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# 

# LSST Data Management System 

# Copyright 2008, 2009, 2010 LSST Corporation. 

# 

# This product includes software developed by the 

# LSST Project (http://www.lsst.org/). 

# 

# This program is free software: you can redistribute it and/or modify 

# it under the terms of the GNU General Public License as published by 

# the Free Software Foundation, either version 3 of the License, or 

# (at your option) any later version. 

# 

# This program is distributed in the hope that it will be useful, 

# but WITHOUT ANY WARRANTY; without even the implied warranty of 

# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 

# GNU General Public License for more details. 

# 

# You should have received a copy of the LSST License Statement and 

# the GNU General Public License along with this program. If not, 

# see <http://www.lsstcorp.org/LegalNotices/>. 

# 

from __future__ import print_function 

from builtins import str 

 

import copy 

import collections 

 

from .config import Config, Field, FieldValidationError, _typeStr, _joinNamePath 

from .comparison import getComparisonName, compareScalars, compareConfigs 

from .callStack import getCallStack, getStackFrame 

 

__all__ = ["ConfigChoiceField"] 

 

 

class SelectionSet(collections.MutableSet): 

""" 

Custom set class used to track the selection of multi-select 

ConfigChoiceField. 

 

This class allows user a multi-select ConfigChoiceField to add/discard 

items from the set of active configs. Each change to the selection is 

tracked in the field's history. 

""" 

def __init__(self, dict_, value, at=None, label="assignment", setHistory=True): 

45 ↛ 47line 45 didn't jump to line 47, because the condition on line 45 was never false if at is None: 

at = getCallStack() 

self._dict = dict_ 

self._field = self._dict._field 

self._config = self._dict._config 

self.__history = self._config._history.setdefault(self._field.name, []) 

51 ↛ 62line 51 didn't jump to line 62, because the condition on line 51 was never false if value is not None: 

try: 

for v in value: 

if v not in self._dict: 

# invoke __getitem__ to ensure it's present 

self._dict.__getitem__(v, at=at) 

except TypeError: 

msg = "Value %s is of incorrect type %s. Sequence type expected"(value, _typeStr(value)) 

raise FieldValidationError(self._field, self._config, msg) 

self._set = set(value) 

else: 

self._set = set() 

 

64 ↛ 65line 64 didn't jump to line 65, because the condition on line 64 was never true if setHistory: 

self.__history.append(("Set selection to %s" % self, at, label)) 

 

def add(self, value, at=None): 

68 ↛ 69line 68 didn't jump to line 69, because the condition on line 68 was never true if self._config._frozen: 

raise FieldValidationError(self._field, self._config, 

"Cannot modify a frozen Config") 

 

72 ↛ 75line 72 didn't jump to line 75, because the condition on line 72 was never false if at is None: 

at = getCallStack() 

 

if value not in self._dict: 

# invoke __getitem__ to make sure it's present 

self._dict.__getitem__(value, at=at) 

 

self.__history.append(("added %s to selection" % value, at, "selection")) 

self._set.add(value) 

 

def discard(self, value, at=None): 

83 ↛ 84line 83 didn't jump to line 84, because the condition on line 83 was never true if self._config._frozen: 

raise FieldValidationError(self._field, self._config, 

"Cannot modify a frozen Config") 

 

87 ↛ 88line 87 didn't jump to line 88, because the condition on line 87 was never true if value not in self._dict: 

return 

 

90 ↛ 93line 90 didn't jump to line 93, because the condition on line 90 was never false if at is None: 

at = getCallStack() 

 

self.__history.append(("removed %s from selection" % value, at, "selection")) 

self._set.discard(value) 

 

def __len__(self): 

return len(self._set) 

 

def __iter__(self): 

return iter(self._set) 

 

def __contains__(self, value): 

return value in self._set 

 

def __repr__(self): 

return repr(list(self._set)) 

 

def __str__(self): 

return str(list(self._set)) 

 

 

class ConfigInstanceDict(collections.Mapping): 

"""A dict of instantiated configs, used to populate a ConfigChoiceField. 

 

typemap must support the following: 

- typemap[name]: return the config class associated with the given name 

""" 

def __init__(self, config, field): 

collections.Mapping.__init__(self) 

self._dict = dict() 

self._selection = None 

self._config = config 

self._field = field 

self._history = config._history.setdefault(field.name, []) 

self.__doc__ = field.doc 

 

127 ↛ exitline 127 didn't run the lambda on line 127 types = property(lambda x: x._field.typemap) 

 

def __contains__(self, k): 

return k in self._field.typemap 

 

def __len__(self): 

return len(self._field.typemap) 

 

def __iter__(self): 

return iter(self._field.typemap) 

 

def _setSelection(self, value, at=None, label="assignment"): 

if self._config._frozen: 

raise FieldValidationError(self._field, self._config, "Cannot modify a frozen Config") 

 

if at is None: 

at = getCallStack(1) 

 

if value is None: 

self._selection = None 

elif self._field.multi: 

self._selection = SelectionSet(self, value, setHistory=False) 

else: 

if value not in self._dict: 

self.__getitem__(value, at=at) # just invoke __getitem__ to make sure it's present 

self._selection = value 

self._history.append((value, at, label)) 

 

def _getNames(self): 

156 ↛ 157line 156 didn't jump to line 157, because the condition on line 156 was never true if not self._field.multi: 

raise FieldValidationError(self._field, self._config, 

"Single-selection field has no attribute 'names'") 

return self._selection 

 

def _setNames(self, value): 

162 ↛ 163line 162 didn't jump to line 163, because the condition on line 162 was never true if not self._field.multi: 

raise FieldValidationError(self._field, self._config, 

"Single-selection field has no attribute 'names'") 

self._setSelection(value) 

 

def _delNames(self): 

if not self._field.multi: 

raise FieldValidationError(self._field, self._config, 

"Single-selection field has no attribute 'names'") 

self._selection = None 

 

def _getName(self): 

174 ↛ 175line 174 didn't jump to line 175, because the condition on line 174 was never true if self._field.multi: 

raise FieldValidationError(self._field, self._config, 

"Multi-selection field has no attribute 'name'") 

return self._selection 

 

def _setName(self, value): 

180 ↛ 181line 180 didn't jump to line 181, because the condition on line 180 was never true if self._field.multi: 

raise FieldValidationError(self._field, self._config, 

"Multi-selection field has no attribute 'name'") 

self._setSelection(value) 

 

def _delName(self): 

if self._field.multi: 

raise FieldValidationError(self._field, self._config, 

"Multi-selection field has no attribute 'name'") 

self._selection = None 

 

""" 

In a multi-selection ConfigInstanceDict, list of names of active items 

Disabled In a single-selection _Regsitry) 

""" 

names = property(_getNames, _setNames, _delNames) 

 

""" 

In a single-selection ConfigInstanceDict, name of the active item 

Disabled In a multi-selection _Regsitry) 

""" 

name = property(_getName, _setName, _delName) 

 

def _getActive(self): 

if self._selection is None: 

return None 

 

if self._field.multi: 

return [self[c] for c in self._selection] 

else: 

return self[self._selection] 

 

""" 

Readonly shortcut to access the selected item(s) 

for multi-selection, this is equivalent to: [self[name] for name in self.names] 

for single-selection, this is equivalent to: self[name] 

""" 

active = property(_getActive) 

 

def __getitem__(self, k, at=None, label="default"): 

try: 

value = self._dict[k] 

except KeyError: 

try: 

dtype = self._field.typemap[k] 

except Exception: 

raise FieldValidationError(self._field, self._config, 

"Unknown key %r in Registry/ConfigChoiceField" % k) 

name = _joinNamePath(self._config._name, self._field.name, k) 

if at is None: 

at = getCallStack() 

at.insert(0, dtype._source) 

value = self._dict.setdefault(k, dtype(__name=name, __at=at, __label=label)) 

return value 

 

def __setitem__(self, k, value, at=None, label="assignment"): 

236 ↛ 237line 236 didn't jump to line 237, because the condition on line 236 was never true if self._config._frozen: 

raise FieldValidationError(self._field, self._config, "Cannot modify a frozen Config") 

 

try: 

dtype = self._field.typemap[k] 

except Exception: 

raise FieldValidationError(self._field, self._config, "Unknown key %r" % k) 

 

244 ↛ 245line 244 didn't jump to line 245, because the condition on line 244 was never true if value != dtype and type(value) != dtype: 

msg = "Value %s at key %k is of incorrect type %s. Expected type %s" % \ 

(value, k, _typeStr(value), _typeStr(dtype)) 

raise FieldValidationError(self._field, self._config, msg) 

 

if at is None: 

at = getCallStack() 

name = _joinNamePath(self._config._name, self._field.name, k) 

oldValue = self._dict.get(k, None) 

if oldValue is None: 

254 ↛ 255line 254 didn't jump to line 255, because the condition on line 254 was never true if value == dtype: 

self._dict[k] = value(__name=name, __at=at, __label=label) 

else: 

self._dict[k] = dtype(__name=name, __at=at, __label=label, **value._storage) 

else: 

259 ↛ 260line 259 didn't jump to line 260, because the condition on line 259 was never true if value == dtype: 

value = value() 

oldValue.update(__at=at, __label=label, **value._storage) 

 

def _rename(self, fullname): 

for k, v in self._dict.items(): 

v._rename(_joinNamePath(name=fullname, index=k)) 

 

def __setattr__(self, attr, value, at=None, label="assignment"): 

if hasattr(getattr(self.__class__, attr, None), '__set__'): 

# This allows properties to work. 

object.__setattr__(self, attr, value) 

elif attr in self.__dict__ or attr in ["_history", "_field", "_config", "_dict", 

"_selection", "__doc__"]: 

# This allows specific private attributes to work. 

object.__setattr__(self, attr, value) 

else: 

# We throw everything else. 

msg = "%s has no attribute %s" % (_typeStr(self._field), attr) 

raise FieldValidationError(self._field, self._config, msg) 

 

 

class ConfigChoiceField(Field): 

""" 

ConfigChoiceFields allow the config to choose from a set of possible Config types. 

The set of allowable types is given by the typemap argument to the constructor 

 

The typemap object must implement typemap[name], which must return a Config subclass. 

 

While the typemap is shared by all instances of the field, each instance of 

the field has its own instance of a particular sub-config type 

 

For example: 

 

class AaaConfig(Config): 

somefield = Field(int, "...") 

TYPEMAP = {"A", AaaConfig} 

class MyConfig(Config): 

choice = ConfigChoiceField("doc for choice", TYPEMAP) 

 

instance = MyConfig() 

instance.choice['AAA'].somefield = 5 

instance.choice = "AAA" 

 

Alternatively, the last line can be written: 

instance.choice.name = "AAA" 

 

Validation of this field is performed only the "active" selection. 

If active is None and the field is not optional, validation will fail. 

 

ConfigChoiceFields can allow single selections or multiple selections. 

Single selection fields set selection through property name, and 

multi-selection fields use the property names. 

 

ConfigChoiceFields also allow multiple values of the same type: 

TYPEMAP["CCC"] = AaaConfig 

TYPEMAP["BBB"] = AaaConfig 

 

When saving a config with a ConfigChoiceField, the entire set is saved, as well as the active selection 

""" 

instanceDictClass = ConfigInstanceDict 

 

def __init__(self, doc, typemap, default=None, optional=False, multi=False): 

source = getStackFrame() 

self._setup(doc=doc, dtype=self.instanceDictClass, default=default, check=None, optional=optional, 

source=source) 

self.typemap = typemap 

self.multi = multi 

 

def _getOrMake(self, instance, label="default"): 

instanceDict = instance._storage.get(self.name) 

if instanceDict is None: 

at = getCallStack(1) 

instanceDict = self.dtype(instance, self) 

instanceDict.__doc__ = self.doc 

instance._storage[self.name] = instanceDict 

history = instance._history.setdefault(self.name, []) 

history.append(("Initialized from defaults", at, label)) 

 

return instanceDict 

 

def __get__(self, instance, owner=None): 

if instance is None or not isinstance(instance, Config): 

return self 

else: 

return self._getOrMake(instance) 

 

def __set__(self, instance, value, at=None, label="assignment"): 

if instance._frozen: 

raise FieldValidationError(self, instance, "Cannot modify a frozen Config") 

349 ↛ 350line 349 didn't jump to line 350, because the condition on line 349 was never true if at is None: 

at = getCallStack() 

instanceDict = self._getOrMake(instance) 

if isinstance(value, self.instanceDictClass): 

for k, v in value.items(): 

instanceDict.__setitem__(k, v, at=at, label=label) 

instanceDict._setSelection(value._selection, at=at, label=label) 

 

else: 

instanceDict._setSelection(value, at=at, label=label) 

 

def rename(self, instance): 

instanceDict = self.__get__(instance) 

fullname = _joinNamePath(instance._name, self.name) 

instanceDict._rename(fullname) 

 

def validate(self, instance): 

instanceDict = self.__get__(instance) 

if instanceDict.active is None and not self.optional: 

msg = "Required field cannot be None" 

raise FieldValidationError(self, instance, msg) 

elif instanceDict.active is not None: 

if self.multi: 

for a in instanceDict.active: 

a.validate() 

else: 

instanceDict.active.validate() 

 

def toDict(self, instance): 

instanceDict = self.__get__(instance) 

 

dict_ = {} 

381 ↛ 382line 381 didn't jump to line 382, because the condition on line 381 was never true if self.multi: 

dict_["names"] = instanceDict.names 

else: 

dict_["name"] = instanceDict.name 

 

values = {} 

for k, v in instanceDict.items(): 

values[k] = v.toDict() 

dict_["values"] = values 

 

return dict_ 

 

def freeze(self, instance): 

instanceDict = self.__get__(instance) 

for v in instanceDict.values(): 

v.freeze() 

 

def save(self, outfile, instance): 

instanceDict = self.__get__(instance) 

fullname = _joinNamePath(instance._name, self.name) 

for v in instanceDict.values(): 

v._save(outfile) 

if self.multi: 

outfile.write(u"{}.names={!r}\n".format(fullname, instanceDict.names)) 

else: 

outfile.write(u"{}.name={!r}\n".format(fullname, instanceDict.name)) 

 

def __deepcopy__(self, memo): 

"""Customize deep-copying, because we always want a reference to the original typemap. 

 

WARNING: this must be overridden by subclasses if they change the constructor signature! 

""" 

other = type(self)(doc=self.doc, typemap=self.typemap, default=copy.deepcopy(self.default), 

optional=self.optional, multi=self.multi) 

other.source = self.source 

return other 

 

def _compare(self, instance1, instance2, shortcut, rtol, atol, output): 

"""Helper function for Config.compare; used to compare two fields for equality. 

 

Only the selected config(s) are compared, as the parameters of any others do not matter. 

 

@param[in] instance1 LHS Config instance to compare. 

@param[in] instance2 RHS Config instance to compare. 

@param[in] shortcut If True, return as soon as an inequality is found. 

@param[in] rtol Relative tolerance for floating point comparisons. 

@param[in] atol Absolute tolerance for floating point comparisons. 

@param[in] output If not None, a callable that takes a string, used (possibly repeatedly) 

to report inequalities. 

 

Floating point comparisons are performed by numpy.allclose; refer to that for details. 

""" 

d1 = getattr(instance1, self.name) 

d2 = getattr(instance2, self.name) 

name = getComparisonName( 

_joinNamePath(instance1._name, self.name), 

_joinNamePath(instance2._name, self.name) 

) 

439 ↛ 440line 439 didn't jump to line 440, because the condition on line 439 was never true if not compareScalars("selection for %s" % name, d1._selection, d2._selection, output=output): 

return False 

441 ↛ 442line 441 didn't jump to line 442, because the condition on line 441 was never true if d1._selection is None: 

return True 

443 ↛ 444line 443 didn't jump to line 444, because the condition on line 443 was never true if self.multi: 

nested = [(k, d1[k], d2[k]) for k in d1._selection] 

else: 

nested = [(d1._selection, d1[d1._selection], d2[d1._selection])] 

equal = True 

for k, c1, c2 in nested: 

result = compareConfigs("%s[%r]" % (name, k), c1, c2, shortcut=shortcut, 

rtol=rtol, atol=atol, output=output) 

451 ↛ 452line 451 didn't jump to line 452, because the condition on line 451 was never true if not result and shortcut: 

return False 

equal = equal and result 

return equal