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Viewing file: Protocol.js (7.72 KB) -rw-rw-rw- Select action/file-type: (+) | (+) | (+) | Code (+) | Session (+) | (+) | SDB (+) | (+) | (+) | (+) | (+) | (+) | /* 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. */ /** * Class: OpenLayers.Protocol * Abstract vector layer protocol class. Not to be instantiated directly. Use * one of the protocol subclasses instead. */ OpenLayers.Protocol = OpenLayers.Class({ /** * Property: format * {<OpenLayers.Format>} The format used by this protocol. */ format: null, /** * Property: options * {Object} Any options sent to the constructor. */ options: null, /** * Property: autoDestroy * {Boolean} The creator of the protocol can set autoDestroy to false * to fully control when the protocol is destroyed. Defaults to * true. */ autoDestroy: true, /** * Property: defaultFilter * {OpenLayers.Filter} Optional default filter to read requests */ defaultFilter: null, /** * Constructor: OpenLayers.Protocol * Abstract class for vector protocols. Create instances of a subclass. * * Parameters: * options - {Object} Optional object whose properties will be set on the * instance. */ initialize: function(options) { options = options || {}; OpenLayers.Util.extend(this, options); this.options = options; }, /** * Method: mergeWithDefaultFilter * Merge filter passed to the read method with the default one * * Parameters: * filter - {OpenLayers.Filter} */ mergeWithDefaultFilter: function(filter) { var merged; if (filter && this.defaultFilter) { merged = new OpenLayers.Filter.Logical({ type: OpenLayers.Filter.Logical.AND, filters: [this.defaultFilter, filter] }); } else { merged = filter || this.defaultFilter || undefined; } return merged; }, /** * APIMethod: destroy * Clean up the protocol. */ destroy: function() { this.options = null; this.format = null; }, /** * APIMethod: read * Construct a request for reading new features. * * Parameters: * options - {Object} Optional object for configuring the request. * * Returns: * {<OpenLayers.Protocol.Response>} An <OpenLayers.Protocol.Response> * object, the same object will be passed to the callback function passed * if one exists in the options object. */ read: function(options) { options = options || {}; options.filter = this.mergeWithDefaultFilter(options.filter); }, /** * APIMethod: create * Construct a request for writing newly created features. * * Parameters: * features - {Array({<OpenLayers.Feature.Vector>})} or * {<OpenLayers.Feature.Vector>} * options - {Object} Optional object for configuring the request. * * Returns: * {<OpenLayers.Protocol.Response>} An <OpenLayers.Protocol.Response> * object, the same object will be passed to the callback function passed * if one exists in the options object. */ create: function() { }, /** * APIMethod: update * Construct a request updating modified features. * * Parameters: * features - {Array({<OpenLayers.Feature.Vector>})} or * {<OpenLayers.Feature.Vector>} * options - {Object} Optional object for configuring the request. * * Returns: * {<OpenLayers.Protocol.Response>} An <OpenLayers.Protocol.Response> * object, the same object will be passed to the callback function passed * if one exists in the options object. */ update: function() { }, /** * APIMethod: delete * Construct a request deleting a removed feature. * * Parameters: * feature - {<OpenLayers.Feature.Vector>} * options - {Object} Optional object for configuring the request. * * Returns: * {<OpenLayers.Protocol.Response>} An <OpenLayers.Protocol.Response> * object, the same object will be passed to the callback function passed * if one exists in the options object. */ "delete": function() { }, /** * APIMethod: commit * Go over the features and for each take action * based on the feature state. Possible actions are create, * update and delete. * * Parameters: * features - {Array({<OpenLayers.Feature.Vector>})} * options - {Object} Object whose possible keys are "create", "update", * "delete", "callback" and "scope", the values referenced by the * first three are objects as passed to the "create", "update", and * "delete" methods, the value referenced by the "callback" key is * a function which is called when the commit operation is complete * using the scope referenced by the "scope" key. * * Returns: * {Array({<OpenLayers.Protocol.Response>})} An array of * <OpenLayers.Protocol.Response> objects. */ commit: function() { }, /** * Method: abort * Abort an ongoing request. * * Parameters: * response - {<OpenLayers.Protocol.Response>} */ abort: function(response) { }, /** * Method: createCallback * Returns a function that applies the given public method with resp and * options arguments. * * Parameters: * method - {Function} The method to be applied by the callback. * response - {<OpenLayers.Protocol.Response>} The protocol response object. * options - {Object} Options sent to the protocol method */ createCallback: function(method, response, options) { return OpenLayers.Function.bind(function() { method.apply(this, [response, options]); }, this); }, CLASS_NAME: "OpenLayers.Protocol" }); /** * Class: OpenLayers.Protocol.Response * Protocols return Response objects to their users. */ OpenLayers.Protocol.Response = OpenLayers.Class({ /** * Property: code * {Number} - OpenLayers.Protocol.Response.SUCCESS or * OpenLayers.Protocol.Response.FAILURE */ code: null, /** * Property: requestType * {String} The type of request this response corresponds to. Either * "create", "read", "update" or "delete". */ requestType: null, /** * Property: last * {Boolean} - true if this is the last response expected in a commit, * false otherwise, defaults to true. */ last: true, /** * Property: features * {Array({<OpenLayers.Feature.Vector>})} or {<OpenLayers.Feature.Vector>} * The features returned in the response by the server. */ features: null, /** * Property: reqFeatures * {Array({<OpenLayers.Feature.Vector>})} or {<OpenLayers.Feature.Vector>} * The features provided by the user and placed in the request by the * protocol. */ reqFeatures: null, /** * Property: priv */ priv: null, /** * Constructor: OpenLayers.Protocol.Response * * Parameters: * options - {Object} Optional object whose properties will be set on the * instance. */ initialize: function(options) { OpenLayers.Util.extend(this, options); }, /** * Method: success * * Returns: * {Boolean} - true on success, false otherwise */ success: function() { return this.code > 0; }, CLASS_NAME: "OpenLayers.Protocol.Response" }); OpenLayers.Protocol.Response.SUCCESS = 1; OpenLayers.Protocol.Response.FAILURE = 0; |
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