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dataschema-array-debug.js
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dataschema-array.js
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Editing: dataschema-array.js
YUI.add('dataschema-array', function (Y, NAME) { /** * Provides a DataSchema implementation which can be used to work with data * stored in arrays. * * @module dataschema * @submodule dataschema-array */ /** Provides a DataSchema implementation which can be used to work with data stored in arrays. See the `apply` method below for usage. @class DataSchema.Array @extends DataSchema.Base @static **/ var LANG = Y.Lang, SchemaArray = { //////////////////////////////////////////////////////////////////////// // // DataSchema.Array static methods // //////////////////////////////////////////////////////////////////////// /** Applies a schema to an array of data, returning a normalized object with results in the `results` property. The `meta` property of the response object is present for consistency, but is assigned an empty object. If the input data is absent or not an array, an `error` property will be added. The input array is expected to contain objects, arrays, or strings. If _schema_ is not specified or _schema.resultFields_ is not an array, `response.results` will be assigned the input array unchanged. When a _schema_ is specified, the following will occur: If the input array contains strings, they will be copied as-is into the `response.results` array. If the input array contains arrays, `response.results` will contain an array of objects with key:value pairs assuming the fields in _schema.resultFields_ are ordered in accordance with the data array values. If the input array contains objects, the identified _schema.resultFields_ will be used to extract a value from those objects for the output result. _schema.resultFields_ field identifiers are objects with the following properties: * `key` : <strong>(required)</strong> The locator name (String) * `parser`: A function or the name of a function on `Y.Parsers` used to convert the input value into a normalized type. Parser functions are passed the value as input and are expected to return a value. If no value parsing is needed, you can use strings as identifiers instead of objects (see example below). @example // Process array of arrays var schema = { resultFields: [ 'fruit', 'color' ] }, data = [ [ 'Banana', 'yellow' ], [ 'Orange', 'orange' ], [ 'Eggplant', 'purple' ] ]; var response = Y.DataSchema.Array.apply(schema, data); // response.results[0] is { fruit: "Banana", color: "yellow" } // Process array of objects data = [ { fruit: 'Banana', color: 'yellow', price: '1.96' }, { fruit: 'Orange', color: 'orange', price: '2.04' }, { fruit: 'Eggplant', color: 'purple', price: '4.31' } ]; response = Y.DataSchema.Array.apply(schema, data); // response.results[0] is { fruit: "Banana", color: "yellow" } // Use parsers schema.resultFields = [ { key: 'fruit', parser: function (val) { return val.toUpperCase(); } }, { key: 'price', parser: 'number' // Uses Y.Parsers.number } ]; response = Y.DataSchema.Array.apply(schema, data); // Note price was converted from a numeric string to a number // response.results[0] looks like { fruit: "BANANA", price: 1.96 } @method apply @param {Object} [schema] Schema to apply. Supported configuration properties are: @param {Array} [schema.resultFields] Field identifiers to locate/assign values in the response records. See above for details. @param {Array} data Array data. @return {Object} An Object with properties `results` and `meta` @static **/ apply: function(schema, data) { var data_in = data, data_out = {results:[],meta:{}}; if(LANG.isArray(data_in)) { if(schema && LANG.isArray(schema.resultFields)) { // Parse results data data_out = SchemaArray._parseResults.call(this, schema.resultFields, data_in, data_out); } else { data_out.results = data_in; } } else { data_out.error = new Error("Array schema parse failure"); } return data_out; }, /** * Schema-parsed list of results from full data * * @method _parseResults * @param fields {Array} Schema to parse against. * @param array_in {Array} Array to parse. * @param data_out {Object} In-progress parsed data to update. * @return {Object} Parsed data object. * @static * @protected */ _parseResults: function(fields, array_in, data_out) { var results = [], result, item, type, field, key, value, i, j; for(i=array_in.length-1; i>-1; i--) { result = {}; item = array_in[i]; type = (LANG.isObject(item) && !LANG.isFunction(item)) ? 2 : (LANG.isArray(item)) ? 1 : (LANG.isString(item)) ? 0 : -1; if(type > 0) { for(j=fields.length-1; j>-1; j--) { field = fields[j]; key = (!LANG.isUndefined(field.key)) ? field.key : field; value = (!LANG.isUndefined(item[key])) ? item[key] : item[j]; result[key] = Y.DataSchema.Base.parse.call(this, value, field); } } else if(type === 0) { result = item; } else { //TODO: null or {}? result = null; } results[i] = result; } data_out.results = results; return data_out; } }; Y.DataSchema.Array = Y.mix(SchemaArray, Y.DataSchema.Base); }, '3.18.1', {"requires": ["dataschema-base"]});
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