Package org.ametys.core.util

Class MapUtils

java.lang.Object

org.ametys.core.util.MapUtils

public final class MapUtils
extends Object

Utility methods for Maps

Field Summary

Fields

Modifier and Type	Field	Description
private static BinaryOperator<?>	__DEFAULT_MERGE_FUNCTION

Constructor Summary

Constructors

Modifier	Constructor	Description
private	MapUtils()

Method Summary

Modifier and Type	Method	Description
private static <V> BinaryOperator<V>	_defaultMergeFunction()
private static <K,V> Map<K,V>	_merge(BinaryOperator<V> mergeFunction, Stream<Map<? extends K,? extends V>> sequentialStreamOfMaps)
static <K,V> Map<K,V>	merge(BinaryOperator<V> mergeFunction, Map<? extends K,? extends V> map1, Map<? extends K,? extends V> map2)	Merges the entries of two maps into one map.
static <K,V> Map<K,V>	merge(BinaryOperator<V> mergeFunction, Map<? extends K,? extends V> map1, Map<? extends K,? extends V> map2, Map<? extends K,? extends V>... others)	Merges the entries of several maps into one map.
static <K,V> Map<K,V>	merge(Map<? extends K,? extends V> map1, Map<? extends K,? extends V> map2)	Merges the entries of two maps into one map.
static <K,V> Map<K,V>	merge(Map<? extends K,? extends V> map1, Map<? extends K,? extends V> map2, Map<? extends K,? extends V>... others)	Merges the entries of several maps into one map.

Methods inherited from class java.lang.Object

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

Field Detail

__DEFAULT_MERGE_FUNCTION

private static BinaryOperator<?> __DEFAULT_MERGE_FUNCTION

Constructor Detail

MapUtils

private MapUtils()

Method Detail

_defaultMergeFunction

private static <V> BinaryOperator<V> _defaultMergeFunction()

merge

public static <K,V> Map<K,V> merge(Map<? extends K,? extends V> map1,
                                               Map<? extends K,? extends V> map2)

Merges the entries of two maps into one map. Entries of the first one have the priority (i.e. kept if same keys) over ones of the second one.

Type Parameters:

K - The type of the keys

V - The type of the values

Parameters:

map1 - The first map (not modified)

map2 - The second map (not modified)

Returns:

The merged map

merge

@SafeVarargs
public static <K,V> Map<K,V> merge(Map<? extends K,? extends V> map1,
                                               Map<? extends K,? extends V> map2,
                                               Map<? extends K,? extends V>... others)

Merges the entries of several maps into one map. Entries of any input map one have the priority (i.e. kept if same keys) over ones of any following map.

Type Parameters:

K - The type of the keys

V - The type of the values

Parameters:

map1 - The first map (not modified)

map2 - The second map (not modified)

others - The other maps (not modified)

Returns:

The merged map

merge

public static <K,V> Map<K,V> merge(BinaryOperator<V> mergeFunction,
                                               Map<? extends K,? extends V> map1,
                                               Map<? extends K,? extends V> map2)

Merges the entries of two maps into one map.

Type Parameters:

K - The type of the keys

V - The type of the values

Parameters:

mergeFunction - The merging function, to determine which value of the entry to keep when same keys are encountered.

map1 - The first map (not modified)

map2 - The second map (not modified)

Returns:

The merged map

merge

@SafeVarargs
public static <K,V> Map<K,V> merge(BinaryOperator<V> mergeFunction,
                                               Map<? extends K,? extends V> map1,
                                               Map<? extends K,? extends V> map2,
                                               Map<? extends K,? extends V>... others)

Merges the entries of several maps into one map. Entries of any input map one have the priority (i.e. kept if same keys) over ones of any following map.

Type Parameters:

K - The type of the keys

V - The type of the values

Parameters:

mergeFunction - The merging function, to determine which value of the entry to keep when same keys are encountered.

map1 - The first map (not modified)

map2 - The second map (not modified)

others - The other maps (not modified)

Returns:

The merged map

_merge

private static <K,V> Map<K,V> _merge(BinaryOperator<V> mergeFunction,
                                                 Stream<Map<? extends K,? extends V>> sequentialStreamOfMaps)