FileSystemItem.h

/*
     File: FileSystemItem.h
 Abstract:  The data source backend for displaying the file system.
 This object can be improved a great deal; it never frees nodes that are expanded; it also is not too lazy when it comes to computing the children (when the number of children at a level are asked for, it computes the children array).
  Version: 1.2
 
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#import <Foundation/Foundation.h>

@interface FileSystemItem : NSObject {
    NSString *relativePath;
    FileSystemItem *parent;
    NSMutableArray *children;
    NSString *attributes;
    BOOL isDir;
}

+ (FileSystemItem *)rootItem;
- (NSInteger)numberOfChildren;			// Returns -1 for leaf nodes
- (FileSystemItem *)childAtIndex:(NSInteger)n;	// Invalid to call on leaf nodes
- (NSString *)fullPath;
- (NSString *)relativePath;
- (NSString *)attributes;
- (BOOL)isDir;
@end