author | Kim Alvefur <zash@zash.se> |
Mon, 22 Mar 2021 10:05:41 +0100 | |
changeset 11475 | ab03de8e503e |
parent 11474 | 5ebad952ebf7 |
child 11479 | 9bd36e871f05 |
permissions | -rw-r--r-- |
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-- Copyright (C) 2021 Kim Alvefur |
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-- |
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-- This project is MIT/X11 licensed. Please see the |
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-- COPYING file in the source package for more information. |
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-- |
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-- Based on |
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-- https://json-schema.org/draft/2020-12/json-schema-core.html |
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-- https://json-schema.org/draft/2020-12/json-schema-validation.html |
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-- http://spec.openapis.org/oas/v3.0.1#xmlObject |
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-- https://github.com/OAI/OpenAPI-Specification/issues/630 (text:true) |
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-- |
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-- XML Object Extensions: |
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-- text to refer to the text content at the same time as attributes |
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-- x_name_is_value for enum fields where the <tag-name/> is the value |
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-- x_single_attribute for <tag attr="this"/> |
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-- |
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-- TODO pointers |
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-- TODO cleanup / refactor |
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-- TODO s/number/integer/ once we have appropriate math.type() compat |
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-- |
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local st = require "util.stanza"; |
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local json = require"util.json" |
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local json_type_name = json.json_type_name; |
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local json_schema_object = require "util.jsonschema" |
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local type schema_t = boolean | json_type_name | json_schema_object |
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local function toboolean ( s : string ) : boolean |
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if s == "true" or s == "1" then |
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return true |
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elseif s == "false" or s == "0" then |
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return false |
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elseif s then |
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return true |
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end |
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end |
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local function totype(t : json_type_name, s : string) : any |
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if t == "string" then |
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return s; |
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elseif t == "boolean" then |
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return toboolean(s) |
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elseif t == "number" or t == "integer" then |
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return tonumber(s) |
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end |
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end |
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local enum value_goes |
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"in_tag_name" |
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"in_text" |
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"in_text_tag" |
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"in_attribute" |
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"in_single_attribute" |
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"in_children" |
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"in_wrapper" |
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end |
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local function unpack_propschema( propschema : schema_t, propname : string, current_ns : string ) |
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: json_type_name, value_goes, string, string, string, string, { any } |
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local proptype : json_type_name = "string" |
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local value_where : value_goes = propname and "in_text_tag" or "in_text" |
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local name = propname |
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local namespace = current_ns |
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local prefix : string |
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local single_attribute : string |
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local enums : { any } |
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if propschema is json_schema_object then |
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proptype = propschema.type |
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elseif propschema is json_type_name then |
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proptype = propschema |
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end |
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if proptype == "object" or proptype == "array" then |
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value_where = "in_children" |
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end |
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if propschema is json_schema_object then |
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local xml = propschema.xml |
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if xml then |
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if xml.name then |
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name = xml.name |
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end |
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if xml.namespace then |
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namespace = xml.namespace |
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end |
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if xml.prefix then |
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prefix = xml.prefix |
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end |
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if proptype == "array" and xml.wrapped then |
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value_where = "in_wrapper" |
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elseif xml.attribute then |
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value_where = "in_attribute" |
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elseif xml.text then |
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value_where = "in_text" |
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elseif xml.x_name_is_value then |
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value_where = "in_tag_name" |
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elseif xml.x_single_attribute then |
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single_attribute = xml.x_single_attribute |
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value_where = "in_single_attribute" |
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end |
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end |
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if propschema["const"] then |
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enums = { propschema["const"] } |
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elseif propschema["enum"] then |
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enums = propschema["enum"] |
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end |
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end |
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return proptype, value_where, name, namespace, prefix, single_attribute, enums |
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end |
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114 |
local parse_object : function (schema : schema_t, s : st.stanza_t) : { string : any } |
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local parse_array : function (schema : schema_t, s : st.stanza_t) : { any } |
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|
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local function extract_value (s : st.stanza_t, value_where : value_goes, proptype : json.json_type_name, name : string, namespace : string, prefix : string, single_attribute : string, enums : { any }) : string |
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118 |
if value_where == "in_tag_name" then |
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119 |
local c : st.stanza_t |
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120 |
if proptype == "boolean" then |
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c = s:get_child(name, namespace); |
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122 |
elseif enums and proptype == "string" then |
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123 |
-- XXX O(n²) ? |
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124 |
-- Probably better to flip the table and loop over :childtags(nil, ns), should be 2xO(n) |
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125 |
-- BUT works first, optimize later |
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126 |
for i = 1, #enums do |
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c = s:get_child(enums[i] as string, namespace); |
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128 |
if c then break end |
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129 |
end |
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130 |
else |
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131 |
c = s:get_child(nil, namespace); |
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132 |
end |
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133 |
if c then |
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134 |
return c.name; |
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135 |
end |
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136 |
elseif value_where == "in_attribute" then |
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137 |
local attr = name |
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138 |
if prefix then |
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attr = prefix .. ':' .. name |
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elseif namespace ~= s.attr.xmlns then |
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attr = namespace .. "\1" .. name |
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142 |
end |
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143 |
return s.attr[attr] |
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144 |
|
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elseif value_where == "in_text" then |
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146 |
return s:get_text() |
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147 |
|
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148 |
elseif value_where == "in_single_attribute" then |
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|
149 |
local c = s:get_child(name, namespace) |
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150 |
return c and c.attr[single_attribute] |
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151 |
elseif value_where == "in_text_tag" then |
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152 |
return s:get_child_text(name, namespace) |
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153 |
end |
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154 |
end |
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155 |
|
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|
156 |
function parse_object (schema : schema_t, s : st.stanza_t) : { string : any } |
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|
157 |
local out : { string : any } = {} |
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|
158 |
if schema is json_schema_object and schema.properties then |
11439
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|
159 |
for prop, propschema in pairs(schema.properties) do |
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|
160 |
|
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|
161 |
local proptype, value_where, name, namespace, prefix, single_attribute, enums = unpack_propschema(propschema, prop, s.attr.xmlns) |
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|
162 |
|
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|
163 |
if value_where == "in_children" and propschema is json_schema_object then |
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|
164 |
if proptype == "object" then |
11439
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165 |
local c = s:get_child(name, namespace) |
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|
166 |
if c then |
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167 |
out[prop] = parse_object(propschema, c); |
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168 |
end |
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|
169 |
elseif proptype == "array" then |
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170 |
out[prop] = parse_array(propschema, s); |
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|
171 |
else |
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|
172 |
error "unreachable" |
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|
173 |
end |
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|
174 |
elseif value_where == "in_wrapper" and propschema is json_schema_object and proptype == "array" then |
11461
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|
175 |
local wrapper = s:get_child(name, namespace); |
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|
176 |
if wrapper then |
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|
177 |
out[prop] = parse_array(propschema, wrapper); |
11465
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changeset
|
178 |
end |
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changeset
|
179 |
else |
11469
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changeset
|
180 |
local value : string = extract_value (s, value_where, proptype, name, namespace, prefix, single_attribute, enums) |
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|
181 |
|
11459
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parents:
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diff
changeset
|
182 |
out[prop] = totype(proptype, value) |
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changeset
|
183 |
end |
11439
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util.datamapper: Library for extracting data from stanzas
Kim Alvefur <zash@zash.se>
parents:
diff
changeset
|
184 |
end |
a1fa6202fa13
util.datamapper: Library for extracting data from stanzas
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parents:
diff
changeset
|
185 |
end |
a1fa6202fa13
util.datamapper: Library for extracting data from stanzas
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parents:
diff
changeset
|
186 |
|
a1fa6202fa13
util.datamapper: Library for extracting data from stanzas
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diff
changeset
|
187 |
return out |
a1fa6202fa13
util.datamapper: Library for extracting data from stanzas
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parents:
diff
changeset
|
188 |
end |
a1fa6202fa13
util.datamapper: Library for extracting data from stanzas
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parents:
diff
changeset
|
189 |
|
11465
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util.datamapper: Deal with type name changes in util.jsonschema
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parents:
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diff
changeset
|
190 |
function parse_array (schema : json_schema_object, s : st.stanza_t) : { any } |
11475
ab03de8e503e
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diff
changeset
|
191 |
local itemschema : schema_t = schema.items; |
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11474
diff
changeset
|
192 |
local proptype, value_where, child_name, namespace, prefix, single_attribute, enums = unpack_propschema(itemschema, nil, s.attr.xmlns) |
11470
c098d07e6717
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diff
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|
193 |
local attr_name : string |
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changeset
|
194 |
if value_where == "in_single_attribute" then -- FIXME this shouldn't be needed |
c098d07e6717
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|
195 |
value_where = "in_attribute"; |
c098d07e6717
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changeset
|
196 |
attr_name = single_attribute; |
c098d07e6717
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diff
changeset
|
197 |
end |
11461
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changeset
|
198 |
local out : { any } = {} |
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changeset
|
199 |
|
11475
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changeset
|
200 |
if proptype == "object" then |
ab03de8e503e
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diff
changeset
|
201 |
if itemschema is json_schema_object then |
ab03de8e503e
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parents:
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diff
changeset
|
202 |
for c in s:childtags(child_name, namespace) do |
ab03de8e503e
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diff
changeset
|
203 |
table.insert(out, parse_object(itemschema, c)); |
ab03de8e503e
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changeset
|
204 |
end |
ab03de8e503e
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parents:
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diff
changeset
|
205 |
else |
ab03de8e503e
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parents:
11474
diff
changeset
|
206 |
error "array items must be schema object" |
ab03de8e503e
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parents:
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diff
changeset
|
207 |
end |
ab03de8e503e
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parents:
11474
diff
changeset
|
208 |
elseif proptype == "array" then |
ab03de8e503e
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parents:
11474
diff
changeset
|
209 |
if itemschema is json_schema_object then |
ab03de8e503e
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parents:
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diff
changeset
|
210 |
for c in s:childtags(child_name, namespace) do |
ab03de8e503e
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parents:
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diff
changeset
|
211 |
table.insert(out, parse_array(itemschema, c)); |
ab03de8e503e
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parents:
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diff
changeset
|
212 |
end |
ab03de8e503e
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parents:
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diff
changeset
|
213 |
end |
ab03de8e503e
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parents:
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diff
changeset
|
214 |
else |
ab03de8e503e
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parents:
11474
diff
changeset
|
215 |
for c in s:childtags(child_name, namespace) do |
ab03de8e503e
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parents:
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diff
changeset
|
216 |
local value : string = extract_value (c, value_where, proptype, attr_name or child_name, namespace, prefix, single_attribute, enums) |
ab03de8e503e
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diff
changeset
|
217 |
|
ab03de8e503e
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diff
changeset
|
218 |
table.insert(out, totype(proptype, value)); |
ab03de8e503e
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diff
changeset
|
219 |
end |
11461
6a51749af7f4
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diff
changeset
|
220 |
end |
6a51749af7f4
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diff
changeset
|
221 |
return out; |
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222 |
end |
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223 |
|
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local function parse (schema : json_schema_object, s : st.stanza_t) : table |
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if schema.type == "object" then |
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return parse_object(schema, s) |
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elseif schema.type == "array" then |
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return parse_array(schema, s) |
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229 |
else |
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error "top-level scalars unsupported" |
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231 |
end |
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232 |
end |
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233 |
|
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234 |
local unparse : function (json_schema_object, table, string, string, st.stanza_t) : st.stanza_t |
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235 |
|
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236 |
local function unparse_property(out : st.stanza_t, v : any, proptype : json_type_name, propschema : schema_t, value_where : value_goes, name : string, namespace : string, current_ns : string, prefix : string, single_attribute : string) |
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if value_where == "in_attribute" then |
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238 |
local attr = name |
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239 |
if prefix then |
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240 |
attr = prefix .. ':' .. name |
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241 |
elseif namespace ~= current_ns then |
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attr = namespace .. "\1" .. name |
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243 |
end |
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|
244 |
|
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245 |
if proptype == "string" and v is string then |
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out.attr[attr] = v |
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elseif proptype == "number" and v is number then |
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out.attr[attr] = string.format("%g", v) |
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elseif proptype == "integer" and v is number then -- TODO is integer |
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out.attr[attr] = string.format("%d", v) |
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251 |
elseif proptype == "boolean" then |
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out.attr[attr] = v and "1" or "0" |
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253 |
end |
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|
254 |
elseif value_where == "in_text" then |
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|
255 |
if v is string then |
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|
256 |
out:text(v) |
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|
257 |
end |
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|
258 |
elseif value_where == "in_single_attribute" then |
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|
259 |
assert(single_attribute) |
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|
260 |
local propattr : { string : string } = {} |
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|
261 |
|
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|
262 |
if namespace ~= current_ns then |
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|
263 |
propattr.xmlns = namespace |
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|
264 |
end |
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changeset
|
265 |
|
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|
266 |
if proptype == "string" and v is string then |
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|
267 |
propattr[single_attribute] = v |
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|
268 |
elseif proptype == "number" and v is number then |
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|
269 |
propattr[single_attribute] = string.format("%g", v) |
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|
270 |
elseif proptype == "integer" and v is number then -- TODO is integer |
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|
271 |
propattr[single_attribute] = string.format("%d", v) |
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|
272 |
elseif proptype == "boolean" and v is boolean then |
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|
273 |
propattr[single_attribute] = v and "1" or "0" |
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|
274 |
end |
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|
275 |
out:tag(name, propattr):up(); |
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|
276 |
|
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changeset
|
277 |
else |
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|
278 |
local propattr : { string : string } |
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|
279 |
if namespace ~= current_ns then |
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|
280 |
propattr = { xmlns = namespace } |
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changeset
|
281 |
end |
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|
282 |
if value_where == "in_tag_name" then |
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|
283 |
if proptype == "string" and v is string then |
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|
284 |
out:tag(v, propattr):up(); |
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changeset
|
285 |
elseif proptype == "boolean" and v == true then |
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changeset
|
286 |
out:tag(name, propattr):up(); |
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diff
changeset
|
287 |
end |
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changeset
|
288 |
elseif proptype == "string" and v is string then |
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changeset
|
289 |
out:text_tag(name, v, propattr) |
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changeset
|
290 |
elseif proptype == "number" and v is number then |
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diff
changeset
|
291 |
out:text_tag(name, string.format("%g", v), propattr) |
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changeset
|
292 |
elseif proptype == "integer" and v is number then -- TODO is integer |
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changeset
|
293 |
out:text_tag(name, string.format("%d", v), propattr) |
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changeset
|
294 |
elseif proptype == "boolean" and v is boolean then |
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diff
changeset
|
295 |
out:text_tag(name, v and "1" or "0", propattr) |
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diff
changeset
|
296 |
elseif proptype == "object" and propschema is json_schema_object and v is table then |
88792dd2bee9
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diff
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|
297 |
local c = unparse(propschema, v, name, namespace); |
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changeset
|
298 |
if c then |
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changeset
|
299 |
out:add_direct_child(c); |
88792dd2bee9
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parents:
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diff
changeset
|
300 |
end |
88792dd2bee9
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Kim Alvefur <zash@zash.se>
parents:
11470
diff
changeset
|
301 |
elseif proptype == "array" and propschema is json_schema_object and v is table then |
88792dd2bee9
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Kim Alvefur <zash@zash.se>
parents:
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diff
changeset
|
302 |
if value_where == "in_wrapper" then |
88792dd2bee9
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Kim Alvefur <zash@zash.se>
parents:
11470
diff
changeset
|
303 |
local c = unparse(propschema, v, name, namespace); |
88792dd2bee9
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diff
changeset
|
304 |
if c then |
88792dd2bee9
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parents:
11470
diff
changeset
|
305 |
out:add_direct_child(c); |
88792dd2bee9
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parents:
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diff
changeset
|
306 |
end |
88792dd2bee9
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Kim Alvefur <zash@zash.se>
parents:
11470
diff
changeset
|
307 |
else |
88792dd2bee9
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parents:
11470
diff
changeset
|
308 |
unparse(propschema, v, name, namespace, out); |
88792dd2bee9
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parents:
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diff
changeset
|
309 |
end |
88792dd2bee9
util.datamapper: Factor out handling of object properties for array reuse
Kim Alvefur <zash@zash.se>
parents:
11470
diff
changeset
|
310 |
end |
88792dd2bee9
util.datamapper: Factor out handling of object properties for array reuse
Kim Alvefur <zash@zash.se>
parents:
11470
diff
changeset
|
311 |
end |
88792dd2bee9
util.datamapper: Factor out handling of object properties for array reuse
Kim Alvefur <zash@zash.se>
parents:
11470
diff
changeset
|
312 |
end |
88792dd2bee9
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Kim Alvefur <zash@zash.se>
parents:
11470
diff
changeset
|
313 |
|
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diff
changeset
|
314 |
function unparse ( schema : json_schema_object, t : table, current_name : string, current_ns : string, ctx : st.stanza_t ) : st.stanza_t |
11440
5df9ffc25bb4
util.datamapper: Add 'unparse' for turning tables into XML
Kim Alvefur <zash@zash.se>
parents:
11439
diff
changeset
|
315 |
|
11465
766b0eddd12c
util.datamapper: Deal with type name changes in util.jsonschema
Kim Alvefur <zash@zash.se>
parents:
11463
diff
changeset
|
316 |
if schema.xml then |
766b0eddd12c
util.datamapper: Deal with type name changes in util.jsonschema
Kim Alvefur <zash@zash.se>
parents:
11463
diff
changeset
|
317 |
if schema.xml.name then |
766b0eddd12c
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parents:
11463
diff
changeset
|
318 |
current_name = schema.xml.name |
11440
5df9ffc25bb4
util.datamapper: Add 'unparse' for turning tables into XML
Kim Alvefur <zash@zash.se>
parents:
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diff
changeset
|
319 |
end |
11465
766b0eddd12c
util.datamapper: Deal with type name changes in util.jsonschema
Kim Alvefur <zash@zash.se>
parents:
11463
diff
changeset
|
320 |
if schema.xml.namespace then |
766b0eddd12c
util.datamapper: Deal with type name changes in util.jsonschema
Kim Alvefur <zash@zash.se>
parents:
11463
diff
changeset
|
321 |
current_ns = schema.xml.namespace |
766b0eddd12c
util.datamapper: Deal with type name changes in util.jsonschema
Kim Alvefur <zash@zash.se>
parents:
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diff
changeset
|
322 |
end |
766b0eddd12c
util.datamapper: Deal with type name changes in util.jsonschema
Kim Alvefur <zash@zash.se>
parents:
11463
diff
changeset
|
323 |
-- TODO prefix? |
766b0eddd12c
util.datamapper: Deal with type name changes in util.jsonschema
Kim Alvefur <zash@zash.se>
parents:
11463
diff
changeset
|
324 |
end |
11440
5df9ffc25bb4
util.datamapper: Add 'unparse' for turning tables into XML
Kim Alvefur <zash@zash.se>
parents:
11439
diff
changeset
|
325 |
|
11466
d1982b7eb00d
util.datamapper: Fix arrays nesting one level too deep
Kim Alvefur <zash@zash.se>
parents:
11465
diff
changeset
|
326 |
local out = ctx or st.stanza(current_name, { xmlns = current_ns }) |
11440
5df9ffc25bb4
util.datamapper: Add 'unparse' for turning tables into XML
Kim Alvefur <zash@zash.se>
parents:
11439
diff
changeset
|
327 |
|
11462
0e00fa518688
util.datamapper: Limited support for unparsing simple arrays of strings
Kim Alvefur <zash@zash.se>
parents:
11461
diff
changeset
|
328 |
if schema.type == "object" then |
0e00fa518688
util.datamapper: Limited support for unparsing simple arrays of strings
Kim Alvefur <zash@zash.se>
parents:
11461
diff
changeset
|
329 |
|
11440
5df9ffc25bb4
util.datamapper: Add 'unparse' for turning tables into XML
Kim Alvefur <zash@zash.se>
parents:
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330 |
for prop, propschema in pairs(schema.properties) do |
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331 |
local v = t[prop] |
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diff
changeset
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332 |
|
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util.datamapper: Add 'unparse' for turning tables into XML
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parents:
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diff
changeset
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333 |
if v ~= nil then |
11460
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parents:
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diff
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334 |
local proptype, value_where, name, namespace, prefix, single_attribute = unpack_propschema(propschema, prop, current_ns) |
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diff
changeset
|
335 |
unparse_property(out, v, proptype, propschema, value_where, name, namespace, current_ns, prefix, single_attribute) |
11440
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parents:
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diff
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|
336 |
end |
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parents:
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diff
changeset
|
337 |
end |
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util.datamapper: Add 'unparse' for turning tables into XML
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parents:
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changeset
|
338 |
return out; |
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Kim Alvefur <zash@zash.se>
parents:
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diff
changeset
|
339 |
|
11462
0e00fa518688
util.datamapper: Limited support for unparsing simple arrays of strings
Kim Alvefur <zash@zash.se>
parents:
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diff
changeset
|
340 |
elseif schema.type == "array" then |
11472
348b191cd850
util.datamapper: Complete array building support
Kim Alvefur <zash@zash.se>
parents:
11471
diff
changeset
|
341 |
local proptype, value_where, name, namespace, prefix, single_attribute = unpack_propschema(schema.items, current_name, current_ns) |
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util.datamapper: Complete array building support
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parents:
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diff
changeset
|
342 |
for _, item in ipairs(t as { string }) do |
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util.datamapper: Complete array building support
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parents:
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diff
changeset
|
343 |
unparse_property(out, item, proptype, schema.items, value_where, name, namespace, current_ns, prefix, single_attribute) |
11462
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util.datamapper: Limited support for unparsing simple arrays of strings
Kim Alvefur <zash@zash.se>
parents:
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diff
changeset
|
344 |
end |
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util.datamapper: Limited support for unparsing simple arrays of strings
Kim Alvefur <zash@zash.se>
parents:
11461
diff
changeset
|
345 |
return out; |
11440
5df9ffc25bb4
util.datamapper: Add 'unparse' for turning tables into XML
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parents:
11439
diff
changeset
|
346 |
end |
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util.datamapper: Add 'unparse' for turning tables into XML
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parents:
11439
diff
changeset
|
347 |
end |
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util.datamapper: Add 'unparse' for turning tables into XML
Kim Alvefur <zash@zash.se>
parents:
11439
diff
changeset
|
348 |
|
11439
a1fa6202fa13
util.datamapper: Library for extracting data from stanzas
Kim Alvefur <zash@zash.se>
parents:
diff
changeset
|
349 |
return { |
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util.datamapper: Library for extracting data from stanzas
Kim Alvefur <zash@zash.se>
parents:
diff
changeset
|
350 |
parse = parse, |
11440
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util.datamapper: Add 'unparse' for turning tables into XML
Kim Alvefur <zash@zash.se>
parents:
11439
diff
changeset
|
351 |
unparse = unparse, |
11439
a1fa6202fa13
util.datamapper: Library for extracting data from stanzas
Kim Alvefur <zash@zash.se>
parents:
diff
changeset
|
352 |
} |