/**
* Returns the list of representation variants associated to a given annotation value,
* corresponding to either an input or output entity.
*
* @param metadataService The metadata service to use.
* @param annotationValue The entity annotation value.
* @return A list of variants.
*/
private List<Variant> getVariants(MetadataService metadataService, String annotationValue) {
List<Variant> result = null;
if (annotationValue != null) {
String[] variants = annotationValue.split("\\|");
for (String variantValue : variants) {
Variant variant = null;
String[] extensions = variantValue.split("\\+");
List<MediaType> mediaTypes = null;
List<Language> languages = null;
CharacterSet characterSet = null;
for (String extension : extensions) {
if (extension != null) {
List<Metadata> metadataList = metadataService.getAllMetadata(extension);
if (metadataList != null) {
for (Metadata metadata : metadataList) {
if (metadata instanceof MediaType) {
if (mediaTypes == null) {
mediaTypes = new ArrayList<MediaType>();
}
mediaTypes.add((MediaType) metadata);
} else if (metadata instanceof Language) {
if (languages == null) {
languages = new ArrayList<Language>();
}
languages.add((Language) metadata);
} else if (metadata instanceof CharacterSet) {
if (characterSet == null) {
characterSet = (CharacterSet) metadata;
} else {
Context.getCurrentLogger()
.warning(
"A representation variant can have only one character set. Please check your annotation value.");
}
}
}
}
}
}
// Now build the representation variants
if (mediaTypes != null) {
for (MediaType mediaType : mediaTypes) {
if ((result == null) || (!result.contains(mediaType))) {
if (result == null) {
result = new ArrayList<Variant>();
}
variant = new Variant(mediaType);
if (languages != null) {
variant.getLanguages().addAll(languages);
}
if (characterSet != null) {
variant.setCharacterSet(characterSet);
}
result.add(variant);
}
}
}
}
}
return result;
}
