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"""Converts python models to the necessary inputs for the compiled RAT code."""
import importlib
import os
import pathlib
from typing import Callable, Union
import numpy as np
import ratapi
import ratapi.controls
import ratapi.wrappers
from ratapi.rat_core import Checks, Control, NameStore, ProblemDefinition
from ratapi.utils.enums import Calculations, Languages, LayerModels, TypeOptions
parameter_field = {
"parameters": "params",
"bulk_in": "bulkIns",
"bulk_out": "bulkOuts",
"scalefactors": "scalefactors",
"domain_ratios": "domainRatios",
"background_parameters": "backgroundParams",
"resolution_parameters": "resolutionParams",
}
def get_python_handle(file_name: str, function_name: str, path: Union[str, pathlib.Path] = "") -> Callable:
"""Get the function handle from a function defined in a python module located anywhere within the filesystem.
Parameters
----------
file_name : str
The name of the file containing the function of interest.
function_name : str
The name of the function we wish to obtain the handle for within the module.
path : str
The path to the file containing the function (default is "", which represent the working directory).
Returns
-------
handle : Callable
The handle of the function defined in the python module file.
"""
spec = importlib.util.spec_from_file_location(pathlib.Path(file_name).stem, os.path.join(path, file_name))
custom_module = importlib.util.module_from_spec(spec)
spec.loader.exec_module(custom_module)
handle = getattr(custom_module, function_name)
return handle
class FileHandles:
"""Class to defer creation of custom file handles.
Parameters
----------
files : ClassList[CustomFile]
A list of custom file models.
"""
def __init__(self, files=None):
self.index = 0
self.files = [] if files is None else [file.model_dump() for file in files]
def __iter__(self):
self.index = 0
return self
def get_handle(self, index: int):
"""Return file handle for a given custom file.
Parameters
----------
index : int
The index of the custom file.
"""
custom_file = self.files[index]
full_path = os.path.join(custom_file["path"], custom_file["filename"])
if custom_file["language"] == Languages.Python:
file_handle = get_python_handle(custom_file["filename"], custom_file["function_name"], custom_file["path"])
elif custom_file["language"] == Languages.Matlab:
file_handle = ratapi.wrappers.MatlabWrapper(full_path).getHandle()
elif custom_file["language"] == Languages.Cpp:
file_handle = ratapi.wrappers.DylibWrapper(full_path, custom_file["function_name"]).getHandle()
return file_handle
def copy(self) -> "FileHandles":
"""Create a copy of the FileHandles object.
Returns
-------
FileHandles
The copy of this FileHandles object.
"""
handles = FileHandles()
handles.files = [file.copy() for file in self.files]
return handles
def __next__(self):
if self.index < len(self.files):
custom_file = self.get_handle(self.index)
self.index += 1
return custom_file
else:
raise StopIteration
def __len__(self):
return len(self.files)
def make_input(project: ratapi.Project, controls: ratapi.Controls) -> tuple[ProblemDefinition, Control]:
"""Construct the inputs required for the compiled RAT code using the data defined in the input project and controls.
Parameters
----------
project : RAT.Project
The project model, which defines the physical system under study.
controls : RAT.Controls
The controls model, which defines algorithmic properties.
Returns
-------
problem : RAT.rat_core.ProblemDefinition
The problem input used in the compiled RAT code.
cpp_controls : RAT.rat_core.Control
The controls object used in the compiled RAT code.
"""
problem = make_problem(project)
cpp_controls = make_controls(controls)
return problem, cpp_controls
def make_problem(project: ratapi.Project) -> ProblemDefinition:
"""Construct the problem input required for the compiled RAT code.
Parameters
----------
project : RAT.Project
The project model, which defines the physical system under study.
Returns
-------
problem : RAT.rat_core.ProblemDefinition
The problem input used in the compiled RAT code.
"""
prior_id = {"uniform": 1, "gaussian": 2, "jeffreys": 3}
# Ensure all contrast fields are properly defined
for contrast in project.contrasts:
contrast_fields = ["data", "background", "bulk_in", "bulk_out", "scalefactor", "resolution"]
if project.calculation == Calculations.Domains:
contrast_fields.append("domain_ratio")
for field in contrast_fields:
if getattr(contrast, field) == "":
raise ValueError(
f'In the input project, the "{field}" field of contrast "{contrast.name}" does not have a '
f"value defined. A value must be supplied before running the project."
)
# Ensure backgrounds and resolutions have a source defined
background = project.backgrounds[contrast.background]
resolution = project.resolutions[contrast.resolution]
if background.source == "":
raise ValueError(
f"All backgrounds must have a source defined. For a {background.type} type background, "
f"the source must be defined in "
f'"{ratapi.project.values_defined_in[f"backgrounds.{background.type}.source"]}"'
)
if resolution.source == "" and resolution.type != TypeOptions.Data:
raise ValueError(
f"Constant resolutions must have a source defined. The source must be defined in "
f'"{ratapi.project.values_defined_in[f"resolutions.{resolution.type}.source"]}"'
)
# Set contrast parameters according to model type
if project.model == LayerModels.StandardLayers:
if project.calculation == Calculations.Domains:
contrast_models = [
[project.domain_contrasts.index(domain_contrast, True) for domain_contrast in contrast.model]
for contrast in project.contrasts
]
else:
contrast_models = [
[project.layers.index(layer, True) for layer in contrast.model] for contrast in project.contrasts
]
else:
contrast_models = [[]] * len(project.contrasts)
# Set contrast parameters according to model type
if project.model == LayerModels.StandardLayers:
contrast_custom_files = [float("NaN")] * len(project.contrasts)
else:
contrast_custom_files = [project.custom_files.index(contrast.model[0], True) for contrast in project.contrasts]
# Get details of defined layers
layer_details = get_layer_details(project)
contrast_background_params = []
contrast_background_types = []
all_data = []
data_limits = []
simulation_limits = []
contrast_resolution_params = []
contrast_resolution_types = []
# Set data, background and resolution for each contrast
for contrast in project.contrasts:
# Set data
data_index = project.data.index(contrast.data)
data = project.data[data_index].data
data_range = project.data[data_index].data_range
simulation_range = project.data[data_index].simulation_range
if data_range:
data_limits.append(data_range)
else:
data_limits.append([0.0, 0.0])
if simulation_range:
simulation_limits.append(simulation_range)
else:
simulation_limits.append([0.0, 0.0])
# Set background parameters
background = project.backgrounds[contrast.background]
contrast_background_types.append(background.type)
contrast_background_param = []
if background.type == TypeOptions.Data:
contrast_background_param.append(project.data.index(background.source, True))
if background.value_1 != "":
contrast_background_param.append(project.background_parameters.index(background.value_1))
# If we are using a data background, we add the background data to the contrast data
data = append_data_background(data, project.data[background.source].data)
elif background.type == TypeOptions.Function:
contrast_background_param.append(project.custom_files.index(background.source, True))
contrast_background_param.extend(
[
project.background_parameters.index(value, True)
for value in [
background.value_1,
background.value_2,
background.value_3,
background.value_4,
background.value_5,
]
if value != ""
]
)
else:
contrast_background_param.append(project.background_parameters.index(background.source, True))
contrast_background_params.append(contrast_background_param)
# Set resolution parameters
resolution = project.resolutions[contrast.resolution]
contrast_resolution_types.append(resolution.type)
contrast_resolution_param = []
if resolution.type == TypeOptions.Function:
contrast_resolution_param.append(project.custom_files.index(resolution.source, True))
contrast_resolution_param.extend(
[
project.resolution_parameters.index(value, True)
for value in [
resolution.value_1,
resolution.value_2,
resolution.value_3,
resolution.value_4,
resolution.value_5,
]
if value != ""
]
)
elif resolution.type == TypeOptions.Constant:
contrast_resolution_param.append(project.resolution_parameters.index(resolution.source, True))
contrast_resolution_params.append(contrast_resolution_param)
# Contrast data has exactly six columns to include background data if relevant
all_data.append(np.column_stack((data, np.zeros((data.shape[0], 6 - data.shape[1])))))
problem = ProblemDefinition()
problem.TF = project.calculation
problem.resample = make_resample(project)
problem.data = all_data
problem.dataPresent = make_data_present(project)
problem.dataLimits = data_limits
problem.simulationLimits = simulation_limits
problem.numberOfContrasts = len(project.contrasts)
problem.geometry = project.geometry
problem.useImaginary = project.absorption
problem.repeatLayers = [1] * len(project.contrasts)
problem.contrastBackgroundParams = contrast_background_params
problem.contrastBackgroundTypes = contrast_background_types
problem.contrastBackgroundActions = [contrast.background_action for contrast in project.contrasts]
problem.contrastScalefactors = [
project.scalefactors.index(contrast.scalefactor, True) for contrast in project.contrasts
]
problem.contrastBulkIns = [project.bulk_in.index(contrast.bulk_in, True) for contrast in project.contrasts]
problem.contrastBulkOuts = [project.bulk_out.index(contrast.bulk_out, True) for contrast in project.contrasts]
problem.contrastResolutionParams = contrast_resolution_params
problem.contrastResolutionTypes = contrast_resolution_types
problem.backgroundParams = [param.value for param in project.background_parameters]
problem.scalefactors = [param.value for param in project.scalefactors]
problem.bulkIns = [param.value for param in project.bulk_in]
problem.bulkOuts = [param.value for param in project.bulk_out]
problem.resolutionParams = [param.value for param in project.resolution_parameters]
problem.params = [param.value for param in project.parameters]
problem.numberOfLayers = len(project.layers)
problem.contrastLayers = [contrast_model if contrast_model else [] for contrast_model in contrast_models]
problem.layersDetails = layer_details if project.model == LayerModels.StandardLayers else []
problem.customFiles = FileHandles(project.custom_files)
problem.modelType = project.model
problem.contrastCustomFiles = contrast_custom_files
problem.contrastDomainRatios = [
project.domain_ratios.index(contrast.domain_ratio, True) if hasattr(contrast, "domain_ratio") else 0
for contrast in project.contrasts
]
problem.domainRatios = [param.value for param in project.domain_ratios]
problem.numberOfDomainContrasts = len(project.domain_contrasts)
domain_contrast_models = [
[project.layers.index(layer, True) for layer in domain_contrast.model]
for domain_contrast in project.domain_contrasts
]
problem.domainContrastLayers = [
domain_contrast_model if domain_contrast_model else [] for domain_contrast_model in domain_contrast_models
]
problem.fitParams = [
param.value
for class_list in ratapi.project.parameter_class_lists
for param in getattr(project, class_list)
if param.fit
]
problem.fitLimits = [
[param.min, param.max]
for class_list in ratapi.project.parameter_class_lists
for param in getattr(project, class_list)
if param.fit
]
problem.priorNames = [
param.name for class_list in ratapi.project.parameter_class_lists for param in getattr(project, class_list)
]
problem.priorValues = [
[prior_id[param.prior_type], param.mu, param.sigma]
for class_list in ratapi.project.parameter_class_lists
for param in getattr(project, class_list)
]
# Names
problem.names = NameStore()
for class_list in ratapi.project.parameter_class_lists:
setattr(problem.names, parameter_field[class_list], [param.name for param in getattr(project, class_list)])
problem.names.contrasts = [contrast.name for contrast in project.contrasts]
# Checks
problem.checks = Checks()
for class_list in ratapi.project.parameter_class_lists:
setattr(
problem.checks, parameter_field[class_list], [int(element.fit) for element in getattr(project, class_list)]
)
check_indices(problem)
return problem
def get_layer_details(project: ratapi.Project) -> list[int]:
"""Get parameter indices for all layers defined in the project."""
hydrate_id = {"bulk in": 1, "bulk out": 2}
layer_details = []
# Get the thickness, SLD, roughness fields from the appropriate model
if project.absorption:
layer_fields = list(ratapi.models.AbsorptionLayer.model_fields.keys())[1:-2]
else:
layer_fields = list(ratapi.models.Layer.model_fields.keys())[1:-2]
for layer in project.layers:
for field in layer_fields:
if getattr(layer, field) == "":
raise ValueError(
f'In the input project, the "{field}" field of layer {layer.name} does not have a value '
f"defined. A value must be supplied before running the project."
)
layer_params = [project.parameters.index(getattr(layer, attribute), True) for attribute in list(layer_fields)]
layer_params.append(project.parameters.index(layer.hydration, True) if layer.hydration else float("NaN"))
layer_params.append(hydrate_id[layer.hydrate_with])
layer_details.append(layer_params)
return layer_details
def make_resample(project: ratapi.Project) -> list[int]:
"""Construct the "resample" field of the problem input required for the compiled RAT code.
Parameters
----------
project : RAT.Project
The project model, which defines the physical system under study.
Returns
-------
list[int]
The "resample" field of the problem input used in the compiled RAT code.
"""
return [contrast.resample for contrast in project.contrasts]
def make_data_present(project: ratapi.Project) -> list[int]:
"""Construct the "dataPresent" field of the problem input required for the compiled RAT code.
Parameters
----------
project : RAT.Project
The project model, which defines the physical system under study.
Returns
-------
list[int]
The "dataPresent" field of the problem input used in the compiled RAT code.
"""
return [1 if project.data[contrast.data].data.size != 0 else 0 for contrast in project.contrasts]
def check_indices(problem: ProblemDefinition) -> None:
"""Check the indices given in a problem's contrasts lie within the range of the corresponding parameter lists.
Parameters
----------
problem : RAT.rat_core.ProblemDefinition
The problem input used in the compiled RAT code.
"""
index_list = {
"scalefactors": "contrastScalefactors",
"bulkIns": "contrastBulkIns",
"bulkOuts": "contrastBulkOuts",
"domainRatios": "contrastDomainRatios",
}
# Check the indices -- note we have switched to 1-based indexing at this point
for params in index_list:
param_list = getattr(problem, params)
if len(param_list) > 0:
elements = [
element
for element in getattr(problem, index_list[params])
if (element != -1) and not (0 < element <= len(param_list))
]
if elements:
raise IndexError(
f'The problem field "{index_list[params]}" contains: {", ".join(str(i) for i in elements)}'
f', which lie{"s" * (len(elements) == 1)} outside of the range of "{params}"',
)
# backgroundParams has a different structure, so is handled separately:
# it is of type list[list[int]], where each list[int] is the indices for
# source, value_1, value_2, value_3, value_4, value_5 where they are defined
# e.g. for a data background with offset it is [source value_1], for a function
# with 3 values it is [source value_1 value_2 value_3], etc.
source_param_lists = {
"constant": "backgroundParams",
"data": "data",
"function": "customFiles",
}
for i, background_data in enumerate(problem.contrastBackgroundParams):
background_type = problem.contrastBackgroundTypes[i]
# check source param is in range of the relevant parameter list
param_list = getattr(problem, source_param_lists[background_type])
source_index = background_data[0]
if not 0 < source_index <= len(param_list):
raise IndexError(
f'Entry {i} of contrastBackgroundParams has type "{background_type}" '
f"and source index {source_index}, "
f'which is outside the range of "{source_param_lists[background_type]}".'
)
# check value params are in range for background params
if len(background_data) > 1:
elements = [element for element in background_data[1:] if not 0 < element <= len(problem.backgroundParams)]
if elements:
raise IndexError(
f"Entry {i} of contrastBackgroundParams contains: {', '.join(str(i) for i in elements)}"
f', which lie{"s" * (len(elements) == 1)} outside of the range of "backgroundParams"',
)
def append_data_background(data: np.array, background: np.array) -> np.array:
"""Append background data to contrast data.
Parameters
----------
data : np.array
The contrast data to which we are appending a background.
background : np.array
The background data to append to the contrast.
Returns
-------
np.array
The contrast data with background data appended as two additional columns.
"""
if not np.allclose(data[:, 0], background[:, 0]):
raise ValueError("The q-values of the data and background must be equal.")
return np.hstack((data, np.zeros((data.shape[0], 4 - data.shape[1])), background[:, 1:]))
def make_controls(input_controls: ratapi.Controls) -> Control:
"""Convert the controls object to the format required by the compiled RAT code.
Parameters
----------
input_controls : RAT.Controls
The controls model, which defines algorithmic properties.
Returns
-------
controls : RAT.rat_core.Control
The controls object used in the compiled RAT code.
"""
controls = Control()
controls.procedure = input_controls.procedure
controls.parallel = input_controls.parallel
controls.calcSldDuringFit = input_controls.calcSldDuringFit
controls.resampleMinAngle = input_controls.resampleMinAngle
controls.resampleNPoints = input_controls.resampleNPoints
controls.display = input_controls.display
# Simplex
controls.xTolerance = input_controls.xTolerance
controls.funcTolerance = input_controls.funcTolerance
controls.maxFuncEvals = input_controls.maxFuncEvals
controls.maxIterations = input_controls.maxIterations
controls.updateFreq = input_controls.updateFreq
controls.updatePlotFreq = input_controls.updatePlotFreq
# DE
controls.populationSize = input_controls.populationSize
controls.fWeight = input_controls.fWeight
controls.crossoverProbability = input_controls.crossoverProbability
controls.strategy = int(input_controls.strategy) # RAT core expects strategy as an integer
controls.targetValue = input_controls.targetValue
controls.numGenerations = input_controls.numGenerations
# NS
controls.nLive = input_controls.nLive
controls.nMCMC = input_controls.nMCMC
controls.propScale = input_controls.propScale
controls.nsTolerance = input_controls.nsTolerance
# Dream
controls.nSamples = input_controls.nSamples
controls.nChains = input_controls.nChains
controls.jumpProbability = input_controls.jumpProbability
controls.pUnitGamma = input_controls.pUnitGamma
controls.boundHandling = input_controls.boundHandling
controls.adaptPCR = input_controls.adaptPCR
# IPC
controls.IPCFilePath = ""
controls.IPCFilePath = input_controls._IPCFilePath
return controls
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