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/**Interface for NSMetadataQuery for GNUStep
   Copyright (C) 2012 Free Software Foundation, Inc.

   Written by: Gregory Casamento
   Date: 2012
   
   This file is part of the GNUstep Base Library.

   This library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Lesser General Public
   License as published by the Free Software Foundation; either
   version 2 of the License, or (at your option) any later version.
   
   This library is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   Library General Public License for more details.
   
   You should have received a copy of the GNU Lesser General Public
   License along with this library; if not, write to the Free
   Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
   Boston, MA 02111 USA.

   AutogsdocSource: NSMetadataQuery.h
*/ 

#ifndef __NSMetadata_h_GNUSTEP_BASE_INCLUDE
#define __NSMetadata_h_GNUSTEP_BASE_INCLUDE
#import	<GNUstepBase/GSVersionMacros.h>

#import <Foundation/NSObject.h>
#import <Foundation/NSTimer.h>

@class NSPredicate, NSMutableDictionary, NSDictionary, NSMutableArray;
@protocol NSMetadataQueryDelegate;

// Metadata item constants...
GS_EXPORT NSString * const NSMetadataItemFSNameKey;
GS_EXPORT NSString * const NSMetadataItemDisplayNameKey;
GS_EXPORT NSString * const NSMetadataItemURLKey;
GS_EXPORT NSString * const NSMetadataItemPathKey;
GS_EXPORT NSString * const NSMetadataItemFSSizeKey;
GS_EXPORT NSString * const NSMetadataItemFSCreationDateKey;
GS_EXPORT NSString * const NSMetadataItemFSContentChangeDateKey;

@interface NSMetadataItem : NSObject
{
#if	GS_EXPOSE(NSMetadataItem)
@private
  void  *_NSMetadataItemInternal;	/** Private internal data */
#endif
}

- (NSArray *) attributes;
- (id) valueForAttribute: (NSString *)key;
- (NSDictionary *) valuesForAttributes: (NSArray *)keys;
@end

// Metdata Query Constants...
GS_EXPORT NSString * const NSMetadataQueryUserHomeScope;
GS_EXPORT NSString * const NSMetadataQueryLocalComputerScope;
GS_EXPORT NSString * const NSMetadataQueryNetworkScope;
GS_EXPORT NSString * const NSMetadataQueryUbiquitousDocumentsScope;
GS_EXPORT NSString * const NSMetadataQueryUbiquitousDataScope;

GS_EXPORT NSString * const NSMetadataQueryDidFinishGatheringNotification;
GS_EXPORT NSString * const NSMetadataQueryDidStartGatheringNotification;
GS_EXPORT NSString * const NSMetadataQueryDidUpdateNotification;
GS_EXPORT NSString * const NSMetadataQueryGatheringProgressNotification;

/* Abstract interface for metadata query... */
@interface NSMetadataQuery : NSObject
{
#if	GS_EXPOSE(NSMetadataQuery)
@private
  void	*_NSMetadataQueryInternal;	/** Private internal data */
#endif
}

/* Instance methods */
- (id) valueOfAttribute: (id)attr forResultAtIndex: (NSUInteger)index;
- (NSArray *) groupedResults;
- (NSDictionary *) valueLists;
- (NSUInteger) indexOfResult: (id)result;
- (NSArray *) results;
- (id) resultAtIndex: (NSUInteger)index;
- (NSUInteger) resultCount;

// Enable/Disable updates
- (void) enableUpdates;
- (void) disableUpdates;

// Status of the query...
- (BOOL) isStopped;
- (BOOL) isGathering;
- (BOOL) isStarted;
- (void) stopQuery;
- (BOOL) startQuery;

// Search URLS
- (void) setSearchItemURLs: (NSArray *)urls;
- (NSArray *) searchItemURLs;

// Search scopes 
- (void) setSearchScopes: (NSArray *)scopes;
- (NSArray *) searchScopes;

// Notification interval
- (void) setNotificationBatchingInterval: (NSTimeInterval)interval;
- (NSTimeInterval) notificationBatchingInterval;

// Grouping Attributes.
- (void) setGroupingAttributes: (NSArray *)attrs;
- (NSArray *) groupingAttributes;
- (void) setValueListAttributes: (NSArray *)attrs;
- (NSArray *) valueListAttributes;

// Sort descriptors
- (void) setSortDescriptors: (NSArray *)attrs;
- (NSArray *) sortDescriptors;

// Predicate
- (void) setPredicate: (NSPredicate *)predicate;
- (NSPredicate *) predicate;

// Delegate
- (void) setDelegate: (id<NSMetadataQueryDelegate>)delegate;
- (id<NSMetadataQueryDelegate>) delegate;

@end

@protocol NSMetadataQueryDelegate
#if OS_API_VERSION(MAC_OS_X_VERSION_10_6,GS_API_LATEST) && GS_PROTOCOLS_HAVE_OPTIONAL
@optional
#else
@end
@interface NSObject (NSMetadataQueryDelegate)
#endif // GS_PROTOCOLS_HAVE_OPTIONAL
- (id) metadataQuery: (NSMetadataQuery *)query
  replacementObjectForResultObject: (NSMetadataItem *)result;
- (id) metadataQuery: (NSMetadataQuery *)query
  replacementValueForAttribute: (NSString *)attribute
  value: (id)attributeValue;
@end

@interface NSMetadataQueryAttributeValueTuple : NSObject
{
#if	GS_EXPOSE(NSMetadataQueryAttributeValueTuple)
@private
  /** Private internal data */
  void  *_NSMetadataQueryAttributeValueTupleInternal;
#endif
}

- (NSString *) attribute;
- (id) value;
- (NSUInteger) count;

@end

@interface NSMetadataQueryResultGroup : NSObject
{
#if	GS_EXPOSE(NSMetadataQueryResultGroup)
@private
  void	*_NSMetadataQueryResultGroupInternal;	/** Private internal data */
#endif
}

- (NSString *) attribute;
- (id) value;
- (NSArray *) subgroups;
- (NSUInteger) resultCount;
- (id) resultAtIndex: (NSUInteger)index;
- (NSArray *) results;

@end

#endif