> -----Original Message-----
> From: Eddie Bush [mailto:[EMAIL PROTECTED]]
>
> Hi guys - small question I haven't had much success at solving: How
> would you do something like:
>
> <c:set var="foo"
> value="${requestScope['someBean'].singleItem['foo']"/>
The [] operator in EL expects the operans, the return of getSingleItem, to
be a collection itself, though not java.util.Collection since it doesn't
specify any get methods itself. You want to invoke a plain old method, not
a property accessor, which is not yet supported in EL, though see the JSP
2.0 spec for some interesting stuff in this direction.
> I have a bean which has a Collection attribute. Some of it's methods
> include:
>
> - getCollection()
> - setCollection(Collection c)
> - addSingle(SingleBean sb)
> - getSingle(String id)
Assuming getSingle(String id) was meant to be getSingleItem to match the
example EL expression above (^; you could change the class to
- Map getSingleItem()
Then your EL expression should work. But this is non-obvious to anyone
other than you as the return type doesn't semantically match the method
name. Better would be to have a getMap in addition to or in place of
getCollection--java.util.Collection does not have *any* get methods. As you
have discovered the hard way, a JavaBean accessor cannot take *any*
arguments.
> What I want to do is invoke getSingle. The only way I'm able to get
> getSingle recognized is to use bean patterns
> (getSingle()/setSingle(SingleBean)). What I am trying to do
> is effect a
> lookup in the Collection - but I have to manually do it (iterate over
> the collection doing comparisons).
You need a map property, basically, which you can than reference with a
String key. Or any collection that has a get method that takes the type of
index you want to use with the [] operator in EL, number or string.
Struts indexed property support works subtly differently from the EL []
operator, which I think leads to your particular quandary, but the JSTL spec
is quite clear, here.
Thomas Gideon
Sr. Software Developer
B2eMarkets
301.230.2236 Tel.
301.230.2248 Fax.
[EMAIL PROTECTED]
www.B2eMarkets.com
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