com.tangosol.util

Interface QueryMap.Entry<K,V>

Type Parameters:

K - the type of the Map entry keys

V - the type of the Map entry values

All Superinterfaces:

Map.Entry<K,V>

All Known Subinterfaces:

BinaryEntry<K,V>, InvocableMap.Entry<K,V>, MapTrigger.Entry<K,V>

All Known Implementing Classes:

AbstractKeyBasedMap.EntrySet.Entry, BackingMapBinaryEntry, BinaryMap.Entry, ConverterCollections.ConverterMapEvent.ConverterMapEventBinaryEntry, InvocableMapHelper.RoutingBinaryEntry, InvocableMapHelper.RoutingMapTriggerEntry, InvocableMapHelper.SimpleEntry, ObservableSplittingBackingCache.EntrySet.Entry, OpenHashMap.EntrySet.Entry, ReadWriteBackingMap.Entry, SerializationCache.EntrySet.Entry, SimpleElement.AttributeMap.Entry, SimpleMapEntry

Enclosing interface:

QueryMap<K,V>

public static interface QueryMap.Entry<K,V>
extends Map.Entry<K,V>

A QueryMap Entry exposes additional index-related operation that the basic Map Entry does not.

Since:

Coherence 3.2

Method Summary

Modifier and Type	Method and Description
<T,E> E	extract(ValueExtractor<T,E> extractor) Extract a value out of the Entry's key or value.
default <E> E	extractFromKey(ValueExtractor<? super K,E> extractor) Extract a value out of the Entry's key.
default <E> E	extractFromValue(ValueExtractor<? super V,E> extractor) Extract a value out of the Entry's value.

Methods inherited from interface java.util.Map.Entry

comparingByKey, comparingByKey, comparingByValue, comparingByValue, equals, getKey, getValue, hashCode, setValue

Method Detail

extract

<T,E> E extract(ValueExtractor<T,E> extractor)

Extract a value out of the Entry's key or value. Calling this method is semantically equivalent to extractor.extract(entry.getValue()), but this method may be significantly less expensive. For example, the resultant value may be obtained from a forward index, avoiding a potential object de-serialization.

Type Parameters:

T - the type of the value to extract from

E - the type of value that will be extracted

Parameters:

extractor - a ValueExtractor to apply to the Entry's key or value

Returns:

the extracted value

extractFromKey

default <E> E extractFromKey(ValueExtractor<? super K,E> extractor)

Extract a value out of the Entry's key. Calling this method is semantically equivalent to extractor.extract(entry.getKey()), but this method may be significantly less expensive. For example, the resultant value may be obtained from a forward index, avoiding a potential object de-serialization.

Type Parameters:

E - the type of value that will be extracted

Parameters:

extractor - a ValueExtractor to apply to the Entry's key

Returns:

the extracted value

extractFromValue

default <E> E extractFromValue(ValueExtractor<? super V,E> extractor)

Extract a value out of the Entry's value. Calling this method is semantically equivalent to extractor.extract(entry.getValue()), but this method may be significantly less expensive. For example, the resultant value may be obtained from a forward index, avoiding a potential object de-serialization.

Type Parameters:

E - the type of value that will be extracted

Parameters:

extractor - a ValueExtractor to apply to the Entry's value

Returns:

the extracted value