| /* |
| * The Apache Software License, Version 1.1 |
| * |
| * |
| * Copyright (c) 1999-2003 The Apache Software Foundation. All rights |
| * reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in |
| * the documentation and/or other materials provided with the |
| * distribution. |
| * |
| * 3. The end-user documentation included with the redistribution, |
| * if any, must include the following acknowledgment: |
| * "This product includes software developed by the |
| * Apache Software Foundation (http://www.apache.org/)." |
| * Alternately, this acknowledgment may appear in the software itself, |
| * if and wherever such third-party acknowledgments normally appear. |
| * |
| * 4. The names "Xerces" and "Apache Software Foundation" must |
| * not be used to endorse or promote products derived from this |
| * software without prior written permission. For written |
| * permission, please contact apache@apache.org. |
| * |
| * 5. Products derived from this software may not be called "Apache", |
| * nor may "Apache" appear in their name, without prior written |
| * permission of the Apache Software Foundation. |
| * |
| * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED |
| * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
| * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR |
| * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF |
| * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND |
| * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, |
| * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT |
| * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| * SUCH DAMAGE. |
| * ==================================================================== |
| * |
| * This software consists of voluntary contributions made by many |
| * individuals on behalf of the Apache Software Foundation and was |
| * originally based on software copyright (c) 1999, International |
| * Business Machines, Inc., http://www.apache.org. For more |
| * information on the Apache Software Foundation, please see |
| * <http://www.apache.org/>. |
| */ |
| |
| package org.apache.xml.dtm.ref; |
| |
| |
| /** <p>Like DTMStringPool, but threadsafe. It's been proposed that DTMs |
| * share their string pool(s); that raises threadsafety issues which |
| * this addresses. Of course performance is inferior to that of the |
| * bare-bones version.</p> |
| * |
| * <p>Status: Passed basic test in main().</p> |
| * */ |
| public class DTMSafeStringPool |
| extends DTMStringPool |
| { |
| public synchronized void removeAllElements() |
| { |
| super.removeAllElements(); |
| } |
| |
| /** @return string whose value is uniquely identified by this integer index. |
| * @throws java.lang.ArrayIndexOutOfBoundsException |
| * if index doesn't map to a string. |
| * */ |
| public synchronized String indexToString(int i) |
| throws java.lang.ArrayIndexOutOfBoundsException |
| { |
| return super.indexToString(i); |
| } |
| |
| /** @return integer index uniquely identifying the value of this string. */ |
| public synchronized int stringToIndex(String s) |
| { |
| return super.stringToIndex(s); |
| } |
| |
| /** Command-line unit test driver. This test relies on the fact that |
| * this version of the pool assigns indices consecutively, starting |
| * from zero, as new unique strings are encountered. |
| */ |
| public static void main(String[] args) |
| { |
| String[] word={ |
| "Zero","One","Two","Three","Four","Five", |
| "Six","Seven","Eight","Nine","Ten", |
| "Eleven","Twelve","Thirteen","Fourteen","Fifteen", |
| "Sixteen","Seventeen","Eighteen","Nineteen","Twenty", |
| "Twenty-One","Twenty-Two","Twenty-Three","Twenty-Four", |
| "Twenty-Five","Twenty-Six","Twenty-Seven","Twenty-Eight", |
| "Twenty-Nine","Thirty","Thirty-One","Thirty-Two", |
| "Thirty-Three","Thirty-Four","Thirty-Five","Thirty-Six", |
| "Thirty-Seven","Thirty-Eight","Thirty-Nine"}; |
| |
| DTMStringPool pool=new DTMSafeStringPool(); |
| |
| System.out.println("If no complaints are printed below, we passed initial test."); |
| |
| for(int pass=0;pass<=1;++pass) |
| { |
| int i; |
| |
| for(i=0;i<word.length;++i) |
| { |
| int j=pool.stringToIndex(word[i]); |
| if(j!=i) |
| System.out.println("\tMismatch populating pool: assigned "+ |
| j+" for create "+i); |
| } |
| |
| for(i=0;i<word.length;++i) |
| { |
| int j=pool.stringToIndex(word[i]); |
| if(j!=i) |
| System.out.println("\tMismatch in stringToIndex: returned "+ |
| j+" for lookup "+i); |
| } |
| |
| for(i=0;i<word.length;++i) |
| { |
| String w=pool.indexToString(i); |
| if(!word[i].equals(w)) |
| System.out.println("\tMismatch in indexToString: returned"+ |
| w+" for lookup "+i); |
| } |
| |
| pool.removeAllElements(); |
| |
| System.out.println("\nPass "+pass+" complete\n"); |
| } // end pass loop |
| } |
| } // DTMSafeStringPool |