Package com.tangosol.net

Class MapViewBuilder<K,V_BACK,V_FRONT>

java.lang.Object

com.tangosol.net.MapViewBuilder<K,V_BACK,V_FRONT>

Type Parameters:

K - the type of the map entry keys

V_BACK - the type of the entry values in the backing map that is used as the source for this view

V_FRONT - the type of the entry values in this view, which will be the same as V_BACK, unless a transformer is specified when creating this view

Direct Known Subclasses:

ViewBuilder

public class MapViewBuilder<K,V_BACK,V_FRONT>
extends Object

The ViewBuilder provides a means to build() a map view using a fluent pattern / style.

Since:

20.06

Author:

Aleks Seovic 2020.06.06

Field Summary

Fields

Modifier and Type	Field	Description
protected final Supplier<NamedCache<K,V_BACK>>	f_supplierNamedCache	The Supplier returning a NamedCache from which the view will be created.
protected boolean	m_fCacheValues	Flag controlling if the view will store both keys and values or only keys.
protected Filter	m_filter	The Filter that will be used to define the entries maintained in this view.
protected MapListener<? super K,? super V_FRONT>	m_listener	The MapListener that will receive all the events from the view, including those corresponding to its initial population.
protected ClassLoader	m_loader	The View's ClassLoader.
protected ValueExtractor<? super V_BACK,? extends V_FRONT>	m_mapper	The ValueExtractor that will be used to transform values retrieved from the underlying map before storing them locally; if specified, this view will become read-only.

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	MapViewBuilder(Supplier<NamedCache<K,V_BACK>> supplierNamedCache)	Construct a new ViewBuilder for the provided Supplier.

Method Summary

Modifier and Type	Method	Description
NamedMap<K,V_FRONT>	build()	Construct a view of the NamedMap provided to this builder.
MapViewBuilder<K,V_BACK,V_FRONT>	filter(Filter filter)	The Filter that will be used to define the entries maintained in this view.
MapViewBuilder<K,V_BACK,V_FRONT>	keys()	The resulting view will only map keys.
MapViewBuilder<K,V_BACK,V_FRONT>	listener(MapListener<? super K,? super V_FRONT> listener)	The MapListener that will receive all events, including those that result from the initial population of the view.
MapViewBuilder<K,V_BACK,V_FRONT>	map(ValueExtractor<? super V_BACK,? extends V_FRONT> mapper)	The ValueExtractor that this view will use to transform the results from the underlying map prior to storing them locally.
MapViewBuilder<K,V_BACK,V_FRONT>	values()	The resulting view with both map keys and values.
MapViewBuilder<K,V_BACK,V_FRONT>	withClassLoader(ClassLoader loader)	The optional ClassLoader to use when performing serialization/de-serialization operations.

Methods inherited from class java.lang.Object

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

Field Details

f_supplierNamedCache

protected final Supplier<NamedCache<K,V_BACK>> f_supplierNamedCache

The Supplier returning a NamedCache from which the view will be created.

m_filter

protected Filter m_filter

The Filter that will be used to define the entries maintained in this view.

m_listener

protected MapListener<? super K,? super V_FRONT> m_listener

The MapListener that will receive all the events from the view, including those corresponding to its initial population.

m_mapper

protected ValueExtractor<? super V_BACK,? extends V_FRONT> m_mapper

The ValueExtractor that will be used to transform values retrieved from the underlying map before storing them locally; if specified, this view will become read-only.

m_fCacheValues

protected boolean m_fCacheValues

Flag controlling if the view will store both keys and values or only keys. true by default.

m_loader

protected ClassLoader m_loader

The View's ClassLoader.

Constructor Details

MapViewBuilder

protected MapViewBuilder(Supplier<NamedCache<K,V_BACK>> supplierNamedCache)

Construct a new ViewBuilder for the provided Supplier.

Parameters:

supplierNamedCache - the Supplier returning a NamedCache from which the view will be created

Method Details

filter

public MapViewBuilder<K,V_BACK,V_FRONT> filter(Filter filter)

The Filter that will be used to define the entries maintained in this view. If no Filter is specified, AlwaysFilter.INSTANCE will be used.

Parameters:

filter - the Filter that will be used to query the underlying NamedMap

Returns:

this MapViewBuilder

listener

public MapViewBuilder<K,V_BACK,V_FRONT> listener(MapListener<? super K,? super V_FRONT> listener)

The MapListener that will receive all events, including those that result from the initial population of the view.

Parameters:

listener - the MapListener that will receive all the events from the view, including those corresponding to its initial population.

Returns:

this MapViewBuilder

map

public MapViewBuilder<K,V_BACK,V_FRONT> map(ValueExtractor<? super V_BACK,? extends V_FRONT> mapper)

The ValueExtractor that this view will use to transform the results from the underlying map prior to storing them locally.

Parameters:

mapper - the ValueExtractor that will be used to transform values retrieved from the underlying map before storing them locally; if specified, this view will become read-only

Returns:

this MapViewBuilder

keys

public MapViewBuilder<K,V_BACK,V_FRONT> keys()

The resulting view will only map keys. NOTE: this is mutually exclusive with values().

Returns:

this MapViewBuilder

values

public MapViewBuilder<K,V_BACK,V_FRONT> values()

The resulting view with both map keys and values. NOTE: this is mutually exclusive with keys(), and the default.

Returns:

this MapViewBuilder

withClassLoader

public MapViewBuilder<K,V_BACK,V_FRONT> withClassLoader(ClassLoader loader)

The optional ClassLoader to use when performing serialization/de-serialization operations.

Parameters:

loader - the ClassLoader

Returns:

this MapViewBuilder

build

public NamedMap<K,V_FRONT> build()

Construct a view of the NamedMap provided to this builder.

Returns:

the view of the NamedMap provided to this builder