From db366e2e1ae2d7804166c41d6cb7dfda25ed8305 Mon Sep 17 00:00:00 2001
From: LukasK13 <spam.lukas.klass@gmail.com>
Date: Tue, 21 Apr 2020 10:29:02 +0200
Subject: [PATCH] Initial commit

---
 esbo_etc/classes/RadiantFactory.py | 80 ++++++++++++++++++++++++++++++
 1 file changed, 80 insertions(+)
 create mode 100644 esbo_etc/classes/RadiantFactory.py

diff --git a/esbo_etc/classes/RadiantFactory.py b/esbo_etc/classes/RadiantFactory.py
new file mode 100644
index 0000000..e1afc70
--- /dev/null
+++ b/esbo_etc/classes/RadiantFactory.py
@@ -0,0 +1,80 @@
+import astropy.units as u
+from .config import Entry
+from .IRadiant import IRadiant
+from ..classes import optical_component as oc
+from ..classes import target as tg
+from ..lib.helpers import error
+import copy
+import re
+
+
+class RadiantFactory:
+    """
+    A Factory creating objects of the type IRadiant
+    """
+
+    @u.quantity_input(wl_bins="length")
+    def __init__(self, wl_bins: u.Quantity):
+        """
+        Instantiate a new factory object
+
+        Parameters
+        ----------
+        wl_bins : Quantity
+            Wavelengths used for binning
+        """
+        self.__wl_bins = wl_bins
+
+    def create(self, options: Entry, parent: IRadiant = None) -> IRadiant:
+        """
+        Create a new object of the type IRadiant
+
+        Parameters
+        ----------
+        options : Entry
+            The options to be used as parameters for the instantiation of the new object.
+        parent : IRadiant
+            The optional parent element of the object (necessary for subclasses of AOpticalComponent).
+        Returns
+        -------
+        obj : IRadiant
+            The created object
+        """
+        if hasattr(options, "type"):
+            # Copy custom attributes of the Entry to a dictionary
+            attribs = copy.copy(vars(options))
+            # Remove unnecessary keys
+            for attrib in list(filter(re.compile(".*_unit$").match, attribs)) + ["comment", "type"]:
+                attribs.pop(attrib, None)
+            if parent is None:
+                # New component is of type target
+                attribs["wl_bins"] = self.__wl_bins
+                if options.type == "BlackBodyTarget":
+                    # Black Body Target
+                    if "mag" in attribs:
+                        attribs["mag"] = float(attribs["mag"]) * u.mag
+                    return tg.BlackBodyTarget(**attribs)
+                elif options.type == "FileTarget":
+                    # File Target
+                    return getattr(tg, options.type)(**attribs)
+                else:
+                    error("Unknown target type: '" + options.type + "'")
+            else:
+                # New component is of type Optical Component
+                attribs["parent"] = parent
+                class_ = getattr(oc, options.type)
+                if options.type in ["Atmosphere", "StrayLight", "Mirror", "Lens", "BeamSplitter"]:
+                    return class_(**attribs)
+                elif options.type == "Filter":
+                    if hasattr(options, "band"):
+                        return oc.Filter.fromBand(**attribs)
+                    elif hasattr(options, "transmittance"):
+                        return oc.Filter.fromFile(**attribs)
+                    elif hasattr(options, "start") and hasattr(options, "end"):
+                        return oc.Filter.fromRange(**attribs)
+                    else:
+                        error("Wrong parameters for filter.")
+                else:
+                    error("Unknown optical component type: '" + options.type + "'")
+        else:
+            error("Optical component needs to have a type specified.")