openlayers/lib/OpenLayers/Format/WFSCapabilities.js

   1 /**
   2  * @requires OpenLayers/Format/XML.js
   3  */
   4
   5 /**
   6  * Class: OpenLayers.Format.WFSCapabilities
   7  * Read WFS Capabilities.
   8  *
   9  * Inherits from:
  10  *  - <OpenLayers.Format.XML>
  11  */
  12 OpenLayers.Format.WFSCapabilities = OpenLayers.Class(OpenLayers.Format.XML, {
  13
  14     /**
  15      * APIProperty: defaultVersion
  16      * {String} Version number to assume if none found.  Default is "1.1.0".
  17      */
  18     defaultVersion: "1.1.0",
  19
  20     /**
  21      * APIProperty: version
  22      * {String} Specify a version string if one is known.
  23      */
  24     version: null,
  25
  26     /**
  27      * Constructor: OpenLayers.Format.WFSCapabilities
  28      * Create a new parser for WFS capabilities.
  29      *
  30      * Parameters:
  31      * options - {Object} An optional object whose properties will be set on
  32      *     this instance.
  33      */
  34     initialize: function(options) {
  35         OpenLayers.Format.XML.prototype.initialize.apply(this, [options]);
  36         this.options = options;
  37     },
  38
  39     /**
  40      * APIMethod: read
  41      * Read capabilities data from a string, and return a list of layers.
  42      *
  43      * Parameters:
  44      * data - {String} or {DOMElement} data to read/parse.
  45      *
  46      * Returns:
  47      * {Array} List of named layers.
  48      */
  49     read: function(data) {
  50         if(typeof data == "string") {
  51             data = OpenLayers.Format.XML.prototype.read.apply(this, [data]);
  52         }
  53         var root = data.documentElement;
  54         var version = this.version;
  55         if(!version) {
  56             version = root.getAttribute("version");
  57             if(!version) {
  58                 version = this.defaultVersion;
  59             }
  60         }
  61         var constr = OpenLayers.Format.WFSCapabilities[
  62             "v" + version.replace(/\./g, "_")
  63         ];
  64         if(!constr) {
  65             throw "Can't find a WFS capabilities parser for version " + version;
  66         }
  67         var parser = new constr(this.options);
  68         var capabilities = parser.read(data);
  69         capabilities.version = version;
  70         return capabilities;
  71     },
  72
  73     CLASS_NAME: "OpenLayers.Format.WFSCapabilities"
  74
  75 });