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//
// QKAttribute.m
// QueryKit
//
// Created by Kyle Fuller on 30/04/2013.
//
//
#import "QKAttribute.h"
@implementation QKAttribute
#pragma mark - NSCoding
+ (BOOL)supportsSecureCoding {
return YES;
}
- (void)encodeWithCoder:(NSCoder *)encoder {
[encoder encodeObject:self.name forKey:@"name"];
}
- (instancetype)initWithCoder:(NSCoder *)decoder {
NSString *name = [decoder decodeObjectOfClass:[NSString class] forKey:@"name"];
return [self initWithName:name];
}
#pragma mark - NSCopying
- (instancetype)copyWithZone:(NSZone *)zone {
NSString *name = [self.name copyWithZone:zone];
return [[[self class] alloc] initWithName:name];
}
#pragma mark -
- (instancetype)initWithAttributes:(QKAttribute *)attribute, ... {
NSParameterAssert(attribute != nil);
NSMutableArray *attributes = [NSMutableArray arrayWithObject:attribute.name];
va_list attributeList;
va_start(attributeList, attribute);
while ((attribute = va_arg(attributeList, id))) {
[attributes addObject:attribute.name];
}
va_end(attributeList);
NSString *name = [attributes componentsJoinedByString:@"."];
if (self = [super init]) {
_name = name;
}
return self;
}
- (instancetype)initWithName:(NSString *)name {
if (self = [super init]) {
_name = name;
}
return self;
}
- (NSExpression *)expression {
return [NSExpression expressionForKeyPath:self.name];
}
#pragma mark - Equality
- (NSUInteger)hash {
return [self.name hash];
}
- (BOOL)isEqualToAttribute:(QKAttribute *)attribute {
return [self.name isEqualToString:attribute.name];
}
- (BOOL)isEqual:(id)object {
return object == self || ([object isKindOfClass:[QKAttribute class]] && [self isEqualToAttribute:object]);
}
#pragma mark -
// The following methods are implemented so that `[NSPredicate predicateWithFormat:@"%K", attribute]` will work
- (NSString *)description {
return self.name;
}
- (NSRange)rangeOfString:(NSString *)aString {
return [self.name rangeOfString:aString];
}
- (NSArray *)componentsSeparatedByString:(NSString *)separator {
return [self.name componentsSeparatedByString:separator];
}
- (NSUInteger)length {
return [self.name length];
}
#pragma mark - Comparison
- (NSPredicate *)predicateWithRightExpression:(NSExpression *)expression
modifier:(NSComparisonPredicateModifier)modifier
type:(NSPredicateOperatorType)type
options:(NSComparisonPredicateOptions)options
{
NSExpression *leftExpression = [self expression];
return [NSComparisonPredicate predicateWithLeftExpression:leftExpression
rightExpression:expression
modifier:modifier
type:type
options:options];
}
@end
@implementation QKAttribute (Predicate)
- (NSPredicate *)equal:(id)value options:(NSComparisonPredicateOptions)options {
NSExpression *expression = [NSExpression expressionForConstantValue:value];
return [self predicateWithRightExpression:expression
modifier:NSDirectPredicateModifier
type:NSEqualToPredicateOperatorType
options:options];
}
- (NSPredicate *)equal:(id)value {
return [self equal:value options:0];
}
- (NSPredicate *)notEqual:(id)value options:(NSComparisonPredicateOptions)options {
NSExpression *expression = [NSExpression expressionForConstantValue:value];
return [self predicateWithRightExpression:expression
modifier:NSDirectPredicateModifier
type:NSNotEqualToPredicateOperatorType
options:options];
}
- (NSPredicate *)notEqual:(id)value {
return [self notEqual:value options:0];
}
- (NSPredicate *)beginsWith:(id)value options:(NSComparisonPredicateOptions)options {
NSExpression *expression = [NSExpression expressionForConstantValue:value];
return [self predicateWithRightExpression:expression
modifier:NSDirectPredicateModifier
type:NSBeginsWithPredicateOperatorType
options:options];
}
- (NSPredicate *)beginsWith:(id)value {
return [self beginsWith:value options:0];
}
- (NSPredicate *)endsWith:(id)value options:(NSComparisonPredicateOptions)options {
NSExpression *expression = [NSExpression expressionForConstantValue:value];
return [self predicateWithRightExpression:expression
modifier:NSDirectPredicateModifier
type:NSEndsWithPredicateOperatorType
options:options];
}
- (NSPredicate *)endsWith:(id)value {
return [self endsWith:value options:0];
}
- (NSPredicate *)like:(id)value options:(NSComparisonPredicateOptions)options {
NSExpression *expression = [NSExpression expressionForConstantValue:value];
return [self predicateWithRightExpression:expression
modifier:NSDirectPredicateModifier
type:NSLikePredicateOperatorType
options:options];
}
- (NSPredicate *)like:(id)value {
return [self like:value options:0];
}
- (NSPredicate *)matches:(id)value options:(NSComparisonPredicateOptions)options {
NSExpression *expression = [NSExpression expressionForConstantValue:value];
return [self predicateWithRightExpression:expression
modifier:NSDirectPredicateModifier
type:NSMatchesPredicateOperatorType
options:options];
}
- (NSPredicate *)matches:(id)value {
return [self matches:value options:0];
}
- (NSPredicate *)greaterThan:(id)value {
NSExpression *expression = [NSExpression expressionForConstantValue:value];
return [self predicateWithRightExpression:expression
modifier:NSDirectPredicateModifier
type:NSGreaterThanPredicateOperatorType
options:0];
}
- (NSPredicate *)greaterThanOrEqualTo:(id)value {
NSExpression *expression = [NSExpression expressionForConstantValue:value];
return [self predicateWithRightExpression:expression
modifier:NSDirectPredicateModifier
type:NSGreaterThanOrEqualToPredicateOperatorType
options:0];
}
- (NSPredicate *)lessThan:(id)value {
NSExpression *expression = [NSExpression expressionForConstantValue:value];
return [self predicateWithRightExpression:expression
modifier:NSDirectPredicateModifier
type:NSLessThanPredicateOperatorType
options:0];
}
- (NSPredicate *)lessThanOrEqualTo:(id)value {
NSExpression *expression = [NSExpression expressionForConstantValue:value];
return [self predicateWithRightExpression:expression
modifier:NSDirectPredicateModifier
type:NSLessThanOrEqualToPredicateOperatorType
options:0];
}
- (NSPredicate *)isNil {
NSExpression *expression = [NSExpression expressionForConstantValue:nil];
return [self predicateWithRightExpression:expression
modifier:NSDirectPredicateModifier
type:NSEqualToPredicateOperatorType
options:0];
}
- (NSPredicate *)between:(id)minimumValue and:(id)maxiumValue {
NSParameterAssert(minimumValue != nil);
NSParameterAssert(maxiumValue != nil);
NSExpression *expression = [NSExpression expressionForConstantValue:@[minimumValue, maxiumValue]];
return [self predicateWithRightExpression:expression
modifier:NSDirectPredicateModifier
type:NSBetweenPredicateOperatorType
options:0];
}
- (NSPredicate *)in:(id<NSFastEnumeration>)set {
NSParameterAssert(set != nil);
NSExpression *expression = [NSExpression expressionForConstantValue:set];
return [self predicateWithRightExpression:expression
modifier:NSDirectPredicateModifier
type:NSInPredicateOperatorType
options:0];
}
- (NSPredicate *)contains:(id)value options:(NSComparisonPredicateOptions)options {
NSParameterAssert(value != nil);
NSExpression *expression = [NSExpression expressionForConstantValue:value];
return [self predicateWithRightExpression:expression
modifier:NSDirectPredicateModifier
type:NSContainsPredicateOperatorType
options:options];
}
- (NSPredicate *)contains:(id)value {
return [self contains:value options:0];
}
- (NSPredicate *)isYes {
NSExpression *expression = [NSExpression expressionForConstantValue:@YES];
return [self predicateWithRightExpression:expression
modifier:NSDirectPredicateModifier
type:NSEqualToPredicateOperatorType
options:0];
}
- (NSPredicate *)isNo {
NSExpression *expression = [NSExpression expressionForConstantValue:@NO];
return [self predicateWithRightExpression:expression
modifier:NSDirectPredicateModifier
type:NSEqualToPredicateOperatorType
options:0];
}
@end
@implementation QKAttribute (Sorting)
- (NSSortDescriptor *)ascending {
return [[NSSortDescriptor alloc] initWithKey:self.name ascending:YES];
}
- (NSSortDescriptor *)descending {
return [[NSSortDescriptor alloc] initWithKey:self.name ascending:NO];
}
@end