dojo.provide("dojo.data.old.provider.FlatFile");
dojo.require("dojo.data.old.provider.Base");
dojo.require("dojo.data.old.Item");
dojo.require("dojo.data.old.Attribute");
dojo.require("dojo.data.old.ResultSet");
dojo.require("dojo.data.old.format.Json");
dojo.require("dojo.data.old.format.Csv");
dojo.require("dojo.lang.assert");
// -------------------------------------------------------------------
// Constructor
// -------------------------------------------------------------------
dojo.data.old.provider.FlatFile = function(/* keywords */ keywordParameters) {
/**
* summary:
* A Json Data Provider knows how to read in simple JSON data
* tables and make their contents accessable as Items.
*/
dojo.lang.assertType(keywordParameters, "pureobject", {optional: true});
dojo.data.old.provider.Base.call(this);
this._arrayOfItems = [];
this._resultSet = null;
this._dictionaryOfAttributes = {};
if (keywordParameters) {
var jsonObjects = keywordParameters["jsonObjects"];
var jsonString = keywordParameters["jsonString"];
var fileUrl = keywordParameters["url"];
if (jsonObjects) {
dojo.data.old.format.Json.loadDataProviderFromArrayOfJsonData(this, jsonObjects);
}
if (jsonString) {
dojo.data.old.format.Json.loadDataProviderFromFileContents(this, jsonString);
}
if (fileUrl) {
var arrayOfParts = fileUrl.split('.');
var lastPart = arrayOfParts[(arrayOfParts.length - 1)];
var formatParser = null;
if (lastPart == "json") {
formatParser = dojo.data.old.format.Json;
}
if (lastPart == "csv") {
formatParser = dojo.data.old.format.Csv;
}
if (formatParser) {
var fileContents = dojo.hostenv.getText(fileUrl);
formatParser.loadDataProviderFromFileContents(this, fileContents);
} else {
dojo.lang.assert(false, "new dojo.data.old.provider.FlatFile({url: }) was passed a file without a .csv or .json suffix");
}
}
}
};
dojo.inherits(dojo.data.old.provider.FlatFile, dojo.data.old.provider.Base);
// -------------------------------------------------------------------
// Public instance methods
// -------------------------------------------------------------------
dojo.data.old.provider.FlatFile.prototype.getProviderCapabilities = function(/* string */ keyword) {
dojo.lang.assertType(keyword, String, {optional: true});
if (!this._ourCapabilities) {
this._ourCapabilities = {
transactions: false,
undo: false,
login: false,
versioning: false,
anonymousRead: true,
anonymousWrite: false,
permissions: false,
queries: false,
strongTyping: false,
datatypes: [String, Date, Number]
};
}
if (keyword) {
return this._ourCapabilities[keyword];
} else {
return this._ourCapabilities;
}
};
dojo.data.old.provider.FlatFile.prototype.registerAttribute = function(/* string or dojo.data.old.Attribute */ attributeId) {
var registeredAttribute = this.getAttribute(attributeId);
if (!registeredAttribute) {
var newAttribute = new dojo.data.old.Attribute(this, attributeId);
this._dictionaryOfAttributes[attributeId] = newAttribute;
registeredAttribute = newAttribute;
}
return registeredAttribute; // dojo.data.old.Attribute
};
dojo.data.old.provider.FlatFile.prototype.getAttribute = function(/* string or dojo.data.old.Attribute */ attributeId) {
var attribute = (this._dictionaryOfAttributes[attributeId] || null);
return attribute; // dojo.data.old.Attribute or null
};
dojo.data.old.provider.FlatFile.prototype.getAttributes = function() {
var arrayOfAttributes = [];
for (var key in this._dictionaryOfAttributes) {
var attribute = this._dictionaryOfAttributes[key];
arrayOfAttributes.push(attribute);
}
return arrayOfAttributes; // Array
};
dojo.data.old.provider.FlatFile.prototype.fetchArray = function(query) {
/**
* summary: Returns an Array containing all of the Items.
*/
return this._arrayOfItems; // Array
};
dojo.data.old.provider.FlatFile.prototype.fetchResultSet = function(query) {
/**
* summary: Returns a ResultSet containing all of the Items.
*/
if (!this._resultSet) {
this._resultSet = new dojo.data.old.ResultSet(this, this.fetchArray(query));
}
return this._resultSet; // dojo.data.old.ResultSet
};
// -------------------------------------------------------------------
// Private instance methods
// -------------------------------------------------------------------
dojo.data.old.provider.FlatFile.prototype._newItem = function() {
var item = new dojo.data.old.Item(this);
this._arrayOfItems.push(item);
return item; // dojo.data.old.Item
};
dojo.data.old.provider.FlatFile.prototype._newAttribute = function(/* String */ attributeId) {
dojo.lang.assertType(attributeId, String);
dojo.lang.assert(this.getAttribute(attributeId) === null);
var attribute = new dojo.data.old.Attribute(this, attributeId);
this._dictionaryOfAttributes[attributeId] = attribute;
return attribute; // dojo.data.old.Attribute
};
dojo.data.old.provider.Base.prototype._getResultSets = function() {
return [this._resultSet]; // Array
};