CPoint.m

//
//  Point.m
//  DBScan
//
//  Created by Christian Vogel on 02.03.12.
//  Copyright (c) 2012 __MyCompanyName__. All rights reserved.
//

#import "CPoint.h"

@implementation CPoint

@synthesize coordinates = _coordinates;

- (id)init {
    self = [super init];

    if (self)
        _coordinates = [NSMutableArray array];

    return self;
}

- (void)addCoordinate:(float)coordinate {
    [_coordinates addObject:[NSNumber numberWithFloat:coordinate]];
}

- (float)coordinateAtPosition:(int)position {
    if ((position < 0) || (position > [_coordinates count]))
        [NSException raise:@"Invalid input." format:@"position %i is invalid", position];

    return [[_coordinates objectAtIndex:position] floatValue];
}

- (NSUInteger)dimension {
    return _coordinates.count;
}

- (NSString *)description {
    NSString *result = @"";

    for (int i = 0; i < _coordinates.count; i++) {
        result = [result stringByAppendingString:[[_coordinates objectAtIndex:i] description]];

        if (i < (_coordinates.count - 1))
            result = [result stringByAppendingString:@","];
    }

    return result;
}

+ (id)pointWithCoordinates:(NSArray *)coordinates {
    CPoint *copy = [CPoint new];

    for (int i = 0; i < coordinates.count; i++) {
        float coordinate = [[coordinates objectAtIndex:i] floatValue];
        [copy addCoordinate:coordinate];
    }

    return copy;
}

- (BOOL)isEqual:(id)object {
    if (object == self)
        return YES;


    if (!object || ![object isKindOfClass:[self class]])
        return NO;


    CPoint *other = object;

    if (_coordinates.count != other.coordinates.count)
        return NO;


    for (int i = 0; i < _coordinates.count; i++) {
        float selfAttr  = [[_coordinates objectAtIndex:i] floatValue];
        float otherAttr = [[[other coordinates] objectAtIndex:i] floatValue];

        if (selfAttr != otherAttr)
            return NO;
    }

    return YES;
}

@end