org.apache.xml.dtm.ref
Class CustomStringPool
java.lang.Object
|
+--org.apache.xml.dtm.ref.DTMStringPool
|
+--org.apache.xml.dtm.ref.CustomStringPool
- public class CustomStringPool
- extends DTMStringPool
CustomStringPool is an example of appliction provided data structure
for a DTM implementation to hold symbol references, e.g. elelment names.
It will follow the DTMDStringPool interface and use two simple methods
indexToString(int i) and stringToIndex(Sring 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.
Field Summary |
static int |
NULL
|
Methods inherited from class java.lang.Object |
equals,
getClass,
hashCode,
notify,
notifyAll,
toString,
wait,
wait,
wait |
NULL
public static final int NULL
CustomStringPool
public CustomStringPool()
removeAllElements
public void removeAllElements()
- Overrides:
- removeAllElements in class DTMStringPool
indexToString
public java.lang.String indexToString(int i)
throws java.lang.ArrayIndexOutOfBoundsException
- Returns:
- string whose value is uniquely identified by this integer index.
- Throws:
- java.lang.ArrayIndexOutOfBoundsException - if index doesn't map to a string.
- Overrides:
- indexToString in class DTMStringPool
stringToIndex
public int stringToIndex(java.lang.String s)
- Returns:
- integer index uniquely identifying the value of this string.
- Overrides:
- stringToIndex in class DTMStringPool
Copyright © 2005 Apache XML Project. All Rights Reserved.