jpath.min.js

(function(Array,undef){var TRUE=!0,FALSE=!1,STRING="string",FUNCTION="function",PERIOD=".",EMPTY="",NULL=null,rxTokens=/([A-Za-z0-9_\*@\$\(\)]+(?:\[.+?\])?)/g,rxIndex=/^(\S+)\((\d+)\)$/,rxPairs=/(\(+)?([\w\.\(\)\$\_]+)(?:\s*)([\=\^\!\*\~\>\<\?\$]{1,2})\s*(?:\s*)("(?:[^"\\]|\\.)*"|'(?:[^'\\]|\\.)*'|[^' \&\|\)\(]+)\s*(\)+)?/g,rxCondition=/(\S+)\[(.+)\]/,rxTrim=/\S+(?:\s+\S+)*/,rxEscQuote=/\\('|")/g,app=Array.prototype.push,apc=Array.prototype.concat,hidden={trim:function(s){var str=s.match(rxTrim);
return str?str[0]:EMPTY},qtrim:function(s){return(!s.indexOf("'")||!s.indexOf('"'))&&(s.slice(-1)==="'"||s.slice(-1)==='"')?s.slice(1,-1):s},toArray:function(o){return o instanceof Array?o:o===undef||o===NULL?[]:[o]},traverse:function(pattern,cfn,obj){var out,data=obj||this.data,temp,tokens,token,idxToken,index,expToken,condition,tail,self=arguments.callee,found,i,j,l;if(data&&typeof pattern===STRING){tokens=pattern.match(rxTokens);token=tokens[0];tail=tokens.slice(1).join(PERIOD);if(data instanceof
Array){temp=[];for(i=0,j;(j=data[i])!=NULL;i++){found=self.call(this,token,cfn,j);if(found instanceof Array&&found.length||found!==undef)app.call(temp,found)}if(temp.length)return tail?self.call(this,tail,cfn,temp):temp;else return}else if(token==="*")return tail?self.call(this,tail,cfn,data):data;else if(data[token]!==undef)return tail?self.call(this,tail,cfn,data[token]):data[token];else if(rxIndex.test(token)){idxToken=token.match(rxIndex);token=idxToken[1];index=+idxToken[2];temp=data[token];
return tail?self.call(this,tail,cfn,temp&&temp.length?temp[index]:temp):temp&&temp.length?temp[index]:temp}else if(rxCondition.test(token)){expToken=token.match(rxCondition);token=expToken[1];condition=expToken[2];var evalStr,isMatch,subset=token==="*"?data:data[token],elem;if(subset instanceof Array){temp=[];for(i=0;(elem=subset[i])!=NULL;i++){evalStr=condition.replace(rxPairs,function(match,pl,left,operator,right,pr){return[pl,hidden.testPairs.call(elem,left,right,operator,cfn),pr].join(EMPTY)});
isMatch=eval(evalStr);if(isMatch)app.call(temp,elem)}if(temp.length)return tail?self.call(this,tail,cfn,temp):temp;else return}else{elem=subset;evalStr=condition.replace(rxPairs,function(match,pl,left,operator,right,pr){return[pl,hidden.testPairs.call(elem,left,right,operator,cfn),pr].join(EMPTY)});isMatch=eval(evalStr);if(isMatch)return tail?self.call(this,tail,cfn,elem):elem}}}return out},matchTypes:function(a,b){var _a,_b;switch(typeof a){case STRING:_b=b+EMPTY;break;case "boolean":_b=b==="true"?
TRUE:FALSE;break;case "number":_b=+b;break;case "date":_b=(new Date(b)).valueOf();_a=a.valueOf();break;default:_b=b}if(b==="null")_b=NULL;if(b==="undefined")_b=undef;return{left:_a||a,right:_b}},testPairs:function(){var conditions={"=":function(l,r){return l===r},"==":function(l,r){return l===r},"!=":function(l,r){return l!==r},"<":function(l,r){return l<r},"<=":function(l,r){return l<=r},">":function(l,r){return l>r},">=":function(l,r){return l>=r},"~=":function(l,r){return(l+EMPTY).toLowerCase()===
(r+EMPTY).toLowerCase()},"^=":function(l,r){return!(l+EMPTY).indexOf(r)},"$=":function(l,r){return r+EMPTY===(l+EMPTY).slice(-(r+EMPTY).length)},"*=":function(l,r){return(l+EMPTY).toLowerCase().indexOf((r+EMPTY).toLowerCase())!==-1}};return function(left,right,operator,fn){var out=FALSE,leftVal=left.indexOf(PERIOD)>=0?hidden.traverse(left,NULL,this):this[left],pairs=hidden.matchTypes(leftVal,hidden.trim(hidden.qtrim(right)).replace(rxEscQuote,"$1"));if(operator==="?"){if(typeof fn===FUNCTION)out=
fn.call(this,pairs.left,right)}else out=conditions[operator](pairs.left,pairs.right);return out}}(),merge:function(pattern){var out=[],temp=hidden.toArray(pattern?hidden.traverse.apply(this,arguments):this.selection);out=apc.apply([],temp);return out}},module={};function JPath(obj){if(!(this instanceof JPath))return new JPath(obj);this.data=obj||NULL;this.selection=[]}JPath.prototype={from:function(obj){this.data=obj;return this},first:function(){return this.selection.length?this.selection[0]:NULL},
last:function(){return this.selection.length?this.selection.slice(-1)[0]:NULL},eq:function(idx){return this.selection.length?this.selection[idx]:NULL},select:function(pattern,cfn,obj){this.selection=hidden.merge.apply(this,arguments);return this},and:function(pattern){this.selection=this.selection.concat(hidden.merge.apply(this,arguments));return this},val:function(){return this.selection}};module.select=function(obj,pattern,cfn){return JPath(obj).select(pattern,cfn,NULL)};module.filter=function(obj,
pattern,cfn){return JPath(obj).select(pattern,cfn,NULL).val()};window.jPath=window.jPath||module})(Array);