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alexandre_ |
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/*
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Copyright (c) 2004-2006, The Dojo Foundation
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All Rights Reserved.
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Licensed under the Academic Free License version 2.1 or above OR the
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modified BSD license. For more information on Dojo licensing, see:
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http://dojotoolkit.org/community/licensing.shtml
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*/
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dojo.provide("dojo.data.old.provider.FlatFile");
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dojo.require("dojo.data.old.provider.Base");
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dojo.require("dojo.data.old.Item");
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dojo.require("dojo.data.old.Attribute");
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dojo.require("dojo.data.old.ResultSet");
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dojo.require("dojo.data.old.format.Json");
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dojo.require("dojo.data.old.format.Csv");
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dojo.require("dojo.lang.assert");
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dojo.data.old.provider.FlatFile = function (keywordParameters) {
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dojo.lang.assertType(keywordParameters, "pureobject", {optional:true});
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dojo.data.old.provider.Base.call(this);
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this._arrayOfItems = [];
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this._resultSet = null;
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this._dictionaryOfAttributes = {};
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if (keywordParameters) {
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var jsonObjects = keywordParameters["jsonObjects"];
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var jsonString = keywordParameters["jsonString"];
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var fileUrl = keywordParameters["url"];
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if (jsonObjects) {
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dojo.data.old.format.Json.loadDataProviderFromArrayOfJsonData(this, jsonObjects);
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}
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if (jsonString) {
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dojo.data.old.format.Json.loadDataProviderFromFileContents(this, jsonString);
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}
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if (fileUrl) {
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var arrayOfParts = fileUrl.split(".");
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var lastPart = arrayOfParts[(arrayOfParts.length - 1)];
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var formatParser = null;
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if (lastPart == "json") {
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formatParser = dojo.data.old.format.Json;
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}
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if (lastPart == "csv") {
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formatParser = dojo.data.old.format.Csv;
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}
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if (formatParser) {
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var fileContents = dojo.hostenv.getText(fileUrl);
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formatParser.loadDataProviderFromFileContents(this, fileContents);
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} else {
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dojo.lang.assert(false, "new dojo.data.old.provider.FlatFile({url: }) was passed a file without a .csv or .json suffix");
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}
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}
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}
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};
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dojo.inherits(dojo.data.old.provider.FlatFile, dojo.data.old.provider.Base);
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dojo.data.old.provider.FlatFile.prototype.getProviderCapabilities = function (keyword) {
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dojo.lang.assertType(keyword, String, {optional:true});
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if (!this._ourCapabilities) {
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this._ourCapabilities = {transactions:false, undo:false, login:false, versioning:false, anonymousRead:true, anonymousWrite:false, permissions:false, queries:false, strongTyping:false, datatypes:[String, Date, Number]};
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}
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if (keyword) {
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return this._ourCapabilities[keyword];
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} else {
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return this._ourCapabilities;
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}
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};
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dojo.data.old.provider.FlatFile.prototype.registerAttribute = function (attributeId) {
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var registeredAttribute = this.getAttribute(attributeId);
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if (!registeredAttribute) {
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var newAttribute = new dojo.data.old.Attribute(this, attributeId);
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this._dictionaryOfAttributes[attributeId] = newAttribute;
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registeredAttribute = newAttribute;
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}
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return registeredAttribute;
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};
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dojo.data.old.provider.FlatFile.prototype.getAttribute = function (attributeId) {
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var attribute = (this._dictionaryOfAttributes[attributeId] || null);
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return attribute;
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};
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dojo.data.old.provider.FlatFile.prototype.getAttributes = function () {
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var arrayOfAttributes = [];
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for (var key in this._dictionaryOfAttributes) {
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var attribute = this._dictionaryOfAttributes[key];
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arrayOfAttributes.push(attribute);
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}
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return arrayOfAttributes;
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};
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dojo.data.old.provider.FlatFile.prototype.fetchArray = function (query) {
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return this._arrayOfItems;
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};
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dojo.data.old.provider.FlatFile.prototype.fetchResultSet = function (query) {
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if (!this._resultSet) {
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this._resultSet = new dojo.data.old.ResultSet(this, this.fetchArray(query));
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}
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return this._resultSet;
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};
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dojo.data.old.provider.FlatFile.prototype._newItem = function () {
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var item = new dojo.data.old.Item(this);
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this._arrayOfItems.push(item);
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return item;
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};
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dojo.data.old.provider.FlatFile.prototype._newAttribute = function (attributeId) {
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dojo.lang.assertType(attributeId, String);
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dojo.lang.assert(this.getAttribute(attributeId) === null);
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var attribute = new dojo.data.old.Attribute(this, attributeId);
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this._dictionaryOfAttributes[attributeId] = attribute;
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return attribute;
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};
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dojo.data.old.provider.Base.prototype._getResultSets = function () {
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return [this._resultSet];
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};
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