[Swift-devel] mappers on files that are inputs and outputs

[Mihael Hategan]

You should probably also add the input=true mapping parameter?

Mihael

On Wed, 2007-05-16 at 15:26 +0000, Ben Clifford wrote:
> Here's a code fragment:
> 
>   type volume {
>       imagefile img;
>       headerfile hdr;
>   };
> 
>   volume atlas <simple_mapper;prefix="atlas">;
>   atlas = softmean(slices);
> 
>   string directions[] = [ "x", "y", "z"];
> 
>   foreach direction in directions {
>       giffile outputgif 
>           <single_file_mapper;file=@strcat("atlas-",direction,".gif")>;
>       string option = @strcat("-",direction);
>       outputgif = slice_to_gif(atlas, option, ".5");
>   }
> 
> When this is run as part of a workflow, there are no atlas.* files and the 
> atlas = softmean(slices) line causes atlas.hdr and atlas.img files to be 
> created and placed in my working directory, and also used in the 
> subsequent slice_to_gif calls.
> 
> If I prune the program in a text editor so that the altas = ... line is 
> not called, and leave the atlas.hdr and atlas.img files in place in my 
> current directory (so that the files are now input files, rather than 
> intermediate files), I get this error:
> 
>   $ swift -debug -tc.file tc.data play.swift 
>   WARN   - Failed to configure log file name
> 
>   Swift v0.1-dev
> 
>   RunID: mx49u8a36d1m0
>   Execution failed:
>           java.lang.RuntimeException: Data set initialization failed for 
>   true. Missing required field: img mapped to atlas
> 
> 
> I think its probably a desirable feature that the same mapping that maps 
> ok for intermediate files to map for input files too.
>