//the rest of the method treats single jar like
//a nested path with one file
Path sources = createUnifiedSourcePath();
//set up our mapping policy
FileNameMapper destMapper;
if (hasMapper) {
destMapper = mapper;
} else {
//no mapper? use the identity policy
destMapper = new IdentityMapper();
}
//at this point the paths are set up with lists of files,
//and the mapper is ready to map from source dirs to dest files
//now we iterate through every JAR giving source and dest names
// deal with the paths
Iterator iter = sources.iterator();
while (iter.hasNext()) {
Resource r = (Resource) iter.next();
FileResource fr = ResourceUtils
.asFileResource((FileProvider) r.as(FileProvider.class));
//calculate our destination directory; it is either the destDir
//attribute, or the base dir of the fileset (for in situ updates)
File toDir = hasDestDir ? destDir : fr.getBaseDir();
//determine the destination filename via the mapper
String[] destFilenames = destMapper.mapFileName(fr.getName());
if (destFilenames == null || destFilenames.length != 1) {
//we only like simple mappers.
throw new BuildException(ERROR_BAD_MAP + fr.getFile());
}
File destFile = new File(toDir, destFilenames[0]);