Mercurial > repos > shellac > sam_consensus_v3
annotate env/lib/python3.9/site-packages/boto/sdb/db/manager/xmlmanager.py @ 0:4f3585e2f14b draft default tip
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
author | shellac |
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date | Mon, 22 Mar 2021 18:12:50 +0000 |
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1 # Copyright (c) 2006-2008 Mitch Garnaat http://garnaat.org/ |
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2 # |
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3 # Permission is hereby granted, free of charge, to any person obtaining a |
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4 # copy of this software and associated documentation files (the |
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5 # "Software"), to deal in the Software without restriction, including |
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6 # without limitation the rights to use, copy, modify, merge, publish, dis- |
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7 # tribute, sublicense, and/or sell copies of the Software, and to permit |
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8 # persons to whom the Software is furnished to do so, subject to the fol- |
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9 # lowing conditions: |
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10 # |
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11 # The above copyright notice and this permission notice shall be included |
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12 # in all copies or substantial portions of the Software. |
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13 # |
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14 # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS |
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15 # OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABIL- |
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16 # ITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT |
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17 # SHALL THE AUTHOR BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, |
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18 # WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
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19 # OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS |
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20 # IN THE SOFTWARE. |
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21 import boto |
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22 from boto.utils import find_class, Password |
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23 from boto.sdb.db.key import Key |
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24 from boto.sdb.db.model import Model |
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25 from boto.compat import six, encodebytes |
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26 from datetime import datetime |
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27 from xml.dom.minidom import getDOMImplementation, parse, parseString, Node |
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28 |
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29 ISO8601 = '%Y-%m-%dT%H:%M:%SZ' |
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30 |
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31 class XMLConverter(object): |
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32 """ |
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33 Responsible for converting base Python types to format compatible with underlying |
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34 database. For SimpleDB, that means everything needs to be converted to a string |
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35 when stored in SimpleDB and from a string when retrieved. |
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36 |
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37 To convert a value, pass it to the encode or decode method. The encode method |
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38 will take a Python native value and convert to DB format. The decode method will |
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39 take a DB format value and convert it to Python native format. To find the appropriate |
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40 method to call, the generic encode/decode methods will look for the type-specific |
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41 method by searching for a method called "encode_<type name>" or "decode_<type name>". |
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42 """ |
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43 def __init__(self, manager): |
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44 self.manager = manager |
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45 self.type_map = { bool : (self.encode_bool, self.decode_bool), |
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46 int : (self.encode_int, self.decode_int), |
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47 Model : (self.encode_reference, self.decode_reference), |
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48 Key : (self.encode_reference, self.decode_reference), |
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49 Password : (self.encode_password, self.decode_password), |
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50 datetime : (self.encode_datetime, self.decode_datetime)} |
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51 if six.PY2: |
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52 self.type_map[long] = (self.encode_long, self.decode_long) |
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53 |
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54 def get_text_value(self, parent_node): |
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55 value = '' |
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56 for node in parent_node.childNodes: |
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57 if node.nodeType == node.TEXT_NODE: |
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58 value += node.data |
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59 return value |
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60 |
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61 def encode(self, item_type, value): |
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62 if item_type in self.type_map: |
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63 encode = self.type_map[item_type][0] |
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64 return encode(value) |
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65 return value |
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66 |
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67 def decode(self, item_type, value): |
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68 if item_type in self.type_map: |
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69 decode = self.type_map[item_type][1] |
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70 return decode(value) |
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71 else: |
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72 value = self.get_text_value(value) |
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73 return value |
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74 |
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75 def encode_prop(self, prop, value): |
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76 if isinstance(value, list): |
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77 if hasattr(prop, 'item_type'): |
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78 new_value = [] |
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79 for v in value: |
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80 item_type = getattr(prop, "item_type") |
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81 if Model in item_type.mro(): |
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82 item_type = Model |
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83 new_value.append(self.encode(item_type, v)) |
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84 return new_value |
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85 else: |
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86 return value |
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87 else: |
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88 return self.encode(prop.data_type, value) |
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89 |
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90 def decode_prop(self, prop, value): |
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91 if prop.data_type == list: |
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92 if hasattr(prop, 'item_type'): |
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93 item_type = getattr(prop, "item_type") |
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94 if Model in item_type.mro(): |
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95 item_type = Model |
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96 values = [] |
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97 for item_node in value.getElementsByTagName('item'): |
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98 value = self.decode(item_type, item_node) |
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99 values.append(value) |
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100 return values |
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101 else: |
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102 return self.get_text_value(value) |
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103 else: |
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104 return self.decode(prop.data_type, value) |
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105 |
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106 def encode_int(self, value): |
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107 value = int(value) |
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108 return '%d' % value |
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109 |
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110 def decode_int(self, value): |
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111 value = self.get_text_value(value) |
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112 if value: |
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113 value = int(value) |
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114 else: |
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115 value = None |
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116 return value |
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117 |
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118 def encode_long(self, value): |
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119 value = long(value) |
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120 return '%d' % value |
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121 |
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122 def decode_long(self, value): |
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123 value = self.get_text_value(value) |
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124 return long(value) |
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125 |
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126 def encode_bool(self, value): |
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127 if value == True: |
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128 return 'true' |
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129 else: |
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130 return 'false' |
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131 |
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132 def decode_bool(self, value): |
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133 value = self.get_text_value(value) |
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134 if value.lower() == 'true': |
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135 return True |
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136 else: |
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137 return False |
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138 |
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139 def encode_datetime(self, value): |
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140 return value.strftime(ISO8601) |
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141 |
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142 def decode_datetime(self, value): |
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143 value = self.get_text_value(value) |
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144 try: |
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145 return datetime.strptime(value, ISO8601) |
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146 except: |
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147 return None |
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148 |
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149 def encode_reference(self, value): |
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150 if isinstance(value, six.string_types): |
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151 return value |
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152 if value is None: |
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153 return '' |
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154 else: |
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155 val_node = self.manager.doc.createElement("object") |
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156 val_node.setAttribute('id', value.id) |
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157 val_node.setAttribute('class', '%s.%s' % (value.__class__.__module__, value.__class__.__name__)) |
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158 return val_node |
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159 |
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160 def decode_reference(self, value): |
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161 if not value: |
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162 return None |
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163 try: |
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164 value = value.childNodes[0] |
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165 class_name = value.getAttribute("class") |
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166 id = value.getAttribute("id") |
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167 cls = find_class(class_name) |
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168 return cls.get_by_ids(id) |
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169 except: |
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170 return None |
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171 |
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172 def encode_password(self, value): |
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173 if value and len(value) > 0: |
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174 return str(value) |
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175 else: |
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176 return None |
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177 |
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178 def decode_password(self, value): |
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179 value = self.get_text_value(value) |
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180 return Password(value) |
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181 |
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182 |
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183 class XMLManager(object): |
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184 |
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185 def __init__(self, cls, db_name, db_user, db_passwd, |
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186 db_host, db_port, db_table, ddl_dir, enable_ssl): |
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187 self.cls = cls |
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188 if not db_name: |
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189 db_name = cls.__name__.lower() |
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190 self.db_name = db_name |
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191 self.db_user = db_user |
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192 self.db_passwd = db_passwd |
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193 self.db_host = db_host |
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194 self.db_port = db_port |
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195 self.db_table = db_table |
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196 self.ddl_dir = ddl_dir |
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197 self.s3 = None |
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198 self.converter = XMLConverter(self) |
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199 self.impl = getDOMImplementation() |
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200 self.doc = self.impl.createDocument(None, 'objects', None) |
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201 |
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202 self.connection = None |
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203 self.enable_ssl = enable_ssl |
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204 self.auth_header = None |
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205 if self.db_user: |
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206 base64string = encodebytes('%s:%s' % (self.db_user, self.db_passwd))[:-1] |
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207 authheader = "Basic %s" % base64string |
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208 self.auth_header = authheader |
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209 |
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210 def _connect(self): |
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211 if self.db_host: |
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212 if self.enable_ssl: |
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213 from httplib import HTTPSConnection as Connection |
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214 else: |
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215 from httplib import HTTPConnection as Connection |
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216 |
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217 self.connection = Connection(self.db_host, self.db_port) |
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218 |
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219 def _make_request(self, method, url, post_data=None, body=None): |
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220 """ |
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221 Make a request on this connection |
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222 """ |
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223 if not self.connection: |
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224 self._connect() |
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225 try: |
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226 self.connection.close() |
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227 except: |
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228 pass |
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229 self.connection.connect() |
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230 headers = {} |
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231 if self.auth_header: |
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232 headers["Authorization"] = self.auth_header |
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233 self.connection.request(method, url, body, headers) |
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234 resp = self.connection.getresponse() |
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235 return resp |
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236 |
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237 def new_doc(self): |
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238 return self.impl.createDocument(None, 'objects', None) |
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239 |
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240 def _object_lister(self, cls, doc): |
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241 for obj_node in doc.getElementsByTagName('object'): |
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242 if not cls: |
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243 class_name = obj_node.getAttribute('class') |
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244 cls = find_class(class_name) |
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245 id = obj_node.getAttribute('id') |
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246 obj = cls(id) |
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247 for prop_node in obj_node.getElementsByTagName('property'): |
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248 prop_name = prop_node.getAttribute('name') |
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249 prop = obj.find_property(prop_name) |
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250 if prop: |
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251 if hasattr(prop, 'item_type'): |
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252 value = self.get_list(prop_node, prop.item_type) |
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253 else: |
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254 value = self.decode_value(prop, prop_node) |
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255 value = prop.make_value_from_datastore(value) |
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256 setattr(obj, prop.name, value) |
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257 yield obj |
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258 |
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259 def reset(self): |
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260 self._connect() |
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261 |
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262 def get_doc(self): |
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263 return self.doc |
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264 |
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265 def encode_value(self, prop, value): |
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266 return self.converter.encode_prop(prop, value) |
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267 |
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268 def decode_value(self, prop, value): |
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269 return self.converter.decode_prop(prop, value) |
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270 |
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271 def get_s3_connection(self): |
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272 if not self.s3: |
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273 self.s3 = boto.connect_s3(self.aws_access_key_id, self.aws_secret_access_key) |
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274 return self.s3 |
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275 |
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276 def get_list(self, prop_node, item_type): |
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277 values = [] |
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278 try: |
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279 items_node = prop_node.getElementsByTagName('items')[0] |
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280 except: |
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281 return [] |
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282 for item_node in items_node.getElementsByTagName('item'): |
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283 value = self.converter.decode(item_type, item_node) |
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284 values.append(value) |
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285 return values |
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286 |
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287 def get_object_from_doc(self, cls, id, doc): |
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288 obj_node = doc.getElementsByTagName('object')[0] |
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289 if not cls: |
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290 class_name = obj_node.getAttribute('class') |
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291 cls = find_class(class_name) |
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292 if not id: |
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293 id = obj_node.getAttribute('id') |
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294 obj = cls(id) |
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295 for prop_node in obj_node.getElementsByTagName('property'): |
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296 prop_name = prop_node.getAttribute('name') |
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297 prop = obj.find_property(prop_name) |
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298 value = self.decode_value(prop, prop_node) |
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299 value = prop.make_value_from_datastore(value) |
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300 if value is not None: |
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301 try: |
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302 setattr(obj, prop.name, value) |
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303 except: |
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304 pass |
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305 return obj |
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306 |
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307 def get_props_from_doc(self, cls, id, doc): |
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308 """ |
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309 Pull out the properties from this document |
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310 Returns the class, the properties in a hash, and the id if provided as a tuple |
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311 :return: (cls, props, id) |
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312 """ |
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313 obj_node = doc.getElementsByTagName('object')[0] |
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314 if not cls: |
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315 class_name = obj_node.getAttribute('class') |
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316 cls = find_class(class_name) |
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317 if not id: |
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318 id = obj_node.getAttribute('id') |
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319 props = {} |
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320 for prop_node in obj_node.getElementsByTagName('property'): |
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321 prop_name = prop_node.getAttribute('name') |
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322 prop = cls.find_property(prop_name) |
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323 value = self.decode_value(prop, prop_node) |
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324 value = prop.make_value_from_datastore(value) |
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325 if value is not None: |
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326 props[prop.name] = value |
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327 return (cls, props, id) |
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328 |
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329 |
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330 def get_object(self, cls, id): |
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331 if not self.connection: |
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332 self._connect() |
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333 |
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334 if not self.connection: |
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335 raise NotImplementedError("Can't query without a database connection") |
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336 url = "/%s/%s" % (self.db_name, id) |
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337 resp = self._make_request('GET', url) |
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338 if resp.status == 200: |
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339 doc = parse(resp) |
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340 else: |
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341 raise Exception("Error: %s" % resp.status) |
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342 return self.get_object_from_doc(cls, id, doc) |
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343 |
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344 def query(self, cls, filters, limit=None, order_by=None): |
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345 if not self.connection: |
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346 self._connect() |
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347 |
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348 if not self.connection: |
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349 raise NotImplementedError("Can't query without a database connection") |
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350 |
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351 from urllib import urlencode |
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352 |
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353 query = str(self._build_query(cls, filters, limit, order_by)) |
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354 if query: |
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355 url = "/%s?%s" % (self.db_name, urlencode({"query": query})) |
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356 else: |
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357 url = "/%s" % self.db_name |
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358 resp = self._make_request('GET', url) |
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359 if resp.status == 200: |
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360 doc = parse(resp) |
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361 else: |
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362 raise Exception("Error: %s" % resp.status) |
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363 return self._object_lister(cls, doc) |
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364 |
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365 def _build_query(self, cls, filters, limit, order_by): |
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366 import types |
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367 if len(filters) > 4: |
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368 raise Exception('Too many filters, max is 4') |
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369 parts = [] |
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370 properties = cls.properties(hidden=False) |
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371 for filter, value in filters: |
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372 name, op = filter.strip().split() |
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373 found = False |
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374 for property in properties: |
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375 if property.name == name: |
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376 found = True |
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377 if types.TypeType(value) == list: |
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378 filter_parts = [] |
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379 for val in value: |
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380 val = self.encode_value(property, val) |
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381 filter_parts.append("'%s' %s '%s'" % (name, op, val)) |
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382 parts.append("[%s]" % " OR ".join(filter_parts)) |
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383 else: |
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384 value = self.encode_value(property, value) |
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385 parts.append("['%s' %s '%s']" % (name, op, value)) |
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386 if not found: |
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387 raise Exception('%s is not a valid field' % name) |
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388 if order_by: |
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389 if order_by.startswith("-"): |
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390 key = order_by[1:] |
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391 type = "desc" |
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392 else: |
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393 key = order_by |
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394 type = "asc" |
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395 parts.append("['%s' starts-with ''] sort '%s' %s" % (key, key, type)) |
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396 return ' intersection '.join(parts) |
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397 |
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398 def query_gql(self, query_string, *args, **kwds): |
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399 raise NotImplementedError("GQL queries not supported in XML") |
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400 |
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401 def save_list(self, doc, items, prop_node): |
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402 items_node = doc.createElement('items') |
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403 prop_node.appendChild(items_node) |
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404 for item in items: |
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405 item_node = doc.createElement('item') |
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406 items_node.appendChild(item_node) |
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407 if isinstance(item, Node): |
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408 item_node.appendChild(item) |
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409 else: |
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410 text_node = doc.createTextNode(item) |
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411 item_node.appendChild(text_node) |
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412 |
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413 def save_object(self, obj, expected_value=None): |
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414 """ |
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415 Marshal the object and do a PUT |
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416 """ |
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417 doc = self.marshal_object(obj) |
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418 if obj.id: |
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419 url = "/%s/%s" % (self.db_name, obj.id) |
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420 else: |
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421 url = "/%s" % (self.db_name) |
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422 resp = self._make_request("PUT", url, body=doc.toxml()) |
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423 new_obj = self.get_object_from_doc(obj.__class__, None, parse(resp)) |
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424 obj.id = new_obj.id |
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425 for prop in obj.properties(): |
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426 try: |
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427 propname = prop.name |
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428 except AttributeError: |
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429 propname = None |
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430 if propname: |
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431 value = getattr(new_obj, prop.name) |
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432 if value: |
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433 setattr(obj, prop.name, value) |
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434 return obj |
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435 |
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436 |
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437 def marshal_object(self, obj, doc=None): |
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438 if not doc: |
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439 doc = self.new_doc() |
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440 if not doc: |
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441 doc = self.doc |
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442 obj_node = doc.createElement('object') |
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443 |
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444 if obj.id: |
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445 obj_node.setAttribute('id', obj.id) |
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446 |
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447 obj_node.setAttribute('class', '%s.%s' % (obj.__class__.__module__, |
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448 obj.__class__.__name__)) |
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449 root = doc.documentElement |
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450 root.appendChild(obj_node) |
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451 for property in obj.properties(hidden=False): |
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452 prop_node = doc.createElement('property') |
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453 prop_node.setAttribute('name', property.name) |
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454 prop_node.setAttribute('type', property.type_name) |
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455 value = property.get_value_for_datastore(obj) |
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456 if value is not None: |
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457 value = self.encode_value(property, value) |
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458 if isinstance(value, list): |
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459 self.save_list(doc, value, prop_node) |
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460 elif isinstance(value, Node): |
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461 prop_node.appendChild(value) |
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462 else: |
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463 text_node = doc.createTextNode(six.text_type(value).encode("ascii", "ignore")) |
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464 prop_node.appendChild(text_node) |
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465 obj_node.appendChild(prop_node) |
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466 |
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467 return doc |
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468 |
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469 def unmarshal_object(self, fp, cls=None, id=None): |
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470 if isinstance(fp, six.string_types): |
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471 doc = parseString(fp) |
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472 else: |
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473 doc = parse(fp) |
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474 return self.get_object_from_doc(cls, id, doc) |
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475 |
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476 def unmarshal_props(self, fp, cls=None, id=None): |
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477 """ |
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478 Same as unmarshalling an object, except it returns |
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479 from "get_props_from_doc" |
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480 """ |
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481 if isinstance(fp, six.string_types): |
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482 doc = parseString(fp) |
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483 else: |
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484 doc = parse(fp) |
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485 return self.get_props_from_doc(cls, id, doc) |
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486 |
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487 def delete_object(self, obj): |
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488 url = "/%s/%s" % (self.db_name, obj.id) |
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489 return self._make_request("DELETE", url) |
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490 |
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491 def set_key_value(self, obj, name, value): |
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492 self.domain.put_attributes(obj.id, {name: value}, replace=True) |
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493 |
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494 def delete_key_value(self, obj, name): |
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495 self.domain.delete_attributes(obj.id, name) |
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496 |
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497 def get_key_value(self, obj, name): |
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498 a = self.domain.get_attributes(obj.id, name) |
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499 if name in a: |
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500 return a[name] |
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501 else: |
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502 return None |
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503 |
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504 def get_raw_item(self, obj): |
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505 return self.domain.get_item(obj.id) |
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506 |
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507 def set_property(self, prop, obj, name, value): |
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508 pass |
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509 |
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510 def get_property(self, prop, obj, name): |
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511 pass |
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512 |
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513 def load_object(self, obj): |
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514 if not obj._loaded: |
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515 obj = obj.get_by_id(obj.id) |
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516 obj._loaded = True |
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517 return obj |