package org.esigate.extension.surrogate.http;
   
   /**
    * 
    * Capability tokens indicate sets of operations (e.g., caching, processing) that a surrogate is willing to perform.
    * They follow the form of product tokens in the HTTP;
    * <p>
    * capability = token [ "/" token ]
    * <p>
   * Capability tokens are case-sensitive.
   * 
   * @author Nicolas Richeton
   * 
   */
  public final class Capability {
  
      private String id;
      private String version;
  
      public String getId() {
          return id;
      }
  
      public String getVersion() {
          return version;
      }
  
      private Capability() {
          version = null;
          id = null;
      }
  
      public static Capability fromToken(String token) {
          Capability cap = new Capability();
  
          if (token == null) {
              return cap;
          }
  
          int separatorIndex = token.indexOf('/');
          if (separatorIndex >= 0) {
              cap.id = token.substring(0, separatorIndex).trim();
              cap.version = token.substring(separatorIndex + 1).trim();
          } else {
              cap.id = token.trim();
          }
  
          return cap;
      }
  
      @Override
      public String toString() {
  
          String token = id;
          if (version != null) {
              token = token + "/" + version;
          }
          return token;
      }
  }