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| 1 # Copyright (c) 2012 Mitch Garnaat http://garnaat.org/ |
| 2 # Copyright (c) 2012 Amazon.com, Inc. or its affiliates. |
| 3 # All Rights Reserved |
| 4 # |
| 5 # Permission is hereby granted, free of charge, to any person obtaining a |
| 6 # copy of this software and associated documentation files (the |
| 7 # "Software"), to deal in the Software without restriction, including |
| 8 # without limitation the rights to use, copy, modify, merge, publish, dis- |
| 9 # tribute, sublicense, and/or sell copies of the Software, and to permit |
| 10 # persons to whom the Software is furnished to do so, subject to the fol- |
| 11 # lowing conditions: |
| 12 # |
| 13 # The above copyright notice and this permission notice shall be included |
| 14 # in all copies or substantial portions of the Software. |
| 15 # |
| 16 # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS |
| 17 # OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABIL- |
| 18 # ITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT |
| 19 # SHALL THE AUTHOR BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, |
| 20 # WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
| 21 # OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS |
| 22 # IN THE SOFTWARE. |
| 23 # |
| 24 |
| 25 import xml.sax |
| 26 |
| 27 |
| 28 def pythonize_name(name, sep='_'): |
| 29 s = '' |
| 30 if name[0].isupper: |
| 31 s = name[0].lower() |
| 32 for c in name[1:]: |
| 33 if c.isupper(): |
| 34 s += sep + c.lower() |
| 35 else: |
| 36 s += c |
| 37 return s |
| 38 |
| 39 |
| 40 class XmlHandler(xml.sax.ContentHandler): |
| 41 |
| 42 def __init__(self, root_node, connection): |
| 43 self.connection = connection |
| 44 self.nodes = [('root', root_node)] |
| 45 self.current_text = '' |
| 46 |
| 47 def startElement(self, name, attrs): |
| 48 self.current_text = '' |
| 49 t = self.nodes[-1][1].startElement(name, attrs, self.connection) |
| 50 if t != None: |
| 51 if isinstance(t, tuple): |
| 52 self.nodes.append(t) |
| 53 else: |
| 54 self.nodes.append((name, t)) |
| 55 |
| 56 def endElement(self, name): |
| 57 self.nodes[-1][1].endElement(name, self.current_text, self.connection) |
| 58 if self.nodes[-1][0] == name: |
| 59 self.nodes.pop() |
| 60 self.current_text = '' |
| 61 |
| 62 def characters(self, content): |
| 63 self.current_text += content |
| 64 |
| 65 def parse(self, s): |
| 66 xml.sax.parseString(s, self) |
| 67 |
| 68 |
| 69 class Element(dict): |
| 70 |
| 71 def __init__(self, connection=None, element_name=None, |
| 72 stack=None, parent=None, list_marker=None, |
| 73 item_marker=None, pythonize_name=False): |
| 74 dict.__init__(self) |
| 75 self.connection = connection |
| 76 self.element_name = element_name |
| 77 self.list_marker = list_marker or ['Set'] |
| 78 self.item_marker = item_marker or ['member', 'item'] |
| 79 if stack is None: |
| 80 self.stack = [] |
| 81 else: |
| 82 self.stack = stack |
| 83 self.pythonize_name = pythonize_name |
| 84 self.parent = parent |
| 85 |
| 86 def __getattr__(self, key): |
| 87 if key in self: |
| 88 return self[key] |
| 89 for k in self: |
| 90 e = self[k] |
| 91 if isinstance(e, Element): |
| 92 try: |
| 93 return getattr(e, key) |
| 94 except AttributeError: |
| 95 pass |
| 96 raise AttributeError |
| 97 |
| 98 def get_name(self, name): |
| 99 if self.pythonize_name: |
| 100 name = pythonize_name(name) |
| 101 return name |
| 102 |
| 103 def startElement(self, name, attrs, connection): |
| 104 self.stack.append(name) |
| 105 for lm in self.list_marker: |
| 106 if name.endswith(lm): |
| 107 l = ListElement(self.connection, name, self.list_marker, |
| 108 self.item_marker, self.pythonize_name) |
| 109 self[self.get_name(name)] = l |
| 110 return l |
| 111 if len(self.stack) > 0: |
| 112 element_name = self.stack[-1] |
| 113 e = Element(self.connection, element_name, self.stack, self, |
| 114 self.list_marker, self.item_marker, |
| 115 self.pythonize_name) |
| 116 self[self.get_name(element_name)] = e |
| 117 return (element_name, e) |
| 118 else: |
| 119 return None |
| 120 |
| 121 def endElement(self, name, value, connection): |
| 122 if len(self.stack) > 0: |
| 123 self.stack.pop() |
| 124 value = value.strip() |
| 125 if value: |
| 126 if isinstance(self.parent, Element): |
| 127 self.parent[self.get_name(name)] = value |
| 128 elif isinstance(self.parent, ListElement): |
| 129 self.parent.append(value) |
| 130 |
| 131 |
| 132 class ListElement(list): |
| 133 |
| 134 def __init__(self, connection=None, element_name=None, |
| 135 list_marker=['Set'], item_marker=('member', 'item'), |
| 136 pythonize_name=False): |
| 137 list.__init__(self) |
| 138 self.connection = connection |
| 139 self.element_name = element_name |
| 140 self.list_marker = list_marker |
| 141 self.item_marker = item_marker |
| 142 self.pythonize_name = pythonize_name |
| 143 |
| 144 def get_name(self, name): |
| 145 if self.pythonize_name: |
| 146 name = utils.pythonize_name(name) |
| 147 return name |
| 148 |
| 149 def startElement(self, name, attrs, connection): |
| 150 for lm in self.list_marker: |
| 151 if name.endswith(lm): |
| 152 l = ListElement(self.connection, name, |
| 153 self.list_marker, self.item_marker, |
| 154 self.pythonize_name) |
| 155 setattr(self, self.get_name(name), l) |
| 156 return l |
| 157 if name in self.item_marker: |
| 158 e = Element(self.connection, name, parent=self, |
| 159 list_marker=self.list_marker, |
| 160 item_marker=self.item_marker, |
| 161 pythonize_name=self.pythonize_name) |
| 162 self.append(e) |
| 163 return e |
| 164 else: |
| 165 return None |
| 166 |
| 167 def endElement(self, name, value, connection): |
| 168 if name == self.element_name: |
| 169 if len(self) > 0: |
| 170 empty = [] |
| 171 for e in self: |
| 172 if isinstance(e, Element): |
| 173 if len(e) == 0: |
| 174 empty.append(e) |
| 175 for e in empty: |
| 176 self.remove(e) |
| 177 else: |
| 178 setattr(self, self.get_name(name), value) |
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