Class EntryViews.NoValueReadOnlyView<K,V>

java.lang.Object

org.infinispan.functional.impl.EntryViews.NoValueReadOnlyView<K,V>

All Implemented Interfaces:

EntryView.ReadEntryView<K,V>, MetaParam.Lookup

Enclosing class:

EntryViews

@ProtoTypeId(1074)
public static final class EntryViews.NoValueReadOnlyView<K,V>
extends Object
implements EntryView.ReadEntryView<K,V>

Since:

8.0

Constructor Summary

Constructors

Constructor	Description
NoValueReadOnlyView(K key, DataConversion keyDataConversion)

Method Summary

Modifier and Type	Method	Description
Optional<V>	find()	Optional value.
<T extends MetaParam> Optional<T>	findMetaParam(Class<T> type)	Returns a non-empty Optional instance containing a metadata parameter instance that can be assigned to the type Class passed in, or an empty Optional if no metadata can be assigned to that type.
V	get()	Returns a non-null value if the key has a value associated with it or throws NoSuchElementException if no value is associated with the entry.
K	key()	Key of the read-only entry view.
String	toString()

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Methods inherited from interface org.infinispan.functional.EntryView.ReadEntryView

peek

Constructor Details

NoValueReadOnlyView

public NoValueReadOnlyView(K key,
 DataConversion keyDataConversion)

Method Details

key

public K key()

Description copied from interface: EntryView.ReadEntryView

Key of the read-only entry view. Guaranteed to return a non-null value. The instance of the key must not be mutated.

Specified by:

key in interface EntryView.ReadEntryView<K,V>

get

public V get()
      throws NoSuchElementException

Description copied from interface: EntryView.ReadEntryView

Returns a non-null value if the key has a value associated with it or throws NoSuchElementException if no value is associated with the entry.

The value instance is read-only and must not be mutated. If the function accessing this value is about to update the entry, it has to create a defensive copy (or completely new instance) and store it using EntryView.WriteEntryView.set(Object, MetaParam.Writable[]).

Specified by:

get in interface EntryView.ReadEntryView<K,V>

Throws:

NoSuchElementException - if no value is associated with the key.

find

public Optional<V> find()

Description copied from interface: EntryView.ReadEntryView

Optional value. It'll return a non-empty value when the value is present, and empty when the value is not present.

The value instance is read-only and must not be mutated. If the function accessing this value is about to update the entry, it has to create a defensive copy (or completely new instance) and store it using EntryView.WriteEntryView.set(Object, MetaParam.Writable[]).

Specified by:

find in interface EntryView.ReadEntryView<K,V>

findMetaParam

public <T extends MetaParam> Optional<T> findMetaParam(Class<T> type)

Description copied from interface: MetaParam.Lookup

Returns a non-empty Optional instance containing a metadata parameter instance that can be assigned to the type Class passed in, or an empty Optional if no metadata can be assigned to that type.

Specified by:

findMetaParam in interface MetaParam.Lookup

Type Parameters:

T - metadata parameter type

toString

public String toString()

Overrides:

toString in class Object