org.apache.geode.cache.query.types

## Interface MapType

- All Superinterfaces:
    CollectionType, DataSerializable, ObjectType, java.io.Serializable

      public interface MapType
      extends CollectionType

  Represents the type of a Map, a collection that contains keys as well as values and maintains an association between key-value pairs. The type of the keys is obtained from the getKeyType method, and the type of the values is obtained from the getElementType method.
  Since:
    GemFire 4.0

- - ### Nested Class Summary

    - ### Nested classes/interfaces inherited from interface org.apache.geode.DataSerializable

      `DataSerializable.Replaceable`

  - ### Method Summary

    All Methods Instance Methods Abstract Methods
    Modifier and Type | Method and Description
    --- | ---
    `StructType` | `getEntryType()` Return the type of the entries in this map.
    `ObjectType` | `getKeyType()` Return the type of the keys in this type of map.

    - ### Methods inherited from interface org.apache.geode.cache.query.types.CollectionType

      `allowsDuplicates, getElementType, isOrdered`

    - ### Methods inherited from interface org.apache.geode.cache.query.types.ObjectType

      `getSimpleClassName, isCollectionType, isMapType, isStructType, resolveClass`

    - ### Methods inherited from interface org.apache.geode.DataSerializable

      `fromData, toData`

- - ### Method Detail

    - #### getKeyType

          ObjectType getKeyType()

      Return the type of the keys in this type of map.
      Returns:
        the ObjectType of the keys in this type of map.

    - #### getEntryType

          StructType getEntryType()

      Return the type of the entries in this map. In the context of the query language, the entries in a map are structs with key and value fields.