ConstantStringMapper ignores the common.MapStr source and returns the ConstantString as the mapping result.

EventTimeMapper expects a generator to generate values when DoMap is called.

GeneratorMapper expects a generator to generate values when DoMap is called.

KeyMapper searches for the Key in a common.MapStr object and returns the values.

LogMapper does the mapping between filebeat's common.MapStr objects and Log objects.

MultipleKeyValueMapper searches for all given Keys in a common.MapStr object and returns the values together with the configured key values.

MultipleKeyValueStringMapper is a wrapper around MultipleKeyValueMapper to ensure that the mapping results are strings.

StringMapper is a wrapper around Mapper to ensure that the mapping result is a string.