Package com.itextpdf.commons.utils
Class MapUtil
java.lang.Object
com.itextpdf.commons.utils.MapUtil
Utility class for work with collections. Not for public use.
-
Field Summary
Fields -
Constructor Summary
Constructors -
Method Summary
Modifier and TypeMethodDescriptionstatic <K,
V> boolean Checks if twomaps
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 themap
.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.
-
Field Details
-
HASH_MULTIPLIER
private static final int HASH_MULTIPLIER- See Also:
-
-
Constructor Details
-
MapUtil
private MapUtil()
-
-
Method Details
-
equals
Checks if twomaps
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 keysV
- is a type of values- Parameters:
m1
- is the first mapm2
- is the second map- Returns:
true
if maps are equal andfalse
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 keysV
- 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
Calculates the hash code of themap
.- Type Parameters:
K
- is a type of keysV
- is a type of values- Parameters:
m1
- is the map- Returns:
- the hash code of the
map
.
-
putIfNotNull
Puts value to map if the value is not null.- Type Parameters:
K
- is a type of keyV
- is a type of value- Parameters:
map
- the map in which value can be pushedkey
- the keyvalue
- the value
-