L4E_PRIORITY_RANGE_FILTER Contracts



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	description: "Filter matching on a range of priorities."
	project: "Project Goanna <http://sourceforge.net/projects/goanna>"
	library: "log4e"
	date: "$Date$"
	revision: "$Revision$"
	author: "Glenn Maughan <glennmaughan@goanna.info>"
	copyright: "Copyright (c) 2002 Glenn Maughan"
	license: "Eiffel Forum License v1 (see forum.txt)."

class interface
	L4E_PRIORITY_RANGE_FILTER

create 
	make

feature -- Initialization

	make (min_priority, max_priority: L4E_PRIORITY; match_on_filter: BOOLEAN)
			-- Create filter to match 'priority'. The decision is based on
			-- the following decisions:
			--
			-- If the priority is outside the range (inclusive) then Filter_reject is returned.
			-- If the priority is within the range and 'match_on_filter' is True then
			-- Filter_accept is returned.
			-- If the priority is within the range and 'match_on_filter' if False then
			-- Filter_neutral is returned.
			--
			-- Passing Void for 'min_priority' effectively sets no minimum range.
			-- Passing Void for 'max_priority' effectively sets no maximum range.
		require
			range_specified: min_priority /= void or max_priority /= void
			range_valid: min_priority /= void and max_priority /= void implies min_priority < max_priority
	
feature -- Status report

	decide (event: L4E_EVENT): INTEGER
			-- Should 'event' be logged. Return one of Filter_accept,
			-- Filter_reject, or Filter_neutral.
	
end -- class L4E_PRIORITY_RANGE_FILTER

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