org.apache.xml.dtm.ref
Class DTMSafeStringPool

java.lang.Object
  org.apache.xml.dtm.ref.DTMStringPool
      org.apache.xml.dtm.ref.DTMSafeStringPool

public class DTMSafeStringPool

extends DTMStringPool

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().

Field Summary

Fields inherited from class org.apache.xml.dtm.ref.DTMStringPool

HASHPRIME, m_hashChain, m_hashStart, m_intToString, NULL

Constructor Summary

DTMSafeStringPool()

Method Summary

String	indexToString(int i)
static void	main(String[] args) Command-line unit test driver.
void	removeAllElements()
int	stringToIndex(String s)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

DTMSafeStringPool

public DTMSafeStringPool()

Method Detail

removeAllElements

public void removeAllElements()

Overrides:

removeAllElements in class DTMStringPool

indexToString

public String indexToString(int i)
                     throws ArrayIndexOutOfBoundsException

Overrides:

indexToString in class DTMStringPool

Returns:

string whose value is uniquely identified by this integer index.

Throws:

ArrayIndexOutOfBoundsException - if index doesn't map to a string.

stringToIndex

public int stringToIndex(String s)

Overrides:

stringToIndex in class DTMStringPool

Returns:

integer index uniquely identifying the value of this string.

main

public static void main(String[] args)

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.