String fieldsList=e.getAttribute("fieldNames"); //a comma-delimited list of fields
String fields[]=defaultFieldNames;
if((fieldsList!=null)&&(fieldsList.trim().length()>0))
{
fields=fieldsList.trim().split(",");
//trim the fieldnames
for (int i = 0; i < fields.length; i++) {
fields[i]=fields[i].trim();
}
}
//Parse any "stopWords" attribute
//TODO MoreLikeThis needs to ideally have per-field stopWords lists - until then
//I use all analyzers/fields to generate multi-field compatible stop list
String stopWords=e.getAttribute("stopWords");
Set stopWordsSet=null;
if((stopWords!=null)&&(fields!=null))
{
stopWordsSet=new HashSet();
for (int i = 0; i < fields.length; i++)
{
TokenStream ts = analyzer.tokenStream(fields[i],new StringReader(stopWords));
try
{
Token stopToken=ts.next();
while(stopToken!=null)
{
stopWordsSet.add(stopToken.termText());
stopToken=ts.next();
}
}
catch(IOException ioe)
{
throw new ParserException("IoException parsing stop words list in "
+getClass().getName()+":"+ioe.getLocalizedMessage());
}
}
}
MoreLikeThisQuery mlt=new MoreLikeThisQuery(DOMUtils.getText(e),fields,analyzer);
mlt.setMaxQueryTerms(DOMUtils.getAttribute(e,"maxQueryTerms",defaultMaxQueryTerms));
mlt.setMinTermFrequency(DOMUtils.getAttribute(e,"minTermFrequency",defaultMinTermFrequency));
mlt.setPercentTermsToMatch(DOMUtils.getAttribute(e,"percentTermsToMatch",defaultPercentTermsToMatch)/100);
mlt.setStopWords(stopWordsSet);
mlt.setBoost(DOMUtils.getAttribute(e,"boost",1.0f));
return mlt;
