Hi,
I am using lucene 1.4.3. The basic functionality of the search is
simple, put in the keyword as java and it will display you all the books
having java keyword.
Now I have to add a feature which also shows the name of top authors (lets
say top 5 authors) with the number of books, who has maximum number of books
in this result set.
Currently I m traversing through all the results, finding the value of
author field and putting them in a hash (to keep count of authors and number
of their books), but this takes too much time. Is there any efficient way of
doing this?
I have 150000 documents in my index. The field author can obviously
contain more than one value.
My current code block for finding top 5 authors for maximum books is
following.
tfd = searcher.search(query, null, nDocs, new Sort(sortCol));
StringTokenizer fieldToken = null;
HashMap fieldMap = new HashMap();
for(int i=0;i<tfd.totalHits;i++)
{
fieldToken = new
StringTokenizer(searcher.doc(tfd.scoreDocs[i].doc).get(author);
while(fieldToken.hasMoreTokens())
{
String token =
fieldToken.nextToken();
int count;
try
{
// increase the count by one
count =
Integer.parseInt(fieldMap.get(token).toString());
fieldMap.put(token, new Integer(++count));
}
catch(Exception e)
{
// put 1 in the new entry of author
fieldMap.put(token, new Integer(1));
}
}
}
// here I get the HashMap varialble (fieldMap), which I am
sorting later on to find the top 5 hits for this result set.
Thanks & Regards
Samar
Thanks & Regards,
Samar
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