Examples with PayloadFunction org.apache.lucene.queries.payloads.PayloadFunction used on opensource projects

Example 1 with PayloadFunction

use of org.apache.lucene.queries.payloads.PayloadFunction in project lucene-solr by apache.

the class PayloadScoreQParserPlugin method createParser.

@Override
public QParser createParser(String qstr, SolrParams localParams, SolrParams params, SolrQueryRequest req) {
    return new QParser(qstr, localParams, params, req) {

        @Override
        public Query parse() throws SyntaxError {
            String field = localParams.get(QueryParsing.F);
            String value = localParams.get(QueryParsing.V);
            String func = localParams.get("func");
            boolean includeSpanScore = localParams.getBool("includeSpanScore", false);
            if (field == null) {
                throw new SolrException(SolrException.ErrorCode.BAD_REQUEST, "'f' not specified");
            }
            if (value == null) {
                throw new SolrException(SolrException.ErrorCode.BAD_REQUEST, "query string missing");
            }
            FieldType ft = req.getCore().getLatestSchema().getFieldType(field);
            Analyzer analyzer = ft.getQueryAnalyzer();
            SpanQuery query = null;
            try {
                query = PayloadUtils.createSpanQuery(field, value, analyzer);
            } catch (IOException e) {
                throw new SolrException(SolrException.ErrorCode.BAD_REQUEST, e);
            }
            if (query == null) {
                throw new SolrException(SolrException.ErrorCode.BAD_REQUEST, "SpanQuery is null");
            }
            // note: this query(/parser) does not support func=first; 'first' is a payload() value source feature only
            PayloadFunction payloadFunction = PayloadUtils.getPayloadFunction(func);
            if (payloadFunction == null)
                throw new SyntaxError("Unknown payload function: " + func);
            return new PayloadScoreQuery(query, payloadFunction, includeSpanScore);
        }
    };
}