Jar: protocol question  
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Rhino
PostPosted: 2005-10-29 23:20:00 Top
java-programmer, Jar: protocol question I've been using the Jar: protocol a bit in the last few days and I'd like to
know if this is a valid use of that protocol:

jar:file:!/Images/foo.gif

Basically, I'm trying to describe the location of a GIF that a program
should be able to find in one of the various jars that are on the classpath
used by the program.

Since 'this.getClass().getResource()' will search EVERY jar in the classpath
for the desired file, it shouldn't be necessary to specify the jar name.
Therefore, it seems to me that this should be valid notation for indicating
that the jar name isn't necessary in this case: the bang ('!') in the name
following the 'file:' suggests to me that the default jar(s), namely all of
the jars found in the classpath, will be searched for an Images directory
and a file named foo.gif within that directory.

Does that seem reasonable? If not, can anyone suggest a better notation to
use for my situation?

I can't find any discussion of this "special case" in the articles I've seen
about the Jar: protocol.


--
Rhino
---
rhino1 AT sympatico DOT ca
"There are two ways of constructing a software design. One way is to make it
so simple that there are obviously no deficiencies. And the other way is to
make it so complicated that there are no obvious deficiencies." - C.A.R.
Hoare


 
Roedy Green
PostPosted: 2005-10-30 13:57:00 Top
java-programmer >> Jar: protocol question On Sat, 29 Oct 2005 11:20:01 -0400, "Rhino"
<email***@***.com> wrote, quoted or indirectly
quoted someone who said :

>Since 'this.getClass().getResource()' will search EVERY jar in the classpath
>for the desired file, it shouldn't be necessary to specify the jar name.
>Therefore, it seems to me that this should be valid notation for indicating
>that the jar name isn't necessary in this case: the bang ('!') in the name
>following the 'file:' suggests to me that the default jar(s), namely all of
>the jars found in the classpath, will be searched for an Images directory
>and a file named foo.gif within that directory.

getResource does a search and gives you a direct url to the Jar where
it found the resource.

If you want to speed that search, use the class-path and index
feature of jar.exe to build a multi-jar index for direct lookup.
--
Canadian Mind Products, Roedy Green.
http://mindprod.com Java custom programming, consulting and coaching.
 
 
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