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|
#
#
# Base class for custodian alerters.
#
# Each subclass will register themselves, via the call
# to 'register_alert_type'.
#
# This class is a factory that will return the correct
# derived class.
#
#
module Custodian
class AlertFactory
#
# The subclasses we have.
#
@@subclasses = { }
#
# Create an alerter object, based upon the type
#
def self.create( alert_type, obj )
c = @@subclasses[alert_type]
if c
c.new( obj )
else
raise ArgumentError, "Bad alert type: '#{alert_type}'"
end
end
#
# Register a new test type - this must be called by our derived classes
#
def self.register_alert_type name
@@subclasses[name] = self
end
#
# Return an array of test-types we know about
#
# i.e. Derived classes that have registered themselves.
#
#
def self.known_alerters
@@subclasses
end
def raise
raise NoMethod, "This should be implemented in a derived class"
end
def clear
raise NoMethod, "This should be implemented in a derived class"
end
end
end
|
