Transition.py revision 9104:27d56b644e78 
1# Copyright (c) 1999-2008 Mark D. Hill and David A. Wood
2# Copyright (c) 2009 The Hewlett-Packard Development Company
3# All rights reserved.
4#
5# Redistribution and use in source and binary forms, with or without
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9# redistributions in binary form must reproduce the above copyright
10# notice, this list of conditions and the following disclaimer in the
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12# neither the name of the copyright holders nor the names of its
13# contributors may be used to endorse or promote products derived from
14# this software without specific prior written permission.
15#
16# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
17# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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27
28from slicc.symbols.Symbol import Symbol
29
30class Transition(Symbol):
31    def __init__(self, table, machine, state, event, nextState, actions,
32                 request_types, location, pairs):
33        ident = "%s|%s" % (state, event)
34        super(Transition, self).__init__(table, ident, location, pairs)
35
36        self.state = machine.states[state]
37        self.event = machine.events[event]
38        self.nextState = machine.states[nextState]
39        self.actions = [ machine.actions[a] for a in actions ]
40        self.request_types = [ machine.request_types[s] for s in request_types ]
41        self.resources = {}
42
43        for action in self.actions:
44            for var,value in action.resources.iteritems():
45                if var.type.ident != "DNUCAStopTable":
46                    num = int(value)
47                    if var in self.resources:
48                        num += int(value)
49                    self.resources[var] = str(num)
50                else:
51                    self.resources[var] = value
52
53    def __repr__(self):
54      return "[Transition: (%r, %r) -> %r, %r]" % \
55             (self.state, self.event, self.nextState, self.actions)
56
57    def getActionShorthands(self):
58        assert self.actions
59
60        return ''.join(a.short for a in self.actions)
61
62__all__ = [ "Transition" ]
63