--- a/labs/openlayers/lib/OpenLayers/Protocol/WFS/v1.js +++ b/labs/openlayers/lib/OpenLayers/Protocol/WFS/v1.js @@ -1,1 +1,343 @@ - +/* 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/Protocol/WFS.js + */ + +/** + * Class: OpenLayers.Protocol.WFS.v1 + * Abstract class for for v1.0.0 and v1.1.0 protocol. + * + * Inherits from: + * - <OpenLayers.Protocol> + */ +OpenLayers.Protocol.WFS.v1 = OpenLayers.Class(OpenLayers.Protocol, { + + /** + * Property: version + * {String} WFS version number. + */ + version: null, + + /** + * Property: srsName + * {String} Name of spatial reference system. Default is "EPSG:4326". + */ + srsName: "EPSG:4326", + + /** + * Property: featureType + * {String} Local feature typeName. + */ + featureType: null, + + /** + * Property: featureNS + * {String} Feature namespace. + */ + featureNS: null, + + /** + * Property: geometryName + * {String} Name of the geometry attribute for features. Default is + * "the_geom". + */ + geometryName: "the_geom", + + /** + * Property: schema + * {String} Optional schema location that will be included in the + * schemaLocation attribute value. Note that the feature type schema + * is required for a strict XML validator (on transactions with an + * insert for example), but is *not* required by the WFS specification + * (since the server is supposed to know about feature type schemas). + */ + schema: null, + + /** + * Property: featurePrefix + * {String} Namespace alias for feature type. Default is "feature". + */ + featurePrefix: "feature", + + /** + * Property: formatOptions + * {Object} Optional options for the format. If a format is not provided, + * this property can be used to extend the default format options. + */ + formatOptions: null, + + /** + * Property: readFormat + * {<OpenLayers.Format>} For WFS requests it is possible to get a + * different output format than GML. In that case, we cannot parse + * the response with the default format (WFST) and we need a different + * format for reading. + */ + readFormat: null, + + /** + * Constructor: OpenLayers.Protocol.WFS + * A class for giving layers WFS protocol. + * + * Parameters: + * options - {Object} Optional object whose properties will be set on the + * instance. + * + * Valid options properties: + * url - {String} URL to send requests to (required). + * featureType - {String} Local (without prefix) feature typeName (required). + * featureNS - {String} Feature namespace (required, but can be autodetected + * for reading if featurePrefix is provided and identical to the prefix + * in the server response). + * featurePrefix - {String} Feature namespace alias (optional - only used + * for writing if featureNS is provided). Default is 'feature'. + * geometryName - {String} Name of geometry attribute. Default is 'the_geom'. + */ + initialize: function(options) { + OpenLayers.Protocol.prototype.initialize.apply(this, [options]); + if(!options.format) { + this.format = OpenLayers.Format.WFST(OpenLayers.Util.extend({ + version: this.version, + featureType: this.featureType, + featureNS: this.featureNS, + featurePrefix: this.featurePrefix, + geometryName: this.geometryName, + srsName: this.srsName, + schema: this.schema + }, this.formatOptions)); + } + if(!this.featureNS && this.featurePrefix) { + // featureNS autodetection + var readNode = this.format.readNode; + this.format.readNode = function(node, obj) { + if(!this.featureNS && node.prefix == this.featurePrefix) { + this.featureNS = node.namespaceURI; + this.setNamespace("feature", this.featureNS); + } + return readNode.apply(this, arguments); + }; + } + }, + + /** + * APIMethod: destroy + * Clean up the protocol. + */ + destroy: function() { + if(this.options && !this.options.format) { + this.format.destroy(); + } + this.format = null; + OpenLayers.Protocol.prototype.destroy.apply(this); + }, + + /** + * Method: read + * Construct a request for reading new features. Since WFS splits the + * basic CRUD operations into GetFeature requests (for read) and + * Transactions (for all others), this method does not make use of the + * format's read method (that is only about reading transaction + * responses). + */ + read: function(options) { + OpenLayers.Protocol.prototype.read.apply(this, arguments); + options = OpenLayers.Util.extend({}, options); + OpenLayers.Util.applyDefaults(options, this.options || {}); + var response = new OpenLayers.Protocol.Response({requestType: "read"}); + + var data = OpenLayers.Format.XML.prototype.write.apply( + this.format, [this.format.writeNode("wfs:GetFeature", options)] + ); + + response.priv = OpenLayers.Request.POST({ + url: options.url, + callback: this.createCallback(this.handleRead, response, options), + params: options.params, + headers: options.headers, + data: data + }); + + return response; + }, + + /** + * Method: handleRead + * Deal with response from the read request. + * + * Parameters: + * response - {<OpenLayers.Protocol.Response>} The response object to pass + * to the user callback. + * options - {Object} The user options passed to the read call. + */ + handleRead: function(response, options) { + if(options.callback) { + var request = response.priv; + if(request.status >= 200 && request.status < 300) { + // success + response.features = this.parseFeatures(request); + response.code = OpenLayers.Protocol.Response.SUCCESS; + } else { + // failure + response.code = OpenLayers.Protocol.Response.FAILURE; + } + options.callback.call(options.scope, response); + } + }, + + /** + * Method: parseFeatures + * Read HTTP response body and return features + * + * Parameters: + * request - {XMLHttpRequest} The request object + * + * Returns: + * {Array({<OpenLayers.Feature.Vector>})} or + * {<OpenLayers.Feature.Vector>} Array of features or a single feature. + */ + parseFeatures: function(request) { + var doc = request.responseXML; + if(!doc || !doc.documentElement) { + doc = request.responseText; + } + if(!doc || doc.length <= 0) { + return null; + } + return (this.readFormat !== null) ? this.readFormat.read(doc) : + this.format.read(doc); + }, + + /** + * Method: commit + * Given a list of feature, assemble a batch request for update, create, + * and delete transactions. A commit call on the prototype amounts + * to writing a WFS transaction - so the write method on the format + * is used. + * + * Parameters: + * features - {Array(<OpenLayers.Feature.Vector>} + * + * Returns: + * {<OpenLayers.Protocol.Response>} A response object with a features + * property containing any insertIds and a priv property referencing + * the XMLHttpRequest object. + */ + commit: function(features, options) { + + options = OpenLayers.Util.extend({}, options); + OpenLayers.Util.applyDefaults(options, this.options); + + var response = new OpenLayers.Protocol.Response({ + requestType: "commit", + reqFeatures: features + }); + response.priv = OpenLayers.Request.POST({ + url: options.url, + data: this.format.write(features, options), + callback: this.createCallback(this.handleCommit, response, options) + }); + + return response; + }, + + /** + * Method: handleCommit + * Called when the commit request returns. + * + * Parameters: + * response - {<OpenLayers.Protocol.Response>} The response object to pass + * to the user callback. + * options - {Object} The user options passed to the commit call. + */ + handleCommit: function(response, options) { + if(options.callback) { + var request = response.priv; + + // ensure that we have an xml doc + var data = request.responseXML; + if(!data || !data.documentElement) { + data = request.responseText; + } + + var obj = this.format.read(data) || {}; + + response.insertIds = obj.insertIds || []; + response.code = (obj.success) ? + OpenLayers.Protocol.Response.SUCCESS : + OpenLayers.Protocol.Response.FAILURE; + options.callback.call(options.scope, response); + } + }, + + /** + * Method: filterDelete + * Send a request that deletes all features by their filter. + * + * Parameters: + * filter - {OpenLayers.Filter} filter + */ + filterDelete: function(filter, options) { + options = OpenLayers.Util.extend({}, options); + OpenLayers.Util.applyDefaults(options, this.options); + + var response = new OpenLayers.Protocol.Response({ + requestType: "commit" + }); + + var root = this.format.createElementNSPlus("wfs:Transaction", { + attributes: { + service: "WFS", + version: this.version + } + }); + + var deleteNode = this.format.createElementNSPlus("wfs:Delete", { + attributes: { + typeName: (options.featureNS ? this.featurePrefix + ":" : "") + + options.featureType + } + }); + + if(options.featureNS) { + deleteNode.setAttribute("xmlns:" + this.featurePrefix, options.featureNS); + } + var filterNode = this.format.writeNode("ogc:Filter", filter); + + deleteNode.appendChild(filterNode); + + root.appendChild(deleteNode); + + var data = OpenLayers.Format.XML.prototype.write.apply( + this.format, [root] + ); + + return OpenLayers.Request.POST({ + url: this.url, + callback : options.callback || function(){}, + data: data + }); + + }, + + /** + * Method: abort + * Abort an ongoing request, the response object passed to + * this method must come from this protocol (as a result + * of a read, or commit operation). + * + * Parameters: + * response - {<OpenLayers.Protocol.Response>} + */ + abort: function(response) { + if (response) { + response.priv.abort(); + } + }, + + CLASS_NAME: "OpenLayers.Protocol.WFS.v1" +}); +