| Option name | Type | Description |
|---|---|---|
| leftOperator | Object | the left side of the and statement |
| rightOperator | Object | the right side of the and statement |
And operator. Combines two child operators and returns a position block when matched
function AndOperator(leftOperator, rightOperator){
var self = this;
this.rightOperator = rightOperator;
Operator.call(this, leftOperator);
Get the next matching block from both left and right operators
self.getNextValueBlock = function(){
if(this.childOperator != null && this.rightOperator != null){
var left = this.childOperator.getNextValueBlock();
var right = this.rightOperator.getNextValueBlock();
//null check
if(left == null || right == null)
return null;
//if the positions are equal
if(left.position === right.position)
return new BasicBlock(true, left.position);
//find a matching position...
var found = false;
do{
if(left == null || right == null)
found = true;
else if(left.position === right.position)
found = true;
else if(left.position > right.position)
right = this.rightOperator.getNextValueBlock();
else if(left.position < right.position)
left = this.childOperator.getNextValueBlock();
}while(!found);
if(left == null || right == null)
return null;
}
return new BasicBlock(true, left.position);
};
Get the next position block
self.getNextPositionBlock = function(){
};
}
AndOperator.prototype = Object.create(Operator.prototype);
AndOperator.prototype.constructor = AndOperator;
return AndOperator;
});