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Diffstat (limited to '')
| -rw-r--r-- | js/dojo-1.6/dojox/data/AndOrReadStore.js | 1053 |
1 files changed, 1053 insertions, 0 deletions
diff --git a/js/dojo-1.6/dojox/data/AndOrReadStore.js b/js/dojo-1.6/dojox/data/AndOrReadStore.js new file mode 100644 index 0000000..af2f4e3 --- /dev/null +++ b/js/dojo-1.6/dojox/data/AndOrReadStore.js @@ -0,0 +1,1053 @@ +/*
+ Copyright (c) 2004-2011, The Dojo Foundation All Rights Reserved.
+ Available via Academic Free License >= 2.1 OR the modified BSD license.
+ see: http://dojotoolkit.org/license for details
+*/
+
+
+if(!dojo._hasResource["dojox.data.AndOrReadStore"]){ //_hasResource checks added by build. Do not use _hasResource directly in your code.
+dojo._hasResource["dojox.data.AndOrReadStore"] = true;
+dojo.provide("dojox.data.AndOrReadStore");
+dojo.require("dojo.data.util.filter");
+dojo.require("dojo.data.util.simpleFetch");
+dojo.require("dojo.date.stamp");
+
+
+
+dojo.declare("dojox.data.AndOrReadStore", null,{
+ // summary:
+ // AndOrReadStore uses ItemFileReadStore as a base, modifying only the query (_fetchItems) section.
+ // Supports queries of the form: query:"id:1* OR dept:'Sales Department' || (id:2* && NOT dept:S*)"
+ // Includes legacy/widget support via:
+ // query:{complexQuery:"id:1* OR dept:'Sales Department' || (id:2* && NOT dept:S*)"}
+ // 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._ccUrl = keywordParameters.url;
+ this.url = keywordParameters.url;
+ this._jsonData = keywordParameters.data;
+ this.data = null;
+ 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 = [];
+
+ if(keywordParameters.urlPreventCache !== undefined){
+ this.urlPreventCache = keywordParameters.urlPreventCache?true:false;
+ }
+ if(keywordParameters.hierarchical !== undefined){
+ this.hierarchical = keywordParameters.hierarchical?true:false;
+ }
+ if(keywordParameters.clearOnClose){
+ this.clearOnClose = true;
+ }
+ },
+
+ url: "", // use "" rather than undefined for the benefit of the parser (#3539)
+
+ //Internal var, crossCheckUrl. Used so that setting either url or _jsonFileUrl, can still trigger a reload
+ //when clearOnClose and close is used.
+ _ccUrl: "",
+
+ data: null, //Make this parser settable.
+
+ typeMap: null, //Make this parser settable.
+
+ //Parameter to allow users to specify if a close call should force a reload or not.
+ //By default, it retains the old behavior of not clearing if close is called. But
+ //if set true, the store will be reset to default state. Note that by doing this,
+ //all item handles will become invalid and a new fetch must be issued.
+ clearOnClose: false,
+
+ //Parameter to allow specifying if preventCache should be passed to the xhrGet call or not when loading data from a url.
+ //Note this does not mean the store calls the server on each fetch, only that the data load has preventCache set as an option.
+ //Added for tracker: #6072
+ urlPreventCache: false,
+
+ //Parameter to indicate to process data from the url as hierarchical
+ //(data items can contain other data items in js form). Default is true
+ //for backwards compatibility. False means only root items are processed
+ //as items, all child objects outside of type-mapped objects and those in
+ //specific reference format, are left straight JS data objects.
+ hierarchical: true,
+
+ _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("dojox.data.AndOrReadStore: 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("dojox.data.AndOrReadStore: 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);
+ var arr = item[attribute] || [];
+ // Clone it before returning. refs: #10474
+ return arr.slice(0, arr.length); // 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()
+ this._assertIsItem(item);
+ this._assertIsAttribute(attribute);
+ return (attribute in item);
+ },
+
+ 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()
+ // filter modified to permit complex queries where
+ // logical operators are case insensitive:
+ // , NOT AND OR ( ) ! && ||
+ // Note: "," included for quoted/string legacy queries.
+ var self = this;
+ var filter = function(requestArgs, arrayOfItems){
+ var items = [];
+ if(requestArgs.query){
+ //Complete copy, we may have to mess with it.
+ //Safer than clone, which does a shallow copy, I believe.
+ var query = dojo.fromJson(dojo.toJson(requestArgs.query));
+ //Okay, object form query, we have to check to see if someone mixed query methods (such as using FilteringSelect
+ //with a complexQuery). In that case, the params need to be anded to the complex query statement.
+ //See defect #7980
+ if(typeof query == "object" ){
+ var count = 0;
+ var p;
+ for(p in query){
+ count++;
+ }
+ if(count > 1 && query.complexQuery){
+ var cq = query.complexQuery;
+ var wrapped = false;
+ for(p in query){
+ if(p !== "complexQuery"){
+ //We should wrap this in () as it should and with the entire complex query
+ //Not just part of it.
+ if(!wrapped){
+ cq = "( " + cq + " )";
+ wrapped = true;
+ }
+ //Make sure strings are quoted when going into complexQuery merge.
+ var v = requestArgs.query[p];
+ if(dojo.isString(v)){
+ v = "'" + v + "'";
+ }
+ cq += " AND " + p + ":" + v;
+ delete query[p];
+
+ }
+ }
+ query.complexQuery = cq;
+ }
+ }
+
+ var ignoreCase = requestArgs.queryOptions ? requestArgs.queryOptions.ignoreCase : false;
+ //for complex queries only: pattern = query[:|=]"NOT id:23* AND (type:'test*' OR dept:'bob') && !filed:true"
+ //logical operators are case insensitive: , NOT AND OR ( ) ! && || // "," included for quoted/string legacy queries.
+ if(typeof query != "string"){
+ query = dojo.toJson(query);
+ query = query.replace(/\\\\/g,"\\"); //counter toJson expansion of backslashes, e.g., foo\\*bar test.
+ }
+ query = query.replace(/\\"/g,"\""); //ditto, for embedded \" in lieu of " availability.
+ var complexQuery = dojo.trim(query.replace(/{|}/g,"")); //we can handle these, too.
+ var pos2, i;
+ if(complexQuery.match(/"? *complexQuery *"?:/)){ //case where widget required a json object, so use complexQuery:'the real query'
+ complexQuery = dojo.trim(complexQuery.replace(/"?\s*complexQuery\s*"?:/,""));
+ var quotes = ["'",'"'];
+ var pos1,colon;
+ var flag = false;
+ for(i = 0; i<quotes.length; i++){
+ pos1 = complexQuery.indexOf(quotes[i]);
+ pos2 = complexQuery.indexOf(quotes[i],1);
+ colon = complexQuery.indexOf(":",1);
+ if(pos1 === 0 && pos2 != -1 && colon < pos2){
+ flag = true;
+ break;
+ } //first two sets of quotes don't occur before the first colon.
+ }
+ if(flag){ //dojo.toJson, and maybe user, adds surrounding quotes, which we need to remove.
+ complexQuery = complexQuery.replace(/^\"|^\'|\"$|\'$/g,"");
+ }
+ } //end query="{complexQuery:'id:1* || dept:Sales'}" parsing (for when widget required json object query).
+ var complexQuerySave = complexQuery;
+ //valid logical operators.
+ var begRegExp = /^,|^NOT |^AND |^OR |^\(|^\)|^!|^&&|^\|\|/i; //trailing space on some tokens on purpose.
+ var sQuery = ""; //will be eval'ed for each i-th candidateItem, based on query components.
+ var op = "";
+ var val = "";
+ var pos = -1;
+ var err = false;
+ var key = "";
+ var value = "";
+ var tok = "";
+ pos2 = -1;
+ for(i = 0; i < arrayOfItems.length; ++i){
+ var match = true;
+ var candidateItem = arrayOfItems[i];
+ if(candidateItem === null){
+ match = false;
+ }else{
+ //process entire string for this i-th candidateItem.
+ complexQuery = complexQuerySave; //restore query for next candidateItem.
+ sQuery = "";
+ //work left to right, finding either key:value pair or logical operator at the beginning of the complexQuery string.
+ //when found, concatenate to sQuery and remove from complexQuery and loop back.
+ while(complexQuery.length > 0 && !err){
+ op = complexQuery.match(begRegExp);
+
+ //get/process/append one or two leading logical operators.
+ while(op && !err){ //look for leading logical operators.
+ complexQuery = dojo.trim(complexQuery.replace(op[0],""));
+ op = dojo.trim(op[0]).toUpperCase();
+ //convert some logical operators to their javascript equivalents for later eval.
+ op = op == "NOT" ? "!" : op == "AND" || op == "," ? "&&" : op == "OR" ? "||" : op;
+ op = " " + op + " ";
+ sQuery += op;
+ op = complexQuery.match(begRegExp);
+ }//end op && !err
+
+ //now get/process/append one key:value pair.
+ if(complexQuery.length > 0){
+ pos = complexQuery.indexOf(":");
+ if(pos == -1){
+ err = true;
+ break;
+ }else{
+ key = dojo.trim(complexQuery.substring(0,pos).replace(/\"|\'/g,""));
+ complexQuery = dojo.trim(complexQuery.substring(pos + 1));
+ tok = complexQuery.match(/^\'|^\"/); //quoted?
+ if(tok){
+ tok = tok[0];
+ pos = complexQuery.indexOf(tok);
+ pos2 = complexQuery.indexOf(tok,pos + 1);
+ if(pos2 == -1){
+ err = true;
+ break;
+ }
+ value = complexQuery.substring(pos + 1,pos2);
+ if(pos2 == complexQuery.length - 1){ //quote is last character
+ complexQuery = "";
+ }else{
+ complexQuery = dojo.trim(complexQuery.substring(pos2 + 1));
+ }
+ sQuery += self._containsValue(candidateItem, key, value, dojo.data.util.filter.patternToRegExp(value, ignoreCase));
+ }
+ else{ //not quoted, so a space, comma, or closing parens (or the end) will be the break.
+ tok = complexQuery.match(/\s|\)|,/);
+ if(tok){
+ var pos3 = new Array(tok.length);
+ for(var j = 0;j<tok.length;j++){
+ pos3[j] = complexQuery.indexOf(tok[j]);
+ }
+ pos = pos3[0];
+ if(pos3.length > 1){
+ for(var j=1;j<pos3.length;j++){
+ pos = Math.min(pos,pos3[j]);
+ }
+ }
+ value = dojo.trim(complexQuery.substring(0,pos));
+ complexQuery = dojo.trim(complexQuery.substring(pos));
+ }else{ //not a space, so must be at the end of the complexQuery.
+ value = dojo.trim(complexQuery);
+ complexQuery = "";
+ } //end inner if(tok) else
+ sQuery += self._containsValue(candidateItem, key, value, dojo.data.util.filter.patternToRegExp(value, ignoreCase));
+ } //end outer if(tok) else
+ } //end found ":"
+ } //end if(complexQuery.length > 0)
+ } //end while complexQuery.length > 0 && !err, so finished the i-th item.
+ match = eval(sQuery);
+ } //end else is non-null candidateItem.
+ if(match){
+ items.push(candidateItem);
+ }
+ } //end for/next of all items.
+ if(err){
+ //soft fail.
+ items = [];
+ console.log("The store's _fetchItems failed, probably due to a syntax error in query.");
+ }
+ findCallback(items, requestArgs);
+ }else{
+ // No query...
+ // 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);
+ } //end if there is a query.
+ }; //end filter function
+
+ if(this._loadFinished){
+ filter(keywordArgs, this._getItemsArray(keywordArgs.queryOptions));
+ }else{
+ if(this._jsonFileUrl !== this._ccUrl){
+ dojo.deprecated("dojox.data.AndOrReadStore: ",
+ "To change the url, set the url property of the store," +
+ " not _jsonFileUrl. _jsonFileUrl support will be removed in 2.0");
+ this._ccUrl = this._jsonFileUrl;
+ this.url = this._jsonFileUrl;
+ }else if(this.url !== this._ccUrl){
+ this._jsonFileUrl = this.url;
+ this._ccUrl = this.url;
+ }
+ //See if there was any forced reset of data.
+ if(this.data != null && this._jsonData == null){
+ this._jsonData = this.data;
+ this.data = null;
+ }
+ 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",
+ preventCache: this.urlPreventCache
+ };
+ 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);
+ });
+
+ //Wire up the cancel to abort of the request
+ //This call cancel on the deferred if it hasn't been called
+ //yet and then will chain to the simple abort of the
+ //simpleFetch keywordArgs
+ var oldAbort = null;
+ if(keywordArgs.abort){
+ oldAbort = keywordArgs.abort;
+ }
+ keywordArgs.abort = function(){
+ var df = getHandler;
+ if(df && df.fired === -1){
+ df.cancel();
+ df = null;
+ }
+ if(oldAbort){
+ oldAbort.call(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("dojox.data.AndOrReadStore: No JSON source data was provided as either URL or a nested Javascript object."), keywordArgs);
+ }
+ } //end deferred fetching.
+ }, //end _fetchItems
+
+ _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()
+ if(this.clearOnClose &&
+ this._loadFinished &&
+ !this._loadInProgress){
+ //Reset all internalsback to default state. This will force a reload
+ //on next fetch. This also checks that the data or url param was set
+ //so that the store knows it can get data. Without one of those being set,
+ //the next fetch will trigger an error.
+
+ if(((this._jsonFileUrl == "" || this._jsonFileUrl == null) &&
+ (this.url == "" || this.url == null)
+ ) && this.data == null){
+ console.debug("dojox.data.AndOrReadStore: WARNING! Data reload " +
+ " information has not been provided." +
+ " Please set 'url' or 'data' to the appropriate value before" +
+ " the next fetch");
+ }
+ this._arrayOfAllItems = [];
+ this._arrayOfTopLevelItems = [];
+ this._loadFinished = false;
+ this._itemsByIdentity = null;
+ this._loadInProgress = false;
+ this._queuedFetches = [];
+ }
+ },
+
+ _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...
+
+ var self = this;
+ 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") &&
+ self.hierarchical
+ );
+ return isItem;
+ }
+
+ 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("dojox.data.AndOrReadStore: 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("dojox.data.AndOrReadStore: 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(("_type" in value) && ("_value" in 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("dojox.data.AndOrReadStore: 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("dojox.data.AndOrReadStore: 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._getItemByIdentity(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 !== this._ccUrl){
+ dojo.deprecated("dojox.data.AndOrReadStore: ",
+ "To change the url, set the url property of the store," +
+ " not _jsonFileUrl. _jsonFileUrl support will be removed in 2.0");
+ this._ccUrl = this._jsonFileUrl;
+ this.url = this._jsonFileUrl;
+ }else if(this.url !== this._ccUrl){
+ this._jsonFileUrl = this.url;
+ this._ccUrl = this.url;
+ }
+ //See if there was any forced reset of data.
+ if(this.data != null && this._jsonData == null){
+ this._jsonData = this.data;
+ this.data = null;
+ }
+ if(this._jsonFileUrl){
+
+ if(this._loadInProgress){
+ this._queuedFetches.push({args: keywordArgs});
+ }else{
+ this._loadInProgress = true;
+ var getArgs = {
+ url: self._jsonFileUrl,
+ handleAs: "json-comment-optional",
+ preventCache: this.urlPreventCache
+ };
+ 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 !== this._ccUrl){
+ dojo.deprecated("dojox.data.AndOrReadStore: ",
+ "To change the url, set the url property of the store," +
+ " not _jsonFileUrl. _jsonFileUrl support will be removed in 2.0");
+ this._ccUrl = this._jsonFileUrl;
+ this.url = this._jsonFileUrl;
+ }else if(this.url !== this._ccUrl){
+ this._jsonFileUrl = this.url;
+ this._ccUrl = this.url;
+ }
+ //See if there was any forced reset of data.
+ if(this.data != null && this._jsonData == null){
+ this._jsonData = this.data;
+ this.data = null;
+ }
+ if(this._jsonFileUrl){
+ var getArgs = {
+ url: self._jsonFileUrl,
+ handleAs: "json-comment-optional",
+ preventCache: this.urlPreventCache,
+ 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;
+ }else if(self._loadInProgress){
+ //Okay, we hit an error state we can't recover from. A forced load occurred
+ //while an async load was occurring. Since we cannot block at this point, the best
+ //that can be managed is to throw an error.
+ throw new Error("dojox.data.AndOrReadStore: Unable to perform a synchronous load, an async load is in progress.");
+ }
+ }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(dojox.data.AndOrReadStore,dojo.data.util.simpleFetch);
+
+}
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