private Set<String> getScopesForField(final String fieldName) {
final Set<String> scopes = Sets.newHashSet();
// add specific scope in case of specific request
final String[] fields = Tokenizer.tokenize(fieldName, ",");
for (final String field : fields) {
final String[] subfields = Tokenizer.tokenize(field, ".");
// in case of nested path, add first level as stand-alone to ensure subgraph is added
scopes.add(SelectableScopeResolver.PREFIX + subfields[0]);
if (subfields.length > 1) {
scopes.add(SelectableScopeResolver.PREFIX + field);
}
}
return scopes;
}
private static List<MediaType> extractMediaTypes(final String[] values) {
if (values.length == 0) {
return Collections.emptyList();
}
final List<MediaType> types = new ArrayList<MediaType>(values.length);
for (final String mtEntry : values) {
for (final String mt : Tokenizer.tokenize(mtEntry, ",")) {
types.add(MediaType.valueOf(mt));
}
}
return types;
}
/**
* Extract the list of link relations from the string value of a {@link Link#REL} attribute.
*
* @param rel string value of the link {@code "rel"} attribute.
* @return list of relations in the {@code "rel"} attribute string value.
*/
static List<String> getLinkRelations(final String rel) {
return (rel == null) ? null : Arrays.asList(Tokenizer.tokenize(rel, "\" "));
}