Your requirement was clear but I guess my suggested
solution wasn't.
Here it is in detail:
public class CountTest
{
public static void main(String[] args) throws
Exception
{
RAMDirectory tempDir = new RAMDirectory();
Analyzer analyzer=new WhitespaceAnalyzer();
IndexWriter writer = new IndexWriter(tempDir,
analyzer, true);
addDoc(writer,"1 1 1", "a");
addDoc(writer,"2 1 2", "b 2");
addDoc(writer,"3 3 3", "b 3");
writer.close();
class DocCount
{
int count=0;
private String term;
public DocCount(String term)
{
this.term=term;
}
public String toString()
{
return term+": "+count;
}
}
HashMap aDocTermCounts=new HashMap();
IndexReader reader = IndexReader.open(tempDir);
for(int i=0;i<reader.maxDoc();i++)
{
TermFreqVector
tfv=reader.getTermFreqVector(i,"fieldA");
String[] terms=tfv.getTerms();
//here we use just the list of terms and ignore
the frequencies..
// int freqs[]=tfv.getTermFrequencies();
for (int j = 0; j < terms.length; j++)
{
DocCount docCount=(DocCount)
aDocTermCounts.get(terms[j]);
if(docCount==null)
{
docCount=new DocCount(terms[j]);
aDocTermCounts.put(terms[j],docCount);
}
docCount.count++;
}
}
for (Iterator iter =
aDocTermCounts.values().iterator(); iter.hasNext();)
{
DocCount docCount = (DocCount)
iter.next();
System.out.println(docCount);
}
reader.close();
}
static void addDoc(IndexWriter writer, String
fieldA, String fieldB) throws IOException
{
Document doc=new Document();
doc.add( new Field("fieldA", fieldA,
Field.Store.YES, Field.Index.TOKENIZED,
Field.TermVector.YES));
writer.addDocument(doc);
}
}
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