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ObjectionFunctions.m
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ObjectionFunctions.m
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#import <objc/runtime.h>
#import "ObjectionFunctions.h"
static NSString *const ObjectionException = @"ObjectionException";
ObjectionPropertyInfo ObjectionFindClassOrProtocolForProperty(objc_property_t property) {
NSString *attributes = [NSString stringWithCString: property_getAttributes(property) encoding: NSASCIIStringEncoding];
NSString *propertyName = [NSString stringWithCString:property_getName(property) encoding:NSASCIIStringEncoding];
NSRange startRange = [attributes rangeOfString:@"T@\""];
if (startRange.location == NSNotFound) {
@throw [NSException exceptionWithName:ObjectionException reason:[NSString stringWithFormat:@"Unable to determine class type for property declaration: '%@'", propertyName] userInfo:nil];
}
NSString *startOfClassName = [attributes substringFromIndex:startRange.length];
NSRange endRange = [startOfClassName rangeOfString:@"\""];
if (endRange.location == NSNotFound) {
@throw [NSException exceptionWithName:ObjectionException reason:[NSString stringWithFormat:@"Unable to determine class type for property declaration: '%@'", propertyName] userInfo:nil];
}
NSString *classOrProtocolName = [startOfClassName substringToIndex:endRange.location];
id classOrProtocol = nil;
ObjectionPropertyInfo propertyInfo;
if ([classOrProtocolName hasPrefix:@"<"] && [classOrProtocolName hasSuffix:@">"]) {
classOrProtocolName = [classOrProtocolName stringByReplacingOccurrencesOfString:@"<" withString:@""];
classOrProtocolName = [classOrProtocolName stringByReplacingOccurrencesOfString:@">" withString:@""];
classOrProtocol = objc_getProtocol([classOrProtocolName UTF8String]);
propertyInfo.type = ObjectionTypeProtocol;
} else {
classOrProtocol = NSClassFromString(classOrProtocolName);
propertyInfo.type = ObjectionTypeClass;
}
if(!classOrProtocol) {
@throw [NSException exceptionWithName:ObjectionException reason:[NSString stringWithFormat:@"Unable get class for name '%@' for property '%@'", classOrProtocolName, propertyName] userInfo:nil];
}
propertyInfo.object = classOrProtocol;
return propertyInfo;
}
NSSet* ObjectionBuildDependenciesForClass(Class klass, NSSet *requirements) {
Class superClass = class_getSuperclass([klass class]);
if([superClass respondsToSelector:@selector(objectionRequires)]) {
NSSet *parentsRequirements = [superClass performSelector:@selector(objectionRequires)];
NSMutableSet *dependencies = [NSMutableSet setWithSet:parentsRequirements];
[dependencies unionSet:requirements];
requirements = dependencies;
}
return requirements;
}
objc_property_t ObjectionGetProperty(Class klass, NSString *propertyName) {
objc_property_t property = class_getProperty(klass, (const char *)[propertyName UTF8String]);
if (property == NULL) {
@throw [NSException exceptionWithName:ObjectionException reason:[NSString stringWithFormat:@"Unable to find property declaration: '%@'", propertyName] userInfo:nil];
}
return property;
}