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CsvStore.js

CsvStore.js 8.3 KB
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  1. /*
    2. 

  2. 	Copyright (c) 2004-2009, The Dojo Foundation All Rights Reserved.
    3. 

  3. 	Available via Academic Free License >= 2.1 OR the modified BSD license.
    4. 

  4. 	see: http://dojotoolkit.org/license for details
    5. 

  5. */
    6. 

  6. 

  7. 

  8. if(!dojo._hasResource["dojox.data.CsvStore"]){dojo._hasResource["dojox.data.CsvStore"]=true;dojo.provide("dojox.data.CsvStore");dojo.require("dojo.data.util.filter");dojo.require("dojo.data.util.simpleFetch");dojo.declare("dojox.data.CsvStore",null,{constructor:function(_1){this._attributes=[];this._attributeIndexes={};this._dataArray=[];this._arrayOfAllItems=[];this._loadFinished=false;if(_1.url){this.url=_1.url;}this._csvData=_1.data;if(_1.label){this.label=_1.label;}else{if(this.label===""){this.label=undefined;}}this._storeProp="_csvStore";this._idProp="_csvId";this._features={"dojo.data.api.Read":true,"dojo.data.api.Identity":true};this._loadInProgress=false;this._queuedFetches=[];this.identifier=_1.identifier;if(this.identifier===""){delete this.identifier;}else{this._idMap={};}if("separator" in _1){this.separator=_1.separator;}if("urlPreventCache" in _1){this.urlPreventCache=_1.urlPreventCache?true:false;}},url:"",label:"",identifier:"",separator:",",urlPreventCache:false,_assertIsItem:function(_2){if(!this.isItem(_2)){throw new Error(this.declaredClass+": a function was passed an item argument that was not an item");}},_getIndex:function(_3){var _4=this.getIdentity(_3);if(this.identifier){_4=this._idMap[_4];}return _4;},getValue:function(_5,_6,_7){this._assertIsItem(_5);var _8=_7;if(typeof _6==="string"){var ai=this._attributeIndexes[_6];if(ai!=null){var _9=this._dataArray[this._getIndex(_5)];_8=_9[ai]||_7;}}else{throw new Error(this.declaredClass+": a function was passed an attribute argument that was not a string");}return _8;},getValues:function(_a,_b){var _c=this.getValue(_a,_b);return (_c?[_c]:[]);},getAttributes:function(_d){this._assertIsItem(_d);var _e=[];var _f=this._dataArray[this._getIndex(_d)];for(var i=0;i<_f.length;i++){if(_f[i]!==""){_e.push(this._attributes[i]);}}return _e;},hasAttribute:function(_10,_11){this._assertIsItem(_10);if(typeof _11==="string"){var _12=this._attributeIndexes[_11];var _13=this._dataArray[this._getIndex(_10)];return (typeof _12!=="undefined"&&_12<_13.length&&_13[_12]!=="");}else{throw new Error(this.declaredClass+": a function was passed an attribute argument that was not a string");}},containsValue:function(_14,_15,_16){var _17=undefined;if(typeof _16==="string"){_17=dojo.data.util.filter.patternToRegExp(_16,false);}return this._containsValue(_14,_15,_16,_17);},_containsValue:function(_18,_19,_1a,_1b){var _1c=this.getValues(_18,_19);for(var i=0;i<_1c.length;++i){var _1d=_1c[i];if(typeof _1d==="string"&&_1b){return (_1d.match(_1b)!==null);}else{if(_1a===_1d){return true;}}}return false;},isItem:function(_1e){if(_1e&&_1e[this._storeProp]===this){var _1f=_1e[this._idProp];if(this.identifier){var _20=this._dataArray[this._idMap[_1f]];if(_20){return true;}}else{if(_1f>=0&&_1f<this._dataArray.length){return true;}}}return false;},isItemLoaded:function(_21){return this.isItem(_21);},loadItem:function(_22){},getFeatures:function(){return this._features;},getLabel:function(_23){if(this.label&&this.isItem(_23)){return this.getValue(_23,this.label);}return undefined;},getLabelAttributes:function(_24){if(this.label){return [this.label];}return null;},_fetchItems:function(_25,_26,_27){var _28=this;var _29=function(_2a,_2b){var _2c=null;if(_2a.query){var key,_2d;_2c=[];var _2e=_2a.queryOptions?_2a.queryOptions.ignoreCase:false;var _2f={};for(key in _2a.query){_2d=_2a.query[key];if(typeof _2d==="string"){_2f[key]=dojo.data.util.filter.patternToRegExp(_2d,_2e);}}for(var i=0;i<_2b.length;++i){var _30=true;var _31=_2b[i];for(key in _2a.query){_2d=_2a.query[key];if(!_28._containsValue(_31,key,_2d,_2f[key])){_30=false;}}if(_30){_2c.push(_31);}}}else{_2c=_2b.slice(0,_2b.length);}_26(_2c,_2a);};if(this._loadFinished){_29(_25,this._arrayOfAllItems);}else{if(this.url!==""){if(this._loadInProgress){this._queuedFetches.push({args:_25,filter:_29});}else{this._loadInProgress=true;var _32={url:_28.url,handleAs:"text",preventCache:_28.urlPreventCache};var _33=dojo.xhrGet(_32);_33.addCallback(function(_34){try{_28._processData(_34);_29(_25,_28._arrayOfAllItems);_28._handleQueuedFetches();}catch(e){_27(e,_25);}});_33.addErrback(function(_35){_28._loadInProgress=false;if(_27){_27(_35,_25);}else{throw _35;}});var _36=null;if(_25.abort){_36=_25.abort;}_25.abort=function(){var df=_33;if(df&&df.fired===-1){df.cancel();df=null;}if(_36){_36.call(_25);}};}}else{if(this._csvData){try{this._processData(this._csvData);this._csvData=null;_29(_25,this._arrayOfAllItems);}catch(e){_27(e,_25);}}else{var _37=new Error(this.declaredClass+": No CSV source data was provided as either URL or String data input.");if(_27){_27(_37,_25);}else{throw _37;}}}}},close:function(_38){},_getArrayOfArraysFromCsvFileContents:function(_39){if(dojo.isString(_39)){var _3a=new RegExp("^\\s+","g");var _3b=new RegExp("\\s+$","g");var _3c=new RegExp("\"\"","g");var _3d=[];var i;var _3e=this._splitLines(_39);for(i=0;i<_3e.length;++i){var _3f=_3e[i];if(_3f.length>0){var _40=_3f.split(this.separator);var j=0;while(j<_40.length){var _41=_40[j];var _42=_41.replace(_3a,"");var _43=_42.replace(_3b,"");var _44=_43.charAt(0);var _45=_43.charAt(_43.length-1);var _46=_43.charAt(_43.length-2);var _47=_43.charAt(_43.length-3);if(_43.length===2&&_43=="\"\""){_40[j]="";}else{if((_44=="\"")&&((_45!="\"")||((_45=="\"")&&(_46=="\"")&&(_47!="\"")))){if(j+1===_40.length){return;}var _48=_40[j+1];_40[j]=_42+this.separator+_48;_40.splice(j+1,1);}else{if((_44=="\"")&&(_45=="\"")){_43=_43.slice(1,(_43.length-1));_43=_43.replace(_3c,"\"");}_40[j]=_43;j+=1;}}}_3d.push(_40);}}this._attributes=_3d.shift();for(i=0;i<this._attributes.length;i++){this._attributeIndexes[this._attributes[i]]=i;}this._dataArray=_3d;}},_splitLines:function(_49){var _4a=[];var i;var _4b="";var _4c=false;for(i=0;i<_49.length;i++){var c=_49.charAt(i);switch(c){case "\"":_4c=!_4c;_4b+=c;break;case "\r":if(_4c){_4b+=c;}else{_4a.push(_4b);_4b="";if(i<(_49.length-1)&&_49.charAt(i+1)=="\n"){i++;}}break;case "\n":if(_4c){_4b+=c;}else{_4a.push(_4b);_4b="";}break;default:_4b+=c;}}if(_4b!==""){_4a.push(_4b);}return _4a;},_processData:function(_4d){this._getArrayOfArraysFromCsvFileContents(_4d);this._arrayOfAllItems=[];if(this.identifier){if(this._attributeIndexes[this.identifier]===undefined){throw new Error(this.declaredClass+": Identity specified is not a column header in the data set.");}}for(var i=0;i<this._dataArray.length;i++){var id=i;if(this.identifier){var _4e=this._dataArray[i];id=_4e[this._attributeIndexes[this.identifier]];this._idMap[id]=i;}this._arrayOfAllItems.push(this._createItemFromIdentity(id));}this._loadFinished=true;this._loadInProgress=false;},_createItemFromIdentity:function(_4f){var _50={};_50[this._storeProp]=this;_50[this._idProp]=_4f;return _50;},getIdentity:function(_51){if(this.isItem(_51)){return _51[this._idProp];}return null;},fetchItemByIdentity:function(_52){var _53;var _54=_52.scope?_52.scope:dojo.global;if(!this._loadFinished){var _55=this;if(this.url!==""){if(this._loadInProgress){this._queuedFetches.push({args:_52});}else{this._loadInProgress=true;var _56={url:_55.url,handleAs:"text"};var _57=dojo.xhrGet(_56);_57.addCallback(function(_58){try{_55._processData(_58);var _59=_55._createItemFromIdentity(_52.identity);if(!_55.isItem(_59)){_59=null;}if(_52.onItem){_52.onItem.call(_54,_59);}_55._handleQueuedFetches();}catch(error){if(_52.onError){_52.onError.call(_54,error);}}});_57.addErrback(function(_5a){this._loadInProgress=false;if(_52.onError){_52.onError.call(_54,_5a);}});}}else{if(this._csvData){try{_55._processData(_55._csvData);_55._csvData=null;_53=_55._createItemFromIdentity(_52.identity);if(!_55.isItem(_53)){_53=null;}if(_52.onItem){_52.onItem.call(_54,_53);}}catch(e){if(_52.onError){_52.onError.call(_54,e);}}}}}else{_53=this._createItemFromIdentity(_52.identity);if(!this.isItem(_53)){_53=null;}if(_52.onItem){_52.onItem.call(_54,_53);}}},getIdentityAttributes:function(_5b){if(this.identifier){return [this.identifier];}else{return null;}},_handleQueuedFetches:function(){if(this._queuedFetches.length>0){for(var i=0;i<this._queuedFetches.length;i++){var _5c=this._queuedFetches[i];var _5d=_5c.filter;var _5e=_5c.args;if(_5d){_5d(_5e,this._arrayOfAllItems);}else{this.fetchItemByIdentity(_5c.args);}}this._queuedFetches=[];}}});dojo.extend(dojox.data.CsvStore,dojo.data.util.simpleFetch);}
    9.