140 lines
4.5 KiB
Python
140 lines
4.5 KiB
Python
import xml.etree.ElementTree as eT
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import numpy as np
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import astropy.units as u
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import os
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import logging
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from ..lib.helpers import error
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from typing import Union
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import re
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class Entry(object):
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"""
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A class used to represent a configuration entry.
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Taken from ExoSim (https://github.com/ExoSim/ExoSimPublic)
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"""
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val: Union[str, bool, u.Quantity]
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def __init__(self, **kwargs):
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for key, value in kwargs.items():
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self.__setattr__(key, value)
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def __call__(self):
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return self.val if hasattr(self, "val") else None
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def parse(self, xml: eT.Element):
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"""
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Parse attributes of a XML element
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Parameters
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----------
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xml : xml.etree.ElementTree.Element
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XML element to parse the attributes from
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"""
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# Copy the XML attributes to object attributes
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for attrib in xml.attrib.keys():
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setattr(self, attrib, xml.attrib[attrib])
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# parse units
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attribs = list(xml.attrib.keys())
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units = list(filter(re.compile(".*_unit$").match, attribs))
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for unit in units:
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var = unit.replace("_unit", "")
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if hasattr(self, var):
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try:
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val = u.Quantity(list(map(float, getattr(self, var).split(','))), getattr(self, unit))
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if len(val) == 1:
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val = val[0]
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setattr(self, var, val)
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except (ValueError, LookupError):
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error("unable to convert units in entry '" + xml.tag + "': " + getattr(self, var) + " " +
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getattr(self, unit), exit_=False)
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# Convert boolean values
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if hasattr(self, "val") and type(self.val) == str and self.val.lower() in ["false", "true"]:
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self.val = (self.val.lower() == "true")
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class Configuration(object):
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"""
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A Class to parse the XML configuration file.
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Adapted from ExoSim (https://github.com/ExoSim/ExoSimPublic)
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Attributes
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----------
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conf : Entry
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Parsed configuration file as Entry-tree
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"""
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conf = None
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def __init__(self, file="esbo-etc_defaults.xml"):
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"""
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Parse a XML configuration file.
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Parameters
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----------
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file : str
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configuration file to parse
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"""
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# Check if configuration file exists
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if not os.path.exists(file):
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error("Configuration file '" + file + "' doesn't exist.")
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# Read configuration file
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logging.info("Reading configuration from file '" + file + "'.")
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self.conf = self.parser(eT.parse(file).getroot())
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self.calc_metaoptions()
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def parser(self, parent: eT.Element):
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"""
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Parse a XML element tree to an Entry-tree
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Parameters
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----------
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parent : xml.etree.ElementTree.Element
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The parent XML tree to be parsed
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Returns
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-------
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obj : Entry
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The parsed XML tree
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"""
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# Initialize empty Entry object
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obj = Entry()
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for child in parent:
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# recursively parse children of child element
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parsed_child = self.parser(child)
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# parse attributes of child element
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parsed_child.parse(child)
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# Add or append the parsed child to the prepared Entry object
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if hasattr(obj, child.tag):
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if isinstance(getattr(obj, child.tag), list):
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getattr(obj, child.tag).append(parsed_child)
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else:
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setattr(obj, child.tag, [getattr(obj, child.tag), parsed_child])
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else:
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setattr(obj, child.tag, parsed_child)
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return obj
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def calc_metaoptions(self):
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"""
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Calculate additional attributes e.g. the wavelength grid
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"""
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self.calc_metaoption_wl_delta()
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def calc_metaoption_wl_delta(self):
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"""
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Calculate the wavelength grid used for the calculations.
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"""
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if hasattr(self.conf.common, "wl_delta"):
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wl_delta = self.conf.common.wl_delta()
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else:
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wl_delta = self.conf.common.wl_min() / self.conf.common.res()
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setattr(self.conf.common, 'wl_bins',
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Entry(val=np.append(np.arange(self.conf.common.wl_min().to(u.nm).value,
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self.conf.common.wl_max().to(u.nm).value, wl_delta.to(u.nm).value),
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self.conf.common.wl_max().to(u.nm).value) << u.nm))
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