    /**
     * @class Ext.form.action.Action
     * @extends Ext.Base
     * <p>The subclasses of this class provide actions to perform upon {@link Ext.form.Basic Form}s.</p>
     * <p>Instances of this class are only created by a {@link Ext.form.Basic Form} when
     * the Form needs to perform an action such as submit or load. The Configuration options
     * listed for this class are set through the Form's action methods: {@link Ext.form.Basic#submit submit},
     * {@link Ext.form.Basic#load load} and {@link Ext.form.Basic#doAction doAction}</p>
     * <p>The instance of Action which performed the action is passed to the success
     * and failure callbacks of the Form's action methods ({@link Ext.form.Basic#submit submit},
     * {@link Ext.form.Basic#load load} and {@link Ext.form.Basic#doAction doAction}),
     * and to the {@link Ext.form.Basic#actioncomplete actioncomplete} and
     * {@link Ext.form.Basic#actionfailed actionfailed} event handlers.</p>
     * @constructor
     * @param {Object} config The configuration for this instance.
     */
    Ext.define('Ext.form.action.Action', {
        alternateClassName: 'Ext.form.Action',

        /**
         * @cfg {Ext.form.Basic} form The {@link Ext.form.Basic BasicForm} instance that
         * is invoking this Action. Required.
         */

        /**
         * @cfg {String} url The URL that the Action is to invoke. Will default to the {@link Ext.form.Basic#url url}
         * configured on the {@link #form}.
         */

        /**
         * @cfg {Boolean} reset When set to <tt><b>true</b></tt>, causes the Form to be
         * {@link Ext.form.Basic#reset reset} on Action success. If specified, this happens
         * before the {@link #success} callback is called and before the Form's
         * {@link Ext.form.Basic#actioncomplete actioncomplete} event fires.
         */

        /**
         * @cfg {String} method The HTTP method to use to access the requested URL. Defaults to the
         * {@link Ext.form.Basic#method BasicForm's method}, or 'POST' if not specified.
         */

        /**
         * @cfg {Object/String} params <p>Extra parameter values to pass. These are added to the Form's
         * {@link Ext.form.Basic#baseParams} and passed to the specified URL along with the Form's
         * input fields.</p>
         * <p>Parameters are encoded as standard HTTP parameters using {@link Ext#urlEncode Ext.Object.toQueryString}.</p>
         */

        /**
         * @cfg {Object} headers <p>Extra headers to be sent in the AJAX request for submit and load actions. See
         * {@link Ext.data.Connection#headers}.</p>
         */

        /**
         * @cfg {Number} timeout The number of seconds to wait for a server response before
         * failing with the {@link #failureType} as {@link Ext.form.action.Action#CONNECT_FAILURE}. If not specified,
         * defaults to the configured <tt>{@link Ext.form.Basic#timeout timeout}</tt> of the
         * {@link #form}.
         */

        /**
         * @cfg {Function} success The function to call when a valid success return packet is received.
         * The function is passed the following parameters:<ul class="mdetail-params">
         * <li><b>form</b> : Ext.form.Basic<div class="sub-desc">The form that requested the action</div></li>
         * <li><b>action</b> : Ext.form.action.Action<div class="sub-desc">The Action class. The {@link #result}
         * property of this object may be examined to perform custom postprocessing.</div></li>
         * </ul>
         */

        /**
         * @cfg {Function} failure The function to call when a failure packet was received, or when an
         * error ocurred in the Ajax communication.
         * The function is passed the following parameters:<ul class="mdetail-params">
         * <li><b>form</b> : Ext.form.Basic<div class="sub-desc">The form that requested the action</div></li>
         * <li><b>action</b> : Ext.form.action.Action<div class="sub-desc">The Action class. If an Ajax
         * error ocurred, the failure type will be in {@link #failureType}. The {@link #result}
         * property of this object may be examined to perform custom postprocessing.</div></li>
         * </ul>
         */

        /**
         * @cfg {Object} scope The scope in which to call the configured <tt>success</tt> and <tt>failure</tt>
         * callback functions (the <tt>this</tt> reference for the callback functions).
         */

        /**
         * @cfg {String} waitMsg The message to be displayed by a call to {@link Ext.window.MessageBox#wait}
         * during the time the action is being processed.
         */

        /**
         * @cfg {String} waitTitle The title to be displayed by a call to {@link Ext.window.MessageBox#wait}
         * during the time the action is being processed.
         */

        /**
         * @cfg {Boolean} submitEmptyText If set to <tt>true</tt>, the emptyText value will be sent with the form
         * when it is submitted. Defaults to <tt>true</tt>.
         */

        /**
         * @property type
         * The type of action this Action instance performs.
         * Currently only "submit" and "load" are supported.
         * @type {String}
         */

        /**
         * The type of failure detected will be one of these: {@link Ext.form.action.Action#CLIENT_INVALID},
         * {@link Ext.form.action.Action#SERVER_INVALID}, {@link Ext.form.action.Action#CONNECT_FAILURE}, or
         * {@link Ext.form.action.Action#LOAD_FAILURE}.  Usage:
         * <pre><code>
    var fp = new Ext.form.Panel({
    ...
    buttons: [{
        text: 'Save',
        formBind: true,
        handler: function(){
            if(fp.getForm().isValid()){
                fp.getForm().submit({
                    url: 'form-submit.php',
                    waitMsg: 'Submitting your data...',
                    success: function(form, action){
                        // server responded with success = true
                        var result = action.{@link #result};
                    },
                    failure: function(form, action){
                        if (action.{@link #failureType} === {@link Ext.form.action.Action#CONNECT_FAILURE}) {
                            Ext.Msg.alert('Error',
                                'Status:'+action.{@link #response}.status+': '+
                                action.{@link #response}.statusText);
                        }
                        if (action.failureType === {@link Ext.form.action.Action#SERVER_INVALID}){
                            // server responded with success = false
                            Ext.Msg.alert('Invalid', action.{@link #result}.errormsg);
                        }
                    }
                });
            }
        }
    },{
        text: 'Reset',
        handler: function(){
            fp.getForm().reset();
        }
    }]
         * </code></pre>
         * @property failureType
         * @type {String}
         */

        /**
         * The raw XMLHttpRequest object used to perform the action.
         * @property response
         * @type {Object}
         */

        /**
         * The decoded response object containing a boolean <tt>success</tt> property and
         * other, action-specific properties.
         * @property result
         * @type {Object}
         */

        constructor: function(config) {
            if (config) {
                Ext.apply(this, config);
            }

            // Normalize the params option to an Object
            var params = config.params;
            if (Ext.isString(params)) {
                this.params = Ext.Object.fromQueryString(params);
            }
        },

        /**
         * Invokes this action using the current configuration.
         */
        run: Ext.emptyFn,

        /**
         * @private
         * @method onSuccess
         * Callback method that gets invoked when the action completes successfully. Must be implemented by subclasses.
         * @param {Object} response
         */

        /**
         * @private
         * @method handleResponse
         * Handles the raw response and builds a result object from it. Must be implemented by subclasses.
         * @param {Object} response
         */

        /**
         * @private
         * Handles a failure response.
         * @param {Object} response
         */
        onFailure : function(response){
            this.response = response;
            this.failureType = Ext.form.action.Action.CONNECT_FAILURE;
            this.form.afterAction(this, false);
        },

        /**
         * @private
         * Validates that a response contains either responseText or responseXML and invokes
         * {@link #handleResponse} to build the result object.
         * @param {Object} response The raw response object.
         * @return {Object/Boolean} result The result object as built by handleResponse, or <tt>true</tt> if
         *                         the response had empty responseText and responseXML.
         */
        processResponse : function(response){
            this.response = response;
            if (!response.responseText && !response.responseXML) {
                return true;
            }
            return (this.result = this.handleResponse(response));
        },

        /**
         * @private
         * Build the URL for the AJAX request. Used by the standard AJAX submit and load actions.
         * @return {String} The URL.
         */
        getUrl: function() {
            return this.url || this.form.url;
        },

        /**
         * @private
         * Determine the HTTP method to be used for the request.
         * @return {String} The HTTP method
         */
        getMethod: function() {
            return (this.method || this.form.method || 'POST').toUpperCase();
        },

        /**
         * @private
         * Get the set of parameters specified in the BasicForm's baseParams and/or the params option.
         * Items in params override items of the same name in baseParams.
         * @return {Object} the full set of parameters
         */
        getParams: function() {
            return Ext.apply({}, this.params, this.form.baseParams);
        },

        /**
         * @private
         * Creates a callback object.
         */
        createCallback: function() {
            var me = this,
                undef,
                form = me.form;
            return {
                success: me.onSuccess,
                failure: me.onFailure,
                scope: me,
                timeout: (this.timeout * 1000) || (form.timeout * 1000),
                upload: form.fileUpload ? me.onSuccess : undef
            };
        },

        statics: {
            /**
             * @property CLIENT_INVALID
             * Failure type returned when client side validation of the Form fails
             * thus aborting a submit action. Client side validation is performed unless
             * {@link Ext.form.action.Submit#clientValidation} is explicitly set to <tt>false</tt>.
             * @type {String}
             * @static
             */
            CLIENT_INVALID: 'client',

            /**
             * @property SERVER_INVALID
             * <p>Failure type returned when server side processing fails and the {@link #result}'s
             * <tt>success</tt> property is set to <tt>false</tt>.</p>
             * <p>In the case of a form submission, field-specific error messages may be returned in the
             * {@link #result}'s <tt>errors</tt> property.</p>
             * @type {String}
             * @static
             */
            SERVER_INVALID: 'server',

            /**
             * @property CONNECT_FAILURE
             * Failure type returned when a communication error happens when attempting
             * to send a request to the remote server. The {@link #response} may be examined to
             * provide further information.
             * @type {String}
             * @static
             */
            CONNECT_FAILURE: 'connect',

            /**
             * @property LOAD_FAILURE
             * Failure type returned when the response's <tt>success</tt>
             * property is set to <tt>false</tt>, or no field values are returned in the response's
             * <tt>data</tt> property.
             * @type {String}
             * @static
             */
            LOAD_FAILURE: 'load'

        }
    });