Package org.apache.geode.cache.query.types

Interface CollectionType

All Superinterfaces:

DataSerializable, ObjectType, Serializable

All Known Subinterfaces:

MapType

public interface CollectionType
extends ObjectType

Represents the type of a collection, an object that can contain element objects.

Since:

GemFire 4.0

Nested Class Summary

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

DataSerializable.Replaceable

Method Summary

Modifier and Type	Method	Description
boolean	allowsDuplicates()	Return whether duplicates are kept in this type of collection.
ObjectType	getElementType()	Return the type of the elements of this collection type.
boolean	isOrdered()	Return whether this collection type has ordered elements.

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 Details

getElementType

ObjectType getElementType()

Return the type of the elements of this collection type.

Returns:

the type of the elements of this collection type

allowsDuplicates

boolean allowsDuplicates()

Return whether duplicates are kept in this type of collection. Duplicates are two objects are equal to each other as defined by the equals method.

Returns:

true if duplicates have been retained, false if duplicates have been eliminated

isOrdered

boolean isOrdered()

Return whether this collection type has ordered elements.

Returns:

true if this collection type is ordered, false if not