summaryrefslogtreecommitdiff
path: root/amqp_codegen.py
blob: c4a38461bdb0c727e43d2aed0efe9586a2d315fa (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
##   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 RabbitMQ.
##
##   The Initial Developers of the Original Code are LShift Ltd.,
##   Cohesive Financial Technologies LLC., and Rabbit Technologies Ltd.
##
##   Portions created by LShift Ltd., Cohesive Financial Technologies
##   LLC., and Rabbit Technologies Ltd. are Copyright (C) 2007-2008
##   LShift Ltd., Cohesive Financial Technologies LLC., and Rabbit
##   Technologies Ltd.;
##
##   All Rights Reserved.
##
##   Contributor(s): ______________________________________.
##

from __future__ import nested_scopes
import re
import sys

try:
    try:
        import simplejson as json
    except ImportError, e:
        if sys.hexversion >= 0x20600f0:
            import json
        else:
            raise e
except ImportError:
    print >> sys.stderr , " You don't appear to have simplejson.py installed"
    print >> sys.stderr , " (an implementation of a JSON reader and writer in Python)."
    print >> sys.stderr , " You can install it:"
    print >> sys.stderr , "   - by running 'apt-get install python-simplejson' on Debian-based systems,"
    print >> sys.stderr , "   - by running 'yum install python-simplejson' on Fedora/Red Hat system,"
    print >> sys.stderr , "   - from sources from 'http://pypi.python.org/pypi/simplejson'"
    print >> sys.stderr , "   - simplejson is a standard json library in the Python core since 2.6"
    sys.exit(1)

def insert_base_types(d):
    for t in ['octet', 'shortstr', 'longstr', 'short', 'long',
              'longlong', 'bit', 'table', 'timestamp']:
        d[t] = t
        
class AmqpSpec:
    def __init__(self, filename):
        self.spec = json.load(file(filename))

        self.major = self.spec['major-version']
        self.minor = self.spec['minor-version']
        self.port =  self.spec['port']

        self.domains = {}
        insert_base_types(self.domains)
        for entry in self.spec['domains']:
            self.domains[ entry[0] ] = entry[1]

        self.constants = []
        for d in self.spec['constants']:
            if d.has_key('class'):
                klass = d['class']
            else:
                klass = ''
            self.constants.append((d['name'], d['value'], klass))

        self.classes = []
        for element in self.spec['classes']:
            self.classes.append(AmqpClass(self.spec, element))
        
    def allClasses(self):
        return self.classes
    
    def allMethods(self):
        return [m for c in self.classes for m in c.allMethods()]

    def resolveDomain(self, n):
        return self.domains[n]

class AmqpEntity:
    def __init__(self, element):
        self.element = element
        self.name = element['name']
    
class AmqpClass(AmqpEntity):
    def __init__(self, spec, element):
        AmqpEntity.__init__(self, element)
        self.spec = spec
        self.index = int(self.element['id'])

        self.methods = []
        for method_element in self.element['methods']:
            self.methods.append(AmqpMethod(self, method_element))

        self.hasContentProperties = False
        for method in self.methods:
            if method.hasContent:
                self.hasContentProperties = True
                break

        self.fields = []
        if self.element.has_key('properties'):
            index = 0
            for e in self.element['properties']:
                self.fields.append(AmqpField(self, e, index))
                index = index + 1
            
    def allMethods(self):
        return self.methods

    def __repr__(self):
        return 'AmqpClass("' + self.name + '")'

class AmqpMethod(AmqpEntity):
    def __init__(self, klass, element):
        AmqpEntity.__init__(self, element)
        self.klass = klass
        self.index = int(self.element['id'])
        if self.element.has_key('synchronous'):
            self.isSynchronous = self.element['synchronous']
        else:
            self.isSynchronous = False
        if self.element.has_key('content'):
            self.hasContent = self.element['content']
        else:
            self.hasContent = False
        self.arguments = []

        index = 0
        for argument in element['arguments']:
            self.arguments.append(AmqpField(self, argument, index))
            index = index + 1
        
    def __repr__(self):
        return 'AmqpMethod("' + self.klass.name + "." + self.name + '" ' + repr(self.arguments) + ')'

class AmqpField(AmqpEntity):
    def __init__(self, method, element, index):
        AmqpEntity.__init__(self, element)
        self.method = method
        self.index = index

        if self.element.has_key('type'):
            self.domain = self.element['type']
        else:
            self.domain = self.element['domain']
            
        if self.element.has_key('default-value'):
            self.defaultvalue = self.element['default-value']
        else:
            self.defaultvalue = None

    def __repr__(self):
        return 'AmqpField("' + self.name + '")'

def do_main(header_fn,body_fn):
    def usage():
        print >> sys.stderr , "Usage:"
        print >> sys.stderr , " %s header|body path_to_amqp_spec.json" % (sys.argv[0])
        print >> sys.stderr , ""
    if not len(sys.argv) == 3:
        usage()
        sys.exit(1)
    else:
        if sys.argv[1] == "header":
            header_fn(sys.argv[2])
        elif sys.argv[1] == "body":
            body_fn(sys.argv[2])
        else:
            usage()
            sys.exit(1)