## org.apache.lucene.util.cache
Class SimpleMapCache

    java.lang.Object
      org.apache.lucene.util.cache.Cache
          org.apache.lucene.util.cache.SimpleMapCache

Direct Known Subclasses:
  SimpleLRUCache

    public class SimpleMapCache

extends Cache

Simple cache implementation that uses a HashMap to store (key, value) pairs. This cache is not synchronized, use `Cache.synchronizedCache(Cache)` if needed.

Constructor Summary
`SimpleMapCache()`
`SimpleMapCache(Map map)`

Method Summary
`void` `close()` Closes the cache.
`boolean` `containsKey(Object key)` Returns whether the given key is in this cache.
`Object` `get(Object key)` Returns the value for the given key.
`Set` `keySet()` Returns a Set containing all keys in this cache.
`void` `put(Object key, Object value)` Puts a (key, value)-pair into the cache.

Methods inherited from class org.apache.lucene.util.cache.Cache
`synchronizedCache`

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

Constructor Detail

### SimpleMapCache

    public SimpleMapCache()

### SimpleMapCache

    public SimpleMapCache(Map map)

Method Detail

### get

    public Object get(Object key)

  Description copied from class: `Cache`
  Returns the value for the given key.

  Specified by:
    `get` in class `Cache`

### put

    public void put(Object key,
                    Object value)

  Description copied from class: `Cache`
  Puts a (key, value)-pair into the cache.

  Specified by:
    `put` in class `Cache`

### close

    public void close()

  Description copied from class: `Cache`
  Closes the cache.

  Specified by:
    `close` in class `Cache`

### containsKey

    public boolean containsKey(Object key)

  Description copied from class: `Cache`
  Returns whether the given key is in this cache.

  Specified by:
    `containsKey` in class `Cache`

### keySet

    public Set keySet()

  Returns a Set containing all keys in this cache.

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