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package com.fasterxml.jackson.databind.util;
/**
* 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)
*/
public interface LookupCache
{
/**
* @return Number of entries currently in cache: may be approximate, only
* to be used for diagnostics, metrics reporting
*/
int size();
/**
* NOTE: key is of type Object only to retain binary backwards-compatibility
*
* @param key
* @return value associated with key (can return null)
*/
V get(Object key);
V put(K key, V value);
V putIfAbsent(K key, V value);
/**
* Method for removing all contents this cache has.
*/
void clear();
}