LookupCache (jackson-databind 2.12.7.2)

All Known Implementing Classes:

LRUMap
```
public interface LookupCache<K,V>
```
An interface describing the required API for the Jackson-databind Type cache.
Note that while interface itself does not specify synchronization requirements for implementations, specific use cases do. Typically implementations are expected to be thread-safe, that is, to handle synchronization.

Since:

2.12 (for forwards-compatiblity with 3.0)

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method and Description
`void`	`clear()` Method for removing all contents this cache has.
`V`	`get(Object key)` NOTE: key is of type Object only to retain binary backwards-compatibility
`V`	`put(K key, V value)`
`V`	`putIfAbsent(K key, V value)`
`int`	`size()`

- Method Detail
  - size
```
int size()
```
    Returns:
    
    Number of entries currently in cache: may be approximate, only to be used for diagnostics, metrics reporting
  - get
```
V get(Object key)
```
    NOTE: key is of type Object only to retain binary backwards-compatibility
    
    Parameters:
    
    key -
    
    Returns:
    
    value associated with key (can return null)
  - put
```
V put(K key,
      V value)
```
  - putIfAbsent
```
V putIfAbsent(K key,
              V value)
```
  - clear
```
void clear()
```
    Method for removing all contents this cache has.

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