--- /dev/null
+if(!dojo._hasResource["dojo.data.ItemFileReadStore"]){ //_hasResource checks added by build. Do not use _hasResource directly in your code.
+dojo._hasResource["dojo.data.ItemFileReadStore"] = true;
+dojo.provide("dojo.data.ItemFileReadStore");
+
+dojo.require("dojo.data.util.filter");
+dojo.require("dojo.data.util.simpleFetch");
+dojo.require("dojo.date.stamp");
+
+dojo.declare("dojo.data.ItemFileReadStore", null,{
+ // summary:
+ // The ItemFileReadStore implements the dojo.data.api.Read API and reads
+ // data from JSON files that have contents in this format --
+ // { items: [
+ // { name:'Kermit', color:'green', age:12, friends:['Gonzo', {_reference:{name:'Fozzie Bear'}}]},
+ // { name:'Fozzie Bear', wears:['hat', 'tie']},
+ // { name:'Miss Piggy', pets:'Foo-Foo'}
+ // ]}
+ // Note that it can also contain an 'identifer' property that specified which attribute on the items
+ // in the array of items that acts as the unique identifier for that item.
+ //
+ constructor: function(/* Object */ keywordParameters){
+ // summary: constructor
+ // keywordParameters: {url: String}
+ // keywordParameters: {data: jsonObject}
+ // keywordParameters: {typeMap: object)
+ // The structure of the typeMap object is as follows:
+ // {
+ // type0: function || object,
+ // type1: function || object,
+ // ...
+ // typeN: function || object
+ // }
+ // Where if it is a function, it is assumed to be an object constructor that takes the
+ // value of _value as the initialization parameters. If it is an object, then it is assumed
+ // to be an object of general form:
+ // {
+ // type: function, //constructor.
+ // deserialize: function(value) //The function that parses the value and constructs the object defined by type appropriately.
+ // }
+
+ this._arrayOfAllItems = [];
+ this._arrayOfTopLevelItems = [];
+ this._loadFinished = false;
+ this._jsonFileUrl = keywordParameters.url;
+ this._jsonData = keywordParameters.data;
+ this._datatypeMap = keywordParameters.typeMap || {};
+ if(!this._datatypeMap['Date']){
+ //If no default mapping for dates, then set this as default.
+ //We use the dojo.date.stamp here because the ISO format is the 'dojo way'
+ //of generically representing dates.
+ this._datatypeMap['Date'] = {
+ type: Date,
+ deserialize: function(value){
+ return dojo.date.stamp.fromISOString(value);
+ }
+ };
+ }
+ this._features = {'dojo.data.api.Read':true, 'dojo.data.api.Identity':true};
+ this._itemsByIdentity = null;
+ this._storeRefPropName = "_S"; // Default name for the store reference to attach to every item.
+ this._itemNumPropName = "_0"; // Default Item Id for isItem to attach to every item.
+ this._rootItemPropName = "_RI"; // Default Item Id for isItem to attach to every item.
+ this._reverseRefMap = "_RRM"; // Default attribute for constructing a reverse reference map for use with reference integrity
+ this._loadInProgress = false; //Got to track the initial load to prevent duelling loads of the dataset.
+ this._queuedFetches = [];
+ },
+
+ url: "", // use "" rather than undefined for the benefit of the parser (#3539)
+
+ _assertIsItem: function(/* item */ item){
+ // summary:
+ // This function tests whether the item passed in is indeed an item in the store.
+ // item:
+ // The item to test for being contained by the store.
+ if(!this.isItem(item)){
+ throw new Error("dojo.data.ItemFileReadStore: Invalid item argument.");
+ }
+ },
+
+ _assertIsAttribute: function(/* attribute-name-string */ attribute){
+ // summary:
+ // This function tests whether the item passed in is indeed a valid 'attribute' like type for the store.
+ // attribute:
+ // The attribute to test for being contained by the store.
+ if(typeof attribute !== "string"){
+ throw new Error("dojo.data.ItemFileReadStore: Invalid attribute argument.");
+ }
+ },
+
+ getValue: function( /* item */ item,
+ /* attribute-name-string */ attribute,
+ /* value? */ defaultValue){
+ // summary:
+ // See dojo.data.api.Read.getValue()
+ var values = this.getValues(item, attribute);
+ return (values.length > 0)?values[0]:defaultValue; // mixed
+ },
+
+ getValues: function(/* item */ item,
+ /* attribute-name-string */ attribute){
+ // summary:
+ // See dojo.data.api.Read.getValues()
+
+ this._assertIsItem(item);
+ this._assertIsAttribute(attribute);
+ return item[attribute] || []; // Array
+ },
+
+ getAttributes: function(/* item */ item){
+ // summary:
+ // See dojo.data.api.Read.getAttributes()
+ this._assertIsItem(item);
+ var attributes = [];
+ for(var key in item){
+ // Save off only the real item attributes, not the special id marks for O(1) isItem.
+ if((key !== this._storeRefPropName) && (key !== this._itemNumPropName) && (key !== this._rootItemPropName) && (key !== this._reverseRefMap)){
+ attributes.push(key);
+ }
+ }
+ return attributes; // Array
+ },
+
+ hasAttribute: function( /* item */ item,
+ /* attribute-name-string */ attribute) {
+ // summary:
+ // See dojo.data.api.Read.hasAttribute()
+ return this.getValues(item, attribute).length > 0;
+ },
+
+ containsValue: function(/* item */ item,
+ /* attribute-name-string */ attribute,
+ /* anything */ value){
+ // summary:
+ // See dojo.data.api.Read.containsValue()
+ var regexp = undefined;
+ if(typeof value === "string"){
+ regexp = dojo.data.util.filter.patternToRegExp(value, false);
+ }
+ return this._containsValue(item, attribute, value, regexp); //boolean.
+ },
+
+ _containsValue: function( /* item */ item,
+ /* attribute-name-string */ attribute,
+ /* anything */ value,
+ /* RegExp?*/ regexp){
+ // summary:
+ // Internal function for looking at the values contained by the item.
+ // description:
+ // Internal function for looking at the values contained by the item. This
+ // function allows for denoting if the comparison should be case sensitive for
+ // strings or not (for handling filtering cases where string case should not matter)
+ //
+ // item:
+ // The data item to examine for attribute values.
+ // attribute:
+ // The attribute to inspect.
+ // value:
+ // The value to match.
+ // regexp:
+ // Optional regular expression generated off value if value was of string type to handle wildcarding.
+ // If present and attribute values are string, then it can be used for comparison instead of 'value'
+ return dojo.some(this.getValues(item, attribute), function(possibleValue){
+ if(possibleValue !== null && !dojo.isObject(possibleValue) && regexp){
+ if(possibleValue.toString().match(regexp)){
+ return true; // Boolean
+ }
+ }else if(value === possibleValue){
+ return true; // Boolean
+ }
+ });
+ },
+
+ isItem: function(/* anything */ something){
+ // summary:
+ // See dojo.data.api.Read.isItem()
+ if(something && something[this._storeRefPropName] === this){
+ if(this._arrayOfAllItems[something[this._itemNumPropName]] === something){
+ return true;
+ }
+ }
+ return false; // Boolean
+ },
+
+ isItemLoaded: function(/* anything */ something){
+ // summary:
+ // See dojo.data.api.Read.isItemLoaded()
+ return this.isItem(something); //boolean
+ },
+
+ loadItem: function(/* object */ keywordArgs){
+ // summary:
+ // See dojo.data.api.Read.loadItem()
+ this._assertIsItem(keywordArgs.item);
+ },
+
+ getFeatures: function(){
+ // summary:
+ // See dojo.data.api.Read.getFeatures()
+ return this._features; //Object
+ },
+
+ getLabel: function(/* item */ item){
+ // summary:
+ // See dojo.data.api.Read.getLabel()
+ if(this._labelAttr && this.isItem(item)){
+ return this.getValue(item,this._labelAttr); //String
+ }
+ return undefined; //undefined
+ },
+
+ getLabelAttributes: function(/* item */ item){
+ // summary:
+ // See dojo.data.api.Read.getLabelAttributes()
+ if(this._labelAttr){
+ return [this._labelAttr]; //array
+ }
+ return null; //null
+ },
+
+ _fetchItems: function( /* Object */ keywordArgs,
+ /* Function */ findCallback,
+ /* Function */ errorCallback){
+ // summary:
+ // See dojo.data.util.simpleFetch.fetch()
+ var self = this;
+ var filter = function(requestArgs, arrayOfItems){
+ var items = [];
+ if(requestArgs.query){
+ var ignoreCase = requestArgs.queryOptions ? requestArgs.queryOptions.ignoreCase : false;
+
+ //See if there are any string values that can be regexp parsed first to avoid multiple regexp gens on the
+ //same value for each item examined. Much more efficient.
+ var regexpList = {};
+ for(var key in requestArgs.query){
+ var value = requestArgs.query[key];
+ if(typeof value === "string"){
+ regexpList[key] = dojo.data.util.filter.patternToRegExp(value, ignoreCase);
+ }
+ }
+
+ for(var i = 0; i < arrayOfItems.length; ++i){
+ var match = true;
+ var candidateItem = arrayOfItems[i];
+ if(candidateItem === null){
+ match = false;
+ }else{
+ for(var key in requestArgs.query) {
+ var value = requestArgs.query[key];
+ if (!self._containsValue(candidateItem, key, value, regexpList[key])){
+ match = false;
+ }
+ }
+ }
+ if(match){
+ items.push(candidateItem);
+ }
+ }
+ findCallback(items, requestArgs);
+ }else{
+ // We want a copy to pass back in case the parent wishes to sort the array.
+ // We shouldn't allow resort of the internal list, so that multiple callers
+ // can get lists and sort without affecting each other. We also need to
+ // filter out any null values that have been left as a result of deleteItem()
+ // calls in ItemFileWriteStore.
+ for(var i = 0; i < arrayOfItems.length; ++i){
+ var item = arrayOfItems[i];
+ if(item !== null){
+ items.push(item);
+ }
+ }
+ findCallback(items, requestArgs);
+ }
+ };
+
+ if(this._loadFinished){
+ filter(keywordArgs, this._getItemsArray(keywordArgs.queryOptions));
+ }else{
+
+ if(this._jsonFileUrl){
+ //If fetches come in before the loading has finished, but while
+ //a load is in progress, we have to defer the fetching to be
+ //invoked in the callback.
+ if(this._loadInProgress){
+ this._queuedFetches.push({args: keywordArgs, filter: filter});
+ }else{
+ this._loadInProgress = true;
+ var getArgs = {
+ url: self._jsonFileUrl,
+ handleAs: "json-comment-optional"
+ };
+ var getHandler = dojo.xhrGet(getArgs);
+ getHandler.addCallback(function(data){
+ try{
+ self._getItemsFromLoadedData(data);
+ self._loadFinished = true;
+ self._loadInProgress = false;
+
+ filter(keywordArgs, self._getItemsArray(keywordArgs.queryOptions));
+ self._handleQueuedFetches();
+ }catch(e){
+ self._loadFinished = true;
+ self._loadInProgress = false;
+ errorCallback(e, keywordArgs);
+ }
+ });
+ getHandler.addErrback(function(error){
+ self._loadInProgress = false;
+ errorCallback(error, keywordArgs);
+ });
+ }
+ }else if(this._jsonData){
+ try{
+ this._loadFinished = true;
+ this._getItemsFromLoadedData(this._jsonData);
+ this._jsonData = null;
+ filter(keywordArgs, this._getItemsArray(keywordArgs.queryOptions));
+ }catch(e){
+ errorCallback(e, keywordArgs);
+ }
+ }else{
+ errorCallback(new Error("dojo.data.ItemFileReadStore: No JSON source data was provided as either URL or a nested Javascript object."), keywordArgs);
+ }
+ }
+ },
+
+ _handleQueuedFetches: function(){
+ // summary:
+ // Internal function to execute delayed request in the store.
+ //Execute any deferred fetches now.
+ if (this._queuedFetches.length > 0) {
+ for(var i = 0; i < this._queuedFetches.length; i++){
+ var fData = this._queuedFetches[i];
+ var delayedQuery = fData.args;
+ var delayedFilter = fData.filter;
+ if(delayedFilter){
+ delayedFilter(delayedQuery, this._getItemsArray(delayedQuery.queryOptions));
+ }else{
+ this.fetchItemByIdentity(delayedQuery);
+ }
+ }
+ this._queuedFetches = [];
+ }
+ },
+
+ _getItemsArray: function(/*object?*/queryOptions){
+ // summary:
+ // Internal function to determine which list of items to search over.
+ // queryOptions: The query options parameter, if any.
+ if(queryOptions && queryOptions.deep) {
+ return this._arrayOfAllItems;
+ }
+ return this._arrayOfTopLevelItems;
+ },
+
+ close: function(/*dojo.data.api.Request || keywordArgs || null */ request){
+ // summary:
+ // See dojo.data.api.Read.close()
+ },
+
+ _getItemsFromLoadedData: function(/* Object */ dataObject){
+ // summary:
+ // Function to parse the loaded data into item format and build the internal items array.
+ // description:
+ // Function to parse the loaded data into item format and build the internal items array.
+ //
+ // dataObject:
+ // The JS data object containing the raw data to convery into item format.
+ //
+ // returns: array
+ // Array of items in store item format.
+
+ // First, we define a couple little utility functions...
+
+ function valueIsAnItem(/* anything */ aValue){
+ // summary:
+ // Given any sort of value that could be in the raw json data,
+ // return true if we should interpret the value as being an
+ // item itself, rather than a literal value or a reference.
+ // example:
+ // | false == valueIsAnItem("Kermit");
+ // | false == valueIsAnItem(42);
+ // | false == valueIsAnItem(new Date());
+ // | false == valueIsAnItem({_type:'Date', _value:'May 14, 1802'});
+ // | false == valueIsAnItem({_reference:'Kermit'});
+ // | true == valueIsAnItem({name:'Kermit', color:'green'});
+ // | true == valueIsAnItem({iggy:'pop'});
+ // | true == valueIsAnItem({foo:42});
+ var isItem = (
+ (aValue != null) &&
+ (typeof aValue == "object") &&
+ (!dojo.isArray(aValue)) &&
+ (!dojo.isFunction(aValue)) &&
+ (aValue.constructor == Object) &&
+ (typeof aValue._reference == "undefined") &&
+ (typeof aValue._type == "undefined") &&
+ (typeof aValue._value == "undefined")
+ );
+ return isItem;
+ }
+
+ var self = this;
+ function addItemAndSubItemsToArrayOfAllItems(/* Item */ anItem){
+ self._arrayOfAllItems.push(anItem);
+ for(var attribute in anItem){
+ var valueForAttribute = anItem[attribute];
+ if(valueForAttribute){
+ if(dojo.isArray(valueForAttribute)){
+ var valueArray = valueForAttribute;
+ for(var k = 0; k < valueArray.length; ++k){
+ var singleValue = valueArray[k];
+ if(valueIsAnItem(singleValue)){
+ addItemAndSubItemsToArrayOfAllItems(singleValue);
+ }
+ }
+ }else{
+ if(valueIsAnItem(valueForAttribute)){
+ addItemAndSubItemsToArrayOfAllItems(valueForAttribute);
+ }
+ }
+ }
+ }
+ }
+
+ this._labelAttr = dataObject.label;
+
+ // We need to do some transformations to convert the data structure
+ // that we read from the file into a format that will be convenient
+ // to work with in memory.
+
+ // Step 1: Walk through the object hierarchy and build a list of all items
+ var i;
+ var item;
+ this._arrayOfAllItems = [];
+ this._arrayOfTopLevelItems = dataObject.items;
+
+ for(i = 0; i < this._arrayOfTopLevelItems.length; ++i){
+ item = this._arrayOfTopLevelItems[i];
+ addItemAndSubItemsToArrayOfAllItems(item);
+ item[this._rootItemPropName]=true;
+ }
+
+ // Step 2: Walk through all the attribute values of all the items,
+ // and replace single values with arrays. For example, we change this:
+ // { name:'Miss Piggy', pets:'Foo-Foo'}
+ // into this:
+ // { name:['Miss Piggy'], pets:['Foo-Foo']}
+ //
+ // We also store the attribute names so we can validate our store
+ // reference and item id special properties for the O(1) isItem
+ var allAttributeNames = {};
+ var key;
+
+ for(i = 0; i < this._arrayOfAllItems.length; ++i){
+ item = this._arrayOfAllItems[i];
+ for(key in item){
+ if (key !== this._rootItemPropName)
+ {
+ var value = item[key];
+ if(value !== null){
+ if(!dojo.isArray(value)){
+ item[key] = [value];
+ }
+ }else{
+ item[key] = [null];
+ }
+ }
+ allAttributeNames[key]=key;
+ }
+ }
+
+ // Step 3: Build unique property names to use for the _storeRefPropName and _itemNumPropName
+ // This should go really fast, it will generally never even run the loop.
+ while(allAttributeNames[this._storeRefPropName]){
+ this._storeRefPropName += "_";
+ }
+ while(allAttributeNames[this._itemNumPropName]){
+ this._itemNumPropName += "_";
+ }
+ while(allAttributeNames[this._reverseRefMap]){
+ this._reverseRefMap += "_";
+ }
+
+ // Step 4: Some data files specify an optional 'identifier', which is
+ // the name of an attribute that holds the identity of each item.
+ // If this data file specified an identifier attribute, then build a
+ // hash table of items keyed by the identity of the items.
+ var arrayOfValues;
+
+ var identifier = dataObject.identifier;
+ if(identifier){
+ this._itemsByIdentity = {};
+ this._features['dojo.data.api.Identity'] = identifier;
+ for(i = 0; i < this._arrayOfAllItems.length; ++i){
+ item = this._arrayOfAllItems[i];
+ arrayOfValues = item[identifier];
+ var identity = arrayOfValues[0];
+ if(!this._itemsByIdentity[identity]){
+ this._itemsByIdentity[identity] = item;
+ }else{
+ if(this._jsonFileUrl){
+ throw new Error("dojo.data.ItemFileReadStore: The json data as specified by: [" + this._jsonFileUrl + "] is malformed. Items within the list have identifier: [" + identifier + "]. Value collided: [" + identity + "]");
+ }else if(this._jsonData){
+ throw new Error("dojo.data.ItemFileReadStore: The json data provided by the creation arguments is malformed. Items within the list have identifier: [" + identifier + "]. Value collided: [" + identity + "]");
+ }
+ }
+ }
+ }else{
+ this._features['dojo.data.api.Identity'] = Number;
+ }
+
+ // Step 5: Walk through all the items, and set each item's properties
+ // for _storeRefPropName and _itemNumPropName, so that store.isItem() will return true.
+ for(i = 0; i < this._arrayOfAllItems.length; ++i){
+ item = this._arrayOfAllItems[i];
+ item[this._storeRefPropName] = this;
+ item[this._itemNumPropName] = i;
+ }
+
+ // Step 6: We walk through all the attribute values of all the items,
+ // looking for type/value literals and item-references.
+ //
+ // We replace item-references with pointers to items. For example, we change:
+ // { name:['Kermit'], friends:[{_reference:{name:'Miss Piggy'}}] }
+ // into this:
+ // { name:['Kermit'], friends:[miss_piggy] }
+ // (where miss_piggy is the object representing the 'Miss Piggy' item).
+ //
+ // We replace type/value pairs with typed-literals. For example, we change:
+ // { name:['Nelson Mandela'], born:[{_type:'Date', _value:'July 18, 1918'}] }
+ // into this:
+ // { name:['Kermit'], born:(new Date('July 18, 1918')) }
+ //
+ // We also generate the associate map for all items for the O(1) isItem function.
+ for(i = 0; i < this._arrayOfAllItems.length; ++i){
+ item = this._arrayOfAllItems[i]; // example: { name:['Kermit'], friends:[{_reference:{name:'Miss Piggy'}}] }
+ for(key in item){
+ arrayOfValues = item[key]; // example: [{_reference:{name:'Miss Piggy'}}]
+ for(var j = 0; j < arrayOfValues.length; ++j) {
+ value = arrayOfValues[j]; // example: {_reference:{name:'Miss Piggy'}}
+ if(value !== null && typeof value == "object"){
+ if(value._type && value._value){
+ var type = value._type; // examples: 'Date', 'Color', or 'ComplexNumber'
+ var mappingObj = this._datatypeMap[type]; // examples: Date, dojo.Color, foo.math.ComplexNumber, {type: dojo.Color, deserialize(value){ return new dojo.Color(value)}}
+ if(!mappingObj){
+ throw new Error("dojo.data.ItemFileReadStore: in the typeMap constructor arg, no object class was specified for the datatype '" + type + "'");
+ }else if(dojo.isFunction(mappingObj)){
+ arrayOfValues[j] = new mappingObj(value._value);
+ }else if(dojo.isFunction(mappingObj.deserialize)){
+ arrayOfValues[j] = mappingObj.deserialize(value._value);
+ }else{
+ throw new Error("dojo.data.ItemFileReadStore: Value provided in typeMap was neither a constructor, nor a an object with a deserialize function");
+ }
+ }
+ if(value._reference){
+ var referenceDescription = value._reference; // example: {name:'Miss Piggy'}
+ if(!dojo.isObject(referenceDescription)){
+ // example: 'Miss Piggy'
+ // from an item like: { name:['Kermit'], friends:[{_reference:'Miss Piggy'}]}
+ arrayOfValues[j] = this._itemsByIdentity[referenceDescription];
+ }else{
+ // example: {name:'Miss Piggy'}
+ // from an item like: { name:['Kermit'], friends:[{_reference:{name:'Miss Piggy'}}] }
+ for(var k = 0; k < this._arrayOfAllItems.length; ++k){
+ var candidateItem = this._arrayOfAllItems[k];
+ var found = true;
+ for(var refKey in referenceDescription){
+ if(candidateItem[refKey] != referenceDescription[refKey]){
+ found = false;
+ }
+ }
+ if(found){
+ arrayOfValues[j] = candidateItem;
+ }
+ }
+ }
+ if(this.referenceIntegrity){
+ var refItem = arrayOfValues[j];
+ if(this.isItem(refItem)){
+ this._addReferenceToMap(refItem, item, key);
+ }
+ }
+ }else if(this.isItem(value)){
+ //It's a child item (not one referenced through _reference).
+ //We need to treat this as a referenced item, so it can be cleaned up
+ //in a write store easily.
+ if(this.referenceIntegrity){
+ this._addReferenceToMap(value, item, key);
+ }
+ }
+ }
+ }
+ }
+ }
+ },
+
+ _addReferenceToMap: function(/*item*/ refItem, /*item*/ parentItem, /*string*/ attribute){
+ // summary:
+ // Method to add an reference map entry for an item and attribute.
+ // description:
+ // Method to add an reference map entry for an item and attribute. //
+ // refItem:
+ // The item that is referenced.
+ // parentItem:
+ // The item that holds the new reference to refItem.
+ // attribute:
+ // The attribute on parentItem that contains the new reference.
+
+ //Stub function, does nothing. Real processing is in ItemFileWriteStore.
+ },
+
+ getIdentity: function(/* item */ item){
+ // summary:
+ // See dojo.data.api.Identity.getIdentity()
+ var identifier = this._features['dojo.data.api.Identity'];
+ if(identifier === Number){
+ return item[this._itemNumPropName]; // Number
+ }else{
+ var arrayOfValues = item[identifier];
+ if(arrayOfValues){
+ return arrayOfValues[0]; // Object || String
+ }
+ }
+ return null; // null
+ },
+
+ fetchItemByIdentity: function(/* Object */ keywordArgs){
+ // summary:
+ // See dojo.data.api.Identity.fetchItemByIdentity()
+
+ // Hasn't loaded yet, we have to trigger the load.
+ if(!this._loadFinished){
+ var self = this;
+ if(this._jsonFileUrl){
+
+ if(this._loadInProgress){
+ this._queuedFetches.push({args: keywordArgs});
+ }else{
+ this._loadInProgress = true;
+ var getArgs = {
+ url: self._jsonFileUrl,
+ handleAs: "json-comment-optional"
+ };
+ var getHandler = dojo.xhrGet(getArgs);
+ getHandler.addCallback(function(data){
+ var scope = keywordArgs.scope?keywordArgs.scope:dojo.global;
+ try{
+ self._getItemsFromLoadedData(data);
+ self._loadFinished = true;
+ self._loadInProgress = false;
+ var item = self._getItemByIdentity(keywordArgs.identity);
+ if(keywordArgs.onItem){
+ keywordArgs.onItem.call(scope, item);
+ }
+ self._handleQueuedFetches();
+ }catch(error){
+ self._loadInProgress = false;
+ if(keywordArgs.onError){
+ keywordArgs.onError.call(scope, error);
+ }
+ }
+ });
+ getHandler.addErrback(function(error){
+ self._loadInProgress = false;
+ if(keywordArgs.onError){
+ var scope = keywordArgs.scope?keywordArgs.scope:dojo.global;
+ keywordArgs.onError.call(scope, error);
+ }
+ });
+ }
+
+ }else if(this._jsonData){
+ // Passed in data, no need to xhr.
+ self._getItemsFromLoadedData(self._jsonData);
+ self._jsonData = null;
+ self._loadFinished = true;
+ var item = self._getItemByIdentity(keywordArgs.identity);
+ if(keywordArgs.onItem){
+ var scope = keywordArgs.scope?keywordArgs.scope:dojo.global;
+ keywordArgs.onItem.call(scope, item);
+ }
+ }
+ }else{
+ // Already loaded. We can just look it up and call back.
+ var item = this._getItemByIdentity(keywordArgs.identity);
+ if(keywordArgs.onItem){
+ var scope = keywordArgs.scope?keywordArgs.scope:dojo.global;
+ keywordArgs.onItem.call(scope, item);
+ }
+ }
+ },
+
+ _getItemByIdentity: function(/* Object */ identity){
+ // summary:
+ // Internal function to look an item up by its identity map.
+ var item = null;
+ if(this._itemsByIdentity){
+ item = this._itemsByIdentity[identity];
+ }else{
+ item = this._arrayOfAllItems[identity];
+ }
+ if(item === undefined){
+ item = null;
+ }
+ return item; // Object
+ },
+
+ getIdentityAttributes: function(/* item */ item){
+ // summary:
+ // See dojo.data.api.Identity.getIdentifierAttributes()
+
+ var identifier = this._features['dojo.data.api.Identity'];
+ if(identifier === Number){
+ // If (identifier === Number) it means getIdentity() just returns
+ // an integer item-number for each item. The dojo.data.api.Identity
+ // spec says we need to return null if the identity is not composed
+ // of attributes
+ return null; // null
+ }else{
+ return [identifier]; // Array
+ }
+ },
+
+ _forceLoad: function(){
+ // summary:
+ // Internal function to force a load of the store if it hasn't occurred yet. This is required
+ // for specific functions to work properly.
+ var self = this;
+ if(this._jsonFileUrl){
+ var getArgs = {
+ url: self._jsonFileUrl,
+ handleAs: "json-comment-optional",
+ sync: true
+ };
+ var getHandler = dojo.xhrGet(getArgs);
+ getHandler.addCallback(function(data){
+ try{
+ //Check to be sure there wasn't another load going on concurrently
+ //So we don't clobber data that comes in on it. If there is a load going on
+ //then do not save this data. It will potentially clobber current data.
+ //We mainly wanted to sync/wait here.
+ //TODO: Revisit the loading scheme of this store to improve multi-initial
+ //request handling.
+ if (self._loadInProgress !== true && !self._loadFinished) {
+ self._getItemsFromLoadedData(data);
+ self._loadFinished = true;
+ }
+ }catch(e){
+ console.log(e);
+ throw e;
+ }
+ });
+ getHandler.addErrback(function(error){
+ throw error;
+ });
+ }else if(this._jsonData){
+ self._getItemsFromLoadedData(self._jsonData);
+ self._jsonData = null;
+ self._loadFinished = true;
+ }
+ }
+});
+//Mix in the simple fetch implementation to this class.
+dojo.extend(dojo.data.ItemFileReadStore,dojo.data.util.simpleFetch);
+
+}
projects / eow / blobdiff