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annotate orpg/mapper/base_msg.py @ 19:78407d627cba traipse_dev

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Beginning of Code Clean-up. Some code untested, may break!
author sirebral
date Sat, 25 Jul 2009 17:24:40 -0500
parents 4385a7d0efd1
children 072ffc1d466f
rev   line source
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1 # Copyright (C) 2000-2001 The OpenRPG Project
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2 #
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3 # openrpg-dev@lists.sourceforge.net
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4 #
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5 # This program is free software; you can redistribute it and/or modify
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6 # it under the terms of the GNU General Public License as published by
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7 # the Free Software Foundation; either version 2 of the License, or
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8 # (at your option) any later version.
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9 #
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10 # This program is distributed in the hope that it will be useful,
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11 # but WITHOUT ANY WARRANTY; without even the implied warranty of
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12 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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13 # GNU General Public License for more details.
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14 #
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15 # You should have received a copy of the GNU General Public License
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16 # along with this program; if not, write to the Free Software
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17 # Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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18 # --
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19 #
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20 # File: mapper/base_msg.py
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21 # Author: Chris Davis
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22 # Maintainer:
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23 # Version:
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24 # $Id: base_msg.py,v 1.9 2007/03/09 14:11:55 digitalxero Exp $
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25 #
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26 # Description:
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27 #
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28 __version__ = "$Id: base_msg.py,v 1.9 2007/03/09 14:11:55 digitalxero Exp $"
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29
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30 from threading import RLock
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31 from orpg.networking.mplay_client import *
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32
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33 class map_element_msg_base:
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34 # This is a base class
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35
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36 def __init__(self,reentrant_lock_object = None):
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37
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38 if not hasattr(self,"tagname"):
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39 raise Exception,
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40 "This is a virtual class that cannot be directly instantiated. Set self.tagname in derived class."
0
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41
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42 self._props = {}
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43 # This is a dictionary that holds (value,changed) 2-tuples, indexed by attribute
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44 # Avoid manipulating these values directly. Instead, use the provided accessor methods.
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45 # If there is not one that suits your needs, please add one to this class and
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46 # use it instead.
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47
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48 self.children = {}
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49 # This next clause will set self.p_lock to a passed-in RLock object, if present.
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50 # Otherwise, it will create it's very own for this instance.
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51 # Using a passed in object is useful to protect an entire <map/> element from
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52 # being changed by another thread when any part of it is being change by another
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53 # thread. Just pass the map_msg's p_lock object in to it's descendents.
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54 if reentrant_lock_object:
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55 self.p_lock = reentrant_lock_object
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56 else:
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57 self.p_lock = RLock()
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58
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59 def clear(self):
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60 self.p_lock.acquire()
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61
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62 for child in self.children.keys():
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63 self.children[child].clear()
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64 self.children[child] = None
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65 del self.children[child]
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66
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67 for p in self._props.keys():
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68 self._props[p] = None
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69
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70 self.p_lock.release()
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71
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72
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73 #########################################
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74 # Accessor functions begin
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75
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76 # Access single property
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77
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78 def init_prop(self,prop,value): # set's the changed flag to False and assigns
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79 self.p_lock.acquire()
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80 self._props[prop] = (value, 0)
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81 self.p_lock.release()
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82
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83 def set_prop(self,prop,value): # set's the changed flag to True and assigns
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84 self.p_lock.acquire()
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85 self._props[prop] = (value, 1)
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86 self.p_lock.release()
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87
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88 def get_prop(self,prop): # returns None if prop not found
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89 self.p_lock.acquire()
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90 if prop in self._props.keys():
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91 (p,c) = self._props[prop]
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92 self.p_lock.release()
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93 return p
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94 else:
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95 self.p_lock.release()
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96 return None
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97
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98 def is_prop_changed(self,prop): # returns None if prop not found
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99 self.p_lock_acquire()
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100 if prop in self._props.keys():
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101 (p,c) = self._props[prop]
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102 self.p_lock.release()
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103 return c
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104 else:
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105 self.p_lock.release()
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106 return None
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107
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108 def get_child(self,key): # returns None if key not found in children list
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109 self.p_lock_acquire()
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110 if self.children.has_key(key):
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111 self.p_lock.release()
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112 return self.children[key]
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113 else:
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114 self.p_lock.release()
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115 return None
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116
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117 # Access multiple properties
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118
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119 def init_props(self,props): # same as init_prop(), but takes dictionary of props
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120 self.p_lock.acquire()
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121 for k in props.keys():
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122 self._props[k] = (props[k],0)
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123 self.p_lock.release()
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124
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125 def set_props(self,props): # same as set_prop(), but takes dictionary of props
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126 self.p_lock.acquire()
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127 for k in props.keys():
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128 self._props[k] = (props[k],1)
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129 self.p_lock.release()
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130
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131 def get_all_props(self): # returns dictionary of all properties, regardless of change
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132 self.p_lock.acquire()
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133
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134 result = {}
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135 for k in self._props.keys():
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136 (p,c) = self._props[k]
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137 result[k] = p
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138
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139 self.p_lock.release()
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140 return result
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141
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142 def get_changed_props(self): # returns dictionary of all properties that have been changed
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143 self.p_lock.acquire()
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144 result = {}
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145 for k in self._props.keys():
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146 (p,c) = self._props[k]
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147 if c:
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148 result[k] = p
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149 self.p_lock.release()
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150 return result
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151
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152 def get_children(self): # returns dictionary of children
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153 return self.children
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154
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155
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156 # Accessor functions end
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157 #########################################
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158
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159 #########################################
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160 # XML emitters begin
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161 def get_all_xml(self,action="new",output_action = 0): # outputs a tag with all attributes it contains
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162 self.p_lock.acquire()
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163 xml_str = "<" + self.tagname
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164 if action and output_action:
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165 xml_str += " action='" + action + "'"
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166 for k in self._props.keys():
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167 (p,c) = self._props[k]
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168 if k != "action" or not action:
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169 xml_str += " " + k + "='" + p + "'"
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170 if self.children:
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171 xml_str += ">"
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172 for child in self.children.keys():
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173 xml_str += self.children[child].get_all_xml(action)
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174 xml_str += "</" + self.tagname + ">"
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175 else:
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176 xml_str += "/>"
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177 self.p_lock.release()
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178 return xml_str
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179
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180 def get_changed_xml(self,action="update",output_action = 0): # outputs a tag with all changed attributes
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181 self.p_lock.acquire()
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182 xml_str = "<" + self.tagname
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183 if action and output_action:
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184 xml_str += " action='" + action + "'"
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185
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186 # if present, always send the id, even if it didn't change
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187 if self._props.has_key("id"):
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188 (p,c) = self._props["id"]
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189 xml_str += " id='" + p + "'"
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190 for k in self._props.keys():
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191 (p,c) = self._props[k]
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192 if (k != "id" or k != "action") and c == 1: # don't duplicate the id attribute
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193 xml_str += " " + k + "='" + p + "'"
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194 if self.children:
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195 xml_str += ">"
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196 for child in self.children.keys():
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197 xml_str += self.children[child].get_changed_xml(action)
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198 xml_str += "</" + self.tagname + ">"
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199 else:
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200 xml_str += "/>"
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201 self.p_lock.release()
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202 return xml_str
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203
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204 # convenience method to use if only this tag is modified
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205 # outputs a <map/> element containing only the changes to this tag
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206 def standalone_update_text(self,update_id_string):
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207 buffer = "<map id='" + update_id_string + "'>"
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208 buffer += self.get_changed_xml("update")
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209 buffer += "<map/>"
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210 return buffer
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211
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212 # XML emitters end
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213 #########################################
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214
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215 #########################################
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216 # XML importers begin
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217
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218 def _from_dom(self,xml_dom,prop_func):
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219 self.p_lock.acquire()
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220 if xml_dom.tagName == self.tagname:
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221 if xml_dom.getAttributeKeys():
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222 for k in xml_dom.getAttributeKeys():
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223 prop_func(k,xml_dom.getAttribute(k))
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224 else:
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225 self.p_lock.release()
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226 raise Exception, "Error attempting to modify a " + self.tagname + " from a non-<" + self.tagname + "/> element"
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227 self.p_lock.release()
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228
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229 def init_from_dom(self,xml_dom):
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230 # xml_dom must be pointing to an empty tag. Override in a derived class for <map/> and other similar tags.
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231 self._from_dom(xml_dom,self.init_prop)
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232
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233 def set_from_dom(self,xml_dom):
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234 # xml_dom must be pointing to an empty tag. Override in a derived class for <map/> and other similar tags
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235 self._from_dom(xml_dom,self.set_prop)
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236
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237 def init_from_xml(self,xml):
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238 xml_dom = parseXml(xml)
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239 node_list = xml_dom.getElementsByTagName(self.tagname)
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240 if len(node_list) < 1:
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241 print "Warning: no <" + self.tagname + "/> elements found in DOM."
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242 else:
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243 while len(node_list):
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244 self.init_from_dom(node_list.pop())
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245 if xml_dom:
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246 xml_dom.unlink()
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247
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248 def set_from_xml(self,xml):
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249 xml_dom = parseXml(xml)
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250 node_list = xml_dom.getElementsByTagName(self.tagname)
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251 if len(node_list) < 1:
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252 print "Warning: no <" + self.tagname + "/> elements found in DOM."
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253 else:
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254 while len(node_list):
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255 self.set_from_dom(node_list.pop())
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256 if xml_dom:
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257 xml_dom.unlink()
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258
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259 # XML importers end
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260 #########################################