[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 | /** api: (define) |
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| 10 | * module = GeoExt.data |
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| 11 | * class = WMSDescribeLayerReader |
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| 12 | * base_link = `Ext.data.DataReader <http://dev.sencha.com/deploy/dev/docs/?class=Ext.data.DataReader>`_ |
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| 13 | */ |
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| 14 | Ext.namespace("GeoExt.data"); |
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| 15 | |
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| 16 | /** api: constructor |
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| 17 | * .. class:: WMSDescribeLayerReader(meta, recordType) |
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| 18 | * |
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| 19 | * :param meta: ``Object`` Reader configuration. |
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| 20 | * :param recordType: ``Array | Ext.data.Record`` An array of field |
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| 21 | * configuration objects or a record object. Default has |
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| 22 | * fields for owsType, owsURL, and typeName. |
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| 23 | * |
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| 24 | * Data reader class to create an array of |
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| 25 | * layer description objects from a WMS DescribeLayer |
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| 26 | * response. |
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| 27 | */ |
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| 28 | GeoExt.data.WMSDescribeLayerReader = function(meta, recordType) { |
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| 29 | meta = meta || {}; |
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| 30 | if(!meta.format) { |
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| 31 | meta.format = new OpenLayers.Format.WMSDescribeLayer(); |
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| 32 | } |
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| 33 | if(!(typeof recordType === "function")) { |
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| 34 | recordType = Ext.data.Record.create( |
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| 35 | recordType || meta.fields || [ |
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| 36 | {name: "owsType", type: "string"}, |
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| 37 | {name: "owsURL", type: "string"}, |
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| 38 | {name: "typeName", type: "string"} |
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| 39 | ] |
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| 40 | ); |
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| 41 | } |
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| 42 | GeoExt.data.WMSDescribeLayerReader.superclass.constructor.call( |
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| 43 | this, meta, recordType |
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| 44 | ); |
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| 45 | }; |
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| 46 | |
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| 47 | Ext.extend(GeoExt.data.WMSDescribeLayerReader, Ext.data.DataReader, { |
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| 48 | |
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| 49 | /** private: method[read] |
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| 50 | * :param request: ``Object`` The XHR object which contains the parsed XML |
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| 51 | * document. |
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| 52 | * :return: ``Object`` A data block which is used by an ``Ext.data.Store`` |
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| 53 | * as a cache of ``Ext.data.Record`` objects. |
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| 54 | */ |
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| 55 | read: function(request) { |
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| 56 | var data = request.responseXML; |
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| 57 | if(!data || !data.documentElement) { |
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| 58 | data = request.responseText; |
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| 59 | } |
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| 60 | return this.readRecords(data); |
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| 61 | }, |
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| 62 | |
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| 63 | /** private: method[readRecords] |
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| 64 | * :param data: ``DOMElement | Strint | Object`` A document element or XHR |
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| 65 | * response string. As an alternative to fetching layer description data |
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| 66 | * from a remote source, an object representing the layer descriptions can |
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| 67 | * be provided given that the structure mirrors that returned from the |
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| 68 | * layer description parser. |
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| 69 | * :return: ``Object`` A data block which is used by an ``Ext.data.Store`` |
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| 70 | * as a cache of ``Ext.data.Record`` objects. |
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| 71 | * |
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| 72 | * Create a data block containing Ext.data.Records from an XML document. |
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| 73 | */ |
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| 74 | readRecords: function(data) { |
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| 75 | |
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| 76 | if(typeof data === "string" || data.nodeType) { |
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| 77 | data = this.meta.format.read(data); |
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| 78 | } |
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| 79 | var records = [], description; |
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| 80 | for(var i=0, len=data.length; i<len; i++){ |
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| 81 | description = data[i]; |
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| 82 | if(description) { |
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| 83 | records.push(new this.recordType(description)); |
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| 84 | } |
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| 85 | } |
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| 86 | |
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| 87 | return { |
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| 88 | totalRecords: records.length, |
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| 89 | success: true, |
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| 90 | records: records |
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| 91 | }; |
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| 92 | |
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| 93 | } |
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| 94 | }); |
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