com.itextpdf.commons.utils

Class MapUtil

java.lang.Object

com.itextpdf.commons.utils.MapUtil

public final class MapUtil
extends Object

Utility class for work with collections. Not for public use.

Method Summary

Modifier and Type	Method and Description
static <K,V> boolean	equals(Map<K,V> m1, Map<K,V> m2) Checks if two maps are equal: the are of the same types and has equal number of stored entries and both has the same set of keys ans each key is associated with an appropriate value.
static <K,V> int	getHashCode(Map<K,V> m1) Calculates the hash code of the map.
static <K,V> void	merge(Map<K,V> destination, Map<K,V> source, BiFunction<V,V,V> valuesMerger) Merges data from source Map into destination Map using provided function if key exists in both Maps.
static <K,V> void	putIfNotNull(Map<K,V> map, K key, V value) Puts value to map if the value is not null.

Methods inherited from class java.lang.Object

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

Method Detail

equals

public static <K,V> boolean equals(Map<K,V> m1,
                                   Map<K,V> m2)

Checks if two maps are equal: the are of the same types and has equal number of stored entries and both has the same set of keys ans each key is associated with an appropriate value.

Type Parameters:

K - is a type of keys

V - is a type of values

Parameters:

m1 - is the first map

m2 - is the second map

Returns:

true if maps are equal and false otherwise

merge

public static <K,V> void merge(Map<K,V> destination,
                               Map<K,V> source,
                               BiFunction<V,V,V> valuesMerger)

Merges data from source Map into destination Map using provided function if key exists in both Maps. If key doesn't exist in destination Map in will be putted directly.

Type Parameters:

K - is a type of keys

V - is a type of values

Parameters:

destination - Map to which data will be merged.

source - Map from which data will be taken.

valuesMerger - function which will be used to merge Maps values.

getHashCode

public static <K,V> int getHashCode(Map<K,V> m1)

Calculates the hash code of the map.

Type Parameters:

K - is a type of keys

V - is a type of values

Parameters:

m1 - is the map

Returns:

the hash code of the map.

putIfNotNull

public static <K,V> void putIfNotNull(Map<K,V> map,
                                      K key,
                                      V value)

Puts value to map if the value is not null.

Type Parameters:

K - is a type of key

V - is a type of value

Parameters:

map - the map in which value can be pushed

key - the key

value - the value