public Sequence evalQuery(NodeSet nodes, List terms) throws XPathException {
if (terms == null || terms.size() == 0) return Sequence.EMPTY_SEQUENCE; // no search terms
double threshold = 0.65;
if (getArgumentCount() == 3) {
Sequence thresOpt = getArgument(2).eval(nodes);
// TODO : get rid of getLength()
if (!thresOpt.hasOne())
throw new XPathException(
getASTNode(), "third argument to " + getName() + "should be a single double value");
threshold = ((DoubleValue) thresOpt.convertTo(Type.DOUBLE)).getDouble();
}
NodeSet hits[] = new NodeSet[terms.size()];
String term;
TermMatcher matcher;
for (int k = 0; k < terms.size(); k++) {
term = (String) terms.get(k);
if (term.length() == 0) hits[k] = null;
else {
matcher = new FuzzyMatcher(term, threshold);
hits[k] =
context
.getBroker()
.getTextEngine()
.getNodes(
context,
nodes.getDocumentSet(),
nodes,
NodeSet.ANCESTOR,
null,
matcher,
term.substring(0, 1));
}
}
return mergeResults(hits);
}
public Sequence eval(Sequence contextSequence, Item contextItem) throws XPathException {
Sequence querySeq = getArgument(1).eval(contextSequence);
if (querySeq.isEmpty()) {
return Sequence.EMPTY_SEQUENCE;
}
String query = querySeq.itemAt(0).getStringValue();
String[] terms = getSearchTerms(query);
NodeSet hits[] = new NodeSet[terms.length];
NodeSet contextSet = contextSequence.toNodeSet();
for (int k = 0; k < terms.length; k++) {
hits[k] =
context
.getBroker()
.getTextEngine()
.getNodesContaining(
context,
contextSet.getDocumentSet(),
null,
NodeSet.DESCENDANT,
null,
terms[k],
DBBroker.MATCH_EXACT);
hits[k] = getArgument(0).eval(hits[k]).toNodeSet();
}
NodeSet result = hits[0];
for (int k = 1; k < hits.length; k++) {
if (hits[k] != null) result = result.deepIntersection(hits[k]);
}
if (LOG.isDebugEnabled()) LOG.debug("FOUND: " + result.getLength());
return result;
}