Examples with TermStyle org.apache.solr.common.params.MoreLikeThisParams.TermStyle used on opensource projects

Example 1 with TermStyle

use of org.apache.solr.common.params.MoreLikeThisParams.TermStyle in project lucene-solr by apache.

the class MoreLikeThisHandler method handleRequestBody.

@Override
public void handleRequestBody(SolrQueryRequest req, SolrQueryResponse rsp) throws Exception {
    SolrParams params = req.getParams();
    long timeAllowed = (long) params.getInt(CommonParams.TIME_ALLOWED, -1);
    if (timeAllowed > 0) {
        SolrQueryTimeoutImpl.set(timeAllowed);
    }
    try {
        // Set field flags
        ReturnFields returnFields = new SolrReturnFields(req);
        rsp.setReturnFields(returnFields);
        int flags = 0;
        if (returnFields.wantsScore()) {
            flags |= SolrIndexSearcher.GET_SCORES;
        }
        String defType = params.get(QueryParsing.DEFTYPE, QParserPlugin.DEFAULT_QTYPE);
        String q = params.get(CommonParams.Q);
        Query query = null;
        SortSpec sortSpec = null;
        List<Query> filters = null;
        try {
            if (q != null) {
                QParser parser = QParser.getParser(q, defType, req);
                query = parser.getQuery();
                sortSpec = parser.getSortSpec(true);
            }
            String[] fqs = req.getParams().getParams(CommonParams.FQ);
            if (fqs != null && fqs.length != 0) {
                filters = new ArrayList<>();
                for (String fq : fqs) {
                    if (fq != null && fq.trim().length() != 0) {
                        QParser fqp = QParser.getParser(fq, req);
                        filters.add(fqp.getQuery());
                    }
                }
            }
        } catch (SyntaxError e) {
            throw new SolrException(SolrException.ErrorCode.BAD_REQUEST, e);
        }
        SolrIndexSearcher searcher = req.getSearcher();
        MoreLikeThisHelper mlt = new MoreLikeThisHelper(params, searcher);
        // Hold on to the interesting terms if relevant
        TermStyle termStyle = TermStyle.get(params.get(MoreLikeThisParams.INTERESTING_TERMS));
        List<InterestingTerm> interesting = (termStyle == TermStyle.NONE) ? null : new ArrayList<>(mlt.mlt.getMaxQueryTerms());
        DocListAndSet mltDocs = null;
        // Parse Required Params
        // This will either have a single Reader or valid query
        Reader reader = null;
        try {
            if (q == null || q.trim().length() < 1) {
                Iterable<ContentStream> streams = req.getContentStreams();
                if (streams != null) {
                    Iterator<ContentStream> iter = streams.iterator();
                    if (iter.hasNext()) {
                        reader = iter.next().getReader();
                    }
                    if (iter.hasNext()) {
                        throw new SolrException(SolrException.ErrorCode.BAD_REQUEST, "MoreLikeThis does not support multiple ContentStreams");
                    }
                }
            }
            int start = params.getInt(CommonParams.START, CommonParams.START_DEFAULT);
            int rows = params.getInt(CommonParams.ROWS, CommonParams.ROWS_DEFAULT);
            // --------------------------------------------------------------------------------
            if (reader != null) {
                mltDocs = mlt.getMoreLikeThis(reader, start, rows, filters, interesting, flags);
            } else if (q != null) {
                // Matching options
                boolean includeMatch = params.getBool(MoreLikeThisParams.MATCH_INCLUDE, true);
                int matchOffset = params.getInt(MoreLikeThisParams.MATCH_OFFSET, 0);
                // Find the base match
                DocList match = searcher.getDocList(query, null, null, matchOffset, 1, // only get the first one...
                flags);
                if (includeMatch) {
                    rsp.add("match", match);
                }
                // This is an iterator, but we only handle the first match
                DocIterator iterator = match.iterator();
                if (iterator.hasNext()) {
                    // do a MoreLikeThis query for each document in results
                    int id = iterator.nextDoc();
                    mltDocs = mlt.getMoreLikeThis(id, start, rows, filters, interesting, flags);
                }
            } else {
                throw new SolrException(SolrException.ErrorCode.BAD_REQUEST, "MoreLikeThis requires either a query (?q=) or text to find similar documents.");
            }
        } finally {
            if (reader != null) {
                reader.close();
            }
        }
        if (mltDocs == null) {
            // avoid NPE
            mltDocs = new DocListAndSet();
        }
        rsp.addResponse(mltDocs.docList);
        if (interesting != null) {
            if (termStyle == TermStyle.DETAILS) {
                NamedList<Float> it = new NamedList<>();
                for (InterestingTerm t : interesting) {
                    it.add(t.term.toString(), t.boost);
                }
                rsp.add("interestingTerms", it);
            } else {
                List<String> it = new ArrayList<>(interesting.size());
                for (InterestingTerm t : interesting) {
                    it.add(t.term.text());
                }
                rsp.add("interestingTerms", it);
            }
        }
        // maybe facet the results
        if (params.getBool(FacetParams.FACET, false)) {
            if (mltDocs.docSet == null) {
                rsp.add("facet_counts", null);
            } else {
                SimpleFacets f = new SimpleFacets(req, mltDocs.docSet, params);
                rsp.add("facet_counts", FacetComponent.getFacetCounts(f));
            }
        }
        boolean dbg = req.getParams().getBool(CommonParams.DEBUG_QUERY, false);
        boolean dbgQuery = false, dbgResults = false;
        if (dbg == false) {
            //if it's true, we are doing everything anyway.
            String[] dbgParams = req.getParams().getParams(CommonParams.DEBUG);
            if (dbgParams != null) {
                for (String dbgParam : dbgParams) {
                    if (dbgParam.equals(CommonParams.QUERY)) {
                        dbgQuery = true;
                    } else if (dbgParam.equals(CommonParams.RESULTS)) {
                        dbgResults = true;
                    }
                }
            }
        } else {
            dbgQuery = true;
            dbgResults = true;
        }
        // Copied from StandardRequestHandler... perhaps it should be added to doStandardDebug?
        if (dbg == true) {
            try {
                NamedList<Object> dbgInfo = SolrPluginUtils.doStandardDebug(req, q, mlt.getRawMLTQuery(), mltDocs.docList, dbgQuery, dbgResults);
                if (null != dbgInfo) {
                    if (null != filters) {
                        dbgInfo.add("filter_queries", req.getParams().getParams(CommonParams.FQ));
                        List<String> fqs = new ArrayList<>(filters.size());
                        for (Query fq : filters) {
                            fqs.add(QueryParsing.toString(fq, req.getSchema()));
                        }
                        dbgInfo.add("parsed_filter_queries", fqs);
                    }
                    rsp.add("debug", dbgInfo);
                }
            } catch (Exception e) {
                SolrException.log(log, "Exception during debug", e);
                rsp.add("exception_during_debug", SolrException.toStr(e));
            }
        }
    } catch (ExitableDirectoryReader.ExitingReaderException ex) {
        log.warn("Query: " + req.getParamString() + "; " + ex.getMessage());
    } finally {
        SolrQueryTimeoutImpl.reset();
    }
}