1 | #!/usr/bin/env python |
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2 | |
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3 | #************************************************************************* |
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4 | # Copyright (c) 2009 The University of Chicago, as Operator of Argonne |
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5 | # National Laboratory. |
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6 | # Copyright (c) 2009 The Regents of the University of California, as |
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7 | # Operator of Los Alamos National Laboratory. |
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8 | # This file is distributed subject to a Software License Agreement found |
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9 | # in the file LICENSE that is included with this distribution. |
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10 | #************************************************************************* |
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11 | |
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12 | '''@note: watch EPICS process variables and write them to an XML file |
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13 | |
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14 | @version: |
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15 | ########### SVN repository information ################### |
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16 | # $Date: 2009-11-06 16:35:02 +0000 (Fri, 06 Nov 2009) $ |
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17 | # $Author: jemian $ |
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18 | # $Revision: 79 $ |
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19 | # $URL$ |
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20 | # $Id: epics2xml.py 79 2009-11-06 16:35:02Z jemian $ |
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21 | ########### SVN repository information ################### |
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22 | |
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23 | @note: for help with xml.dom, see http://docs.python.org/library/xml.dom.html |
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24 | ''' |
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25 | |
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26 | |
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27 | from xml.dom import minidom |
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28 | import datetime |
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29 | #import copy |
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30 | #import pvConnect |
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31 | |
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32 | |
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33 | class Epics2Xml: |
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34 | '''watch PVs and write to XMl''' |
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35 | |
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36 | def __init__(self, configFile=None): |
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37 | '''prepare the settings file |
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38 | @param configFile: [string] name of XML file with settings''' |
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39 | self.rootElement = 'epics2xml' |
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40 | self.Clear() |
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41 | self.SetConfigFile(configFile) |
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42 | |
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43 | def GetDb(self): |
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44 | '''@return: database''' |
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45 | return self.db |
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46 | |
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47 | def GetConfigFile(self): |
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48 | '''@return: name of XML configuration file''' |
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49 | return self.configFile |
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50 | |
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51 | def SetConfigFile(self, thefile): |
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52 | '''set the name of XML configuration file |
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53 | @param thefile: [string] name of XML file with the configuration''' |
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54 | self.configFile = thefile |
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55 | |
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56 | def Clear(self): |
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57 | '''reset the internal data representation (db) to empty''' |
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58 | self.db = {} |
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59 | |
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60 | def ReadConfigFile(self): |
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61 | '''read the configuration from a file into an internal dictionary (self.db) |
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62 | |
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63 | @note: this method uses xml.dom.minidom (built into all Pythons) |
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64 | @see: http://docs.python.org/library/xml.dom.minidom.html |
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65 | ''' |
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66 | try: |
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67 | doc = minidom.parse(self.configFile) # parse an XML file by name |
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68 | assert doc.documentElement.tagName == self.rootElement |
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69 | except IOError: |
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70 | return 'Could not read the XML file: ' + self.configFile |
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71 | except AssertionError: |
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72 | return 'XML root element is not ' + self.rootElement |
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73 | #... read all attributes from the root element |
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74 | docElem = doc.documentElement |
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75 | self.Clear() |
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76 | version = self._get_attribute(docElem, "version", "not-specified") |
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77 | try: |
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78 | # only handle v1.0 resource configuration files |
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79 | assert version == u'1.0' |
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80 | except AssertionError: |
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81 | doc.unlink() |
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82 | return 'Cannot handle file version:', version |
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83 | # file verified now |
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84 | |
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85 | def ReadXmlFile(self): |
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86 | '''read the settings from a file into an internal dictionary (self.db) |
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87 | |
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88 | @note: this method uses xml.dom.minidom (built into all Pythons) |
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89 | @see: http://docs.python.org/library/xml.dom.minidom.html |
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90 | ''' |
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91 | try: |
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92 | doc = minidom.parse(self.configFile) # parse an XML file by name |
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93 | assert doc.documentElement.tagName == self.rootElement |
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94 | except IOError: |
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95 | return 'Could not read the XML file: ' + self.configFile |
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96 | except AssertionError: |
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97 | return 'XML root element is not ' + self.rootElement |
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98 | #... read all attributes from the root element |
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99 | docElem = doc.documentElement |
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100 | self.Clear() |
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101 | version = self._get_attribute(docElem, "version", "not-specified") |
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102 | try: |
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103 | # only handle v1.0 resource configuration files |
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104 | assert version == u'1.0' |
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105 | except AssertionError: |
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106 | doc.unlink() |
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107 | return 'Cannot handle file version:', version |
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108 | # file verified now |
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109 | for pairNode in docElem.getElementsByTagName("XYpair"): |
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110 | title = self._get_attribute(pairNode, "name", "") |
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111 | selected = self._get_attribute(pairNode, "selected", "") |
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112 | pairnum = self.NewPair(title) |
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113 | if selected.lower() == "true": |
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114 | self.SelectPair(pairnum) |
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115 | self.NewEpicsConfig(pairnum) |
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116 | for EpicsNode in pairNode.getElementsByTagName("EPICS_configuration"): |
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117 | for axisNode in EpicsNode.getElementsByTagName("axis"): |
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118 | axis = self._get_attribute(axisNode, "name", "") |
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119 | #isMotorRec |
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120 | for flagNode in axisNode.getElementsByTagName("flag"): |
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121 | text = self._get_attribute(flagNode, "isMotorRec", "False") |
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122 | self.SetEpicsField(pairnum, axis, "isMotorRec", (text == "True")) |
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123 | for fieldNode in axisNode.getElementsByTagName("field"): |
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124 | name = self._get_attribute(fieldNode, "name", "") |
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125 | pv = self._get_attribute(fieldNode, "pv", "") |
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126 | if (len(name)>0) and (len(pv)>0): |
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127 | #print pairnum, axis, name, pv |
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128 | self.SetEpicsField(pairnum, axis, name, pv) |
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129 | for tabNode in pairNode.getElementsByTagName("tab"): |
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130 | title = self._get_attribute(tabNode, "name", "") |
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131 | selected = self._get_attribute(tabNode, "selected", "") |
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132 | tabnum = self.NewTab(pairnum, title) |
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133 | if selected.lower() == "true": |
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134 | self.SelectTab(pairnum, tabnum) |
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135 | # EPICS settings here |
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136 | for rowNode in tabNode.getElementsByTagName("row"): |
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137 | title = self._get_attribute(rowNode, "name", "") |
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138 | selected = self._get_attribute(rowNode, "selected", "") |
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139 | x = self._get_attribute(rowNode, "x", "") |
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140 | y = self._get_attribute(rowNode, "y", "") |
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141 | rownum = self.NewRow(pairnum, tabnum, title) |
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142 | self.SetRowXY(pairnum, tabnum, rownum, x, y) |
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143 | doc.unlink() # ensures XML document is disposed cleanly |
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144 | return None |
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145 | |
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146 | def _get_attribute(self, node, key, default): |
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147 | '''get a specific attribute or return the default |
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148 | @param node: XML Node object |
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149 | @param key: [string] name of attribute to find |
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150 | @param default: [string] default value to return''' |
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151 | value = default |
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152 | if node.attributes.has_key(key): |
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153 | value = node.attributes[key].value |
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154 | return value |
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155 | |
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156 | def SaveXmlFile(self): |
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157 | '''save the internal dictionary (self.db) to an XML file |
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158 | @note: What about using/saving a default stylesheet? |
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159 | @see: http://www.boddie.org.uk/python/XML_intro.html |
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160 | ''' |
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161 | out = open(self.configFile, 'w') |
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162 | out.write(repr(self)) |
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163 | out.close() |
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164 | # |
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165 | # What about a default stylesheet? |
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166 | # |
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167 | |
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168 | return 'Saved settings to ' + self.configFile |
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169 | |
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170 | def _SetAttr(self, node, attribute, value): |
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171 | '''add attributes that are not empty (but do not strip the whitespace) |
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172 | @param node: XML Node object |
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173 | @param attribute: [string] name of attribute |
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174 | @param value: [string] value of attribute''' |
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175 | if len(value) > 0: |
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176 | node.setAttribute(attribute, value) |
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177 | |
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178 | def _makeTextNode(self, doc, tag, value): |
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179 | '''create a text node for the XML file |
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180 | @param doc: [xml.dom.minidom documentElement object] |
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181 | @param tag: [string] element name |
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182 | @param value: [string] element text''' |
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183 | node = doc.createElement(tag) |
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184 | text = doc.createTextNode(value) |
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185 | node.appendChild(text) |
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186 | return node |
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187 | |
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188 | def __repr__(self): |
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189 | '''default representation of this structure is XML |
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190 | @return: XML representation of internal database (db) |
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191 | @note: What about a default stylesheet? |
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192 | ''' |
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193 | t = datetime.datetime.now() |
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194 | yyyymmdd = t.strftime("%Y-%m-%d") |
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195 | hhmmss = t.strftime("%H:%M:%S") |
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196 | |
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197 | # Create the minidom document |
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198 | doc = minidom.Document() |
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199 | |
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200 | # Create the root element |
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201 | root = doc.createElement(self.rootElement) |
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202 | self._SetAttr(root, "version", "1.0") |
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203 | self._SetAttr(root, "date", yyyymmdd) |
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204 | self._SetAttr(root, "time", hhmmss) |
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205 | doc.appendChild(root) |
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206 | # selectedpairnum = self.GetSelectedPair() |
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207 | # for pairnum in range(self.CountPairs()): |
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208 | # pairnode = doc.createElement("XYpair") |
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209 | # self._SetAttr(pairnode, "name", |
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210 | # self.GetPairTitle(pairnum)) |
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211 | # if selectedpairnum == pairnum: |
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212 | # self._SetAttr(pairnode, "selected", "True") |
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213 | # if self.db[u"pairs"][pairnum].has_key(u"epics"): |
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214 | # epicsnode = doc.createElement("EPICS_configuration") |
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215 | # epicsdb = self.db[u"pairs"][pairnum][u"epics"] |
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216 | # for axis in epicsdb: |
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217 | # axisnode = doc.createElement("axis") |
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218 | # self._SetAttr(axisnode, "name", axis) |
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219 | # field = "isMotorRec" |
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220 | # node = doc.createElement("flag") |
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221 | # self._SetAttr(node, field, str(epicsdb[axis][field])) |
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222 | # axisnode.appendChild(node) |
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223 | # for field in wxmtxy_axis.field_list: |
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224 | # if len(epicsdb[axis][field])>0: |
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225 | # node = doc.createElement("field") |
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226 | # self._SetAttr(node, "name", field) |
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227 | # self._SetAttr(node, "pv", str(epicsdb[axis][field])) |
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228 | # axisnode.appendChild(node) |
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229 | # epicsnode.appendChild(axisnode) |
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230 | # pairnode.appendChild(epicsnode) |
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231 | # selectedtabnum = self.GetSelectedTab(pairnum) |
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232 | # for tabnum in range(self.CountTabs(pairnum)): |
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233 | # tabnode = doc.createElement("tab") |
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234 | # self._SetAttr(tabnode, "name", self.GetTabTitle(pairnum, tabnum)) |
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235 | # if selectedtabnum == tabnum: |
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236 | # self._SetAttr(tabnode, "selected", "True") |
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237 | # selectedrownum = self.GetSelectedRow(pairnum, tabnum) |
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238 | # for rownum in range(self.CountRows(pairnum, tabnum)): |
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239 | # rownode = doc.createElement("row") |
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240 | # label = self.GetRowTitle(pairnum, tabnum, rownum) |
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241 | # x, y = self.GetRowXY(pairnum, tabnum, rownum) |
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242 | # self._SetAttr(rownode, "name", label) |
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243 | # self._SetAttr(rownode, "x", x) |
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244 | # self._SetAttr(rownode, "y", y) |
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245 | # if selectedrownum == rownum: |
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246 | # self._SetAttr(rownode, "selected", "True") |
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247 | # tabnode.appendChild(rownode) |
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248 | # pairnode.appendChild(tabnode) |
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249 | # root.appendChild(pairnode) |
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250 | return doc.toprettyxml(indent=" ") |
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251 | |
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252 | |
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253 | if __name__ == '__main__': |
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254 | cf = Epics2Xml("config.xml") |
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255 | cf.ReadConfigFile() |
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256 | # rc = Settings("examples/test-settings.xml") |
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257 | # rc.ReadXmlFile() |
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258 | # rc.SetConfigFile('output-test.xml') |
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259 | # rc.SaveXmlFile() |
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260 | # |
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261 | # pj = Settings() |
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262 | # pairnum = pj.NewPair("my test pair") |
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263 | # tabnum = pj.NewTab(pairnum, title='my test tab') |
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264 | # tabnum = pj.NewTab(pairnum, title='another') |
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265 | # pj.SelectTab(pairnum, tabnum) |
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266 | # tabnum = pj.NewTab(pairnum, title='another') |
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267 | # tabnum = pj.NewTab(pairnum, title='another') |
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268 | # pairnum = pj.NewPair("another") |
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269 | # pj.SelectPair(pairnum) |
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270 | # tabnum = pj.NewTab(pairnum, title='another') |
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271 | # rownum = pj.NewRow(pairnum, tabnum, "beam center") |
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272 | # pj.SelectRow(pairnum, tabnum, rownum) |
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273 | # tabnum = pj.NewTab(pairnum, title='another') |
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274 | # pairnum = pj.NewPair("another") |
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275 | # print str(pj) |
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276 | print "Hello" |
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