Xu Yang created FLINK-13916:
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Summary: Add class for NGramMapper.
Key: FLINK-13916
URL: https://issues.apache.org/jira/browse/FLINK-13916
Project: Flink
Issue Type: Sub-task
Components: Library / Machine Learning
Reporter: Xu Yang
NGramMapper is a transformer to convert a document into a new
document composed of all its nGrams.
* Add NGramMapper for the operation of the NGramMapper.
* Add HasNDefaultAs2 for the params of NGramMapper.
* Add NGramMapperParams for the params of NGramMapper.
* Add NGramMapperTest for the test example.
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