Ryan Joseph created THRIFT-3325:
-----------------------------------
Summary: Extended services aren't subclasses in generated Cocoa
Key: THRIFT-3325
URL: https://issues.apache.org/jira/browse/THRIFT-3325
Project: Thrift
Issue Type: Bug
Reporter: Ryan Joseph
Priority: Critical
The following IDL:
{noformat}
service Parent {
string name();
}
service Child extends Parent {
i32 age();
}
{noformat}
Produces the following generated Cocoa (truncated for readability):
{noformat}
@protocol Parent <NSObject>
- (NSString *) name; // throws TException
@end
// ...
@protocol Child <NSObject>
- (int32_t) age; // throws TException
@end
@interface ChildClient : NSObject <Child> {
id <TProtocol> inProtocol;
id <TProtocol> outProtocol;
}
- (id) initWithProtocol: (id <TProtocol>) protocol;
- (id) initWithInProtocol: (id <TProtocol>) inProtocol outProtocol: (id
<TProtocol>) outProtocol;
@end
{noformat}
With these definitions, an instance of "Child" knows nothing of nor can ever
have superclass method {{name()}} called on it. This completely breaks not only
polymorphism, but the use of the "extends" keyword when generating Cocoa.
This could be easily resolved by simply having the "Child" class also conform
to the "Parent" protocol, or more-correctly resolved by making "Child" an
actual subclass of "Parent".
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