Package org.infinispan.filter

Class CacheFilters

java.lang.Object

org.infinispan.filter.CacheFilters

public final class CacheFilters
extends java.lang.Object

Static factory class that contains utility methods that can be used for performing proper transformations from KeyValueFilter, Converter and KeyValueFilterConverter to appropriate distributed stream instances.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	CacheFilters.CacheFiltersExternalizer

Method Summary

Modifier and Type	Method	Description
static <K,V,C> java.util.stream.Stream<CacheEntry<K,C>>	filterAndConvert(java.util.stream.Stream<CacheEntry<K,V>> stream, KeyValueFilterConverter<? super K,? super V,C> filterConverter)	Adds needed intermediate operations to the provided stream, returning a possibly new stream as a result of the operations.
static <K,V,C> CacheStream<CacheEntry<K,C>>	filterAndConvert(CacheStream<CacheEntry<K,V>> stream, KeyValueFilterConverter<? super K,? super V,C> filterConverter)
static <K,V,C> java.util.function.Function<CacheEntry<K,V>,CacheEntry<K,C>>	function(Converter<? super K,? super V,C> converter)	Creates a new Function using the provided converter as a basis for the operation.
static <K,V> java.util.function.Predicate<CacheEntry<K,V>>	predicate(KeyValueFilter<? super K,? super V> filter)	Creates a new Predicate using the provided key value filter as a basis for the operation.

Methods inherited from class java.lang.Object

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

Method Detail

predicate

public static <K,V> java.util.function.Predicate<CacheEntry<K,V>> predicate(KeyValueFilter<? super K,? super V> filter)

Creates a new Predicate using the provided key value filter as a basis for the operation. This is useful for when using Stream.filter(Predicate) method on distributed streams. The key, value and metadata are all used to determine if the predicate returns true or not.

Type Parameters:

K - key type

V - value type

Parameters:

filter - the filter to utilize

Returns:

predicate based on the filter

function

public static <K,V,C> java.util.function.Function<CacheEntry<K,V>,CacheEntry<K,C>> function(Converter<? super K,? super V,C> converter)

Creates a new Function using the provided converter as a basis for the operation. This is useful for when using Stream.map(Function) method on distributed streams. The key, value and metadata are all used to determine the converted value.

Type Parameters:

K - key type

V - value type

C - convertered value type

Parameters:

converter - the converter to utilize

Returns:

function based on the converter

filterAndConvert

public static <K,V,C> java.util.stream.Stream<CacheEntry<K,C>> filterAndConvert(java.util.stream.Stream<CacheEntry<K,V>> stream,
                                                                                                  KeyValueFilterConverter<? super K,? super V,C> filterConverter)

Adds needed intermediate operations to the provided stream, returning a possibly new stream as a result of the operations. This method keeps the contract of filter and conversion being performed in only 1 call as the KeyValueFilterConverter was designed to do. The key, value and metadata are all used to determine whether the value is returned and the converted value.

Type Parameters:

K -

V -

C -

Parameters:

stream - stream to perform the operations on

filterConverter - converter to apply

Returns:

filterAndConvert

public static <K,V,C> CacheStream<CacheEntry<K,C>> filterAndConvert(CacheStream<CacheEntry<K,V>> stream,
                                                                                      KeyValueFilterConverter<? super K,? super V,C> filterConverter)