note
	component:   "openEHR common libraries"
	description: "Abstract model of any visitable object"
	keywords:    "Serialisation"
	author:      "thomas.beale@oceaninformatics.com"
	support:     "http://www.openehr.org/issues/browse/AWB"
	copyright:   "Copyright (c) 2010 openEHR Foundation <http://www.openEHR.org>"
	license:     "See notice at bottom of class"

	file:        "$URL: https://svn.origo.ethz.ch/abel/trunk/libraries/openehr/src/serialisation/visitable.e $"
	revision:    "$LastChangedRevision$"
	last_change: "$LastChangedDate$"

deferred class VISITABLE

feature -- Visitor

	enter_subtree(visitor: ANY; depth: INTEGER)
			-- perform action at start of block for this node
		require
			Visitor_exists: visitor /= Void
			Depth_valid: depth >= 0
		deferred
		end

	exit_subtree(visitor: ANY; depth: INTEGER)
			-- perform action at end of block for this node
		require
			Visitor_exists: visitor /= Void
			Depth_valid: depth >= 0
		deferred
		end

end


--|
--| ***** BEGIN LICENSE BLOCK *****
--| Version: MPL 1.1/GPL 2.0/LGPL 2.1
--|
--| The contents of this file are subject to the Mozilla Public License Version
--| 1.1 (the 'License'); you may not use this file except in compliance with
--| the License. You may obtain a copy of the License at
--| http://www.mozilla.org/MPL/
--|
--| Software distributed under the License is distributed on an 'AS IS' basis,
--| WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
--| for the specific language governing rights and limitations under the
--| License.
--|
--| The Original Code is visitable.e.
--|
--| The Initial Developer of the Original Code is Thomas Beale.
--| Portions created by the Initial Developer are Copyright (C) 2003-2010
--| the Initial Developer. All Rights Reserved.
--|
--| Contributor(s):
--|
--| Alternatively, the contents of this file may be used under the terms of
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--| the provisions above, a recipient may use your version of this file under
--| the terms of any one of the MPL, the GPL or the LGPL.
--|
--| ***** END LICENSE BLOCK *****
--|