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util/datamapper.lua @ 12927:918dfbb330fd
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E.g. module:info("http") with many http modules loaded would show a lot
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author | Kim Alvefur <zash@zash.se> |
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date | Fri, 10 Mar 2023 12:33:02 +0100 |
parent | 12782:8815d3090928 |
child | 12975:d10957394a3c |
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1 -- This file is generated from teal-src/util/datamapper.lua |
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2 |
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3 if not math.type then |
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4 require("util.mathcompat") |
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5 end |
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6 |
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7 local st = require("util.stanza"); |
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8 local pointer = require("util.jsonpointer"); |
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9 |
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10 local schema_t = {} |
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11 |
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12 local function toboolean(s) |
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13 if s == "true" or s == "1" then |
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14 return true |
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15 elseif s == "false" or s == "0" then |
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16 return false |
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17 elseif s then |
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18 return true |
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19 end |
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20 end |
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21 |
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22 local function totype(t, s) |
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23 if not s then |
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24 return nil |
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25 end |
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26 if t == "string" then |
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27 return s |
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28 elseif t == "boolean" then |
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29 return toboolean(s) |
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30 elseif t == "number" or t == "integer" then |
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31 return tonumber(s) |
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32 end |
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33 end |
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34 |
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35 local value_goes = {} |
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36 |
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37 local function resolve_schema(schema, root) |
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38 if type(schema) == "table" then |
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39 if schema["$ref"] and schema["$ref"]:sub(1, 1) == "#" then |
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40 return pointer.resolve(root, schema["$ref"]:sub(2)) |
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41 end |
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42 end |
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43 return schema |
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44 end |
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45 |
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46 local function guess_schema_type(schema) |
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47 local schema_types = schema.type |
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48 if type(schema_types) == "string" then |
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49 return schema_types |
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50 elseif schema_types ~= nil then |
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51 error("schema has unsupported 'type' property") |
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52 elseif schema.properties then |
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53 return "object" |
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54 elseif schema.items then |
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55 return "array" |
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56 end |
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57 return "string" |
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58 end |
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59 |
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60 local function unpack_propschema(propschema, propname, current_ns) |
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61 |
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62 local proptype = "string" |
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63 local value_where = propname and "in_text_tag" or "in_text" |
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64 local name = propname |
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65 local namespace |
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66 local prefix |
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67 local single_attribute |
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68 local enums |
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69 |
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70 if type(propschema) == "table" then |
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71 proptype = guess_schema_type(propschema); |
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72 elseif type(propschema) == "string" then |
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73 error("schema as string is not supported: " .. propschema .. " {" .. current_ns .. "}" .. propname) |
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74 end |
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75 |
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76 if proptype == "object" or proptype == "array" then |
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77 value_where = "in_children" |
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78 end |
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79 |
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80 if type(propschema) == "table" then |
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81 local xml = propschema.xml |
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82 if xml then |
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83 if xml.name then |
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84 name = xml.name |
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85 end |
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86 if xml.namespace and xml.namespace ~= current_ns then |
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87 namespace = xml.namespace |
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88 end |
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89 if xml.prefix then |
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90 prefix = xml.prefix |
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91 end |
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92 if proptype == "array" and xml.wrapped then |
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93 value_where = "in_wrapper" |
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94 elseif xml.attribute then |
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95 value_where = "in_attribute" |
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96 elseif xml.text then |
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97 value_where = "in_text" |
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98 elseif xml.x_name_is_value then |
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99 value_where = "in_tag_name" |
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100 elseif xml.x_single_attribute then |
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101 single_attribute = xml.x_single_attribute |
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102 value_where = "in_single_attribute" |
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103 end |
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104 end |
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105 if propschema["const"] then |
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106 enums = {propschema["const"]} |
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107 elseif propschema["enum"] then |
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108 enums = propschema["enum"] |
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109 end |
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110 end |
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111 |
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112 return proptype, value_where, name, namespace, prefix, single_attribute, enums |
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113 end |
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114 |
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115 local parse_object |
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116 local parse_array |
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117 |
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118 local function extract_value(s, value_where, proptype, name, namespace, prefix, single_attribute, enums) |
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119 if value_where == "in_tag_name" then |
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120 local c |
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121 if proptype == "boolean" then |
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122 c = s:get_child(name, namespace); |
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123 elseif enums and proptype == "string" then |
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124 |
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125 for i = 1, #enums do |
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126 c = s:get_child(enums[i], namespace); |
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127 if c then |
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128 break |
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129 end |
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130 end |
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131 else |
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132 c = s:get_child(nil, namespace); |
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133 end |
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134 if c then |
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135 return c.name |
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136 end |
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137 elseif value_where == "in_attribute" then |
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138 local attr = name |
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139 if prefix then |
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140 attr = prefix .. ":" .. name |
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141 elseif namespace and namespace ~= s.attr.xmlns then |
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142 attr = namespace .. "\1" .. name |
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143 end |
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144 return s.attr[attr] |
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145 |
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146 elseif value_where == "in_text" then |
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147 return s:get_text() |
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148 |
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149 elseif value_where == "in_single_attribute" then |
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150 local c = s:get_child(name, namespace) |
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151 return c and c.attr[single_attribute] |
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152 elseif value_where == "in_text_tag" then |
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153 return s:get_child_text(name, namespace) |
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154 end |
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155 end |
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156 |
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157 function parse_object(schema, s, root) |
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158 local out = {} |
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159 schema = resolve_schema(schema, root) |
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160 if type(schema) == "table" and schema.properties then |
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161 for prop, propschema in pairs(schema.properties) do |
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162 propschema = resolve_schema(propschema, root) |
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163 |
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164 local proptype, value_where, name, namespace, prefix, single_attribute, enums = unpack_propschema(propschema, prop, s.attr.xmlns) |
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165 |
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166 if value_where == "in_children" and type(propschema) == "table" then |
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167 if proptype == "object" then |
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168 local c = s:get_child(name, namespace) |
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169 if c then |
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170 out[prop] = parse_object(propschema, c, root); |
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171 end |
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172 elseif proptype == "array" then |
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173 local a = parse_array(propschema, s, root); |
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174 if a and a[1] ~= nil then |
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175 out[prop] = a; |
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176 end |
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177 else |
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178 error("unreachable") |
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179 end |
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180 elseif value_where == "in_wrapper" and type(propschema) == "table" and proptype == "array" then |
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181 local wrapper = s:get_child(name, namespace); |
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182 if wrapper then |
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183 out[prop] = parse_array(propschema, wrapper, root); |
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184 end |
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185 else |
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186 local value = extract_value(s, value_where, proptype, name, namespace, prefix, single_attribute, enums) |
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187 |
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188 out[prop] = totype(proptype, value) |
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189 end |
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190 end |
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191 end |
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192 |
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193 return out |
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194 end |
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195 |
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196 function parse_array(schema, s, root) |
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197 local itemschema = resolve_schema(schema.items, root); |
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198 local proptype, value_where, child_name, namespace, prefix, single_attribute, enums = unpack_propschema(itemschema, nil, s.attr.xmlns) |
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199 local attr_name |
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200 if value_where == "in_single_attribute" then |
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201 value_where = "in_attribute"; |
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202 attr_name = single_attribute; |
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203 end |
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204 local out = {} |
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205 |
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206 if proptype == "object" then |
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207 if type(itemschema) == "table" then |
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208 for c in s:childtags(child_name, namespace) do |
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209 table.insert(out, parse_object(itemschema, c, root)); |
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210 end |
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211 else |
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212 error("array items must be schema object") |
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213 end |
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214 elseif proptype == "array" then |
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215 if type(itemschema) == "table" then |
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216 for c in s:childtags(child_name, namespace) do |
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217 table.insert(out, parse_array(itemschema, c, root)); |
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218 end |
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219 end |
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220 else |
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221 for c in s:childtags(child_name, namespace) do |
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222 local value = extract_value(c, value_where, proptype, attr_name or child_name, namespace, prefix, single_attribute, enums) |
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223 |
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224 table.insert(out, totype(proptype, value)); |
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225 end |
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226 end |
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227 return out |
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228 end |
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229 |
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230 local function parse(schema, s) |
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231 local s_type = guess_schema_type(schema) |
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232 if s_type == "object" then |
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233 return parse_object(schema, s, schema) |
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234 elseif s_type == "array" then |
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235 return parse_array(schema, s, schema) |
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236 else |
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237 error("top-level scalars unsupported") |
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238 end |
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239 end |
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240 |
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241 local function toxmlstring(proptype, v) |
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242 if proptype == "string" and type(v) == "string" then |
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243 return v |
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244 elseif proptype == "number" and type(v) == "number" then |
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245 return string.format("%g", v) |
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246 elseif proptype == "integer" and type(v) == "number" then |
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247 return string.format("%d", v) |
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248 elseif proptype == "boolean" then |
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249 return v and "1" or "0" |
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250 end |
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251 end |
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252 |
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253 local unparse |
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254 |
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255 local function unparse_property(out, v, proptype, propschema, value_where, name, namespace, current_ns, prefix, |
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256 single_attribute, root) |
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257 |
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258 if value_where == "in_attribute" then |
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259 local attr = name |
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260 if prefix then |
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261 attr = prefix .. ":" .. name |
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262 elseif namespace and namespace ~= current_ns then |
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263 attr = namespace .. "\1" .. name |
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264 end |
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265 |
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266 out.attr[attr] = toxmlstring(proptype, v) |
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267 elseif value_where == "in_text" then |
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268 out:text(toxmlstring(proptype, v)) |
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269 elseif value_where == "in_single_attribute" then |
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270 assert(single_attribute) |
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271 local propattr = {} |
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272 |
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273 if namespace and namespace ~= current_ns then |
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274 propattr.xmlns = namespace |
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275 end |
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276 |
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277 propattr[single_attribute] = toxmlstring(proptype, v) |
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278 out:tag(name, propattr):up(); |
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279 |
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280 else |
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281 local propattr |
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282 if namespace ~= current_ns then |
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283 propattr = {xmlns = namespace} |
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284 end |
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285 if value_where == "in_tag_name" then |
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286 if proptype == "string" and type(v) == "string" then |
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287 out:tag(v, propattr):up(); |
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288 elseif proptype == "boolean" and v == true then |
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289 out:tag(name, propattr):up(); |
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290 end |
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291 elseif proptype == "object" and type(propschema) == "table" and type(v) == "table" then |
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292 local c = unparse(propschema, v, name, namespace, nil, root); |
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293 if c then |
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294 out:add_direct_child(c); |
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295 end |
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296 elseif proptype == "array" and type(propschema) == "table" and type(v) == "table" then |
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297 if value_where == "in_wrapper" then |
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298 local c = unparse(propschema, v, name, namespace, nil, root); |
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299 if c then |
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300 out:add_direct_child(c); |
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301 end |
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302 else |
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303 unparse(propschema, v, name, namespace, out, root); |
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304 end |
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305 else |
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306 out:text_tag(name, toxmlstring(proptype, v), propattr) |
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307 end |
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308 end |
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309 end |
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310 |
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311 function unparse(schema, t, current_name, current_ns, ctx, root) |
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312 |
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313 if root == nil then |
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314 root = schema |
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315 end |
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316 |
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317 if schema.xml then |
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318 if schema.xml.name then |
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319 current_name = schema.xml.name |
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320 end |
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321 if schema.xml.namespace then |
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322 current_ns = schema.xml.namespace |
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323 end |
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324 |
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325 end |
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326 |
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327 local out = ctx or st.stanza(current_name, {xmlns = current_ns}) |
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328 |
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329 local s_type = guess_schema_type(schema) |
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330 if s_type == "object" then |
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331 |
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332 for prop, propschema in pairs(schema.properties) do |
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333 propschema = resolve_schema(propschema, root) |
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334 local v = t[prop] |
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335 |
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336 if v ~= nil then |
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337 local proptype, value_where, name, namespace, prefix, single_attribute = unpack_propschema(propschema, prop, current_ns) |
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338 unparse_property(out, v, proptype, propschema, value_where, name, namespace, current_ns, prefix, single_attribute, root) |
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339 end |
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340 end |
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341 return out |
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342 |
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343 elseif s_type == "array" then |
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344 local itemschema = resolve_schema(schema.items, root) |
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345 local proptype, value_where, name, namespace, prefix, single_attribute = unpack_propschema(itemschema, current_name, current_ns) |
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346 for _, item in ipairs(t) do |
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347 unparse_property(out, item, proptype, itemschema, value_where, name, namespace, current_ns, prefix, single_attribute, root) |
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348 end |
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349 return out |
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util.datamapper: Add 'unparse' for turning tables into XML
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350 end |
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351 end |
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352 |
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353 return {parse = parse; unparse = unparse} |