001: /*
002: * The Apache Software License, Version 1.1
003: *
004: *
005: * Copyright (c) 2000-2002 The Apache Software Foundation. All rights
006: * reserved.
007: *
008: * Redistribution and use in source and binary forms, with or without
009: * modification, are permitted provided that the following conditions
010: * are met:
011: *
012: * 1. Redistributions of source code must retain the above copyright
013: * notice, this list of conditions and the following disclaimer.
014: *
015: * 2. Redistributions in binary form must reproduce the above copyright
016: * notice, this list of conditions and the following disclaimer in
017: * the documentation and/or other materials provided with the
018: * distribution.
019: *
020: * 3. The end-user documentation included with the redistribution,
021: * if any, must include the following acknowledgment:
022: * "This product includes software developed by the
023: * Apache Software Foundation (http://www.apache.org/)."
024: * Alternately, this acknowledgment may appear in the software itself,
025: * if and wherever such third-party acknowledgments normally appear.
026: *
027: * 4. The names "Xerces" and "Apache Software Foundation" must
028: * not be used to endorse or promote products derived from this
029: * software without prior written permission. For written
030: * permission, please contact apache@apache.org.
031: *
032: * 5. Products derived from this software may not be called "Apache",
033: * nor may "Apache" appear in their name, without prior written
034: * permission of the Apache Software Foundation.
035: *
036: * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
037: * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
038: * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
039: * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
040: * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
041: * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
042: * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
043: * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
044: * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
045: * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
046: * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
047: * SUCH DAMAGE.
048: * ====================================================================
049: *
050: * This software consists of voluntary contributions made by many
051: * individuals on behalf of the Apache Software Foundation and was
052: * originally based on software copyright (c) 1999, International
053: * Business Machines, Inc., http://www.apache.org. For more
054: * information on the Apache Software Foundation, please see
055: * <http://www.apache.org/>.
056: */
057:
058: package com.sun.xml.stream.xerces.util;
059:
060: /**
061: * Synchronized symbol table.
062: *
063: * This class moved into the util package since it's needed by multiple
064: * other classes (CachingParserPool, XMLGrammarCachingConfiguration).
065: *
066: * @author Andy Clark, IBM
067: * @version $Id: SynchronizedSymbolTable.java,v 1.2 2006/04/01 06:01:40 jeffsuttor Exp $
068: */
069:
070: public final class SynchronizedSymbolTable extends SymbolTable {
071:
072: //
073: // Data
074: //
075:
076: /** Main symbol table. */
077: protected SymbolTable fSymbolTable;
078:
079: //
080: // Constructors
081: //
082:
083: /** Constructs a synchronized symbol table. */
084: public SynchronizedSymbolTable(SymbolTable symbolTable) {
085: fSymbolTable = symbolTable;
086: } // <init>(SymbolTable)
087:
088: // construct synchronized symbol table of default size
089: public SynchronizedSymbolTable() {
090: fSymbolTable = new SymbolTable();
091: } // init()
092:
093: // construct synchronized symbol table of given size
094: public SynchronizedSymbolTable(int size) {
095: fSymbolTable = new SymbolTable(size);
096: } // init(int)
097:
098: //
099: // SymbolTable methods
100: //
101:
102: /**
103: * Adds the specified symbol to the symbol table and returns a
104: * reference to the unique symbol. If the symbol already exists,
105: * the previous symbol reference is returned instead, in order
106: * guarantee that symbol references remain unique.
107: *
108: * @param symbol The new symbol.
109: */
110: public String addSymbol(String symbol) {
111:
112: synchronized (fSymbolTable) {
113: return fSymbolTable.addSymbol(symbol);
114: }
115:
116: } // addSymbol(String)
117:
118: /**
119: * Adds the specified symbol to the symbol table and returns a
120: * reference to the unique symbol. If the symbol already exists,
121: * the previous symbol reference is returned instead, in order
122: * guarantee that symbol references remain unique.
123: *
124: * @param buffer The buffer containing the new symbol.
125: * @param offset The offset into the buffer of the new symbol.
126: * @param length The length of the new symbol in the buffer.
127: */
128: public String addSymbol(char[] buffer, int offset, int length) {
129:
130: synchronized (fSymbolTable) {
131: return fSymbolTable.addSymbol(buffer, offset, length);
132: }
133:
134: } // addSymbol(char[],int,int):String
135:
136: /**
137: * Returns true if the symbol table already contains the specified
138: * symbol.
139: *
140: * @param symbol The symbol to look for.
141: */
142: public boolean containsSymbol(String symbol) {
143:
144: synchronized (fSymbolTable) {
145: return fSymbolTable.containsSymbol(symbol);
146: }
147:
148: } // containsSymbol(String):boolean
149:
150: /**
151: * Returns true if the symbol table already contains the specified
152: * symbol.
153: *
154: * @param buffer The buffer containing the symbol to look for.
155: * @param offset The offset into the buffer.
156: * @param length The length of the symbol in the buffer.
157: */
158: public boolean containsSymbol(char[] buffer, int offset, int length) {
159:
160: synchronized (fSymbolTable) {
161: return fSymbolTable.containsSymbol(buffer, offset, length);
162: }
163:
164: } // containsSymbol(char[],int,int):boolean
165:
166: } // class SynchronizedSymbolTable
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