[76] | 1 | /** |
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| 2 | * Copyright (c) 2008-2010 The Open Source Geospatial Foundation |
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| 3 | * |
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| 4 | * Published under the BSD license. |
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| 5 | * See http://svn.geoext.org/core/trunk/geoext/license.txt for the full text |
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| 6 | * of the license. |
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| 7 | */ |
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| 8 | |
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| 9 | /** |
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| 10 | * @include GeoExt/data/LayerRecord.js |
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| 11 | */ |
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| 12 | |
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| 13 | /** api: (define) |
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| 14 | * module = GeoExt.data |
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| 15 | * class = WMCReader |
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| 16 | * base_link = `Ext.data.DataReader <http://dev.sencha.com/deploy/dev/docs/?class=Ext.data.DataReader>`_ |
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| 17 | */ |
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| 18 | Ext.namespace("GeoExt.data"); |
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| 19 | |
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| 20 | /** api: constructor |
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| 21 | * .. class:: WMCReader(meta, recordType) |
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| 22 | * |
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| 23 | * :param meta: ``Object`` Reader configuration. |
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| 24 | * :param recordType: ``Array | Ext.data.Record`` An array of field |
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| 25 | * configuration objects or a record object. Default is |
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| 26 | * :class:`GeoExt.data.LayerRecord`. |
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| 27 | * |
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| 28 | * Data reader class to create an array of |
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| 29 | * :class:`GeoExt.data.LayerRecord` objects from a WMS GetCapabilities |
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| 30 | * response. |
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| 31 | */ |
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| 32 | GeoExt.data.WMCReader = function(meta, recordType) { |
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| 33 | meta = meta || {}; |
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| 34 | if(!meta.format) { |
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| 35 | meta.format = new OpenLayers.Format.WMC(); |
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| 36 | } |
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| 37 | if(!(typeof recordType === "function")) { |
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| 38 | recordType = GeoExt.data.LayerRecord.create( |
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| 39 | recordType || meta.fields || [ |
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| 40 | // give only non-OpenLayers fields as default recordType |
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| 41 | {name: "abstract", type: "string"}, |
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| 42 | {name: "metadataURL", type: "string"}, |
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| 43 | {name: "queryable", type: "boolean"}, |
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| 44 | {name: "formats"}, // array |
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| 45 | {name: "styles"} // array |
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| 46 | ] |
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| 47 | ); |
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| 48 | } |
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| 49 | GeoExt.data.WMCReader.superclass.constructor.call( |
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| 50 | this, meta, recordType |
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| 51 | ); |
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| 52 | }; |
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| 53 | |
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| 54 | Ext.extend(GeoExt.data.WMCReader, Ext.data.DataReader, { |
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| 55 | |
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| 56 | /** private: method[read] |
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| 57 | * :param request: ``Object`` The XHR object which contains the parsed XML |
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| 58 | * document. |
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| 59 | * :return: ``Object`` A data block which is used by an ``Ext.data.Store`` |
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| 60 | * as a cache of ``Ext.data.Record`` objects. |
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| 61 | */ |
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| 62 | read: function(request) { |
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| 63 | var data = request.responseXML; |
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| 64 | if(!data || !data.documentElement) { |
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| 65 | data = request.responseText; |
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| 66 | } |
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| 67 | return this.readRecords(data); |
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| 68 | }, |
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| 69 | |
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| 70 | /** private: method[readRecords] |
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| 71 | * :param data: ``DOMElement | String | Object`` A document element or XHR |
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| 72 | * response string. As an alternative to fetching capabilities data |
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| 73 | * from a remote source, an object representing the capabilities can |
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| 74 | * be provided given that the structure mirrors that returned from the |
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| 75 | * capabilities parser. |
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| 76 | * :return: ``Object`` A data block which is used by an ``Ext.data.Store`` |
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| 77 | * as a cache of ``Ext.data.Record`` objects. |
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| 78 | * |
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| 79 | * Create a data block containing Ext.data.Records from an XML document. |
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| 80 | */ |
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| 81 | readRecords: function(data) { |
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| 82 | var format = this.meta.format; |
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| 83 | if(typeof data === "string" || data.nodeType) { |
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| 84 | data = format.read(data); |
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| 85 | } |
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| 86 | var layersContext = data ? data.layersContext : undefined; |
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| 87 | var records = []; |
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| 88 | |
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| 89 | if(layersContext) { |
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| 90 | var recordType = this.recordType, fields = recordType.prototype.fields; |
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| 91 | var i, lenI, j, lenJ, layerContext, values, field, v; |
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| 92 | for (i = 0, lenI = layersContext.length; i < lenI; i++) { |
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| 93 | layerContext = layersContext[i]; |
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| 94 | values = {}; |
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| 95 | for(j = 0, lenJ = fields.length; j < lenJ; j++){ |
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| 96 | field = fields.items[j]; |
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| 97 | v = layerContext[field.mapping || field.name] || |
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| 98 | field.defaultValue; |
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| 99 | v = field.convert(v); |
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| 100 | values[field.name] = v; |
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| 101 | } |
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| 102 | values.layer = format.getLayerFromContext(layerContext); |
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| 103 | records.push(new this.recordType(values, values.layer.id)); |
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| 104 | } |
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| 105 | } |
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| 106 | |
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| 107 | return { |
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| 108 | totalRecords: records.length, |
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| 109 | success: true, |
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| 110 | records: records |
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| 111 | }; |
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| 112 | |
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| 113 | } |
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| 114 | |
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| 115 | }); |
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| 116 | |
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