root / trunk / web / dojo / dojox / data / QueryReadStore.js
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| 1 | 9 | andrej.cim | /*
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| 2 | Copyright (c) 2004-2010, The Dojo Foundation All Rights Reserved.
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| 3 | Available via Academic Free License >= 2.1 OR the modified BSD license.
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| 4 | see: http://dojotoolkit.org/license for details
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| 5 | */
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| 6 | |||
| 7 | |||
| 8 | if(!dojo._hasResource["dojox.data.QueryReadStore"]){ |
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| 9 | dojo._hasResource["dojox.data.QueryReadStore"]=true; |
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| 10 | dojo.provide("dojox.data.QueryReadStore");
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| 11 | dojo.require("dojo.string");
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| 12 | dojo.require("dojo.data.util.sorter");
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| 13 | dojo.declare("dojox.data.QueryReadStore",null,{url:"",requestMethod:"get",_className:"dojox.data.QueryReadStore",_items:[],_lastServerQuery:null,_numRows:-1,lastRequestHash:null,doClientPaging:false,doClientSorting:false,_itemsByIdentity:null,_identifier:null,_features:{"dojo.data.api.Read":true,"dojo.data.api.Identity":true},_labelAttr:"label",constructor:function(_1){ |
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| 14 | dojo.mixin(this,_1);
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| 15 | },getValue:function(_2,_3,_4){ |
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| 16 | this._assertIsItem(_2);
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| 17 | if(!dojo.isString(_3)){
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| 18 | throw new Error(this._className+".getValue(): Invalid attribute, string expected!"); |
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| 19 | } |
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| 20 | if(!this.hasAttribute(_2,_3)){ |
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| 21 | if(_4){
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| 22 | return _4;
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| 23 | } |
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| 24 | } |
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| 25 | return _2.i[_3];
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| 26 | },getValues:function(_5,_6){ |
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| 27 | this._assertIsItem(_5);
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| 28 | var _7=[];
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| 29 | if(this.hasAttribute(_5,_6)){ |
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| 30 | _7.push(_5.i[_6]); |
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| 31 | } |
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| 32 | return _7;
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| 33 | },getAttributes:function(_8){ |
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| 34 | this._assertIsItem(_8);
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| 35 | var _9=[];
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| 36 | for(var i in _8.i){ |
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| 37 | _9.push(i); |
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| 38 | } |
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| 39 | return _9;
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| 40 | },hasAttribute:function(_a,_b){ |
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| 41 | return this.isItem(_a)&&typeof _a.i[_b]!="undefined"; |
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| 42 | },containsValue:function(_c,_d,_e){ |
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| 43 | var _f=this.getValues(_c,_d); |
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| 44 | var len=_f.length;
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| 45 | for(var i=0;i<len;i++){ |
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| 46 | if(_f[i]==_e){
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| 47 | return true; |
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| 48 | } |
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| 49 | } |
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| 50 | return false; |
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| 51 | },isItem:function(_10){ |
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| 52 | if(_10){
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| 53 | return typeof _10.r!="undefined"&&_10.r==this; |
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| 54 | } |
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| 55 | return false; |
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| 56 | },isItemLoaded:function(_11){ |
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| 57 | return this.isItem(_11); |
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| 58 | },loadItem:function(_12){ |
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| 59 | if(this.isItemLoaded(_12.item)){ |
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| 60 | return;
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| 61 | } |
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| 62 | },fetch:function(_13){ |
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| 63 | _13=_13||{};
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| 64 | if(!_13.store){
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| 65 | _13.store=this;
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| 66 | } |
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| 67 | var _14=this; |
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| 68 | var _15=function(_16,_17){ |
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| 69 | if(_17.onError){
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| 70 | var _18=_17.scope||dojo.global;
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| 71 | _17.onError.call(_18,_16,_17); |
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| 72 | } |
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| 73 | }; |
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| 74 | var _19=function(_1a,_1b,_1c){ |
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| 75 | var _1d=_1b.abort||null; |
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| 76 | var _1e=false; |
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| 77 | var _1f=_1b.start?_1b.start:0; |
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| 78 | if(_14.doClientPaging==false){ |
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| 79 | _1f=0;
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| 80 | } |
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| 81 | var _20=_1b.count?(_1f+_1b.count):_1a.length;
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| 82 | _1b.abort=function(){ |
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| 83 | _1e=true;
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| 84 | if(_1d){
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| 85 | _1d.call(_1b); |
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| 86 | } |
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| 87 | }; |
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| 88 | var _21=_1b.scope||dojo.global;
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| 89 | if(!_1b.store){
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| 90 | _1b.store=_14; |
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| 91 | } |
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| 92 | if(_1b.onBegin){
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| 93 | _1b.onBegin.call(_21,_1c,_1b); |
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| 94 | } |
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| 95 | if(_1b.sort&&_14.doClientSorting){
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| 96 | _1a.sort(dojo.data.util.sorter.createSortFunction(_1b.sort,_14)); |
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| 97 | } |
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| 98 | if(_1b.onItem){
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| 99 | for(var i=_1f;(i<_1a.length)&&(i<_20);++i){ |
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| 100 | var _22=_1a[i];
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| 101 | if(!_1e){
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| 102 | _1b.onItem.call(_21,_22,_1b); |
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| 103 | } |
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| 104 | } |
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| 105 | } |
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| 106 | if(_1b.onComplete&&!_1e){
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| 107 | var _23=null; |
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| 108 | if(!_1b.onItem){
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| 109 | _23=_1a.slice(_1f,_20); |
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| 110 | } |
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| 111 | _1b.onComplete.call(_21,_23,_1b); |
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| 112 | } |
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| 113 | }; |
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| 114 | this._fetchItems(_13,_19,_15);
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| 115 | return _13;
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| 116 | },getFeatures:function(){ |
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| 117 | return this._features; |
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| 118 | },close:function(_24){ |
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| 119 | },getLabel:function(_25){ |
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| 120 | if(this._labelAttr&&this.isItem(_25)){ |
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| 121 | return this.getValue(_25,this._labelAttr); |
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| 122 | } |
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| 123 | return undefined; |
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| 124 | },getLabelAttributes:function(_26){ |
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| 125 | if(this._labelAttr){ |
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| 126 | return [this._labelAttr]; |
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| 127 | } |
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| 128 | return null; |
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| 129 | },_xhrFetchHandler:function(_27,_28,_29,_2a){ |
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| 130 | _27=this._filterResponse(_27);
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| 131 | if(_27.label){
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| 132 | this._labelAttr=_27.label;
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| 133 | } |
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| 134 | var _2b=_27.numRows||-1; |
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| 135 | this._items=[];
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| 136 | dojo.forEach(_27.items,function(e){
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| 137 | this._items.push({i:e,r:this}); |
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| 138 | },this);
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| 139 | var _2c=_27.identifier;
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| 140 | this._itemsByIdentity={};
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| 141 | if(_2c){
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| 142 | this._identifier=_2c;
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| 143 | var i;
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| 144 | for(i=0;i<this._items.length;++i){ |
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| 145 | var _2d=this._items[i].i; |
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| 146 | var _2e=_2d[_2c];
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| 147 | if(!this._itemsByIdentity[_2e]){ |
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| 148 | this._itemsByIdentity[_2e]=_2d;
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| 149 | }else{
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| 150 | throw new Error(this._className+": The json data as specified by: ["+this.url+"] is malformed. Items within the list have identifier: ["+_2c+"]. Value collided: ["+_2e+"]"); |
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| 151 | } |
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| 152 | } |
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| 153 | }else{
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| 154 | this._identifier=Number;
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| 155 | for(i=0;i<this._items.length;++i){ |
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| 156 | this._items[i].n=i;
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| 157 | } |
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| 158 | } |
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| 159 | _2b=this._numRows=(_2b===-1)?this._items.length:_2b; |
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| 160 | _29(this._items,_28,_2b);
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| 161 | this._numRows=_2b;
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| 162 | },_fetchItems:function(_2f,_30,_31){ |
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| 163 | var _32=_2f.serverQuery||_2f.query||{};
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| 164 | if(!this.doClientPaging){ |
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| 165 | _32.start=_2f.start||0;
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| 166 | if(_2f.count){
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| 167 | _32.count=_2f.count; |
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| 168 | } |
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| 169 | } |
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| 170 | if(!this.doClientSorting&&_2f.sort){ |
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| 171 | var _33=[];
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| 172 | dojo.forEach(_2f.sort,function(_34){
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| 173 | if(_34&&_34.attribute){
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| 174 | _33.push((_34.descending?"-":"")+_34.attribute); |
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| 175 | } |
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| 176 | }); |
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| 177 | _32.sort=_33.join(",");
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| 178 | } |
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| 179 | if(this.doClientPaging&&this._lastServerQuery!==null&&dojo.toJson(_32)==dojo.toJson(this._lastServerQuery)){ |
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| 180 | this._numRows=(this._numRows===-1)?this._items.length:this._numRows; |
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| 181 | _30(this._items,_2f,this._numRows); |
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| 182 | }else{
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| 183 | var _35=this.requestMethod.toLowerCase()=="post"?dojo.xhrPost:dojo.xhrGet; |
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| 184 | var _36=_35({url:this.url,handleAs:"json-comment-optional",content:_32}); |
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| 185 | _36.addCallback(dojo.hitch(this,function(_37){ |
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| 186 | this._xhrFetchHandler(_37,_2f,_30,_31);
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| 187 | })); |
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| 188 | _36.addErrback(function(_38){
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| 189 | _31(_38,_2f); |
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| 190 | }); |
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| 191 | this.lastRequestHash=new Date().getTime()+"-"+String(Math.random()).substring(2); |
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| 192 | this._lastServerQuery=dojo.mixin({},_32);
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| 193 | } |
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| 194 | },_filterResponse:function(_39){ |
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| 195 | return _39;
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| 196 | },_assertIsItem:function(_3a){ |
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| 197 | if(!this.isItem(_3a)){ |
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| 198 | throw new Error(this._className+": Invalid item argument."); |
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| 199 | } |
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| 200 | },_assertIsAttribute:function(_3b){ |
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| 201 | if(typeof _3b!=="string"){ |
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| 202 | throw new Error(this._className+": Invalid attribute argument ('"+_3b+"')."); |
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| 203 | } |
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| 204 | },fetchItemByIdentity:function(_3c){ |
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| 205 | if(this._itemsByIdentity){ |
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| 206 | var _3d=this._itemsByIdentity[_3c.identity]; |
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| 207 | if(!(_3d===undefined)){ |
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| 208 | if(_3c.onItem){
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| 209 | var _3e=_3c.scope?_3c.scope:dojo.global;
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| 210 | _3c.onItem.call(_3e,{i:_3d,r:this});
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| 211 | } |
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| 212 | return;
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| 213 | } |
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| 214 | } |
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| 215 | var _3f=function(_40,_41){ |
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| 216 | var _42=_3c.scope?_3c.scope:dojo.global;
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| 217 | if(_3c.onError){
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| 218 | _3c.onError.call(_42,_40); |
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| 219 | } |
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| 220 | }; |
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| 221 | var _43=function(_44,_45){ |
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| 222 | var _46=_3c.scope?_3c.scope:dojo.global;
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| 223 | try{
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| 224 | var _47=null; |
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| 225 | if(_44&&_44.length==1){ |
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| 226 | _47=_44[0];
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| 227 | } |
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| 228 | if(_3c.onItem){
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| 229 | _3c.onItem.call(_46,_47); |
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| 230 | } |
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| 231 | } |
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| 232 | catch(error){
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| 233 | if(_3c.onError){
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| 234 | _3c.onError.call(_46,error); |
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| 235 | } |
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| 236 | } |
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| 237 | }; |
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| 238 | var _48={serverQuery:{id:_3c.identity}}; |
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| 239 | this._fetchItems(_48,_43,_3f);
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| 240 | },getIdentity:function(_49){ |
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| 241 | var _4a=null; |
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| 242 | if(this._identifier===Number){ |
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| 243 | _4a=_49.n; |
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| 244 | }else{
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| 245 | _4a=_49.i[this._identifier];
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| 246 | } |
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| 247 | return _4a;
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| 248 | },getIdentityAttributes:function(_4b){ |
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| 249 | return [this._identifier]; |
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| 250 | }}); |
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| 251 | } |