MappedElementExtractor.java 文件源码

/**
 * Extracts the type level mapping if any. Makes sure that at least "/" is mapped and restricted to the given methods, if there any.
 *
 * @param parentRequestMapping
 * @return
 */
Map<String, List<RequestMethod>> extractTypeLevelMappings(final RequestMapping parentRequestMapping) {
    final Map<String, List<RequestMethod>> parentUrls = new TreeMap<>();
    List<String> urls = new ArrayList<>();
    List<RequestMethod> methods = new ArrayList<>();
    if (parentRequestMapping != null) {
        try {
            urls = concatValues(parentRequestMapping.value(), parentRequestMapping.path());
            methods = Arrays.asList(parentRequestMapping.method());
        } catch (IncompleteAnnotationException ex) {
            // ignore as may be thrown while typing annotations
        }
    }
    final List<String> usedUrls = urls.isEmpty() ? Arrays.asList("/") : urls;
    for (final String url : usedUrls) {
        final String usedUrl = url.startsWith("/") ? url : "/" + url;
        parentUrls.put(usedUrl, methods);
    }
    return parentUrls;
}