| /* |
| * reserved comment block |
| * DO NOT REMOVE OR ALTER! |
| */ |
| /* |
| * Copyright 1999-2004 The Apache Software Foundation. |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| /* |
| * $Id: DTMSafeStringPool.java,v 1.2.4.1 2005/09/15 08:15:04 suresh_emailid Exp $ |
| */ |
| |
| package com.sun.org.apache.xml.internal.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 |