/
SimpleKMLLineString.m
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/
SimpleKMLLineString.m
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//
// SimpleKMLLineString.m
//
// Created by Justin R. Miller on 7/6/10.
// Copyright MapBox 2010-2013.
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
//
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
//
// * Redistributions in binary form must reproduce the above copyright
// notice, this list of conditions and the following disclaimer in the
// documentation and/or other materials provided with the distribution.
//
// * Neither the name of MapBox, nor the names of its contributors may be
// used to endorse or promote products derived from this software
// without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
// ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
// WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
// DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
// ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
// (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
// LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
// ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
// SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
//
#import "SimpleKMLLineString.h"
#import <CoreLocation/CoreLocation.h>
@implementation SimpleKMLLineString
@synthesize coordinates;
- (id)initWithXMLNode:(CXMLNode *)node sourceURL:sourceURL error:(NSError **)error
{
self = [super initWithXMLNode:node sourceURL:sourceURL error:error];
if (self != nil)
{
coordinates = nil;
for (CXMLNode *child in [node children])
{
if ([[child name] isEqualToString:@"coordinates"])
{
NSMutableArray *parsedCoordinates = [NSMutableArray array];
NSArray *coordinateStrings = [[child stringValue] componentsSeparatedByCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]];
for (__strong NSString *coordinateString in coordinateStrings)
{
coordinateString = [coordinateString stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]];
if ([coordinateString length])
{
// coordinates should not have whitespace
//
if ([[coordinateString componentsSeparatedByString:@" "] count] > 1)
{
NSDictionary *userInfo = [NSDictionary dictionaryWithObject:@"Improperly formed KML (LineString coordinates have whitespace)"
forKey:NSLocalizedFailureReasonErrorKey];
if (error)
*error = [NSError errorWithDomain:SimpleKMLErrorDomain code:SimpleKMLParseError userInfo:userInfo];
return nil;
}
NSArray *parts = [coordinateString componentsSeparatedByString:@","];
// there should be longitude, latitude, and optionally, altitude
//
if ([parts count] < 2 || [parts count] > 3)
{
NSDictionary *userInfo = [NSDictionary dictionaryWithObject:@"Improperly formed KML (Invalid number of LineString coordinates)"
forKey:NSLocalizedFailureReasonErrorKey];
if (error)
*error = [NSError errorWithDomain:SimpleKMLErrorDomain code:SimpleKMLParseError userInfo:userInfo];
return nil;
}
double longitude = [[parts objectAtIndex:0] doubleValue];
double latitude = [[parts objectAtIndex:1] doubleValue];
// there should be valid values for latitude & longitude
//
if (longitude < -180 || longitude > 180 || latitude < -90 || latitude > 90)
{
NSDictionary *userInfo = [NSDictionary dictionaryWithObject:@"Improperly formed KML (Invalid LineString coordinates values)"
forKey:NSLocalizedFailureReasonErrorKey];
if (error)
*error = [NSError errorWithDomain:SimpleKMLErrorDomain code:SimpleKMLParseError userInfo:userInfo];
return nil;
}
CLLocation *coordinate = [[CLLocation alloc] initWithLatitude:latitude longitude:longitude];
[parsedCoordinates addObject:coordinate];
}
}
coordinates = [NSArray arrayWithArray:parsedCoordinates];
// there should be two or more coordinates
//
if ([coordinates count] < 2)
{
NSDictionary *userInfo = [NSDictionary dictionaryWithObject:@"Improperly formed KML (LineString has less than two coordinates)"
forKey:NSLocalizedFailureReasonErrorKey];
if (error)
*error = [NSError errorWithDomain:SimpleKMLErrorDomain code:SimpleKMLParseError userInfo:userInfo];
return nil;
}
}
}
if ( ! coordinates)
{
NSDictionary *userInfo = [NSDictionary dictionaryWithObject:@"Improperly formed KML (LineString has no coordinates)"
forKey:NSLocalizedFailureReasonErrorKey];
if (error)
*error = [NSError errorWithDomain:SimpleKMLErrorDomain code:SimpleKMLParseError userInfo:userInfo];
return nil;
}
}
return self;
}
@end