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Peach 2.3

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Transformers

Transformers perform static tranforms or encoding on the parent element. Transforms are typically, but not always, two directional: encode and decode. Examples include ZIP compression, Base64 encoding, HTML encoding, etc.

Transfomers differ from Fixups in they operate on the parent element while Fixups reference another element’s data.

Example:

<DataModel name="Base64TLV">
  <Number name="Type" size="8" signed="false" value="1" token="true" />
  <Number name="Length" size="16" signed="false">
    <Relation type="size" of="base64Block" />
  </Number>

  <Block name="base64Block">
    <Transformer class="Base64Encode" />
    <Blob name="Data" />
  </Block>
</DataModel>

The output of the above data model is 0x01<len(b64(Data))><b64(Data)>