Maps.EntryTransformer (Guava: Google Core Libraries for Java 19.0-rc3 API)

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Summary:
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Detail:
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Method

Type Parameters:
K - the key type of the input and output entries
V1 - the value type of the input entry
V2 - the value type of the output entry

Enclosing class:

Maps
```
public static interface Maps.EntryTransformer<K,V1,V2>
```
A transformation of the value of a key-value pair, using both key and value as inputs. To apply the transformation to a map, use Maps.transformEntries(Map, EntryTransformer).

Since:

7.0

- Method Summary
  
  Methods
  Modifier and Type Method and Description
  
  V2 transformEntry(K key, V1 value)
  Determines an output value based on a key-value pair.

- Method Detail
  - transformEntry
```
V2 transformEntry(@Nullable
                K key,
                @Nullable
                V1 value)
```
    Determines an output value based on a key-value pair. This method is generally expected, but not absolutely required, to have the following properties:
    - Its execution does not cause any observable side effects.
    - The computation is consistent with equals; that is, Objects.equal(k1, k2) && Objects.equal(java.lang.Object, java.lang.Object)(v1, v2) implies that Objects.equal(transformer.transform(k1, v1), transformer.transform(k2, v2)).
    Throws:
    
    NullPointerException - if the key or value is null and this transformer does not accept null arguments

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