On Sun, 24 Apr 2011 19:24:58 +0100, Ricardo Gladwell wrote:
That would be great, thanks!
--
Ricardo Gladwell <[email protected]>
http://www.google.com/profiles/ricardo.gladwell
Twitter: @rgladwell - MSN: [email protected]
On Sun, 2011-04-24 at 14:11 -0400, Jonathan Ryan wrote:
On Sun, 24 Apr 2011 19:53:17 +0200, Luca Bruno wrote:
> On Sun, Apr 24, 2011 at 06:48:39PM +0100, Ricardo Gladwell wrote:
>> Hi Everyone
>>
>> Is there anyway to find out if a class is annotated with an
>> attribute,
>> and retrieve values from these attributes?
>
> The only way is using libvala to parse your own code.
>
>>
>> If not, are there any plans to provide such a feature?
>
> Not at the moment, it could be implemented for GObject classes
> though.
You can also do it using GObject-Introspection by parsing Girs.
I wrote a small python script to do it if you would like to see it.
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Jonathan Ryan
#! /usr/bin/env python
# Copyright 2011, Curious Computing LLC
from xml.parsers import expat
class Annotation:
def __init__(self, type, on, key, value):
self.type = type
self.on = on
self.name = on['glib:type-name']
self.key = key
self.value = value
def __str__(self):
return '<Annotation on %s %s: key=%s, value=%s>' % (self.type,
self.name, self.key, self.value)
def __repr__(self):
return "{u'type': u'%s', u'on': %s, u'key': '%s', u'value': '%s'}" % (self.type,
self.on, self.key, self.value)
class AnnotationParser:
def __init__(self):
self._parser = expat.ParserCreate()
self._parser.StartElementHandler = self.start
self._parser.EndElementHandler = self.end
#self._parser.CharacterDataHandler = self.data
self.namespace = None
self.version = None
self.package = None
self.enclosed = []
self.annotations = {}
self.classes = []
def feed(self, data):
self._parser.Parse(data, 0)
def close(self):
self._parser.Parse("", 1) # end of data
del self._parser # get rid of circular references
def start(self, tag, attrs):
self.parse_tag(tag, attrs)
self.enclosed.append((tag, attrs))
def parse_tag(self, tag, attrs):
if tag == 'annotation':
a = Annotation(self.enclosed[-1][0], self.enclosed[-1][1], attrs['key'], attrs['value'])
self.annotations.setdefault(a.name, {})[a.key] = a.value
elif tag == 'class':
self.classes.append(attrs['glib:type-name'])
elif tag == 'namespace':
self.namespace = attrs['name']
self.version = attrs['version']
elif tag == 'package':
self.package = attrs['name']
def end(self, tag):
self.enclosed.pop()
def data(self, data):
pass
if __name__ == '__main__':
import sys
import subprocess
import os
for f_name in sys.argv[1:]:
p = AnnotationParser()
f = open(f_name)
p.feed(f.read())
d = {
'memory-to-actor-serialization.from' : [],
'file-to-memory-serialization.to' : [],
'file-to-memory-serialization.extensions' : [],
'classes' : [],
'versions' : []
}
for k,v in p.annotations.items():
for k2,v2 in v.items():
for i in v2.split(' '):
d[k2].append(i)
if k2 == 'file-to-memory-serialization.extensions':
try:
d[k2].append(v['file-to-memory-serialization.to'])
except KeyError:
print(k + '[' + k2 + ']' + ' is missing a to attribute')
raise
else:
d[k2].append(k)
module_name = p.namespace
for c in p.classes:
d['classes'].extend([c, module_name]);
d['versions'].extend([module_name, p.version])
curious_home = os.environ.get('CURIOUS_HOME')
if not curious_home:
curious_home = os.environ.get('HOME') + '/.local/share/curious'
print("WARNING: CURIOUS_HOME environment variable not set! guessing...")
def cache(map, pairs):
if pairs:
cmd =['curious-cache', curious_home + '/' + map, '-p']
cmd.extend(pairs)
subprocess.call(cmd)
cache('system/type_to_module.map', d['classes'])
cache('system/module_to_version.map', d['versions'])
cache('system/serializations/from_memory_to_actor.map',
d['memory-to-actor-serialization.from'])
cache('system/serializations/from_file_to_memory.map',
d['file-to-memory-serialization.to'])
cache('system/serializations/extensions_to_memory.map',
d['file-to-memory-serialization.extensions'])
# vim: ft=python ts=4 sts=4 sw=4 et
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