/**
* Utility function supporting resolution of uris containing 'resource' or 'alias' schemes. If the
* supplied uri schem is 'resource' or 'alias' the reference is resolved to a artifact type, group
* and name from which a resource is resolved and the uri returned. If the scheme is resource the
* usri of the resource is returned. If the scheme is 'alias' a linkn alias is returned. If the
* scheme is not 'resource' or 'alias' the argument will be evaluated as a normal transit artifact
* uri specification.
*
* @param ref the uri argument
* @return the uri value
* @exception URISyntaxException if an error occurs during uri creation
*/
public URI toURI(final String ref) throws URISyntaxException {
Artifact spec = Artifact.createArtifact(ref);
if (spec.isRecognized()) {
return spec.toURI();
} else if (ref.startsWith("resource:") || ref.startsWith("alias:")) {
String type = spec.getType();
String group = spec.getGroup();
String name = spec.getName();
String path = group + "/" + name;
Library library = getLibrary();
try {
Resource resource = library.getResource(path);
Type t = resource.getType(type);
if (ref.startsWith("resource:")) {
Artifact artifact = t.getArtifact();
return artifact.toURI();
} else {
Artifact artifact = t.getLinkArtifact();
return artifact.toURI();
}
} catch (ResourceNotFoundException e) {
final String error = "Unresolvable resource reference: " + path;
IllegalArgumentException iae = new IllegalArgumentException(error);
iae.initCause(e);
throw iae;
}
} else {
return spec.toURI();
}
}
