org.apache.xerces.util

Class ShadowedSymbolTable

java.lang.Object

org.apache.xerces.util.SymbolTable

org.apache.xerces.util.ShadowedSymbolTable

public final class ShadowedSymbolTable
extends SymbolTable

Shadowed symbol table. The table has a reference to the main symbol table and is not allowed to add new symbols to the main symbol table. New symbols are added to the shadow symbol table and are local to the component using this table.

Version:

$Id$

Author:

Andy Clark IBM

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.xerces.util.SymbolTable

SymbolTable.Entry

Field Summary

Fields

Modifier and Type	Field and Description
protected SymbolTable	fSymbolTable Main symbol table.

Fields inherited from class org.apache.xerces.util.SymbolTable

fBuckets, fCollisionThreshold, fCount, fHashMultipliers, fLoadFactor, fTableSize, fThreshold, MAX_HASH_COLLISIONS, MULTIPLIERS_MASK, MULTIPLIERS_SIZE, TABLE_SIZE

Constructor Summary

Constructors

Constructor and Description
ShadowedSymbolTable(SymbolTable symbolTable) Constructs a shadow of the specified symbol table.

Method Summary

Methods

Modifier and Type	Method and Description
String	addSymbol(char[] buffer, int offset, int length) Adds the specified symbol to the symbol table and returns a reference to the unique symbol.
String	addSymbol(String symbol) Adds the specified symbol to the symbol table and returns a reference to the unique symbol.
int	hash(char[] buffer, int offset, int length) Returns a hashcode value for the specified symbol information.
int	hash(String symbol) Returns a hashcode value for the specified symbol.

Methods inherited from class org.apache.xerces.util.SymbolTable

containsSymbol, containsSymbol, rebalance, rehash

Methods inherited from class java.lang.Object

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

Field Detail

fSymbolTable

protected SymbolTable fSymbolTable

Main symbol table.

Constructor Detail

ShadowedSymbolTable

public ShadowedSymbolTable(SymbolTable symbolTable)

Constructs a shadow of the specified symbol table.

Method Detail

addSymbol

public String addSymbol(String symbol)

Adds the specified symbol to the symbol table and returns a reference to the unique symbol. If the symbol already exists, the previous symbol reference is returned instead, in order guarantee that symbol references remain unique.

Overrides:

addSymbol in class SymbolTable

Parameters:

symbol - The new symbol.

addSymbol

public String addSymbol(char[] buffer,
               int offset,
               int length)

Adds the specified symbol to the symbol table and returns a reference to the unique symbol. If the symbol already exists, the previous symbol reference is returned instead, in order guarantee that symbol references remain unique.

Overrides:

addSymbol in class SymbolTable

Parameters:

buffer - The buffer containing the new symbol.

offset - The offset into the buffer of the new symbol.

length - The length of the new symbol in the buffer.

hash

public int hash(String symbol)

Returns a hashcode value for the specified symbol. The value returned by this method must be identical to the value returned by the hash(char[],int,int) method when called with the character array that comprises the symbol string.

Overrides:

hash in class SymbolTable

Parameters:

symbol - The symbol to hash.

hash

public int hash(char[] buffer,
       int offset,
       int length)

Returns a hashcode value for the specified symbol information. The value returned by this method must be identical to the value returned by the hash(String) method when called with the string object created from the symbol information.

Overrides:

hash in class SymbolTable

Parameters:

buffer - The character buffer containing the symbol.

offset - The offset into the character buffer of the start of the symbol.

length - The length of the symbol.