CustomStringPool is an example of an application-provided data structure for a DTM implementation to hold symbol references, e.g. element names. It will follow the DTMStringPool interface and use two simple methods indexToString(int i) and stringToIndex(String s) to map between a set of string values and a set of integer index values. Therefore, an application may improve DTM processing speed by substituting the DTM symbol resolution tables with application specific quick symbol resolution tables.

%REVIEW% The only difference between this an DTMStringPool seems to be that it uses a java.lang.Hashtable full of Integers rather than implementing its own hashing. Joe deliberately avoided that approach when writing DTMStringPool, since it is both much more memory-hungry and probably slower -- especially in JDK 1.1.x, where Hashtable is synchronized. We need to either justify this implementation or discard it.

Status: In progress, under discussion.