org.apache.xerces.util
Class SymbolHash

java.lang.Object
  |
  +--org.apache.xerces.util.SymbolHash

public class SymbolHash

extends java.lang.Object

This class is an unsynchronized hash table primary used for String to Object mapping.

The hash code uses the same algorithm as SymbolTable class.

Version:

$Id: SymbolHash.java,v 1.8 2004/02/24 23:15:53 mrglavas Exp $

Author:

Elena Litani

Inner Class Summary

protected static class

SymbolHash.Entry This class is a key table entry.

Field Summary

protected SymbolHash.Entry[]	fBuckets Buckets.
protected int	fNum Number of elements.
protected int	fTableSize Default table size.

Constructor Summary

SymbolHash()
Constructs a key table with the default size.

SymbolHash(int size)
Constructs a key table with a given size.

Method Summary

void	clear() Remove all key/value assocaition.
java.lang.Object	get(java.lang.Object key) Get the value associated with the given key.
int	getLength() Get the number of key/value pairs stored in this table.
int	getValues(java.lang.Object[] elements, int from) Add all values to the given array.
SymbolHash	makeClone() Make a clone of this object.
void	put(java.lang.Object key, java.lang.Object value) Adds the key/value mapping to the key table.
protected SymbolHash.Entry	search(java.lang.Object key, int bucket)

Methods inherited from class java.lang.Object

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

Field Detail

fTableSize

protected int fTableSize

Default table size.

fBuckets

protected SymbolHash.Entry[] fBuckets

Buckets.

fNum

protected int fNum

Number of elements.

Constructor Detail

SymbolHash

public SymbolHash()

Constructs a key table with the default size.

SymbolHash

public SymbolHash(int size)

Constructs a key table with a given size.

Parameters:

size - the size of the key table.

Method Detail

put

public void put(java.lang.Object key,
                java.lang.Object value)

Adds the key/value mapping to the key table. If the key already exists, the previous value associated with this key is overwritten by the new value.

Parameters:

key -

value -

get

public java.lang.Object get(java.lang.Object key)

Get the value associated with the given key.

Parameters:

key -

Returns:

the value associated with the given key.

getLength

public int getLength()

Get the number of key/value pairs stored in this table.

Returns:

the number of key/value pairs stored in this table.

getValues

public int getValues(java.lang.Object[] elements,
                     int from)

Add all values to the given array. The array must have enough entry.

Parameters:

elements - the array to store the elements

from - where to start store element in the array

Returns:

number of elements copied to the array

makeClone

public SymbolHash makeClone()

Make a clone of this object.

clear

public void clear()

Remove all key/value assocaition. This tries to save a bit of GC'ing by at least keeping the fBuckets array around.

search

protected SymbolHash.Entry search(java.lang.Object key,
                                  int bucket)