source: vbox/trunk/src/libs/xpcom18a4/python/server/factory.py@ 27325

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# The Original Code is the Python XPCOM language bindings.
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#        Mark Hammond <[email protected]> (original author)
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# Class factory
#
# Hardly worth its own source file!
import xpcom
from xpcom import components, nsError, _xpcom, logger

class Factory:
    _com_interfaces_ = components.interfaces.nsIFactory
    # This will only ever be constructed via other Python code,
    # so we can have ctor args.
    def __init__(self, klass):
        self.klass = klass

    def createInstance(self, outer, iid):
        if outer is not None:
            raise xpcom.ServerException(nsError.NS_ERROR_NO_AGGREGATION)

        logger.debug("Python Factory creating %s", self.klass.__name__)
        try:
            return self.klass()
        except:
            # An exception here may not be obvious to the user - none
            # of their code has been called yet.  It can be handy on
            # failure to tell the user what class failed!
            logger.error("Creation of class '%r' failed!\nException details follow\n",
                           self.klass)
            # The framework itself will also report the error.
            raise

    def lockServer(self, lock):
        logger.debug("Python Factory LockServer called '%s'", lock)