DDPartialKeyCache

```
public interface DDPartialKeyCache<K, V>

                    
```
Cache that can work on parts of a key to look up a value.
An example would be looking up values from a substring of a string instead of first creating a string to do the lookup.

Nested Class Summary

Nested Classes
Modifier and Type	Class	Description
`public interface`	`DDPartialKeyCache.Hasher`
`public interface`	`DDPartialKeyCache.Comparator`
`public interface`	`DDPartialKeyCache.Producer`

Method Summary

Modifier and Type	Method	Description
`abstract V`	`computeIfAbsent(K key, int m, int n, DDPartialKeyCache.Hasher<K> hasher, DDPartialKeyCache.Comparator<K, V> comparator, DDPartialKeyCache.Producer<K, out V> producer)`	Look up or create and store a value in the cache.
`abstract void`	`clear()`	Clear the cache.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Method Detail
  - computeIfAbsent
```
 abstract V computeIfAbsent(K key, int m, int n, DDPartialKeyCache.Hasher<K> hasher, DDPartialKeyCache.Comparator<K, V> comparator, DDPartialKeyCache.Producer<K, out V> producer)
```
    Look up or create and store a value in the cache.
    
    Parameters:
    
    key - the key to look up
    
    m - extra parameter that is passed along with the key
    
    n - extra parameter that is passed along with the key
    
    hasher - how to compute the hash using key, m, and n
    
    comparator - how to compare the key, m, n, and value
    
    producer - how to create a cached value base on the key, m, and n if the lookup fails
  - clear
```
 abstract void clear()
```
    Clear the cache.