35 lines
902 B
Python
35 lines
902 B
Python
from objc import _objc
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__all__ = ["protocolNamed", "ProtocolError"]
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class ProtocolError(_objc.error):
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__module__ = "objc"
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PROTOCOL_CACHE = {}
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def protocolNamed(name):
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"""
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Returns a Protocol object for the named protocol. This is the
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equivalent of @protocol(name) in Objective-C.
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Raises objc.ProtocolError when the protocol does not exist.
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"""
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try:
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return PROTOCOL_CACHE[name]
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except KeyError:
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pass
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for p in _objc.protocolsForProcess():
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pname = p.__name__
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PROTOCOL_CACHE.setdefault(pname, p)
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if pname == name:
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return p
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for cls in _objc.getClassList(True):
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for p in _objc.protocolsForClass(cls):
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pname = p.__name__
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PROTOCOL_CACHE.setdefault(pname, p)
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if pname == name:
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return p
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raise ProtocolError(f"protocol {name!r} does not exist", name)
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