Package org.glassfish.jersey.internal.util.collection

Class Views

java.lang.Object

org.glassfish.jersey.internal.util.collection.Views

public class Views
extends Object

Collections utils, which provide transforming views for List and Map.

Author:

Pavel Bucek

Method Summary

Modifier and Type	Method	Description
static <T, R> List<T>	listView(List<R> originalList, Function<R,T> transformer)	Create a List view, which transforms the values of provided original list.
static <K, V, O> Map<K,V>	mapView(Map<K,O> originalMap, Function<O,V> valuesTransformer)	Create a Map view, which transforms the values of provided original map.
static <E> Set<E>	setDiffView(Set<? extends E> set1, Set<? extends E> set2)	Create a view of a difference of provided sets.
static <E> Set<E>	setUnionView(Set<? extends E> set1, Set<? extends E> set2)	Create a view of an union of provided sets.

Methods inherited from class java.lang.Object

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

Method Details

listView

public static <T,
R> List<T> listView(List<R> originalList,
 Function<R,T> transformer)

Create a List view, which transforms the values of provided original list.

Removing elements from the view is supported, adding and setting isn't and throws UnsupportedOperationException when invoked.

Type Parameters:

T - transformed type parameter.

R - type of the element from provided list.

Parameters:

originalList - original list.

transformer - transforming functions.

Returns:

transformed list view.

mapView

public static <K,
V,
O> Map<K,V> mapView(Map<K,O> originalMap,
 Function<O,V> valuesTransformer)

Create a Map view, which transforms the values of provided original map.

Removing elements from the map view is supported, adding and setting isn't and throws UnsupportedOperationException when invoked.

Type Parameters:

K - key type.

V - transformed value type.

O - original value type.

Parameters:

originalMap - provided map.

valuesTransformer - values transformer.

Returns:

transformed map view.

setUnionView

public static <E> Set<E> setUnionView(Set<? extends E> set1,
 Set<? extends E> set2)

Create a view of an union of provided sets.

View is updated whenever any of the provided set changes.

Type Parameters:

E - set item type.

Parameters:

set1 - first set.

set2 - second set.

Returns:

union view of given sets.

setDiffView

public static <E> Set<E> setDiffView(Set<? extends E> set1,
 Set<? extends E> set2)

Create a view of a difference of provided sets.

View is updated whenever any of the provided set changes.

Type Parameters:

E - set item type.

Parameters:

set1 - first set.

set2 - second set.

Returns:

union view of given sets.