e44a7e37b6
git-svn-id: https://semanticscuttle.svn.sourceforge.net/svnroot/semanticscuttle/trunk@151 b3834d28-1941-0410-a4f8-b48e95affb8f
381 lines
12 KiB
JavaScript
381 lines
12 KiB
JavaScript
if(!dojo._hasResource["dojox.data.KeyValueStore"]){ //_hasResource checks added by build. Do not use _hasResource directly in your code.
|
|
dojo._hasResource["dojox.data.KeyValueStore"] = true;
|
|
dojo.provide("dojox.data.KeyValueStore");
|
|
|
|
dojo.require("dojo.data.util.filter");
|
|
dojo.require("dojo.data.util.simpleFetch");
|
|
|
|
dojo.declare("dojox.data.KeyValueStore", null, {
|
|
// summary:
|
|
// This is a dojo.data store implementation. It can take in either a Javascript
|
|
// array, JSON string, or URL as the data source. Data is expected to be in the
|
|
// following format:
|
|
// [
|
|
// { "key1": "value1" },
|
|
// { "key2": "value2" }
|
|
// ]
|
|
// This is to mimic the Java Properties file format. Each 'item' from this store
|
|
// is a JS object representing a key-value pair. If an item in the above array has
|
|
// more than one key/value pair, only the first will be used/accessed.
|
|
constructor: function(/* Object */ keywordParameters){
|
|
// summary: constructor
|
|
// keywordParameters: {url: String}
|
|
// keywordParameters: {data: string}
|
|
// keywordParameters: {dataVar: jsonObject}
|
|
if(keywordParameters.url){
|
|
this.url = keywordParameters.url;
|
|
}
|
|
this._keyValueString = keywordParameters.data;
|
|
this._keyValueVar = keywordParameters.dataVar;
|
|
this._keyAttribute = "key";
|
|
this._valueAttribute = "value";
|
|
this._storeProp = "_keyValueStore";
|
|
this._features = {
|
|
'dojo.data.api.Read': true,
|
|
'dojo.data.api.Identity': true
|
|
};
|
|
this._loadInProgress = false; //Got to track the initial load to prevent duelling loads of the dataset.
|
|
this._queuedFetches = [];
|
|
},
|
|
|
|
url: "",
|
|
data: "",
|
|
|
|
_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.KeyValueStore: a function was passed an item argument that was not an item");
|
|
}
|
|
},
|
|
|
|
_assertIsAttribute: function(/* item */ item, /* 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(!dojo.isString(attribute)){
|
|
throw new Error("dojox.data.KeyValueStore: a function was passed an attribute argument that was not an attribute object nor an attribute name string");
|
|
}
|
|
},
|
|
|
|
/***************************************
|
|
dojo.data.api.Read API
|
|
***************************************/
|
|
getValue: function( /* item */ item,
|
|
/* attribute-name-string */ attribute,
|
|
/* value? */ defaultValue){
|
|
// summary:
|
|
// See dojo.data.api.Read.getValue()
|
|
this._assertIsItem(item);
|
|
this._assertIsAttribute(item, attribute);
|
|
if(attribute == this._keyAttribute){ // Looking for key
|
|
return item[this._keyAttribute];
|
|
}
|
|
return item[this._valueAttribute]; // Otherwise, attribute == ('value' || the actual key )
|
|
},
|
|
|
|
getValues: function(/* item */ item,
|
|
/* attribute-name-string */ attribute){
|
|
// summary:
|
|
// See dojo.data.api.Read.getValues()
|
|
// Key/Value syntax does not support multi-valued attributes, so this is just a
|
|
// wrapper function for getValue().
|
|
var value = this.getValue(item, attribute);
|
|
return (value ? [value] : []); //Array
|
|
},
|
|
|
|
getAttributes: function(/* item */ item){
|
|
// summary:
|
|
// See dojo.data.api.Read.getAttributes()
|
|
return [this._keyAttribute, this._valueAttribute, item[this._keyAttribute]];
|
|
},
|
|
|
|
hasAttribute: function( /* item */ item,
|
|
/* attribute-name-string */ attribute){
|
|
// summary:
|
|
// See dojo.data.api.Read.hasAttribute()
|
|
this._assertIsItem(item);
|
|
this._assertIsAttribute(item, attribute);
|
|
return (attribute == this._keyAttribute || attribute == this._valueAttribute || attribute == item[this._keyAttribute]);
|
|
},
|
|
|
|
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 || 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'
|
|
var values = this.getValues(item, attribute);
|
|
for(var i = 0; i < values.length; ++i){
|
|
var possibleValue = values[i];
|
|
if(typeof possibleValue === "string" && regexp){
|
|
return (possibleValue.match(regexp) !== null);
|
|
}else{
|
|
//Non-string matching.
|
|
if(value === possibleValue){
|
|
return true; // Boolean
|
|
}
|
|
}
|
|
}
|
|
return false; // Boolean
|
|
},
|
|
|
|
isItem: function(/* anything */ something){
|
|
// summary:
|
|
// See dojo.data.api.Read.isItem()
|
|
if (something && something[this._storeProp] === this) {
|
|
return true; //Boolean
|
|
}
|
|
return false; //Boolean
|
|
},
|
|
|
|
isItemLoaded: function(/* anything */ something) {
|
|
// summary:
|
|
// See dojo.data.api.Read.isItemLoaded()
|
|
// The KeyValueStore always loads all items, so if it's an item, then it's loaded.
|
|
return this.isItem(something); //Boolean
|
|
},
|
|
|
|
loadItem: function(/* object */ keywordArgs){
|
|
// summary:
|
|
// See dojo.data.api.Read.loadItem()
|
|
// description:
|
|
// The KeyValueStore always loads all items, so if it's an item, then it's loaded.
|
|
// From the dojo.data.api.Read.loadItem docs:
|
|
// If a call to isItemLoaded() returns true before loadItem() is even called,
|
|
// then loadItem() need not do any work at all and will not even invoke
|
|
// the callback handlers.
|
|
},
|
|
|
|
getFeatures: function(){
|
|
// summary:
|
|
// See dojo.data.api.Read.getFeatures()
|
|
return this._features; //Object
|
|
},
|
|
|
|
close: function(/*dojo.data.api.Request || keywordArgs || null */ request){
|
|
// summary:
|
|
// See dojo.data.api.Read.close()
|
|
},
|
|
|
|
getLabel: function(/* item */ item){
|
|
// summary:
|
|
// See dojo.data.api.Read.getLabel()
|
|
return item[this._keyAttribute];
|
|
},
|
|
|
|
getLabelAttributes: function(/* item */ item){
|
|
// summary:
|
|
// See dojo.data.api.Read.getLabelAttributes()
|
|
return [this._keyAttribute];
|
|
},
|
|
|
|
// The dojo.data.api.Read.fetch() function is implemented as
|
|
// a mixin from dojo.data.util.simpleFetch.
|
|
// That mixin requires us to define _fetchItems().
|
|
_fetchItems: function( /* Object */ keywordArgs,
|
|
/* Function */ findCallback,
|
|
/* Function */ errorCallback){
|
|
// summary:
|
|
// See dojo.data.util.simpleFetch.fetch()
|
|
|
|
var self = this;
|
|
|
|
var filter = function(requestArgs, arrayOfAllItems){
|
|
var items = null;
|
|
if(requestArgs.query){
|
|
items = [];
|
|
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 < arrayOfAllItems.length; ++i){
|
|
var match = true;
|
|
var candidateItem = arrayOfAllItems[i];
|
|
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);
|
|
}
|
|
}
|
|
}else if(requestArgs.identity){
|
|
items = [];
|
|
var item;
|
|
for(var key in arrayOfAllItems){
|
|
item = arrayOfAllItems[key];
|
|
if(item[self._keyAttribute] == requestArgs.identity){
|
|
items.push(item);
|
|
break;
|
|
}
|
|
}
|
|
}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.
|
|
if(arrayOfAllItems.length> 0){
|
|
items = arrayOfAllItems.slice(0,arrayOfAllItems.length);
|
|
}
|
|
}
|
|
findCallback(items, requestArgs);
|
|
};
|
|
|
|
if(this._loadFinished){
|
|
filter(keywordArgs, this._arrayOfAllItems);
|
|
}else{
|
|
if(this.url !== ""){
|
|
//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.url,
|
|
handleAs: "json-comment-filtered"
|
|
};
|
|
var getHandler = dojo.xhrGet(getArgs);
|
|
getHandler.addCallback(function(data){
|
|
self._processData(data);
|
|
filter(keywordArgs, self._arrayOfAllItems);
|
|
self._handleQueuedFetches();
|
|
});
|
|
getHandler.addErrback(function(error){
|
|
self._loadInProgress = false;
|
|
throw error;
|
|
});
|
|
}
|
|
}else if(this._keyValueString){
|
|
this._processData(eval(this._keyValueString));
|
|
this._keyValueString = null;
|
|
filter(keywordArgs, this._arrayOfAllItems);
|
|
}else if(this._keyValueVar){
|
|
this._processData(this._keyValueVar);
|
|
this._keyValueVar = null;
|
|
filter(keywordArgs, this._arrayOfAllItems);
|
|
}else{
|
|
throw new Error("dojox.data.KeyValueStore: No source data was provided as either URL, String, or Javascript variable data input.");
|
|
}
|
|
}
|
|
|
|
},
|
|
|
|
_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 delayedFilter = fData.filter;
|
|
var delayedQuery = fData.args;
|
|
if(delayedFilter){
|
|
delayedFilter(delayedQuery, this._arrayOfAllItems);
|
|
}else{
|
|
this.fetchItemByIdentity(fData.args);
|
|
}
|
|
}
|
|
this._queuedFetches = [];
|
|
}
|
|
},
|
|
|
|
_processData: function(/* Array */ data){
|
|
this._arrayOfAllItems = [];
|
|
for(var i=0; i<data.length; i++){
|
|
this._arrayOfAllItems.push(this._createItem(data[i]));
|
|
}
|
|
this._loadFinished = true;
|
|
this._loadInProgress = false;
|
|
},
|
|
|
|
_createItem: function(/* Object */ something){
|
|
var item = {};
|
|
item[this._storeProp] = this;
|
|
for(var i in something){
|
|
item[this._keyAttribute] = i;
|
|
item[this._valueAttribute] = something[i];
|
|
break;
|
|
}
|
|
return item; //Object
|
|
},
|
|
|
|
/***************************************
|
|
dojo.data.api.Identity API
|
|
***************************************/
|
|
getIdentity: function(/* item */ item){
|
|
// summary:
|
|
// See dojo.data.api.Identity.getIdentity()
|
|
if(this.isItem(item)){
|
|
return item[this._keyAttribute]; //String
|
|
}
|
|
return null; //null
|
|
},
|
|
|
|
getIdentityAttributes: function(/* item */ item){
|
|
// summary:
|
|
// See dojo.data.api.Identity.getIdentifierAttributes()
|
|
return [this._keyAttribute];
|
|
},
|
|
|
|
fetchItemByIdentity: function(/* object */ keywordArgs){
|
|
// summary:
|
|
// See dojo.data.api.Identity.fetchItemByIdentity()
|
|
keywordArgs.oldOnItem = keywordArgs.onItem;
|
|
keywordArgs.onItem = null;
|
|
keywordArgs.onComplete = this._finishFetchItemByIdentity ;
|
|
this.fetch(keywordArgs);
|
|
},
|
|
|
|
_finishFetchItemByIdentity: function(/* Array */ items, /* object */ request) {
|
|
var scope = request.scope || dojo.global;
|
|
if(items.length){
|
|
request.oldOnItem.call(scope, items[0]);
|
|
}else{
|
|
request.oldOnItem.call(scope, null);
|
|
}
|
|
}
|
|
});
|
|
//Mix in the simple fetch implementation to this class.
|
|
dojo.extend(dojox.data.KeyValueStore,dojo.data.util.simpleFetch);
|
|
|
|
}
|