#include "node.h"

@implementation Node

-init
{
	next = prev = nil;
}

-free
{
	next = prev = nil;
	[data free];
	return [super free];
}

-setData:(id)new
{
	data = new;
	return self;
}

-(id)getData
{
	return data;
}

-setNext:(id)new
{
	next = new;
	return self;
}

-(id)getNext
{
	return next;
}

-setPrevious:(id)new
{
	prev = new;
	return self;
}

-(id)getPrevious
{
	return prev;
}

-(BOOL)isAttached
{
	if([self isFrontlyAttached] || [self isRearlyAttached])
		return YES;
	else
		return NO;
}

-(BOOL)isDoublyAttached
{
	if([self isFrontlyAttached] && [self isRearlyAttached])
		return YES;
	else
		return NO;
}

-(BOOL)isFrontlyAttached
{
	if(prev)
		return YES;
	else
		return NO;
}

-(BOOL)isRearlyAttached
{
	if(next)
		return YES;
	else
		return NO;
}

@end