1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 | /* Copyright (c) 2006-2010 by OpenLayers Contributors (see authors.txt for * full list of contributors). Published under the Clear BSD license. * See http://svn.openlayers.org/trunk/openlayers/license.txt for the * full text of the license. */ /** * @requires OpenLayers/Format/XML.js */ /** * Class: OpenLayers.Format.WMTSCapabilities * Read WMTS Capabilities. * * Inherits from: * - <OpenLayers.Format.XML> */ OpenLayers.Format.WMTSCapabilities = OpenLayers.Class(OpenLayers.Format.XML, { /** * APIProperty: defaultVersion * {String} Version number to assume if none found. Default is "1.0.0". */ defaultVersion: "1.0.0", /** * APIProperty: version * {String} Specify a version string if one is known. */ version: null, /** * Property: parser * {<OpenLayers.Format>} A cached versioned format used for reading. */ parser: null, /** * APIProperty: yx * {Object} Members in the yx object are used to determine if a CRS URN * corresponds to a CRS with y,x axis order. Member names are CRS URNs * and values are boolean. By default, the following CRS URN are * assumed to correspond to a CRS with y,x axis order: * * * urn:ogc:def:crs:EPSG::4326 */ yx: { "urn:ogc:def:crs:EPSG::4326": true }, /** * Constructor: OpenLayers.Format.WMTSCapabilities * Create a new parser for WMTS capabilities. * * Parameters: * options - {Object} An optional object whose properties will be set on * this instance. */ initialize: function(options) { OpenLayers.Format.XML.prototype.initialize.apply(this, [options]); this.options = options; }, /** * APIMethod: read * Read capabilities data from a string, and return information about * the service (offering and observedProperty mostly). * * Parameters: * data - {String} or {DOMElement} data to read/parse. * * Returns: * {Object} Info about the WMTS Capabilities */ read: function(data) { if (typeof data == "string") { data = OpenLayers.Format.XML.prototype.read.apply(this, [data]); } var root = data.documentElement; var version = this.version || root.getAttribute("version") || this.defaultVersion; if (!this.parser || this.parser.version !== version) { var constr = OpenLayers.Format.WMTSCapabilities[ "v" + version.replace(/\./g, "_") ]; if (!constr) { throw new Error("Can't find a WMTS capabilities parser for version " + version); } this.parser = new constr(this.options); } return this.parser.read(data); }, /** * APIMethod: createLayer * Create a WMTS layer given a capabilities object. * * Parameters: * capabilities - {Object} The object returned from a <read> call to this * format. * config - {Object} Configuration properties for the layer. Defaults for * the layer will apply if not provided. * * Required config properties: * layer - {String} The layer identifier. * matrixSet - {String} The matrix set identifier. * * Returns: * {<OpenLayers.Layer.WMTS>} A properly configured WMTS layer. Throws an * error if an incomplete config is provided. Returns undefined if no * layer could be created with the provided config. */ createLayer: function(capabilities, config) { var layer; // confirm required properties are supplied in config var required = { layer: true, matrixSet: true }; for (var prop in required) { if (!(prop in config)) { throw new Error("Missing property '" + prop + "' in layer configuration."); } } var contents = capabilities.contents; var matrixSet = contents.tileMatrixSets[config.matrixSet]; // find the layer definition with the given identifier var layers = contents.layers; var layerDef; for (var i=0, ii=contents.layers.length; i<ii; ++i) { if (contents.layers[i].identifier === config.layer) { layerDef = contents.layers[i]; break; } } if (layerDef && matrixSet) { // get the default style for the layer var style; for (var i=0, ii=layerDef.styles.length; i<ii; ++i) { style = layerDef.styles[i]; if (style.isDefault) { break; } } layer = new OpenLayers.Layer.WMTS( OpenLayers.Util.applyDefaults(config, { url: capabilities.operationsMetadata.GetTile.dcp.http.get, name: layerDef.title, style: style, matrixIds: matrixSet.matrixIds }) ); } return layer; }, CLASS_NAME: "OpenLayers.Format.WMTSCapabilities" }); |