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LUA Transform
Description
This part allows you to transform one LUA structure to another based on a given schema. The schema is defined in an XML structure with a root element called “lua:schema” with at least the LUA transformation schema version attribute filled; for example, <lua:schema version="1.0"></lua:schema>.
The schema can have the following elements, and some elements can have child elements.
| Element | Description | Parameters |
| lua:element | This copies the value from the source data object or value to the target. Note: This transform-schema element cannot have child transform-schema elements. |
source input data-object path. value input-value. name target data-object path |
| lua:table | This processes the child transform-schema-elements on the <source> data-object or <value> and places the result in the target <name> location.. Note: If you leave both the source and value empty the system uses the parent data object. |
source input data-object path. value input-value. name target data-object path |
| lua:collection | This iterates through (the numbered and alphanumeric indexes) all child elements of the <source> and adds the values to a collection called <name>.. If the child element is a LUA structure the system determines the resulting value by processing all child transform-schema elements first.. Note: If you leave the source empty the system uses teh parent data object. |
source input data-object path. name target data-object path index if set the index parameter is interpolated using the child element structure. This can be used to generate a collection with alphanumeric indexes |
| lua:unbase64 | The system decodes base64 in the input data object (<source>) or value (<value>) and writes it into the result. Note: This transform-schema element cannot have child transform-schema elements. |
source input data-object path value input-value name target data-object path |
Examples
Note: <lua:schema></lua:schema> is left out for readability.
Inputs:
- { structurea = { "a", "b" }, structureb = {substructure = { b = "test", a = 1 } }}
- { structurea = { "a", "b" }, structureb = "eyBzdWJzdHJ1Y3R1cmUgPSB7IGIgPSAidGVzdCIsIGEgPSAxIH0gfQ==" }
- { structurea = { "a", "b" }, structureb = { { a = 1, b = "b1" }, { a = 2, b = "b2" } }, structurec = { b1 = { a = 1 }, b2 = { a = 2 } } }
| Input | Schema | Result |
| 1 | <lua:schemaversion="1.0"> <lua:element name="structurea"source="structurea"/> <lua:element name="structureb" source="structureb"/> </lua:schema> |
Same as input 1 |
| 1 | <lua:table><lua:element name="structurea" source="structurea"/><lua:element name="structureb" source="structureb"/></lua:table> | Same as input 1 |
| 1 | <lua:element name="structureb" source="structureb"/> | only the structureb is left { structureb = { substructure = { b = "test", a = 1 } } } |
| 1 | <lua:element name="structureb2" source="structureb"/> | only the structureb is left and it is renamed to structureb2 { structureb2 = { substructure = { b = "test", a = 1 } } } |
| 1 | <lua:table name="structureb2" source="structureb"><lua:element name="substructure" source="substructure"/></lua:table> | only the structureb is left and it is renamed to structureb2 { structureb2 = { substructure = { b = "test", a = 1 } } } |
| 2 | <lua:table><lua:element name="structurea" source="structurea"/><lua:unbase64 name="structureb" source="structureb"/></lua:table> | Same as input 1 |
| 3 | <lua:table><lua:collection name="col" source="structurea"/></lua:table> | { col = { "a", "b" } } |
| 3 | <lua:collection name="col" source="structureb"><lua:element name="a" source="a"/></lua:collection> | { col = {{ a = 1}, { a = 2 } }} |
| 3 | <lua:collection name="col" source="structureb" index="$(b)"><lua:table><lua:element name="a" source="a"/></lua:table></lua:collection> | { col = { b1 = { a = 1}, b2 = { a = 2 } }} |
| 3 | <lua:collection name="col" source="structurec"><lua:element name="a" source="a"/></lua:collection> | { col = { { a = 1}, { a = 2 } }} |
Editor Fields
The following fields control the configuration of this part.
| Tab | Field Name | Description/Use | Type | Optional/Mandatory |
| Basic | Input Data-object | This is the location where the system can find the data to be transformed. | Object | Mandatory |
| Basic | Transformation schema | This is the XML-formatted transformation schema. | Text | Mandatory |
| Basic | Result Data-Object | This is the location where the system stores the result. | Object | Mandatory |
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