openlayers/lib/OpenLayers/Format/WMSDescribeLayer/v1_1.js

   1 /* Copyright (c) 2006-2008 MetaCarta, Inc., published under the Clear BSD
   2  * license.  See http://svn.openlayers.org/trunk/openlayers/license.txt for the
   3  * full text of the license. */
   4
   5 /**
   6  * @requires OpenLayers/Format/WMSDescribeLayer.js
   7  */
   8
   9 /**
  10  * Class: OpenLayers.Format.WMSDescribeLayer.v1_1
  11  * Read SLD WMS DescribeLayer response for WMS 1.1.X
  12  * WMS 1.1.X is tightly coupled to SLD 1.0.0
  13  *
  14  * Example DescribeLayer request:
  15  * http://demo.opengeo.org/geoserver/wms?request=DescribeLayer&version=1.1.1&layers=topp:states
  16  *
  17  * Inherits from:
  18  *  - <OpenLayers.Format.WMSDescribeLayer>
  19  */
  20 OpenLayers.Format.WMSDescribeLayer.v1_1 = OpenLayers.Class(
  21     OpenLayers.Format.WMSDescribeLayer, {
  22
  23     /**
  24      * Constructor: OpenLayers.Format.WMSDescribeLayer
  25      * Create a new parser for WMS DescribeLayer responses.
  26      *
  27      * Parameters:
  28      * options - {Object} An optional object whose properties will be set on
  29      *     this instance.
  30      */
  31     initialize: function(options) {
  32         OpenLayers.Format.WMSDescribeLayer.prototype.initialize.apply(this,
  33             [options]);
  34     },
  35
  36     /**
  37      * APIMethod: read
  38      * Read DescribeLayer data from a string, and return the response.
  39      * The OGC defines 2 formats which are allowed for output,
  40      * so we need to parse these 2 types for version 1.1.X
  41      *
  42      * Parameters:
  43      * data - {String} or {DOMElement} data to read/parse.
  44      *
  45      * Returns:
  46      * {Array} Array of {<LayerDescription>} objects which have:
  47      * - {String} owsType: WFS/WCS
  48      * - {String} owsURL: the online resource
  49      * - {String} typeName: the name of the typename on the service
  50      */
  51     read: function(data) {
  52         if(typeof data == "string") {
  53             data = OpenLayers.Format.XML.prototype.read.apply(this, [data]);
  54         }
  55         var root = data.documentElement;
  56         var children = root.childNodes;
  57         var describelayer = [];
  58         for(var i=0; i<children.length; ++i) {
  59             childNode = children[i];
  60             nodeName = childNode.nodeName;
  61             if (nodeName == 'LayerDescription') {
  62                 var owsType = '';
  63                 var owsURL = '';
  64                 var typeName = '';
  65                 // check for owsType and owsURL attributes
  66                 if (childNode.getAttribute('owsType')) {
  67                   owsType = childNode.getAttribute('owsType');
  68                   owsURL = childNode.getAttribute('owsURL');
  69                 } else {
  70                     // look for wfs or wcs attribute
  71                     if (childNode.getAttribute('wfs') != '') {
  72                         owsType = 'WFS';
  73                         owsURL = childNode.getAttribute('wfs');
  74                     } else if (childNode.getAttribute('wcs') != '') {
  75                         owsType = 'WCS';
  76                         owsURL = childNode.getAttribute('wcs');
  77                     }
  78                 }
  79                 // look for Query child
  80                 query = childNode.getElementsByTagName('Query');
  81                 if(query.length > 0) {
  82                     typeName = query[0].getAttribute('typeName');
  83                     if (!typeName) {
  84                         // because of Ionic bug
  85                         typeName = query[0].getAttribute('typename');
  86                     }
  87                 }
  88                 describelayer.push({owsType: owsType, owsURL: owsURL, typeName: typeName});
  89             }
  90         }
  91         return describelayer;
  92     },
  93
  94     CLASS_NAME: "OpenLayers.Format.WMSDescribeLayer.v1_1"
  95
  96 });