/**
* Returns the list of variants that can be converted from a given object class.
*
* @param sourceClass The source class.
* @param targetVariant The expected representation metadata.
* @return The list of variants that can be converted.
*/
public static List<VariantInfo> getVariants(Class<?> sourceClass, Variant targetVariant) {
List<VariantInfo> result = null;
List<VariantInfo> helperVariants = null;
for (ConverterHelper ch : Engine.getInstance().getRegisteredConverters()) {
// List of variants that can be converted from the source class
helperVariants = ch.getVariants(sourceClass);
if (helperVariants != null) {
// Loop over the variants list
for (VariantInfo helperVariant : helperVariants) {
if (targetVariant == null) {
result = addVariant(result, helperVariant);
} else if (helperVariant.includes(targetVariant)) {
// Detected a more generic variant, but still consider
// the conversion is possible to the target variant.
result = addVariant(result, new VariantInfo(targetVariant.getMediaType()));
} else if (targetVariant.includes(helperVariant)) {
// Detected a more specific variant, but still consider
// the conversion is possible to the target variant.
result = addVariant(result, helperVariant);
}
}
}
}
return result;
}
