VMware GemFire Java API Reference

MapType (Tanzu GemFire 10.2.2)

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	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.DataSerializable
fromData, toData

Methods inherited from interface org.apache.geode.cache.query.types.ObjectType
getSimpleClassName, isCollectionType, isMapType, isStructType, resolveClass

- 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.
    
    Returns:
    
    the type of the entries in this map