From 4621453bb753f17614b8ac4b6314a142ecbe278c Mon Sep 17 00:00:00 2001
From: Willem Jan Palenstijn <Willem.Jan.Palenstijn@cwi.nl>
Date: Thu, 3 Dec 2015 15:14:25 +0100
Subject: Reduce dependency of python code on libastra

---
 python/astra/utils.pyx | 82 +++++++++++++++++++++++++++++++++++++++++++++++---
 1 file changed, 77 insertions(+), 5 deletions(-)

(limited to 'python')

diff --git a/python/astra/utils.pyx b/python/astra/utils.pyx
index 9871ac6..07727ce 100644
--- a/python/astra/utils.pyx
+++ b/python/astra/utils.pyx
@@ -29,8 +29,13 @@
 cimport numpy as np
 import numpy as np
 import six
+if six.PY3:
+    import builtins
+else:
+    import __builtin__
 from libcpp.string cimport string
 from libcpp.vector cimport vector
+from libcpp.list cimport list
 from cython.operator cimport dereference as deref, preincrement as inc
 from cpython.version cimport PY_MAJOR_VERSION
 
@@ -39,9 +44,6 @@ from .PyXMLDocument cimport XMLDocument
 from .PyXMLDocument cimport XMLNode
 from .PyIncludes cimport *
 
-cdef extern from "astra/PluginAlgorithm.h" namespace "astra":
-    object XMLNode2dict(XMLNode)
-
 
 cdef Config * dictToConfig(string rootname, dc):
     cdef Config * cfg = new Config()
@@ -93,7 +95,7 @@ cdef void readDict(XMLNode root, _dc):
     dc = convert_item(_dc)
     for item in dc:
         val = dc[item]
-        if isinstance(val, list) or isinstance(val, tuple):
+        if isinstance(val, __builtins__.list) or isinstance(val, tuple):
             val = np.array(val,dtype=np.float64)
         if isinstance(val, np.ndarray):
             if val.size == 0:
@@ -129,7 +131,7 @@ cdef void readOptions(XMLNode node, dc):
         val = dc[item]
         if node.hasOption(item):
             raise Exception('Duplicate Option: %s' % item)
-        if isinstance(val, list) or isinstance(val, tuple):
+        if isinstance(val, __builtins__.list) or isinstance(val, tuple):
             val = np.array(val,dtype=np.float64)
         if isinstance(val, np.ndarray):
             if val.size == 0:
@@ -149,3 +151,73 @@ cdef void readOptions(XMLNode node, dc):
 
 cdef configToDict(Config *cfg):
     return XMLNode2dict(cfg.self)
+
+def castString3(input):
+    return input.decode('utf-8')
+
+def castString2(input):
+    return input
+
+if six.PY3:
+    castString = castString3
+else:
+    castString = castString2
+
+def stringToPythonValue(inputIn):
+    input = castString(inputIn)
+    # matrix
+    if ';' in input:
+        row_strings = input.split(';')
+        col_strings = row_strings[0].split(',')
+        nRows = len(row_strings)
+        nCols = len(col_strings)
+
+        out = np.empty((nRows,nCols))
+        for ridx, row in enumerate(row_strings):
+            col_strings = row.split(',')
+            for cidx, col in enumerate(col_strings):
+                out[ridx,cidx] = float(col)
+        return out
+
+    # vector
+    if ',' in input:
+        items = input.split(',')
+        out = np.empty(len(items))
+        for idx,item in enumerate(items):
+            out[idx] = float(item)
+        return out
+
+    try:
+        # integer
+        return int(input)
+    except ValueError:
+        try:
+            #float
+            return float(input)
+        except ValueError:
+            # string
+            return str(input)
+
+
+cdef XMLNode2dict(XMLNode node):
+    cdef XMLNode subnode
+    cdef list[XMLNode] nodes
+    cdef list[XMLNode].iterator it
+    dct = {}
+    opts = {}
+    if node.hasAttribute(six.b('type')):
+        dct['type'] = castString(node.getAttribute(six.b('type')))
+    nodes = node.getNodes()
+    it = nodes.begin()
+    while it != nodes.end():
+        subnode = deref(it)
+        if castString(subnode.getName())=="Option":
+            if subnode.hasAttribute('value'):
+                opts[castString(subnode.getAttribute('key'))] = stringToPythonValue(subnode.getAttribute('value'))
+            else:
+                opts[castString(subnode.getAttribute('key'))] = stringToPythonValue(subnode.getContent())
+        else:
+            dct[castString(subnode.getName())] = stringToPythonValue(subnode.getContent())
+        inc(it)
+    if len(opts)>0: dct['options'] = opts
+    return dct
-- 
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