Is there such thing as a "pre-action"?

I'm wondering if there is such thing as a "pre-action" that would get executed before a page is displayed rather than an action that gets executed as a result of submitting a form?
For example, I have an application that has 3 pages. Page 1 submits to page 2 and page 2 submits to page 3. I want to make it so that a user couldn't just access pages 2 or 3 without going through the preceding pages.
I'm thinking of creating a bean property something like page1Validated that would return a boolean. Then, have a check so that if page1Validated isn't true, if the user attempts to access page 2 directly (which normally, they shouldn't), it redirects them to page 1.
So, basically, I want to have some conditional code that runs before the page is executed that optionaly does a redirect to another page.
I'm thinking that I could do this using a servlet filter. Has anyone else ran into this problem? Is using a filter the recommended approach to solving this problem?
Jon

Another thing that I need to figure out is how to prevent the user from attempting to access the page as a .jsp rather than a .faces file (I have a servlet mapping to map all requests for *.faces to the Faces Servlet). I used to put all my .jsps in the WEB-INF directory to handle this back when I was implementing my own contoller. I asked this question previously, but, never received a response.

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I have asked one question there, so we shall see if I get some answer there.
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Im having a problem getting my iphone to turn on. when I link it to my computer its says the usb failed. Try another one and the same thing? Is there such things are iphone virus

Juleslye wrote:
? Is there such things are iphone virus
No. > https://discussions.apple.com/message/22315137
Juleslye wrote:
Im having a problem getting my iphone to turn on.
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Juleslye wrote:
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Is there such thing as a "pre-action"?

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