[jboss-user] [JBoss Seam] - Re: [booking example]: question regarding the HotelBookingAc

[petemuir]

The required attribute on @In/@Out simply says whether the variable can be null or not, by default required=true.

so, lets say we have a variable foo.

If the context variable foo is null

@In Foo foo;

would throw a RequiredException

but

@In(required=true) Foo foo;

wouldn't.

But, if the context variable foo is not null

neither

@In Foo foo;

nor

@In(required=true) Foo foo;

would throw a RequiredException.

If you are using out, its the instance variable, not the context variable that is not null.

If create=true then, if the context variable is null, Seam attempts to create it (@Name or @Factory), if it can't, and required=true, then a RequiredException will be thrown.


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