Examples with FilterScorer org.apache.lucene.search.FilterScorer used on opensource projects

Example 1 with FilterScorer

use of org.apache.lucene.search.FilterScorer in project lucene-solr by apache.

the class TestJoinUtil method numericDocValuesScoreQuery.

// FunctionQuery would be helpful, but join module doesn't depend on queries module.
static Query numericDocValuesScoreQuery(final String field) {
    return new Query() {

        private final Query fieldQuery = new FieldValueQuery(field);

        @Override
        public Weight createWeight(IndexSearcher searcher, boolean needsScores, float boost) throws IOException {
            Weight fieldWeight = fieldQuery.createWeight(searcher, false, boost);
            return new Weight(this) {

                @Override
                public void extractTerms(Set<Term> terms) {
                }

                @Override
                public Explanation explain(LeafReaderContext context, int doc) throws IOException {
                    return null;
                }

                @Override
                public Scorer scorer(LeafReaderContext context) throws IOException {
                    Scorer fieldScorer = fieldWeight.scorer(context);
                    if (fieldScorer == null) {
                        return null;
                    }
                    NumericDocValues price = context.reader().getNumericDocValues(field);
                    return new FilterScorer(fieldScorer, this) {

                        @Override
                        public float score() throws IOException {
                            assertEquals(in.docID(), price.advance(in.docID()));
                            return (float) price.longValue();
                        }
                    };
                }
            };
        }

        @Override
        public String toString(String field) {
            return fieldQuery.toString(field);
        }

        @Override
        public boolean equals(Object o) {
            return o == this;
        }

        @Override
        public int hashCode() {
            return System.identityHashCode(this);
        }
    };
}