Syntax

   FACTORY_DEF <ReaderKeyword> TransformFact:<TransformerName>
   [FACTORY_NAME <factory name>]
   [INPUT FEATURE_TYPE <feature type>
      [<attribute name> <attribute value>]*
      [<feature function>]*]+
   [GROUP_BY [<field name>]+]*
   [MULTI_PROCESS (NO_PARALLELISM|MINIMAL|MODERATE|AGGRESSIVE|EXTREME)]
   [PROCESS_GROUP_BY [<field name>]+]*
   [FACTORY_META_PARAMS <transformer params>*]
   [MAPPING_FILE_DATA]
   [OUTPUT * FEATURE_TYPE <feature type>
      [<attribute name> <attribute value>]*
      [<feature function>]*]*

Overview

   This special factory allows for the factory level usage of a transformer. It
   has two principal uses: looping for custom transformers and multi-process
   support.

   The factory has the following clauses that specify details on how to call the
   specified transformer. The clauses are as follows:

   GROUP_BY

      When not running in multi-process mode, this factory supports group-by for
      transformers that do not have native support.

   PROCESS_GROUP_BY

      These attributes are used to determine the groups to be processed by
      spawned child processes. Best practices are to ensure that the number of
      groups is relatively small, as one new process will be launched for each
      group.

   MULTI_PROCESS

      The value here provides a hint to FME as to the number of processes that
      should be spawned simultaneously. Licensing will also limit the allowed
      number of processes. MINIMAL will launch enough processes to occupy 50% of
      the logical processors, MODERATE will launch 100%, AGGRESSIVE will launch
      150% and EXTREME will launch at 200%.

   FACTORY_META_PARAMS

      A comma separated list of parameters for instantiating the desired
      transformer. Two special prefixes, TRANSFORMER_PARAMS and TRANSFORMER_NAME
      are used to delimit the transformer name and parameters.

Input and Output Tags

   The TransformFactory requires that the input and output tags are compatible
   with the requested transformer.

TO BE RESOLVED

   MAPPING_FILE_DATA clause not documented.