## edu.stanford.nlp.util
Class MapFactory<K,V>

    java.lang.Object
      edu.stanford.nlp.util.MapFactory<K,V>

All Implemented Interfaces:
  Serializable

    public abstract class MapFactory<K,V>

extends Object
implements Serializable

A factory class for vending different sorts of Maps.

Author:
  Dan Klein (klein@cs.stanford.edu), Kayur Patel (kdpatel@cs)
See Also:
  Serialized Form

Field Summary
`static MapFactory` `HASH_MAP_FACTORY`
`static MapFactory` `IDENTITY_HASH_MAP_FACTORY`

Method Summary

`static

`<K,V> MapFactory<K,V>`

`

`arrayMapFactory()`
Return a MapFactory that returns an ArrayMap.

`static

`<K,V> MapFactory<K,V>`

`

`hashMapFactory()`
Return a MapFactory that returns a HashMap.

`static

`<K,V> MapFactory<K,V>`

`

`identityHashMapFactory()`
Return a MapFactory that returns an IdentityHashMap.

`abstract Map<K,V>` `newMap()` Returns a new non-parameterized map of a particular sort.
`abstract Map<K,V>` `newMap(int initCapacity)` Returns a new non-parameterized map of a particular sort with an initial capacity.

`abstract

`<K1,V1> Map<K1,V1>`

`

`setMap(Map<K1,V1> map)`
A method to get a parameterized (genericized) map out.

`abstract

`<K1,V1> Map<K1,V1>`

`

`setMap(Map<K1,V1> map, int initCapacity)`

`static

`<K,V> MapFactory<K,V>`

`

`treeMapFactory()`
Return a MapFactory that returns an TreeMap.

`static

`<K,V> MapFactory<K,V>`

`

`weakHashMapFactory()`
Return a MapFactory that returns a WeakHashMap.

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

Field Detail

### HASH_MAP_FACTORY

    public static final MapFactory HASH_MAP_FACTORY

### IDENTITY_HASH_MAP_FACTORY

    public static final MapFactory IDENTITY_HASH_MAP_FACTORY

Method Detail

### hashMapFactory

    public static <K,V> MapFactory<K,V> hashMapFactory()

  Return a MapFactory that returns a HashMap. Implementation note: This method uses the same trick as the methods like emptyMap() introduced in the Collections class in JDK1.5 where callers can call this method with apparent type safety because this method takes the hit for the cast.

  Returns:
    A MapFactory that makes a HashMap.

### identityHashMapFactory

    public static <K,V> MapFactory<K,V> identityHashMapFactory()

  Return a MapFactory that returns an IdentityHashMap. Implementation note: This method uses the same trick as the methods like emptyMap() introduced in the Collections class in JDK1.5 where callers can call this method with apparent type safety because this method takes the hit for the cast.

  Returns:
    A MapFactory that makes a HashMap.

### weakHashMapFactory

    public static <K,V> MapFactory<K,V> weakHashMapFactory()

  Return a MapFactory that returns a WeakHashMap. Implementation note: This method uses the same trick as the methods like emptyMap() introduced in the Collections class in JDK1.5 where callers can call this method with apparent type safety because this method takes the hit for the cast.

  Returns:
    A MapFactory that makes a WeakHashMap.

### treeMapFactory

    public static <K,V> MapFactory<K,V> treeMapFactory()

  Return a MapFactory that returns an TreeMap. Implementation note: This method uses the same trick as the methods like emptyMap() introduced in the Collections class in JDK1.5 where callers can call this method with apparent type safety because this method takes the hit for the cast.

  Returns:
    A MapFactory that makes an ArrayMap.

### arrayMapFactory

    public static <K,V> MapFactory<K,V> arrayMapFactory()

  Return a MapFactory that returns an ArrayMap. Implementation note: This method uses the same trick as the methods like emptyMap() introduced in the Collections class in JDK1.5 where callers can call this method with apparent type safety because this method takes the hit for the cast.

  Returns:
    A MapFactory that makes an ArrayMap.

### newMap

    public abstract Map<K,V> newMap()

  Returns a new non-parameterized map of a particular sort.

  Returns:
    A new non-parameterized map of a particular sort

### newMap

    public abstract Map<K,V> newMap(int initCapacity)

  Returns a new non-parameterized map of a particular sort with an initial capacity.

  Parameters:
    `initCapacity` - initial capacity of the map
  Returns:
    A new non-parameterized map of a particular sort with an initial capacity

### setMap

    public abstract <K1,V1> Map<K1,V1> setMap(Map<K1,V1> map)

  A method to get a parameterized (genericized) map out.

  Parameters:
    `map` - A type-parameterized `Map` argument
  Returns:
    A `Map` with type-parameterization identical to that of the argument.

### setMap

    public abstract <K1,V1> Map<K1,V1> setMap(Map<K1,V1> map,
                                              int initCapacity)

Stanford NLP Group