DefaultProviderFilter.java 文件源码

protected List<ContextResolver<?>> sortedList(Map<ProviderKey, ContextResolver<?>> providerMap, MediaType targetMediaType) {
    List<ContextResolver<?>> contextResolvers = new ArrayList<>(providerMap.values());

    Collections.sort(contextResolvers, new Comparator<ContextResolver<?>>() {
        public int compare(ContextResolver<?> cr1, ContextResolver<?> cr2) {

            Set<String> providerMediaTypes1 = mediaTypes(cr1.getClass().getAnnotationsByType(Produces.class));
            Set<String> providerMediaTypes2 = mediaTypes(cr2.getClass().getAnnotationsByType(Produces.class));

            int score1 = relevanceScore(providerMediaTypes1, targetMediaType);
            int score2 = relevanceScore(providerMediaTypes2, targetMediaType);

            if (score1 == score2)
                return 0;

            return (score2 - score1) < 0 ? -1 : 1;
        }
    });

    return contextResolvers;
}