#include <Foundation/Foundation.h>

@interface	MyDelegate : NSObject
{
  BOOL		problem;
  unsigned	startDoc;
  unsigned	endDoc;
  unsigned	startElem;
  unsigned	endElem;
}
- (BOOL) check;
@end

@implementation	MyDelegate
- (BOOL) check
{
  if (startDoc != 1)
    {
      problem = YES;
      NSLog(@"Missing start doc");
    }
  if (endDoc != 1)
    {
      problem = YES;
      NSLog(@"Missing end doc");
    }
  if (startElem != 1)
    {
      problem = YES;
      NSLog(@"Missing start element");
    }
  if (endElem != 1)
    {
      problem = YES;
      NSLog(@"Missing end element");
    }
  return problem;
}

- (void) parserDidEndDocument: (NSXMLParser*)aParser
{
  endDoc++;
}
- (void) parserDidStartDocument: (NSXMLParser*)aParser
{
  startDoc++;
}

- (void) parser: (NSXMLParser*)aParser
  didStartElement: (NSString*)anElementName
  namespaceURI: (NSString*)aNamespaceURI
  qualifiedName: (NSString*)aQualifierName
  attributes: (NSDictionary*)anAttributeDict
{
  if (startElem == 0)
    {
      startElem++;
      if ([anElementName isEqual: @"example"] == NO)
	NSLog(@"Bad start element '%@' in namespace '%@' '%@' attributes '%@'",
	anElementName, aNamespaceURI, aQualifierName, anAttributeDict);
    }
  else
    {
      NSLog(@"Extra start element '%@' in namespace '%@' '%@' attributes '%@'",
	anElementName, aNamespaceURI, aQualifierName, anAttributeDict);
    }
}


- (void) parser: (NSXMLParser*)aParser
  didEndElement: (NSString*)anElementName
  namespaceURI: (NSString*)aNamespaceURI
  qualifiedName: (NSString*)aQualifierName
{
  if (endElem == 0)
    {
      endElem++;
      if ([anElementName isEqual: @"example"] == NO)
	NSLog(@"Bad end element '%@' in namespace '%@' '%@'",
	anElementName, aNamespaceURI, aQualifierName);
    }
  else
    {
      NSLog(@"Extra end element '%@' in namespace '%@' '%@'",
	anElementName, aNamespaceURI, aQualifierName);
    }
}


@end

int main ()
{
  NSAutoreleasePool	*pool = [NSAutoreleasePool new];
  NSData	*document;
  MyDelegate	*delegate;
  NSXMLParser	*parser;
  const char	*str =
"<?xml version=\"1.0\"?>"
"<example>"
"</example>";

  document = [NSData dataWithBytes: str length: strlen(str)];
  parser = [[NSXMLParser alloc] initWithData: document];
  delegate = [MyDelegate new];
  [parser setDelegate: delegate];
  [parser setShouldProcessNamespaces: YES];

  if ([parser parse] == NO)
    {
      NSLog(@"Failed to parse example document");
    }
  else if ([delegate check] == NO)
    {
      NSLog(@"All correct.");
    }
  [parser release];
  [pool release];
  return 0;
}