ResultPrinter

function

ResultPrinter()

Option name	Type	Description
childOperator	Object	the root operator
columns	Object	an array of output column names in the correct order

function ResultPrinter(childOperator, columns) {
		var self = this;

getJSON

method

self.getJSON()

Option name	Type	Description
callback	Object	executes the callback function once completed passing the JSON result

self.getJSON = function(callback){
			var json = [],
				next = childOperator.getNextValueBlock();

			//null check
			if(next == null){
				callback(json);
				return;
			}

			do{
				if(next instanceof Block)
					json[columns[0]] = next.getNext().value;
				else if(next.length > 0){
					for(var i = 0; i < next.length; i++){
						var row = {};
						for(var j = 0; j < next[i].length; j++)
							if(next[i][j] instanceof Block)
								row[columns[j]] = next[i][j].getNext().value; //need to check column length!
						json.push(row);
					}
				}
				next = childOperator.getNextValueBlock();
			}while(next != null);
			callback(json);
		};
	}
	return ResultPrinter;
});