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Java Source Code / Java Documentation » GIS » GeoTools 2.4.1 » org.geotools.util

Source Cross Reference

Class Diagram

Java Document (Java Doc)

java.lang .Object

java.util .AbstractMap

org.geotools.util .WeakValueHashMap

WeakValueHashMap
public class WeakValueHashMap extends AbstractMap (Code)
	A hashtable-based Map implementation with weak values. An entry in a WeakValueHashMap will automatically be removed when its value is no longer in ordinary use. This class is similar to the standard WeakHashMap class provided is J2SE, except that weak references are hold on values instead of keys. The WeakValueHashMap class is thread-safe. since: 2.0 version: $Id: WeakValueHashMap.java 27862 2007-11-12 19:51:19Z desruisseaux $ author: Martin Desruisseaux See Also: WeakHashMap See Also: WeakHashSet

Constructor Summary
public	WeakValueHashMap() Construct a WeakValueHashMap .
public	WeakValueHashMap(int initialSize) Create a WeakValueHashMap of the requested size.
public	WeakValueHashMap(Map map) Create a new WeakValueHashMap populated with the contents of the provied map.

Method Summary
public synchronized void	clear() Removes all of the elements from this map.
public boolean	containsKey(Object key) Returns true if this map contains a mapping for the specified key. Parameters: key - key whose presence in this map is to be tested.
public synchronized boolean	containsValue(Object value) Returns true if this map maps one or more keys to this value. Parameters: value - value whose presence in this map is to be tested.
public Set	entrySet() Returns a set view of the mappings contained in this map.
public synchronized Object	get(Object key) Returns the value to which this map maps the specified key.
public Object	put(Object key, Object value) Associates the specified value with the specified key in this map. The value is associated using a WeakReference . Parameters: key - key with which the specified value is to be associated. Parameters: value - value to be associated with the specified key.
public Object	remove(Object key) Removes the mapping for this key from this map if present. Parameters: key - key whose mapping is to be removed from the map.
public synchronized int	size() Returns the number of key-value mappings in this map.

Constructor Detail

WeakValueHashMap
public WeakValueHashMap()(Code)
	Construct a WeakValueHashMap .

WeakValueHashMap
public WeakValueHashMap(int initialSize)(Code)
	Create a WeakValueHashMap of the requested size. Parameters: initialSize -

WeakValueHashMap
public WeakValueHashMap(Map map)(Code)
	Create a new WeakValueHashMap populated with the contents of the provied map. Parameters: map - Initial contents of the WeakValueHashMap

Method Detail

clear
public synchronized void clear()(Code)
	Removes all of the elements from this map.

containsKey
public boolean containsKey(Object key)(Code)
	Returns true if this map contains a mapping for the specified key. Parameters: key - key whose presence in this map is to be tested. true if this map contains a mapping for the specified key. throws: NullPointerException - If key is null .

containsValue
public synchronized boolean containsValue(Object value)(Code)
	Returns true if this map maps one or more keys to this value. Parameters: value - value whose presence in this map is to be tested. true if this map maps one or more keys to this value.

entrySet
public Set entrySet()(Code)
	Returns a set view of the mappings contained in this map. Each element in this set is a java.util.Map.Entry . The current implementation thrown UnsupportedOperationException . a set view of the mappings contained in this map.

get
public synchronized Object get(Object key)(Code)
	Returns the value to which this map maps the specified key. Returns null if the map contains no mapping for this key. Parameters: key - Key whose associated value is to be returned. The value to which this map maps the specified key. throws: NullPointerException - if the key is null .

put
public Object put(Object key, Object value)(Code)
	Associates the specified value with the specified key in this map. The value is associated using a WeakReference . Parameters: key - key with which the specified value is to be associated. Parameters: value - value to be associated with the specified key. previous value associated with specified key, or null if there was no mapping for key. throws: NullPointerException - if the key or the value is null .

remove
public Object remove(Object key)(Code)
	Removes the mapping for this key from this map if present. Parameters: key - key whose mapping is to be removed from the map. previous value associated with specified key, or null if there was no entry for key.

size
public synchronized int size()(Code)
	Returns the number of key-value mappings in this map.

Methods inherited from java.util.AbstractMap

public void clear()(Code)(Java Doc)
protected Object clone() throws CloneNotSupportedException(Code)(Java Doc)
public boolean containsKey(Object key)(Code)(Java Doc)
public boolean containsValue(Object value)(Code)(Java Doc)
abstract public Set<Entry<K, V>> entrySet()(Code)(Java Doc)
public boolean equals(Object o)(Code)(Java Doc)
public V get(Object key)(Code)(Java Doc)
public int hashCode()(Code)(Java Doc)
public boolean isEmpty()(Code)(Java Doc)
public Set<K> keySet()(Code)(Java Doc)
public V put(K key, V value)(Code)(Java Doc)
public void putAll(Map<? extends K, ? extends V> m)(Code)(Java Doc)
public V remove(Object key)(Code)(Java Doc)
public int size()(Code)(Java Doc)
public String toString()(Code)(Java Doc)
public Collection<V> values()(Code)(Java Doc)

Methods inherited from java.lang.Object

native protected Object clone() throws CloneNotSupportedException(Code)(Java Doc)
public boolean equals(Object obj)(Code)(Java Doc)
protected void finalize() throws Throwable(Code)(Java Doc)
final native public Class getClass()(Code)(Java Doc)
native public int hashCode()(Code)(Java Doc)
final native public void notify()(Code)(Java Doc)
final native public void notifyAll()(Code)(Java Doc)
public String toString()(Code)(Java Doc)
final native public void wait(long timeout) throws InterruptedException(Code)(Java Doc)
final public void wait(long timeout, int nanos) throws InterruptedException(Code)(Java Doc)
final public void wait() throws InterruptedException(Code)(Java Doc)

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