/usr/share/pyshared/ZConfig/matcher.py is in python-zconfig 2.8.0-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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#
# Copyright (c) 2002, 2003 Zope Foundation and Contributors.
# All Rights Reserved.
#
# This software is subject to the provisions of the Zope Public License,
# Version 2.1 (ZPL). A copy of the ZPL should accompany this distribution.
# THIS SOFTWARE IS PROVIDED "AS IS" AND ANY AND ALL EXPRESS OR IMPLIED
# WARRANTIES ARE DISCLAIMED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
# WARRANTIES OF TITLE, MERCHANTABILITY, AGAINST INFRINGEMENT, AND FITNESS
# FOR A PARTICULAR PURPOSE.
#
##############################################################################
"""Utility that manages the binding of configuration data to a section."""
import ZConfig
from ZConfig.info import ValueInfo
class BaseMatcher:
def __init__(self, info, type, handlers):
self.info = info
self.type = type
self._values = {}
for key, info in type:
if info.name == "+" and not info.issection():
v = {}
elif info.ismulti():
v = []
else:
v = None
assert info.attribute is not None
self._values[info.attribute] = v
self._sectionnames = {}
if handlers is None:
handlers = []
self.handlers = handlers
def __repr__(self):
clsname = self.__class__.__name__
extra = "type " + `self.type.name`
return "<%s for %s>" % (clsname, extra)
def addSection(self, type, name, sectvalue):
if name:
if self._sectionnames.has_key(name):
raise ZConfig.ConfigurationError(
"section names must not be re-used within the"
" same container:" + `name`)
self._sectionnames[name] = name
ci = self.type.getsectioninfo(type, name)
attr = ci.attribute
v = self._values[attr]
if ci.ismulti():
v.append(sectvalue)
elif v is None:
self._values[attr] = sectvalue
else:
raise ZConfig.ConfigurationError(
"too many instances of %s section" % `ci.sectiontype.name`)
def addValue(self, key, value, position):
try:
realkey = self.type.keytype(key)
except ValueError, e:
raise ZConfig.DataConversionError(e, key, position)
arbkey_info = None
for i in range(len(self.type)):
k, ci = self.type[i]
if k == realkey:
break
if ci.name == "+" and not ci.issection():
arbkey_info = k, ci
else:
if arbkey_info is None:
raise ZConfig.ConfigurationError(
`key` + " is not a known key name")
k, ci = arbkey_info
if ci.issection():
if ci.name:
extra = " in %s sections" % `self.type.name`
else:
extra = ""
raise ZConfig.ConfigurationError(
"%s is not a valid key name%s" % (`key`, extra))
ismulti = ci.ismulti()
attr = ci.attribute
assert attr is not None
v = self._values[attr]
if v is None:
if k == '+':
v = {}
elif ismulti:
v = []
self._values[attr] = v
elif not ismulti:
if k != '+':
raise ZConfig.ConfigurationError(
`key` + " does not support multiple values")
elif len(v) == ci.maxOccurs:
raise ZConfig.ConfigurationError(
"too many values for " + `name`)
value = ValueInfo(value, position)
if k == '+':
if ismulti:
if v.has_key(realkey):
v[realkey].append(value)
else:
v[realkey] = [value]
else:
if v.has_key(realkey):
raise ZConfig.ConfigurationError(
"too many values for " + `key`)
v[realkey] = value
elif ismulti:
v.append(value)
else:
self._values[attr] = value
def createChildMatcher(self, type, name):
ci = self.type.getsectioninfo(type.name, name)
assert not ci.isabstract()
if not ci.isAllowedName(name):
raise ZConfig.ConfigurationError(
"%s is not an allowed name for %s sections"
% (`name`, `ci.sectiontype.name`))
return SectionMatcher(ci, type, name, self.handlers)
def finish(self):
"""Check the constraints of the section and convert to an application
object."""
values = self._values
for key, ci in self.type:
if key:
key = repr(key)
else:
key = "section type " + `ci.sectiontype.name`
assert ci.attribute is not None
attr = ci.attribute
v = values[attr]
if ci.name == '+' and not ci.issection():
# v is a dict
if ci.minOccurs > len(v):
raise ZConfig.ConfigurationError(
"no keys defined for the %s key/value map; at least %d"
" must be specified" % (attr, ci.minOccurs))
if v is None and ci.minOccurs:
default = ci.getdefault()
if default is None:
raise ZConfig.ConfigurationError(
"no values for %s; %s required" % (key, ci.minOccurs))
else:
v = values[attr] = default[:]
if ci.ismulti():
if not v:
default = ci.getdefault()
if isinstance(default, dict):
v.update(default)
else:
v[:] = default
if len(v) < ci.minOccurs:
raise ZConfig.ConfigurationError(
"not enough values for %s; %d found, %d required"
% (key, len(v), ci.minOccurs))
if v is None and not ci.issection():
if ci.ismulti():
v = ci.getdefault()[:]
else:
v = ci.getdefault()
values[attr] = v
return self.constuct()
def constuct(self):
values = self._values
for name, ci in self.type:
assert ci.attribute is not None
attr = ci.attribute
if ci.ismulti():
if ci.issection():
v = []
for s in values[attr]:
if s is not None:
st = s.getSectionDefinition()
try:
s = st.datatype(s)
except ValueError, e:
raise ZConfig.DataConversionError(
e, s, (-1, -1, None))
v.append(s)
elif ci.name == '+':
v = values[attr]
for key, val in v.items():
v[key] = [vi.convert(ci.datatype) for vi in val]
else:
v = [vi.convert(ci.datatype) for vi in values[attr]]
elif ci.issection():
if values[attr] is not None:
st = values[attr].getSectionDefinition()
try:
v = st.datatype(values[attr])
except ValueError, e:
raise ZConfig.DataConversionError(
e, values[attr], (-1, -1, None))
else:
v = None
elif name == '+':
v = values[attr]
if not v:
for key, val in ci.getdefault().items():
v[key] = val.convert(ci.datatype)
else:
for key, val in v.items():
v[key] = val.convert(ci.datatype)
else:
v = values[attr]
if v is not None:
v = v.convert(ci.datatype)
values[attr] = v
if ci.handler is not None:
self.handlers.append((ci.handler, v))
return self.createValue()
def createValue(self):
return SectionValue(self._values, None, self)
class SectionMatcher(BaseMatcher):
def __init__(self, info, type, name, handlers):
if name or info.allowUnnamed():
self.name = name
else:
raise ZConfig.ConfigurationError(
`type.name` + " sections may not be unnamed")
BaseMatcher.__init__(self, info, type, handlers)
def createValue(self):
return SectionValue(self._values, self.name, self)
class SchemaMatcher(BaseMatcher):
def __init__(self, schema):
BaseMatcher.__init__(self, schema, schema, [])
def finish(self):
# Since there's no outer container to call datatype()
# for the schema, we convert on the way out.
v = BaseMatcher.finish(self)
v = self.type.datatype(v)
if self.type.handler is not None:
self.handlers.append((self.type.handler, v))
return v
class SectionValue:
"""Generic 'bag-of-values' object for a section.
Derived classes should always call the SectionValue constructor
before attempting to modify self.
"""
def __init__(self, values, name, matcher):
self.__dict__.update(values)
self._name = name
self._matcher = matcher
self._attributes = tuple(values.keys())
def __repr__(self):
if self._name:
# probably unique for a given config file; more readable than id()
name = `self._name`
else:
# identify uniquely
name = "at %#x" % id(self)
clsname = self.__class__.__name__
return "<%s for %s %s>" % (clsname, self._matcher.type.name, name)
def __str__(self):
l = []
attrnames = [s for s in self.__dict__.keys() if s[0] != "_"]
attrnames.sort()
for k in attrnames:
v = getattr(self, k)
l.append('%-40s: %s' % (k, v))
return '\n'.join(l)
def getSectionName(self):
return self._name
def getSectionType(self):
return self._matcher.type.name
def getSectionDefinition(self):
return self._matcher.type
def getSectionMatcher(self):
return self._matcher
def getSectionAttributes(self):
return self._attributes
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