Another way is to override some methods in MountedMapper (thus creating
your AnotherPageMapper or something like that).
Methods of interest:
- getCompatibilityScore(): should only return 1 if the url starts with
"b" or "c"
See the default MountedMapper implementation, you could simply say:
if( urlStartsWith(request.getUrl(), "b") ||
urlStartsWith(request.getUrl(), "c") {
return 1;
} else {
return 0;
}
This will make sure that your mapper only handles "/b" and "/c". You can
still mount it at "/${param}" so it automatically puts the b or c in the
PageParameters upon decoding, and puts it in the url upon encoding.
Then simply call (in webapp.init()):
mount(new AnotherPageMapper("/${param}"));
This will add your mapper before all others, thus making sure it is
checked before others on encoding and decoding requests.
Op 6-11-2011 19:02, schreef heikki:
hi,
thanks for your explanation. As I want to restrict the possible paths to
AnotherPage to /b and /c and not /xyz, I went for the IRequestMapper
implementation.
I now have an implementation that seems to work perfect, but I'm afraid it's
not thread-safe and I'm not sure if I've understood things correctly. So
please, if you could help me answer the following questions ?
I need to return different URLs from mapHandler() for AnotherPage and for
any other URLs I have in my application. This is because I need the "b" or
"c" as PageParameter to AnotherPage, but it should not happen for other
URLs. So I implemented IRequestMapper such that it wraps the default
RootRequestMapper to be used for all requests except /b and /c, which are
handled by a different IRequestMapper that uses a path variable. In my
Application:
setRootRequestMapper(new RootRequestMapper(getRootRequestMapper(),
new MountedMapper("/${param}", AnotherPage.class)));
Then in my IRequestMapper implementation, in mapRequest() the request url
segments are checked and if it's /b or /c, use the second one.
To get things to work with the correct URL for both cases, I also check in
mapHandler() which IRequestMapper should return the URL. However I found no
way to remember which case (/b, or anything esle) is being handled between
the mapRequest and mapHandler() methods, so I stored this in a class
variable. This is what I think is not thread-safe.
Please see my implementation here http://pastebin.com/h0rhtFLz.
Surely there's a better of way dealing with this ?
thank you and kind regards
Heikki Doeleman
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