I'd just inject all three assets and choose which one to return.
Injection is cheap. Maybe your situation is actually more complex.
On Nov 19, 2007 5:51 PM, Doublel <[EMAIL PROTECTED]> wrote:
> Yes it works well.Thanks very much
> complete code :
>
> @Inject
> private ComponentResources resource;
> @Inject
> private AssetSource assetSource;
>
>
> private Asset weatherImagePath;
>
> /**
> * @param weatherImagePath the weatherImagePath to set
> */
> public void setWeatherImagePath(Asset weatherImagePath) {
> this.weatherImagePath = weatherImagePath;
> }
>
> public Asset getWeatherImagePath(){
>
>
> return this.assetSource.findAsset(
> this.resource.getBaseResource(),
> "context:images/weather/"+this.weatherPath, null);
> }
>
> public void onActivate(String id){
> //bc is load from DB
> if (lw.hnSunny.equals(bc.getLogWeather())){
> this.weatherPath="hn2_sunny.gif";
>
> }else if (lw.hnIce.equals(bc.getLogWeather()))
> {
> this.weatherPath="hn2_ice.gif";
> }else if (lw.hnCloudy.equals(bc.getLogWeather()))
> {
> this.weatherPath="hn2_cloudy.gif";
> }
>
> }
>
>
> 2007/11/20, Josh Canfield <[EMAIL PROTECTED]>:
>
> >
> > Injecting the asset as you've done doesn't make a lot of sense since the
> > annotation @Path is a compile time construct. So what you are getting in
> > your annotation is probably null, or whatever your default for weatherPath
> > was.
> >
> > The advantage to using AssetResource is that you can look up assets at
> > runtime...
> >
> > Josh
> >
> > On Nov 19, 2007 5:34 AM, Chris Lewis <[EMAIL PROTECTED]> wrote:
> >
> > > I've not seen AssetResource - what is the advantage to using it like
> > > this as opposed simply to injecting the asset?
> > >
> > > lasitha wrote:
> > > > On Nov 19, 2007 2:37 PM, Doublel <[EMAIL PROTECTED]> wrote:
> > > >
> > > >> public void onActivate(String id){
> > > >> if (lw.hnSunny.equals(bc.getLogWeather())){
> > > >> this.weatherPath="logweath.gif";
> > > >> ...
> > > >> @Inject
> > > >> @Path("context:/images/"+ weatherPath )
> > > >> private Asset trackback;
> > > >>
> > > >> I want to implement image can dynamic by var weatherPath
> > > >>
> > > >
> > > > Hello, i'd try injecting the AssetSource service directly into your
> > > > page/component and using it to look up the resource dynamically.
> > > >
> > >
> > http://tapestry.apache.org/tapestry5/tapestry-core/apidocs/org/apache/tapestry/services/AssetSource.html
> > > >
> > > > I haven't tested this, but something like:
> > > >
> > > > @Inject ComponentResources resources;
> > > > @Inject AssetSource assetSource;
> > > >
> > > > Asset getTrackback() {
> > > > return assetSource.findAsset(
> > > > resources.getBaseResource(),
> > > > "context:/images/" + calculateWeatherPath(),
> > > > null);
> > > > }
> > > >
> > > > It actually may work with just null for the first parameter (the
> > > > resource base) too.
> > > >
> > > > Cheers,
> > > > lasitha
> > > >
> > > > ---------------------------------------------------------------------
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> > > >
> > > >
> > > >
> > >
> > >
> >
> >
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>
>
>
> --
> 得与失都是生活
>
--
Howard M. Lewis Ship
Partner and Senior Architect at Feature50
Creator Apache Tapestry and Apache HiveMind
