org.w3c.rdf.implementation.model
Class LongTable

java.lang.Object
  |
  +--org.w3c.rdf.implementation.model.LongTable

public class LongTable

extends java.lang.Object

implements java.lang.Cloneable, java.io.Serializable

A hashtable specialized for storing keys of type long. Supports duplicates.

See Also:

Serialized Form

Constructor Summary

LongTable()
Constructs a new, empty hashtable with a default capacity and load factor.

LongTable(boolean multivalues)

LongTable(int initialCapacity)
Constructs a new, empty hashtable with the specified initial capacity and default load factor.

LongTable(int initialCapacity, float loadFactor, boolean multivalues)
Constructs a new, empty hashtable with the specified initial capacity and the specified load factor.

Method Summary

void	clear() Clears this hashtable so that it contains no keys.
java.lang.Object	clone() Creates a shallow copy of this hashtable.
boolean	contains(long hash, java.lang.Object value)
boolean	contains(java.lang.Object value) Tests if some key maps into the specified value in this hashtable.
boolean	containsKey(long hash) Tests if the specified object is a key in this hashtable.
java.util.Enumeration	elements() Returns an enumeration of the values in this hashtable.
java.lang.Object	get(long hash) Returns the value to which the specified key is mapped in this hashtable.
boolean	isEmpty() Tests if this hashtable maps no keys to values.
org.w3c.rdf.implementation.model.LongTable.LongEnumeration	keys() Returns an enumeration of the keys in this hashtable.
static void	main(java.lang.String[] args)
java.util.Enumeration	multiget(long key)
int	multigetsize(long key)
java.lang.Object	put(long hash, java.lang.Object value) Maps the specified key to the specified value in this hashtable.
protected void	rehash() Rehashes the contents of the hashtable into a hashtable with a larger capacity.
java.lang.Object	remove(long hash) Removes the key (and its corresponding value) from this hashtable.
java.lang.Object	remove(long hash, java.lang.Object value)
int	size() Returns the number of keys in this hashtable.
java.lang.String	toString() Returns a rather long string representation of this hashtable.

Methods inherited from class java.lang.Object

equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

LongTable

public LongTable(int initialCapacity,
                 float loadFactor,
                 boolean multivalues)

Constructs a new, empty hashtable with the specified initial capacity and the specified load factor.

Parameters:

initialCapacity - the initial capacity of the hashtable.

loadFactor - a number between 0.0 and 1.0.

Throws:

java.lang.IllegalArgumentException - if the initial capacity is less than or equal to zero, or if the load factor is less than or equal to zero.

Since:

JDK1.0

LongTable

public LongTable(int initialCapacity)

Constructs a new, empty hashtable with the specified initial capacity and default load factor.

Parameters:

initialCapacity - the initial capacity of the hashtable.

Since:

JDK1.0

LongTable

public LongTable()

Constructs a new, empty hashtable with a default capacity and load factor.

Since:

JDK1.0

LongTable

public LongTable(boolean multivalues)

Method Detail

size

public int size()

Returns the number of keys in this hashtable.

Returns:

the number of keys in this hashtable.

Since:

JDK1.0

isEmpty

public boolean isEmpty()

Tests if this hashtable maps no keys to values.

Returns:

true if this hashtable maps no keys to values; false otherwise.

Since:

JDK1.0

keys

public org.w3c.rdf.implementation.model.LongTable.LongEnumeration keys()

Returns an enumeration of the keys in this hashtable.

Returns:

an enumeration of the keys in this hashtable.

Since:

JDK1.0

See Also:

Enumeration, java.util.LongTable#elements()

elements

public java.util.Enumeration elements()

Returns an enumeration of the values in this hashtable. Use the Enumeration methods on the returned object to fetch the elements sequentially.

Returns:

an enumeration of the values in this hashtable.

Since:

JDK1.0

See Also:

Enumeration, java.util.LongTable#keys()

multiget

public java.util.Enumeration multiget(long key)

multigetsize

public int multigetsize(long key)

contains

public boolean contains(java.lang.Object value)

Tests if some key maps into the specified value in this hashtable. This operation is more expensive than the containsKey method.

Parameters:

value - a value to search for.

Returns:

true if some key maps to the value argument in this hashtable; false otherwise.

Throws:

NullPointerException - if the value is null.

Since:

JDK1.0

See Also:

java.util.LongTable#containsKey(java.lang.Object)

containsKey

public boolean containsKey(long hash)

Tests if the specified object is a key in this hashtable.

Parameters:

key - possible key.

Returns:

true if the specified object is a key in this hashtable; false otherwise.

Since:

JDK1.0

See Also:

java.util.LongTable#contains(java.lang.Object)

contains

public boolean contains(long hash,
                        java.lang.Object value)

get

public java.lang.Object get(long hash)

Returns the value to which the specified key is mapped in this hashtable.

Parameters:

key - a key in the hashtable.

Returns:

the value to which the key is mapped in this hashtable; null if the key is not mapped to any value in this hashtable.

Since:

JDK1.0

See Also:

java.util.LongTable#put(java.lang.Object, java.lang.Object)

rehash

protected void rehash()

Rehashes the contents of the hashtable into a hashtable with a larger capacity. This method is called automatically when the number of keys in the hashtable exceeds this hashtable's capacity and load factor.

Since:

JDK1.0

put

public java.lang.Object put(long hash,
                            java.lang.Object value)

Maps the specified key to the specified value in this hashtable. 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 hashtable key.

value - the value.

Returns:

the previous value of the specified key in this hashtable, or null if it did not have one.

Throws:

NullPointerException - if the key or value is null.

Since:

JDK1.0

See Also:

Object.equals(java.lang.Object), java.util.LongTable#get(java.lang.Object)

remove

public java.lang.Object remove(long hash)

Removes the key (and its corresponding value) from this hashtable. This method does nothing if the key is not in the hashtable.

Parameters:

key - the key that needs to be removed.

Returns:

the value to which the key had been mapped in this hashtable, or null if the key did not have a mapping.

Since:

JDK1.0

remove

public java.lang.Object remove(long hash,
                               java.lang.Object value)

clear

public void clear()

Clears this hashtable so that it contains no keys.

Since:

JDK1.0

clone

public java.lang.Object clone()

Creates a shallow copy of this hashtable. The keys and values themselves are not cloned. This is a relatively expensive operation.

Returns:

a clone of the hashtable.

Overrides:

clone in class java.lang.Object

Since:

JDK1.0

toString

public java.lang.String toString()

Returns a rather long string representation of this hashtable.

Returns:

a string representation of this hashtable.

Overrides:

toString in class java.lang.Object

Since:

JDK1.0

main

public static void main(java.lang.String[] args)