#
#--
# Copyright (c) 2006, John Mettraux, OpenWFE.org
# All rights reserved.
# 
# Redistribution and use in source and binary forms, with or without 
# modification, are permitted provided that the following conditions are met:
# 
# . Redistributions of source code must retain the above copyright notice, this
#   list of conditions and the following disclaimer.  
# 
# . Redistributions in binary form must reproduce the above copyright notice, 
#   this list of conditions and the following disclaimer in the documentation 
#   and/or other materials provided with the distribution.
# 
# . Neither the name of the "OpenWFE" nor the names of its contributors may be
#   used to endorse or promote products derived from this software without
#   specific prior written permission.
# 
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 
# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 
# ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE 
# LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 
# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 
# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 
# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 
# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 
# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 
# POSSIBILITY OF SUCH DAMAGE.
#++
#
# $Id: definitions.rb 2725 2006-06-02 13:26:32Z jmettraux $
#

#
# "made in Japan"
#
# John Mettraux at openwfe.org
#

require 'ru/service'
require 'ru/fe_define'
require 'ru/fe_base'
require 'ru/fe_misc'
require 'ru/fe_value'
require 'ru/fe_subprocess'
require 'ru/fe_concurrence'
require 'ru/fe_participant'
require 'ru/fe_time'


module OpenWFEru

    #
    # The mapping between expression names like 'sequence', 'participant', etc
    # and classes like 'ParticipantExpression', 'SequenceExpression', etc.
    #
    class ExpressionMap < Service

        #attr_accessor \
        #    :applicationContext

        SYNC_PREFIX = "sync::"

        def initialize (serviceName, applicationContext)
            super(serviceName, applicationContext)

            @map = {}

            @map["process-definition"] = DefineExpression
            @map["workflow-definition"] = DefineExpression
            @map["define"] = DefineExpression

            @map["sequence"] = SequenceExpression
            @map["participant"] = ParticipantExpression

            @map["concurrence"] = ConcurrenceExpression
            @map["#{SYNC_PREFIX}generic"] = GenericSyncExpression

            @map["subprocess"] = SubprocessRefExpression

            @map["set"] = SetValueExpression
            @map["unset"] = UnsetValueExpression

            @map["if"] = IfExpression
            @map["equals"] = EqualsExpression

            @map["sleep"] = SleepExpression
            @map["cron"] = CronExpression

            @map["reval"] = RevalExpression
            @map["print"] = PrintExpression

            @map["lose"] = LoseExpression
            @map["forget"] = ForgetExpression
        end

        #
        # Returns the expression class corresponding to the given 
        # expression name
        #
        def get_class (expressionname)
            return @map[expressionname]
        end

        def get_sync_class (expressionname)
            return @map["#{SYNC_PREFIX}#{expressionname}"]
        end

        #
        # Returns true if the given expression name ('sequence', 
        # 'process-definition', ...) is a DefineExpression.
        #
        def is_definition? (expressionname)
            c = get_class(expressionname)
            return \
                (c == OpenWFEru::DefineExpression or
                 c == OpenWFEru::SetValueExpression)
        end

    end

end