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root / trunk / web / dojo / dojox / data / KeyValueStore.js @ 12

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/*
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        Copyright (c) 2004-2010, The Dojo Foundation All Rights Reserved.
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        Available via Academic Free License >= 2.1 OR the modified BSD license.
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        see: http://dojotoolkit.org/license for details
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*/
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if(!dojo._hasResource["dojox.data.KeyValueStore"]){
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dojo._hasResource["dojox.data.KeyValueStore"]=true;
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dojo.provide("dojox.data.KeyValueStore");
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dojo.require("dojo.data.util.filter");
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dojo.require("dojo.data.util.simpleFetch");
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dojo.declare("dojox.data.KeyValueStore",null,{constructor:function(_1){
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if(_1.url){
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this.url=_1.url;
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}
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this._keyValueString=_1.data;
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this._keyValueVar=_1.dataVar;
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this._keyAttribute="key";
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this._valueAttribute="value";
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this._storeProp="_keyValueStore";
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this._features={"dojo.data.api.Read":true,"dojo.data.api.Identity":true};
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this._loadInProgress=false;
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this._queuedFetches=[];
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if(_1&&"urlPreventCache" in _1){
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this.urlPreventCache=_1.urlPreventCache?true:false;
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}
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},url:"",data:"",urlPreventCache:false,_assertIsItem:function(_2){
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if(!this.isItem(_2)){
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throw new Error("dojox.data.KeyValueStore: a function was passed an item argument that was not an item");
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}
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},_assertIsAttribute:function(_3,_4){
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if(!dojo.isString(_4)){
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throw new Error("dojox.data.KeyValueStore: a function was passed an attribute argument that was not an attribute object nor an attribute name string");
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}
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},getValue:function(_5,_6,_7){
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this._assertIsItem(_5);
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this._assertIsAttribute(_5,_6);
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var _8;
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if(_6==this._keyAttribute){
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_8=_5[this._keyAttribute];
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}else{
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_8=_5[this._valueAttribute];
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}
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if(_8===undefined){
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_8=_7;
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}
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return _8;
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},getValues:function(_9,_a){
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var _b=this.getValue(_9,_a);
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return (_b?[_b]:[]);
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},getAttributes:function(_c){
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return [this._keyAttribute,this._valueAttribute,_c[this._keyAttribute]];
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},hasAttribute:function(_d,_e){
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this._assertIsItem(_d);
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this._assertIsAttribute(_d,_e);
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return (_e==this._keyAttribute||_e==this._valueAttribute||_e==_d[this._keyAttribute]);
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},containsValue:function(_f,_10,_11){
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var _12=undefined;
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if(typeof _11==="string"){
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_12=dojo.data.util.filter.patternToRegExp(_11,false);
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}
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return this._containsValue(_f,_10,_11,_12);
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},_containsValue:function(_13,_14,_15,_16){
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var _17=this.getValues(_13,_14);
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for(var i=0;i<_17.length;++i){
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var _18=_17[i];
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if(typeof _18==="string"&&_16){
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return (_18.match(_16)!==null);
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}else{
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if(_15===_18){
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return true;
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}
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}
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}
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return false;
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},isItem:function(_19){
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if(_19&&_19[this._storeProp]===this){
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return true;
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}
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return false;
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},isItemLoaded:function(_1a){
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return this.isItem(_1a);
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},loadItem:function(_1b){
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},getFeatures:function(){
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return this._features;
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},close:function(_1c){
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},getLabel:function(_1d){
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return _1d[this._keyAttribute];
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},getLabelAttributes:function(_1e){
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return [this._keyAttribute];
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},_fetchItems:function(_1f,_20,_21){
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var _22=this;
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var _23=function(_24,_25){
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var _26=null;
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if(_24.query){
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_26=[];
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var _27=_24.queryOptions?_24.queryOptions.ignoreCase:false;
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var _28={};
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for(var key in _24.query){
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var _29=_24.query[key];
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if(typeof _29==="string"){
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_28[key]=dojo.data.util.filter.patternToRegExp(_29,_27);
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}
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}
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for(var i=0;i<_25.length;++i){
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var _2a=true;
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var _2b=_25[i];
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for(var key in _24.query){
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var _29=_24.query[key];
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if(!_22._containsValue(_2b,key,_29,_28[key])){
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_2a=false;
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}
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}
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if(_2a){
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_26.push(_2b);
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}
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}
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}else{
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if(_24.identity){
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_26=[];
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var _2c;
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for(var key in _25){
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_2c=_25[key];
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if(_2c[_22._keyAttribute]==_24.identity){
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_26.push(_2c);
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break;
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}
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}
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}else{
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if(_25.length>0){
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_26=_25.slice(0,_25.length);
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}
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}
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}
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_20(_26,_24);
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};
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if(this._loadFinished){
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_23(_1f,this._arrayOfAllItems);
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}else{
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if(this.url!==""){
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if(this._loadInProgress){
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this._queuedFetches.push({args:_1f,filter:_23});
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}else{
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this._loadInProgress=true;
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var _2d={url:_22.url,handleAs:"json-comment-filtered",preventCache:this.urlPreventCache};
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var _2e=dojo.xhrGet(_2d);
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_2e.addCallback(function(_2f){
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_22._processData(_2f);
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_23(_1f,_22._arrayOfAllItems);
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_22._handleQueuedFetches();
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});
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_2e.addErrback(function(_30){
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_22._loadInProgress=false;
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throw _30;
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});
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}
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}else{
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if(this._keyValueString){
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this._processData(eval(this._keyValueString));
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this._keyValueString=null;
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_23(_1f,this._arrayOfAllItems);
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}else{
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if(this._keyValueVar){
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this._processData(this._keyValueVar);
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this._keyValueVar=null;
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_23(_1f,this._arrayOfAllItems);
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}else{
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throw new Error("dojox.data.KeyValueStore: No source data was provided as either URL, String, or Javascript variable data input.");
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}
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}
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}
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}
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},_handleQueuedFetches:function(){
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if(this._queuedFetches.length>0){
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for(var i=0;i<this._queuedFetches.length;i++){
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var _31=this._queuedFetches[i];
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var _32=_31.filter;
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var _33=_31.args;
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if(_32){
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_32(_33,this._arrayOfAllItems);
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}else{
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this.fetchItemByIdentity(_31.args);
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}
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}
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this._queuedFetches=[];
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}
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},_processData:function(_34){
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this._arrayOfAllItems=[];
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for(var i=0;i<_34.length;i++){
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this._arrayOfAllItems.push(this._createItem(_34[i]));
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}
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this._loadFinished=true;
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this._loadInProgress=false;
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},_createItem:function(_35){
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var _36={};
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_36[this._storeProp]=this;
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for(var i in _35){
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_36[this._keyAttribute]=i;
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_36[this._valueAttribute]=_35[i];
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break;
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}
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return _36;
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},getIdentity:function(_37){
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if(this.isItem(_37)){
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return _37[this._keyAttribute];
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}
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return null;
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},getIdentityAttributes:function(_38){
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return [this._keyAttribute];
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},fetchItemByIdentity:function(_39){
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_39.oldOnItem=_39.onItem;
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_39.onItem=null;
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_39.onComplete=this._finishFetchItemByIdentity;
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this.fetch(_39);
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},_finishFetchItemByIdentity:function(_3a,_3b){
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var _3c=_3b.scope||dojo.global;
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if(_3a.length){
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_3b.oldOnItem.call(_3c,_3a[0]);
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}else{
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_3b.oldOnItem.call(_3c,null);
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}
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}});
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dojo.extend(dojox.data.KeyValueStore,dojo.data.util.simpleFetch);
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}