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#!/usr/bin/env python3
# encoding: utf-8
"""
_Transform.py
Created by Graham Dennis on 2008-07-30.
Copyright (c) 2008-2012, Graham Dennis
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 2 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 GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
"""
from xpdeint.ScriptElement import ScriptElement
from xpdeint.Geometry._Dimension import _Dimension
from xpdeint.Utilities import lazy_property
class _Transform (ScriptElement):
mpiCapableSubclass = None
def __init__(self, *args, **KWs):
ScriptElement.__init__(self, *args, **KWs)
# Register ourselves with the transform multiplexer
self.getVar('features')['TransformMultiplexer'].transforms.add(self)
self.transformations = []
def __hash__(self):
"""
Returns a hash of the transform.
This is used to ensure the ordering of transforms in sets remains the same between invocations.
"""
return hash(self.transformName)
@lazy_property
def isMPICapable(self):
return bool(self.mpiCapableSubclass)
@property
def vectorsNeedingThisTransform(self):
vectors = set()
for f in self.getVar('fields'): vectors.update(f.vectors)
return set([v for v in vectors if v.needsTransforms and any([d.transform == self for d in v.field.dimensions])])
def initialiseForMPIWithDimensions(self, dimensions):
"""Upgrade the current class to support MPI."""
assert self.isMPICapable
assert not self.__class__ == self.mpiCapableSubclass
self.__class__ = self.mpiCapableSubclass
self._driver.distributedTransform = self
# MPI subclass must define this method
self.initialiseForMPIWithDimensions(dimensions)
def newDimension(self, name, lattice, minimum, maximum,
parent, transformName, aliases = set(),
type = 'real', volumePrefactor = None, xmlElement = None):
dim = _Dimension(name = name, transform = self, aliases = aliases, volumePrefactor = volumePrefactor,
parent = parent, xmlElement = xmlElement,
**self.argumentsToTemplateConstructors)
return dim
def setVectorAllocSizes(self, vectors):
return ''
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