Either an Array of {@link Ext.data.Field Field} definition objects (which - * will be passed to {@link Ext.data.Record#create}, or a {@link Ext.data.Record Record} - * constructor created using {@link Ext.data.Record#create}.
- */ -Ext.data.DataReader = function(meta, recordType){ - /** - * This DataReader's configured metadata as passed to the constructor. - * @type Mixed - * @property meta - */ - this.meta = meta; - /** - * @cfg {Array/Object} fields - *Either an Array of {@link Ext.data.Field Field} definition objects (which - * will be passed to {@link Ext.data.Record#create}, or a {@link Ext.data.Record Record} - * constructor created from {@link Ext.data.Record#create}.
- */ - this.recordType = Ext.isArray(recordType) ? - Ext.data.Record.create(recordType) : recordType; +/** + * @class Ext.data.DataReader + * Abstract base class for reading structured data from a data source and converting + * it into an object containing {@link Ext.data.Record} objects and metadata for use + * by an {@link Ext.data.Store}. This class is intended to be extended and should not + * be created directly. For existing implementations, see {@link Ext.data.ArrayReader}, + * {@link Ext.data.JsonReader} and {@link Ext.data.XmlReader}. + * @constructor Create a new DataReader + * @param {Object} meta Metadata configuration options (implementation-specific). + * @param {Array/Object} recordType + *Either an Array of {@link Ext.data.Field Field} definition objects (which + * will be passed to {@link Ext.data.Record#create}, or a {@link Ext.data.Record Record} + * constructor created using {@link Ext.data.Record#create}.
+ */ +Ext.data.DataReader = function(meta, recordType){ + /** + * This DataReader's configured metadata as passed to the constructor. + * @type Mixed + * @property meta + */ + this.meta = meta; + /** + * @cfg {Array/Object} fields + *Either an Array of {@link Ext.data.Field Field} definition objects (which + * will be passed to {@link Ext.data.Record#create}, or a {@link Ext.data.Record Record} + * constructor created from {@link Ext.data.Record#create}.
+ */ + this.recordType = Ext.isArray(recordType) ? + Ext.data.Record.create(recordType) : recordType; + + // if recordType defined make sure extraction functions are defined + if (this.recordType){ + this.buildExtractors(); + } +}; + +Ext.data.DataReader.prototype = { + /** + * @cfg {String} messageProperty [undefined] Optional name of a property within a server-response that represents a user-feedback message. + */ + /** + * Abstract method created in extension's buildExtractors impl. + */ + getTotal: Ext.emptyFn, + /** + * Abstract method created in extension's buildExtractors impl. + */ + getRoot: Ext.emptyFn, + /** + * Abstract method created in extension's buildExtractors impl. + */ + getMessage: Ext.emptyFn, + /** + * Abstract method created in extension's buildExtractors impl. + */ + getSuccess: Ext.emptyFn, + /** + * Abstract method created in extension's buildExtractors impl. + */ + getId: Ext.emptyFn, + /** + * Abstract method, overridden in DataReader extensions such as {@link Ext.data.JsonReader} and {@link Ext.data.XmlReader} + */ + buildExtractors : Ext.emptyFn, + /** + * Abstract method overridden in DataReader extensions such as {@link Ext.data.JsonReader} and {@link Ext.data.XmlReader} + */ + extractValues : Ext.emptyFn, + + /** + * Used for un-phantoming a record after a successful database insert. Sets the records pk along with new data from server. + * You must return at least the database pk using the idProperty defined in your DataReader configuration. The incoming + * data from server will be merged with the data in the local record. + * In addition, you must return record-data from the server in the same order received. + * Will perform a commit as well, un-marking dirty-fields. Store's "update" event will be suppressed. + * @param {Record/Record[]} record The phantom record to be realized. + * @param {Object/Object[]} data The new record data to apply. Must include the primary-key from database defined in idProperty field. + */ + realize: function(rs, data){ + if (Ext.isArray(rs)) { + for (var i = rs.length - 1; i >= 0; i--) { + // recurse + if (Ext.isArray(data)) { + this.realize(rs.splice(i,1).shift(), data.splice(i,1).shift()); + } + else { + // weird...rs is an array but data isn't?? recurse but just send in the whole invalid data object. + // the else clause below will detect !this.isData and throw exception. + this.realize(rs.splice(i,1).shift(), data); + } + } + } + else { + // If rs is NOT an array but data IS, see if data contains just 1 record. If so extract it and carry on. + if (Ext.isArray(data) && data.length == 1) { + data = data.shift(); + } + if (!this.isData(data)) { + // TODO: Let exception-handler choose to commit or not rather than blindly rs.commit() here. + //rs.commit(); + throw new Ext.data.DataReader.Error('realize', rs); + } + rs.phantom = false; // <-- That's what it's all about + rs._phid = rs.id; // <-- copy phantom-id -> _phid, so we can remap in Store#onCreateRecords + rs.id = this.getId(data); + rs.data = data; + + rs.commit(); + } + }, + + /** + * Used for updating a non-phantom or "real" record's data with fresh data from server after remote-save. + * If returning data from multiple-records after a batch-update, you must return record-data from the server in + * the same order received. Will perform a commit as well, un-marking dirty-fields. Store's "update" event will be + * suppressed as the record receives fresh new data-hash + * @param {Record/Record[]} rs + * @param {Object/Object[]} data + */ + update : function(rs, data) { + if (Ext.isArray(rs)) { + for (var i=rs.length-1; i >= 0; i--) { + if (Ext.isArray(data)) { + this.update(rs.splice(i,1).shift(), data.splice(i,1).shift()); + } + else { + // weird...rs is an array but data isn't?? recurse but just send in the whole data object. + // the else clause below will detect !this.isData and throw exception. + this.update(rs.splice(i,1).shift(), data); + } + } + } + else { + // If rs is NOT an array but data IS, see if data contains just 1 record. If so extract it and carry on. + if (Ext.isArray(data) && data.length == 1) { + data = data.shift(); + } + if (this.isData(data)) { + rs.data = Ext.apply(rs.data, data); + } + rs.commit(); + } + }, - // if recordType defined make sure extraction functions are defined - if (this.recordType){ - this.buildExtractors(); + /** + * returns extracted, type-cast rows of data. Iterates to call #extractValues for each row + * @param {Object[]/Object} data-root from server response + * @param {Boolean} returnRecords [false] Set true to return instances of Ext.data.Record + * @private + */ + extractData : function(root, returnRecords) { + // A bit ugly this, too bad the Record's raw data couldn't be saved in a common property named "raw" or something. + var rawName = (this instanceof Ext.data.JsonReader) ? 'json' : 'node'; + + var rs = []; + + // Had to add Check for XmlReader, #isData returns true if root is an Xml-object. Want to check in order to re-factor + // #extractData into DataReader base, since the implementations are almost identical for JsonReader, XmlReader + if (this.isData(root) && !(this instanceof Ext.data.XmlReader)) { + root = [root]; + } + var f = this.recordType.prototype.fields, + fi = f.items, + fl = f.length, + rs = []; + if (returnRecords === true) { + var Record = this.recordType; + for (var i = 0; i < root.length; i++) { + var n = root[i]; + var record = new Record(this.extractValues(n, fi, fl), this.getId(n)); + record[rawName] = n; // <-- There's implementation of ugly bit, setting the raw record-data. + rs.push(record); + } + } + else { + for (var i = 0; i < root.length; i++) { + var data = this.extractValues(root[i], fi, fl); + data[this.meta.idProperty] = this.getId(root[i]); + rs.push(data); + } + } + return rs; + }, + + /** + * Returns true if the supplied data-hash looks and quacks like data. Checks to see if it has a key + * corresponding to idProperty defined in your DataReader config containing non-empty pk. + * @param {Object} data + * @return {Boolean} + */ + isData : function(data) { + return (data && Ext.isObject(data) && !Ext.isEmpty(this.getId(data))) ? true : false; + }, + + // private function a store will createSequence upon + onMetaChange : function(meta){ + delete this.ef; + this.meta = meta; + this.recordType = Ext.data.Record.create(meta.fields); + this.buildExtractors(); + } +}; + +/** + * @class Ext.data.DataReader.Error + * @extends Ext.Error + * General error class for Ext.data.DataReader + */ +Ext.data.DataReader.Error = Ext.extend(Ext.Error, { + constructor : function(message, arg) { + this.arg = arg; + Ext.Error.call(this, message); + }, + name: 'Ext.data.DataReader' +}); +Ext.apply(Ext.data.DataReader.Error.prototype, { + lang : { + 'update': "#update received invalid data from server. Please see docs for DataReader#update and review your DataReader configuration.", + 'realize': "#realize was called with invalid remote-data. Please see the docs for DataReader#realize and review your DataReader configuration.", + 'invalid-response': "#readResponse received an invalid response from the server." } -}; - -Ext.data.DataReader.prototype = { - /** - * @cfg {String} messageProperty [undefined] Optional name of a property within a server-response that represents a user-feedback message. - */ - /** - * Abstract method created in extension's buildExtractors impl. - */ - getTotal: Ext.emptyFn, - /** - * Abstract method created in extension's buildExtractors impl. - */ - getRoot: Ext.emptyFn, - /** - * Abstract method created in extension's buildExtractors impl. - */ - getMessage: Ext.emptyFn, - /** - * Abstract method created in extension's buildExtractors impl. - */ - getSuccess: Ext.emptyFn, - /** - * Abstract method created in extension's buildExtractors impl. - */ - getId: Ext.emptyFn, - /** - * Abstract method, overridden in DataReader extensions such as {@link Ext.data.JsonReader} and {@link Ext.data.XmlReader} - */ - buildExtractors : Ext.emptyFn, - /** - * Abstract method overridden in DataReader extensions such as {@link Ext.data.JsonReader} and {@link Ext.data.XmlReader} - */ - extractData : Ext.emptyFn, - /** - * Abstract method overridden in DataReader extensions such as {@link Ext.data.JsonReader} and {@link Ext.data.XmlReader} - */ - extractValues : Ext.emptyFn, - - /** - * Used for un-phantoming a record after a successful database insert. Sets the records pk along with new data from server. - * You must return at least the database pk using the idProperty defined in your DataReader configuration. The incoming - * data from server will be merged with the data in the local record. - * In addition, you must return record-data from the server in the same order received. - * Will perform a commit as well, un-marking dirty-fields. Store's "update" event will be suppressed. - * @param {Record/Record[]} record The phantom record to be realized. - * @param {Object/Object[]} data The new record data to apply. Must include the primary-key from database defined in idProperty field. - */ - realize: function(rs, data){ - if (Ext.isArray(rs)) { - for (var i = rs.length - 1; i >= 0; i--) { - // recurse - if (Ext.isArray(data)) { - this.realize(rs.splice(i,1).shift(), data.splice(i,1).shift()); - } - else { - // weird...rs is an array but data isn't?? recurse but just send in the whole invalid data object. - // the else clause below will detect !this.isData and throw exception. - this.realize(rs.splice(i,1).shift(), data); - } - } - } - else { - // If rs is NOT an array but data IS, see if data contains just 1 record. If so extract it and carry on. - if (Ext.isArray(data) && data.length == 1) { - data = data.shift(); - } - if (!this.isData(data)) { - // TODO: Let exception-handler choose to commit or not rather than blindly rs.commit() here. - //rs.commit(); - throw new Ext.data.DataReader.Error('realize', rs); - } - rs.phantom = false; // <-- That's what it's all about - rs._phid = rs.id; // <-- copy phantom-id -> _phid, so we can remap in Store#onCreateRecords - rs.id = this.getId(data); - - rs.fields.each(function(f) { - if (data[f.name] !== f.defaultValue) { - rs.data[f.name] = data[f.name]; - } - }); - rs.commit(); - } - }, - - /** - * Used for updating a non-phantom or "real" record's data with fresh data from server after remote-save. - * If returning data from multiple-records after a batch-update, you must return record-data from the server in - * the same order received. Will perform a commit as well, un-marking dirty-fields. Store's "update" event will be - * suppressed as the record receives fresh new data-hash - * @param {Record/Record[]} rs - * @param {Object/Object[]} data - */ - update : function(rs, data) { - if (Ext.isArray(rs)) { - for (var i=rs.length-1; i >= 0; i--) { - if (Ext.isArray(data)) { - this.update(rs.splice(i,1).shift(), data.splice(i,1).shift()); - } - else { - // weird...rs is an array but data isn't?? recurse but just send in the whole data object. - // the else clause below will detect !this.isData and throw exception. - this.update(rs.splice(i,1).shift(), data); - } - } - } - else { - // If rs is NOT an array but data IS, see if data contains just 1 record. If so extract it and carry on. - if (Ext.isArray(data) && data.length == 1) { - data = data.shift(); - } - if (this.isData(data)) { - rs.fields.each(function(f) { - if (data[f.name] !== f.defaultValue) { - rs.data[f.name] = data[f.name]; - } - }); - } - rs.commit(); - } - }, - - /** - * returns extracted, type-cast rows of data. Iterates to call #extractValues for each row - * @param {Object[]/Object} data-root from server response - * @param {Boolean} returnRecords [false] Set true to return instances of Ext.data.Record - * @private - */ - extractData : function(root, returnRecords) { - // A bit ugly this, too bad the Record's raw data couldn't be saved in a common property named "raw" or something. - var rawName = (this instanceof Ext.data.JsonReader) ? 'json' : 'node'; - - var rs = []; - - // Had to add Check for XmlReader, #isData returns true if root is an Xml-object. Want to check in order to re-factor - // #extractData into DataReader base, since the implementations are almost identical for JsonReader, XmlReader - if (this.isData(root) && !(this instanceof Ext.data.XmlReader)) { - root = [root]; - } - var f = this.recordType.prototype.fields, - fi = f.items, - fl = f.length, - rs = []; - if (returnRecords === true) { - var Record = this.recordType; - for (var i = 0; i < root.length; i++) { - var n = root[i]; - var record = new Record(this.extractValues(n, fi, fl), this.getId(n)); - record[rawName] = n; // <-- There's implementation of ugly bit, setting the raw record-data. - rs.push(record); - } - } - else { - for (var i = 0; i < root.length; i++) { - var data = this.extractValues(root[i], fi, fl); - data[this.meta.idProperty] = this.getId(root[i]); - rs.push(data); - } - } - return rs; - }, - - /** - * Returns true if the supplied data-hash looks and quacks like data. Checks to see if it has a key - * corresponding to idProperty defined in your DataReader config containing non-empty pk. - * @param {Object} data - * @return {Boolean} - */ - isData : function(data) { - return (data && Ext.isObject(data) && !Ext.isEmpty(this.getId(data))) ? true : false; - }, - - // private function a store will createSequence upon - onMetaChange : function(meta){ - delete this.ef; - this.meta = meta; - this.recordType = Ext.data.Record.create(meta.fields); - this.buildExtractors(); - } -}; - -/** - * @class Ext.data.DataReader.Error - * @extends Ext.Error - * General error class for Ext.data.DataReader - */ -Ext.data.DataReader.Error = Ext.extend(Ext.Error, { - constructor : function(message, arg) { - this.arg = arg; - Ext.Error.call(this, message); - }, - name: 'Ext.data.DataReader' -}); -Ext.apply(Ext.data.DataReader.Error.prototype, { - lang : { - 'update': "#update received invalid data from server. Please see docs for DataReader#update and review your DataReader configuration.", - 'realize': "#realize was called with invalid remote-data. Please see the docs for DataReader#realize and review your DataReader configuration.", - 'invalid-response': "#readResponse received an invalid response from the server." - } -}); +});