Re: [aspectj-users] AspectJ and inputstream

["Andy Clement" <andrew.clement@xxxxxxxxx>]

Your before() advice is simply assigning the advice local variable
called 'is', it won't affect the advised location.  You could use
around advice to do that.

void around(InputStream is): execution(* bar(..)) && args(is) {
  String l = readContents(is);
  ByteArrayInputStream bais = new ByteArrayInputStream(l.getBytes());
 return proceed(bais);
}

Andy.

2009/1/20 Al Aghili <aaghili@xxxxxxxxxxxxxxxxxx>:
>
>
> Hi,
> I'm having an issue trying to read an inputstream data in my aspect and then
> setting the input stream object to a new object. This doesn't work
>
> Here is the sample code
>
> public class AspectSampleMain {
> public static void main(String[] args) {
>                 // TODO Auto-generated method stub
>                 String test = "hello world
> askdjlasdkjaldkjasldkjalsdkjaslkdjalskjdslakjd dsjalkjd";
>         ByteArrayInputStream bais = new
> ByteArrayInputStream(test.getBytes());
>         InputStream is = bais;
>        bar(is);
>
> }
> public static void bar(InputStream is){
>         String l =  readContent(is);
>                System.out.println(l); // l is blank this is wrong because is
> has been read.
> }
> }
> Here is my aspect
> public aspect AspectSample {
>         pointcut sample(java.io.InputStream is):
>     execution(* AspectSampleMain.bar( .. ))
>     && args(is);
>
>     before (java.io.InputStream is):sample(is){
>
>     String l =  readContent(is);
>              ByteArrayInputStream bais = new
> ByteArrayInputStream(l.getBytes());
>              is = bais;
>
>     }
> }
>
> This does not work as the "is" does not get set to bais after the aspect
> returns to the bar() code. So the input stream has been read and can't be
> re-read again.
>
> How do I get around this.
>
> Thanks
> Al
>
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