## Uses of Interface
com.sleepycat.persist.EntityIndex

- Packages that use EntityIndex
  Package | Description
  --- | ---
  com.sleepycat.persist | The Direct Persistence Layer (DPL) adds a persistent object model to the Berkeley DB transactional engine.

- - ### Uses of EntityIndex in com.sleepycat.persist

    Classes in com.sleepycat.persist that implement EntityIndex
    Modifier and Type | Class | Description
    --- | --- | ---
    `class` | `PrimaryIndex<PK,​E>` | The primary index for an entity class and its primary key.
    `class` | `SecondaryIndex<SK,​PK,​E>` | The secondary index for an entity class and a secondary key.

    Methods in com.sleepycat.persist that return EntityIndex
    Modifier and Type | Method | Description
    --- | --- | ---
    `EntityIndex<SK,​PK>` | SecondaryIndex.`keysIndex()` | Returns a read-only keys index that maps secondary key to primary key.
    `EntityIndex<PK,​E>` | SecondaryIndex.`subIndex​(SK key)` | Returns an index that maps primary key to entity for the subset of entities having a given secondary key (duplicates).

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