1  /* Copyright (c) 2008 Dan Knapp
  2  
  3  Permission is hereby granted, free of charge, to any person obtaining a copy of
  4  this software and associated documentation files (the "Software"), to deal in
  5  the Software without restriction, including without limitation the rights to
  6  use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
  7  the Software, and to permit persons to whom the Software is furnished to do so,
  8  subject to the following conditions:
  9  
 10  The above copyright notice and this permission notice shall be included in all
 11  copies or substantial portions of the Software.
 12  
 13  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 14  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
 15  FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
 16  COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
 17  IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 18  CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
 19  #import <CoreData/NSEntityDescription.h>
 20  #import <CoreData/NSRelationshipDescription.h>
 21  #import <Foundation/NSKeyedUnarchiver.h>
 22  
 23  @implementation NSRelationshipDescription
 24  
 25  - initWithCoder: (NSCoder *) coder {
 26      if (![coder allowsKeyedCoding])
 27          [NSException raise: NSInvalidArgumentException
 28                      format: @"%@ can not initWithCoder:%@", [self class],
 29                              [coder class]];
 30  
 31      [super initWithCoder: coder];
 32  
 33      _deleteRule = [coder decodeIntForKey: @"NSDeleteRule"];
 34      _destinationEntity = [coder decodeObjectForKey: @"NSDestinationEntity"];
 35      _inverseRelationship = [coder decodeObjectForKey: @"NSInverseRelationship"];
 36      _optional = [coder decodeBoolForKey: @"NSIsOptional"];
 37      _maxCount = [coder decodeIntForKey: @"NSMaxCount"];
 38      _minCount = [coder decodeIntForKey: @"NSMinCount"];
 39  
 40      _destinationEntityName =
 41              [coder decodeObjectForKey: @"_NSDestinationEntityName"];
 42      _inverseRelationshipName =
 43              [coder decodeObjectForKey: @"_NSInverseRelationshipName"];
 44  
 45      return self;
 46  }
 47  
 48  - (NSString *) description {
 49      return [NSString stringWithFormat: @"<NSRelationshipDescription: %@->%@>",
 50                                         _propertyName, _destinationEntityName];
 51  }
 52  
 53  - (BOOL) isToMany {
 54      return (_minCount == 1 && _maxCount == 1) ? NO : YES;
 55  }
 56  
 57  - (int) maxCount {
 58      return _maxCount;
 59  }
 60  
 61  - (int) minCount {
 62      return _minCount;
 63  }
 64  
 65  - (NSDeleteRule) deleteRule {
 66      return _deleteRule;
 67  }
 68  
 69  - (NSEntityDescription *) destinationEntity {
 70      return _destinationEntity;
 71  }
 72  
 73  - (NSRelationshipDescription *) inverseRelationship {
 74      return _inverseRelationship;
 75  }
 76  
 77  - (void) setMaxCount: (int) value {
 78      if ([_entity _hasBeenInstantiated]) {
 79          NSLog(@"Attempt to modify entity after instantiating it.");
 80          return;
 81      }
 82  
 83      _maxCount = value;
 84  }
 85  
 86  - (void) setMinCount: (int) value {
 87      if ([_entity _hasBeenInstantiated]) {
 88          NSLog(@"Attempt to modify entity after instantiating it.");
 89          return;
 90      }
 91  
 92      _minCount = value;
 93  }
 94  
 95  - (void) setDeleteRule: (NSDeleteRule) value {
 96      if ([_entity _hasBeenInstantiated]) {
 97          NSLog(@"Attempt to modify entity after instantiating it.");
 98          return;
 99      }
100  
101      _deleteRule = value;
102  }
103  
104  - (void) setDestinationEntity: (NSEntityDescription *) value {
105      if ([_entity _hasBeenInstantiated]) {
106          NSLog(@"Attempt to modify entity after instantiating it.");
107          return;
108      }
109  
110      _destinationEntity = value;
111      _destinationEntityName = [value name];
112  }
113  
114  - (void) setInverseRelationship: (NSRelationshipDescription *) value {
115      if ([_entity _hasBeenInstantiated]) {
116          NSLog(@"Attempt to modify entity after instantiating it.");
117          return;
118      }
119  
120      _inverseRelationship = value;
121      _inverseRelationshipName = [value name];
122  }
123  
124  @end