116 lines
2.9 KiB
JavaScript
116 lines
2.9 KiB
JavaScript
/*
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Copyright (c) 2009, Yahoo! Inc. All rights reserved.
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Code licensed under the BSD License:
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http://developer.yahoo.net/yui/license.txt
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version: 3.0.0
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build: 1549
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*/
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YUI.add('datasource-function', function(Y) {
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/**
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* Provides a DataSource implementation which can be used to retrieve data from a custom function.
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*
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* @module datasource
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* @submodule datasource-function
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*/
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/**
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* Function subclass for the DataSource Utility.
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* @class DataSource.Function
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* @extends DataSource.Local
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* @constructor
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*/
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var LANG = Y.Lang,
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DSFn = function() {
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DSFn.superclass.constructor.apply(this, arguments);
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};
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/////////////////////////////////////////////////////////////////////////////
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//
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// DataSource.Function static properties
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//
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/////////////////////////////////////////////////////////////////////////////
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Y.mix(DSFn, {
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/**
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* Class name.
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*
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* @property NAME
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* @type String
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* @static
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* @final
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* @value "dataSourceFunction"
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*/
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NAME: "dataSourceFunction",
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/////////////////////////////////////////////////////////////////////////////
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//
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// DataSource.Function Attributes
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//
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/////////////////////////////////////////////////////////////////////////////
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ATTRS: {
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/**
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* @attribute source
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* @description Pointer to live data.
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* @type MIXED
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* @default null
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*/
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source: {
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validator: LANG.isFunction
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}
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}
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});
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Y.extend(DSFn, Y.DataSource.Local, {
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/**
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* Passes query string to IO. Fires <code>response</code> event when
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* response is received asynchronously.
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*
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* @method _defRequestFn
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* @param e {Event.Facade} Event Facade with the following properties:
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* <dl>
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* <dt>tId (Number)</dt> <dd>Unique transaction ID.</dd>
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* <dt>request (Object)</dt> <dd>The request.</dd>
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* <dt>callback (Object)</dt> <dd>The callback object with the following properties:
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* <dl>
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* <dt>success (Function)</dt> <dd>Success handler.</dd>
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* <dt>failure (Function)</dt> <dd>Failure handler.</dd>
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* </dl>
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* </dd>
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* <dt>cfg (Object)</dt> <dd>Configuration object.</dd>
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* </dl>
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* @protected
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*/
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_defRequestFn: function(e) {
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var fn = this.get("source"),
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response;
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if(fn) {
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try {
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response = fn(e.request, this, e);
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this.fire("data", Y.mix({data:response}, e));
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}
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catch(error) {
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e.error = error;
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this.fire("error", e);
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}
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}
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else {
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e.error = new Error("Function data failure");
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this.fire("error", e);
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}
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return e.tId;
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}
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});
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Y.DataSource.Function = DSFn;
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}, '3.0.0' ,{requires:['datasource-local']});
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