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Java Source Code / Java Documentation » Web Server » Jigsaw » org.w3c.util

Source Cross Reference Class Diagram Java Document (Java Doc)

java.lang .Object

org.w3c.util .LookupTable

LookupTable
public class LookupTable implements Cloneable,Serializable(Code)
	A kind of hashtable (maps keys to values), useful for a limited number of elements. version: $Revision: 1.3 $ author: Beno�t Mah� (bmahe@w3.org)

Field Summary
final public static int	DEFAULT_CAPACITY The default capacity.

Constructor Summary
public	LookupTable(int capacity) Constructor.
public	LookupTable() Constructor, build a LookupTable with a initial capacity set to DEFAULT_CAPACITY.

Method Summary
public synchronized void	clear() Clears this lookuptable so that it contains no keys.
public synchronized Object	clone() Creates a shallow copy of this lookuptable.
public synchronized boolean	contains(Object value) Tests if some key maps into the specified value in this lookuptable. Parameters: value - a value to search for.
public synchronized boolean	containsKey(Object key) Tests if the specified object is a key in this lookuptable. Parameters: key - possible key.
public synchronized Enumeration	elements() Returns an enumeration of the values in this lookuptable.
public synchronized Object	get(Object key) Returns the value to which the specified key is mapped in this lookuptable. Parameters: key - a key in the lookuptable.
protected void	grow() Increases the capacity.
public boolean	isEmpty() Tests if this lookuptable maps no keys to values.
public synchronized Enumeration	keys() Returns an enumeration of the keys in this lookuptable.
public synchronized Object	put(Object key, Object value) Maps the specified `key` to the specified `value` in this lookuptable.
public synchronized Object	remove(Object key) Removes the key (and its corresponding value) from this lookuptable.
public int	size() Returns the number of keys in this lookuptable.
public synchronized String	toString() Returns a string representation of this `Lookuptable` object in the form of a set of entries, enclosed in braces and separated by the ASCII characters "`,` " (comma and space).

Field Detail

DEFAULT_CAPACITY
final public static int DEFAULT_CAPACITY(Code)
	The default capacity.

Constructor Detail

LookupTable
public LookupTable(int capacity)(Code)
	Constructor. Parameters: capacity - the initial capacity

LookupTable
public LookupTable()(Code)
	Constructor, build a LookupTable with a initial capacity set to DEFAULT_CAPACITY.

Method Detail

clear
public synchronized void clear()(Code)
	Clears this lookuptable so that it contains no keys.

clone
public synchronized Object clone()(Code)
	Creates a shallow copy of this lookuptable. All the structure of the lookuptable itself is copied, but the keys and values are not cloned. This is a relatively expensive operation. a clone of the lookuptable.

contains
public synchronized boolean contains(Object value)(Code)
	Tests if some key maps into the specified value in this lookuptable. Parameters: value - a value to search for. `true` if and only if some key maps to the`value` argument in this lookuptable as determined by the `equals` method;`false` otherwise. exception: NullPointerException - if the value is `null`. See Also: LookupTable.containsKey(Object)

containsKey
public synchronized boolean containsKey(Object key)(Code)
	Tests if the specified object is a key in this lookuptable. Parameters: key - possible key. `true` if and only if the specified object is a key in this lookuptable, as determined by the `equals` method; `false` otherwise. See Also: LookupTable.contains(Object)

elements
public synchronized Enumeration elements()(Code)
	Returns an enumeration of the values in this lookuptable. Use the Enumeration methods on the returned object to fetch the elements sequentially. an enumeration of the values in this lookuptable. See Also: java.util.Enumeration See Also: LookupTable.keys()

get
public synchronized Object get(Object key)(Code)
	Returns the value to which the specified key is mapped in this lookuptable. Parameters: key - a key in the lookuptable. the value to which the key is mapped in this lookuptable;`null` if the key is not mapped to any value inthis lookuptable. See Also: LookupTable.put(Object,Object)

grow
protected void grow()(Code)
	Increases the capacity. This method is called automatically when the number of keys in the lookuptable exceeds this lookuptable's capacity.

isEmpty
public boolean isEmpty()(Code)
	Tests if this lookuptable maps no keys to values. `true` if this lookuptable maps no keys to values;`false` otherwise.

keys
public synchronized Enumeration keys()(Code)
	Returns an enumeration of the keys in this lookuptable. an enumeration of the keys in this lookuptable. See Also: java.util.Enumeration See Also: LookupTable.elements()

put
public synchronized Object put(Object key, Object value)(Code)
	Maps the specified `key` to the specified `value` in this lookuptable. Neither the key nor the value can be `null`. The value can be retrieved by calling the `get` method with a key that is equal to the original key. Parameters: key - the lookuptable key. Parameters: value - the value. the previous value of the specified key in this lookuptable,or `null` if it did not have one. exception: NullPointerException - if the key or value is`null`. See Also: Object.equals(Object) See Also: LookupTable.get(Object)

remove
public synchronized Object remove(Object key)(Code)
	Removes the key (and its corresponding value) from this lookuptable. This method does nothing if the key is not in the lookuptable. Parameters: key - the key that needs to be removed. the value to which the key had been mapped in this lookuptable,or `null` if the key did not have a mapping.

size
public int size()(Code)
	Returns the number of keys in this lookuptable. the number of keys in this lookuptable.

toString
public synchronized String toString()(Code)
	Returns a string representation of this `Lookuptable` object in the form of a set of entries, enclosed in braces and separated by the ASCII characters "`,` " (comma and space). Each entry is rendered as the key, an equals sign `=`, and the associated element, where the `toString` method is used to convert the key and element to strings. Overrides to `toString` method of `Object`. a string representation of this lookuptable.

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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