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
6# modification, are permitted provided that the following conditions are
7# met: redistributions of source code must retain the above copyright
8# notice, this list of conditions and the following disclaimer;
9# redistributions in binary form must reproduce the above copyright
10# notice, this list of conditions and the following disclaimer in the
11# documentation and/or other materials provided with the distribution;
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.ast.DeclAST import DeclAST
29from slicc.symbols import Transition
30
31class TransitionDeclAST(DeclAST):
32    def __init__(self, slicc, request_types, states, events, next_state,
33                 actions):
34        super(TransitionDeclAST, self).__init__(slicc)
35
36        self.request_types = request_types
37        self.states = states
38        self.events = events
39        self.next_state = next_state
40        self.actions = actions
41
42    def __repr__(self):
43        return "[TransitionDecl: ]"
44
45    def generate(self):
46        machine = self.symtab.state_machine
47
48        if machine is None:
49            self.error("Transition declaration not part of a machine.")
50
51        for action in self.actions:
52            if action not in machine.actions:
53                self.error("Invalid action: %s is not part of machine: %s" % \
54                           (action, machine))
55
56        for request_type in self.request_types:
57            if request_type not in machine.request_types:
58                self.error("Invalid protocol access type: " \
59                           "%s is not part of machine: %s" % \
60                           (request_type, machine))
61
62        for state in self.states:
63            if state not in machine.states:
64                self.error("Invalid state: %s is not part of machine: %s" % \
65                           (state, machine))
66            next_state = self.next_state or state
67            for event in self.events:
68                if event not in machine.events:
69                    self.error("Invalid event: %s is not part of machine: %s" % \
70                               (event, machine))
71                t = Transition(self.symtab, machine, state, event, next_state,
72                               self.actions, self.request_types, self.location)
73                machine.addTransition(t)
74