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/*
* $Id: DTMSafeStringPool.java,v 1.8 2010-11-01 04:34:38 joehw Exp $
*/
package com.sun.org.apache.xml.internal.dtm.ref;
/** 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.
*
* Status: Passed basic test in main().
* */
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