# Uses of Package
com.hazelcast.query.extractor

- Packages that use com.hazelcast.query.extractor
  Package | Description
  --- | ---
  com.hazelcast.query.extractor | Contains classes related to custom attributes and the extraction of their values.

- Classes in com.hazelcast.query.extractor used by com.hazelcast.query.extractor
  Class and Description
  ValueCallback Enables notifying about values extracted in a `ValueExtractor`
  ValueCollector Enables collecting values extracted in a `ValueExtractor`
  ValueReadingException Exception thrown if there is any checked or unchecked exception caught in the value reading in `ValueReader`

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