

The official doc I found is the official one for spring, just search for "Implementing a model validate method" (Please just google it since I am not sure if I can paste the link here)

I hope this question to be trivial for experts.... THANK YOU VERY VERY MUCH IN ADVANCE...

Kind Regards

Luis Felipe

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