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package com.sun.org.apache.xerces.internal.util;

Synchronized symbol table.
This class moved into the util package since it's needed by multiple
other classes (CachingParserPool, XMLGrammarCachingConfiguration).
Author:
Andy Clark, IBM/**
 * Synchronized symbol table.
 *
 * This class moved into the util package since it's needed by multiple
 * other classes (CachingParserPool, XMLGrammarCachingConfiguration).
 *
 * @author Andy Clark, IBM
 */

public final class SynchronizedSymbolTable
    extends SymbolTable {

    //
    // Data
    //

    
Main symbol table. /** Main symbol table. */
    protected SymbolTable fSymbolTable;

    //
    // Constructors
    //

    
Constructs a synchronized symbol table. /** Constructs a synchronized symbol table. */
    public SynchronizedSymbolTable(SymbolTable symbolTable) {
        fSymbolTable = symbolTable;
    } // <init>(SymbolTable)

    // construct synchronized symbol table of default size
    public SynchronizedSymbolTable() {
        fSymbolTable = new SymbolTable();
    } // init()

    // construct synchronized symbol table of given size
    public SynchronizedSymbolTable(int size) {
        fSymbolTable = new SymbolTable(size);
    } // init(int)

    //
    // SymbolTable methods
    //

    
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.
Params:
symbol – The new 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.
     *
     * @param symbol The new symbol.
     */
    public String addSymbol(String symbol) {

        synchronized (fSymbolTable) {
            return fSymbolTable.addSymbol(symbol);
        }

    } // addSymbol(String)

    
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.
Params:
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./**
     * 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.
     *
     * @param buffer The buffer containing the new symbol.
     * @param offset The offset into the buffer of the new symbol.
     * @param length The length of the new symbol in the buffer.
     */
    public String addSymbol(char[] buffer, int offset, int length) {

        synchronized (fSymbolTable) {
            return fSymbolTable.addSymbol(buffer, offset, length);
        }

    } // addSymbol(char[],int,int):String

    
Returns true if the symbol table already contains the specified
symbol.
Params:
symbol – The symbol to look for./**
     * Returns true if the symbol table already contains the specified
     * symbol.
     *
     * @param symbol The symbol to look for.
     */
    public boolean containsSymbol(String symbol) {

        synchronized (fSymbolTable) {
            return fSymbolTable.containsSymbol(symbol);
        }

    } // containsSymbol(String):boolean

    
Returns true if the symbol table already contains the specified
symbol.
Params:
buffer – The buffer containing the symbol to look for.
offset – The offset into the buffer.
length – The length of the symbol in the buffer./**
     * Returns true if the symbol table already contains the specified
     * symbol.
     *
     * @param buffer The buffer containing the symbol to look for.
     * @param offset The offset into the buffer.
     * @param length The length of the symbol in the buffer.
     */
    public boolean containsSymbol(char[] buffer, int offset, int length) {

        synchronized (fSymbolTable) {
            return fSymbolTable.containsSymbol(buffer, offset, length);
        }

    } // containsSymbol(char[],int,int):boolean

} // class SynchronizedSymbolTable