Example usage for org.springframework.web.util.pattern PathPattern SPECIFICITY_COMPARATOR

Introduction

In this page you can find the example usage for org.springframework.web.util.pattern PathPattern SPECIFICITY_COMPARATOR.

Prototype

Comparator SPECIFICITY_COMPARATOR

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Document

Comparator that sorts patterns by specificity as follows:

1. Null instances are last.

   Usage

   From source file:org.springframework.web.reactive.resource.ResourceUrlProvider.java

   private Mono<String> resolveResourceUrl(PathContainer lookupPath) {
       return this.handlerMap
               .entrySet().stream().filter(entry -> entry.getKey().matches(lookupPath)).sorted((entry1,
                       entry2) -> PathPattern.SPECIFICITY_COMPARATOR.compare(entry1.getKey(), entry2.getKey()))
               .findFirst().map(entry -> {
                   PathContainer path = entry.getKey().extractPathWithinPattern(lookupPath);
                   int endIndex = lookupPath.elements().size() - path.elements().size();
                   PathContainer mapping = lookupPath.subPath(0, endIndex);
                   if (logger.isTraceEnabled()) {
                       logger.trace(//from w ww  .j a  va2  s  .  com
                               "Invoking ResourceResolverChain for URL pattern " + "\"" + entry.getKey() + "\"");
                   }
                   ResourceWebHandler handler = entry.getValue();
                   List<ResourceResolver> resolvers = handler.getResourceResolvers();
                   ResourceResolverChain chain = new DefaultResourceResolverChain(resolvers);
                   return chain.resolveUrlPath(path.value(), handler.getLocations()).map(resolvedPath -> {
                       if (logger.isTraceEnabled()) {
                           logger.trace("Resolved public resource URL path \"" + resolvedPath + "\"");
                       }
                       return mapping.value() + resolvedPath;
                   });
   
               }).orElse(Mono.empty());
   }
   

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