docs: function resolveFile(file, pathes) {
      var strResult = '';
  
      for(var i = 0, len = pathes.length; i < len; i ++) {
          extName = path.extname(pathes[i]);
          switch (extName) {
              case '.js':
                  strResult += resolveScripts(file, [pathes[i]]);
                  break;
              case '.css':
                  strResult += resolveStylesheet(file, [pathes[i]]);
                  break;
              case '.html':
                  strResult += resolveTemplate(file, [pathes[i]]);
                  break;
              default :
                  throw new PluginError("gulp-xinclude", "暂不支持类型[" + extName + "]的文件");
          }
      }
      return strResult;
  }