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Up to [NeXTSTEP 3.3 examples] / Examples / EnterpriseObjects / Validation / Validation.subproj

Annotation of Examples/EnterpriseObjects/Validation/Validation.subproj/KeyValueValidation.m, revision 1.1.1.1

1.1       root        1: #import "KeyValueValidation.h"
                      2: 
                      3: static NSDictionary *validateValuesInDictionary(id object, NSDictionary *values)
                      4: {
                      5:     NSEnumerator *editEnum = [values keyEnumerator];
                      6:     NSMutableDictionary *errorDict = nil;
                      7:     NSString *key;
                      8: 
                      9:     while (key = [editEnum nextObject]) {
                     10:         // construct a selector and see if the have a validation method
                     11:         id value = [values objectForKey:key];
                     12:         NSString *methodName = [NSString stringWithFormat:@"validate%@:", [key capitalizedString]];
                     13:         SEL selector = sel_getUid([methodName cString]);
                     14:         NSString *errorMessage = nil;
                     15: 
                     16:         if (selector && [object respondsToSelector:selector]) {
                     17:             errorMessage = [object perform:selector withObject:value];
                     18:             if (errorMessage) {
                     19:                 if (!errorDict)
                     20:                     errorDict = [NSMutableDictionary dictionary];
                     21:                 [errorDict setObject:errorMessage forKey:key];
                     22:             }
                     23:         }
                     24:     }
                     25:     return errorDict;
                     26: }
                     27: 
                     28: @implementation NSObject (KeyValueValidation)
                     29: - (NSDictionary *)validateValuesInDictionary:(NSDictionary *)values
                     30: {
                     31:     return validateValuesInDictionary(self, values);
                     32: }
                     33: @end
                     34: 

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