Mac Easy 2010 May/Mac Life Ubuntu.iso/casper/filesystem.squashfs/usr/lib/python2.6/dist-packages/checkbox/registry.pyc

Python Compiled Bytecode | 2009-10-12 | 8.0 KB | 217 lines

# Source Generated with Decompyle++
# File: in.pyc (Python 2.6)

import re
from checkbox.lib.cache import cache
from checkbox.component import ComponentManager
from checkbox.properties import String

class Registry(object):
    '''
    Registry base class which should be inherited by each registry
    implementation. This class basically provides methods to represent
    the items in the registry as attributes. If some items cannot
    be represented as attributes, if there are spaces in the name
    for example, this class also provides methods to reprent them as
    dictionary elements.
    '''
    _id = 0
    user = String(required = False)

    def __init__(self):
        super(Registry, self).__init__()
        self.id = Registry._id
        Registry._id += 1


    def __str__(self):
        raise NotImplementedError, 'this function must be overridden by subclasses'


    def __getattr__(self, name):
        return self.get(name)


    def split(self, *args, **kwargs):
        return str(self).split(*args, **kwargs)


    def items(self):
        raise NotImplementedError, 'this function must be overridden by subclasses'


    def get(self, key, default = None):

        try:
            return self.__getitem__(key)
        except KeyError:
            if default == None:
                NoneRegistry = NoneRegistry
                import checkbox.registries.none
                return NoneRegistry()
            return default
        except:
            default == None



    def has_key(self, key):
        return key in self.keys()


    def iteritems(self):
        for k, v in self.items():
            yield (k, v)



    def iterkeys(self):
        LinkRegistry = LinkRegistry
        import checkbox.registries.link
        for k, v in self.items():
            if not isinstance(v, LinkRegistry):
                yield k
                continue



    def keys(self):
        return list(self.iterkeys())


    def itervalues(self):
        LinkRegistry = LinkRegistry
        import checkbox.registries.link
        for k, v in self.items():
            if not isinstance(v, LinkRegistry):
                yield v
                continue



    def values(self):
        return list(self.itervalues())


    def clear(self):
        raise Exception, 'Cannot call clear on registry.'


    def setdefault(self, key, default = None):
        raise Exception, 'Cannot call setdefault on registry.'


    def __cmp__(self, foreign):
        local = set(self.items())
        foreign = set(foreign.items())
        if local == foreign:
            return 0
        if local < foreign:
            return -1
        return 1


    def __contains__(self, key):
        return key in self.keys()


    def __len__(self):
        return len(self.keys())


    def __getitem__(self, key):
        for k, v in self.items():
            if k == key:
                return v

        raise KeyError


    def __setitem__(self, key, value):
        raise Exception, 'Cannot set setitem on registry.'


    def __delitem__(self, key):
        raise Exception, 'Cannot call delitem on registry.'


    def update(self, foreign):
        raise Exception, 'Cannot call update on registry.'



class RegistryManager(ComponentManager, Registry):
    '''
    Registry manager which is essentially the root of the registry
    tree. The first level in this tree consists of the module names
    which have been loaded from the registries configuration parameter.
    '''

    def items(self):
        items = []
        registries = self._config.get_defaults().registries
        section_names = re.split('\\s+', registries)
        for section_name in section_names:
            section = self.load_section(section_name)
            for name in section.get_names():
                module = section.load_module(name)
                items.append((name, module))


        return items

    items = cache(items)


def registry_flatten(registry):

    def get_properties(properties, key, value):
        if isinstance(value, Registry):
            for dict_key, dict_value in value.items():
                get_properties(properties, '.'.join([
                    key,
                    dict_key]), dict_value)

        else:
            properties[key] = value

    properties = { }
    for key, value in registry.items():
        get_properties(properties, key, value)

    return properties


def registry_eval(registry, source):

    try:
        return eval(source, { }, registry)
    except Exception:
        return False



def registry_eval_recursive(registry, source, mask = [
    False]):
    values = []
    value = registry_eval(registry, source)
    if type(value) in (bool, int) and value:
        values.append(registry)
        mask[0] = True
    elif type(value) is tuple and True in value:
        for i in range(len(value)):
            if value[i] is True or i >= len(mask):
                mask[i:i + 1] = [
                    value[i]]
                continue

        values.append(registry)

    for key, value in registry.items():
        if isinstance(value, Registry):
            values.extend(registry_eval_recursive(value, source, mask))
            continue

    return values