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""" |
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Common functions for building CPEs |
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3
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""" |
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4
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5
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2 |
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from __future__ import absolute_import |
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2 |
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from __future__ import print_function |
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7
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8
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9
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2 |
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def extract_subelement(objects, sub_elem_type): |
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10
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""" |
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11
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From a collection of element objects, return the value of |
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12
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the first attribute of name sub_elem_type found. |
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13
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14
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This is useful when the object is a single element and |
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15
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we wish to query some external reference identifier |
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16
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in the subtree of that element. |
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17
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""" |
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18
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19
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2 |
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for obj in objects: |
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# decide on usage of .iter or .getiterator method of elementtree class. |
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# getiterator is deprecated in Python 3.9, but iter is not available in |
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22
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# older versions |
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23
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2 |
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if getattr(obj, "iter", None) == None: |
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24
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obj_iterator = obj.getiterator() |
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25
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else: |
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26
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2 |
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obj_iterator = obj.iter() |
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27
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2 |
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for subelement in obj_iterator: |
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28
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2 |
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if subelement.get(sub_elem_type): |
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2 |
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sub_element = subelement.get(sub_elem_type) |
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30
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return sub_element |
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31
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32
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33
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2 |
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def extract_env_obj(objects, local_var): |
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34
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""" |
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35
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From a collection of objects, return the object with id matching |
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36
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the object_ref of the local variable. |
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37
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""" |
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38
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39
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2 |
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for obj in objects: |
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40
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2 |
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env_id = extract_subelement(local_var, 'object_ref') |
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41
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2 |
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if env_id == obj.get('id'): |
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2 |
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return obj |
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43
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44
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45
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2 |
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def extract_referred_nodes(tree_with_refs, tree_with_ids, attrname): |
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46
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""" |
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47
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Return the elements in tree_with_ids which are referenced |
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48
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from tree_with_refs via the element attribute 'attrname'. |
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49
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""" |
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50
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51
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2 |
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reflist = [] |
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52
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2 |
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elementlist = [] |
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53
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54
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55
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# decide on usage of .iter or .getiterator method of elementtree class. |
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56
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# getiterator is deprecated in Python 3.9, but iter is not available in |
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57
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# older versions |
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58
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2 |
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if getattr(tree_with_refs, "iter", None) == None: |
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59
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tree_with_refs_iterator = tree_with_refs.getiterator() |
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60
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else: |
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61
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2 |
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tree_with_refs_iterator = tree_with_refs.iter() |
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62
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2 |
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for element in tree_with_refs_iterator: |
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63
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2 |
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value = element.get(attrname) |
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64
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2 |
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if value is not None: |
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65
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2 |
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reflist.append(value) |
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66
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67
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# decide on usage of .iter or .getiterator method of elementtree class. |
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68
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# getiterator is deprecated in Python 3.9, but iter is not available in |
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69
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# older versions |
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70
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2 |
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if getattr(tree_with_ids, "iter", None) == None: |
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71
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tree_with_ids_iterator = tree_with_ids.getiterator() |
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72
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else: |
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73
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2 |
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tree_with_ids_iterator = tree_with_ids.iter() |
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74
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2 |
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for element in tree_with_ids_iterator: |
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75
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2 |
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if element.get("id") in reflist: |
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76
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2 |
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elementlist.append(element) |
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77
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78
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return elementlist |
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79
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ComplianceAsCode /
content
