/*
* The Apache Software License, Version 1.1
*
*
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* "This product includes software developed by the
* Apache Software Foundation (http://www.apache.org/)."
* Alternately, this acknowledgment may appear in the software itself,
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* ====================================================================
*
* 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;
import org.apache.xml.utils.IntVector;
import java.util.Vector;
/** <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