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| dojo.provide("custom.dojo.data.ItemFileReadStoreQueryCapable");
dojo.require("dojo.data.ItemFileReadStore");
dojo.declare("custom.dojo.data.ItemFileReadStoreQueryCapable", [dojo.data.ItemFileReadStore], {
_fetchItems: function( /* Object */ keywordArgs,
/* Function */ findCallback,
/* Function */ errorCallback){
// summary:
// See dojo.data.util.simpleFetch.fetch()
var self = this,
filter = function(requestArgs, arrayOfItems){
var items = [],
i, key;
if(requestArgs.query){
var value,
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(key in requestArgs.query){
value = requestArgs.query[key];
if(typeof value === "string"){
regexpList[key] = dojo.data.util.filter.patternToRegExp(value, ignoreCase);
}else if(value instanceof RegExp){
regexpList[key] = value;
}
}
for(i = 0; i < arrayOfItems.length; ++i){
var match = true;
var candidateItem = arrayOfItems[i];
if(candidateItem === null){
match = false;
}else{
for(key in requestArgs.query){
value = requestArgs.query[key];
// this is the beginning of the customization :
if(dojo.isFunction(value))
{
if(!value(self,candidateItem))
{
match = false;
}
}
// the end of what's added
else 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(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{
//Do a check on the JsonFileUrl and crosscheck it.
//If it doesn't match the cross-check, it needs to be updated
//This allows for either url or _jsonFileUrl to he changed to
//reset the store load location. Done this way for backwards
//compatibility. People use _jsonFileUrl (even though officially
//private.
if(this._jsonFileUrl !== this._ccUrl){
dojo.deprecated("dojo.data.ItemFileReadStore: ",
"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 = 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,
failOk: this.failOk
};
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("dojo.data.ItemFileReadStore: No JSON source data was provided as either URL or a nested Javascript object."), keywordArgs);
}
}
}
}); |
