Package com.itextpdf.commons.utils
Class MapUtil
- java.lang.Object
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- com.itextpdf.commons.utils.MapUtil
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public final class MapUtil extends java.lang.Object
Utility class for work with collections. Not for public use.
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Field Summary
Fields Modifier and Type Field Description private static int
HASH_MULTIPLIER
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Constructor Summary
Constructors Modifier Constructor Description private
MapUtil()
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Method Summary
All Methods Static Methods Concrete Methods Modifier and Type Method Description static <K,V>
booleanequals(java.util.Map<K,V> m1, java.util.Map<K,V> m2)
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>
intgetHashCode(java.util.Map<K,V> m1)
Calculates the hash code of themap
.static <K,V>
voidmerge(java.util.Map<K,V> destination, java.util.Map<K,V> source, java.util.function.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>
voidputIfNotNull(java.util.Map<K,V> map, K key, V value)
Puts value to map if the value is not null.
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Field Detail
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HASH_MULTIPLIER
private static final int HASH_MULTIPLIER
- See Also:
- Constant Field Values
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Method Detail
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equals
public static <K,V> boolean equals(java.util.Map<K,V> m1, java.util.Map<K,V> m2)
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
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merge
public static <K,V> void merge(java.util.Map<K,V> destination, java.util.Map<K,V> source, java.util.function.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.
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getHashCode
public static <K,V> int getHashCode(java.util.Map<K,V> m1)
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
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putIfNotNull
public static <K,V> void putIfNotNull(java.util.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 keyV
- is a type of value- Parameters:
map
- the map in which value can be pushedkey
- the keyvalue
- the value
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