| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You under the Apache License, Version 2.0 |
| * (the "License"); you may not use this file except in compliance with |
| * the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package org.apache.lucene.queries.function; |
| |
| import java.io.IOException; |
| import java.util.Map; |
| import java.util.Objects; |
| import java.util.Set; |
| |
| import org.apache.lucene.index.LeafReaderContext; |
| import org.apache.lucene.index.Term; |
| import org.apache.lucene.search.Explanation; |
| import org.apache.lucene.search.IndexSearcher; |
| import org.apache.lucene.search.Query; |
| import org.apache.lucene.search.QueryVisitor; |
| import org.apache.lucene.search.ScoreMode; |
| import org.apache.lucene.search.Weight; |
| |
| /** |
| * A Query wrapping a {@link ValueSource} that matches docs in which the values in the value source match a configured |
| * range. The score is the float value. This can be a slow query if run by itself since it must visit all docs; |
| * ideally it's combined with other queries. |
| * It's mostly a wrapper around |
| * {@link FunctionValues#getRangeScorer(Weight, LeafReaderContext, String, String, boolean, boolean)}. |
| * |
| * A similar class is {@code org.apache.lucene.search.DocValuesRangeQuery} in the sandbox module. That one is |
| * constant scoring. |
| * |
| * @see FunctionQuery (constant scoring) |
| * @lucene.experimental |
| */ |
| public class FunctionRangeQuery extends Query { |
| |
| private final ValueSource valueSource; |
| |
| // These two are declared as strings because FunctionValues.getRangeScorer takes String args and parses them. |
| private final String lowerVal; |
| private final String upperVal; |
| private final boolean includeLower; |
| private final boolean includeUpper; |
| |
| public FunctionRangeQuery(ValueSource valueSource, Number lowerVal, Number upperVal, |
| boolean includeLower, boolean includeUpper) { |
| this(valueSource, lowerVal == null ? null : lowerVal.toString(), upperVal == null ? null : upperVal.toString(), |
| includeLower, includeUpper); |
| } |
| |
| public FunctionRangeQuery(ValueSource valueSource, String lowerVal, String upperVal, |
| boolean includeLower, boolean includeUpper) { |
| this.valueSource = valueSource; |
| this.lowerVal = lowerVal; |
| this.upperVal = upperVal; |
| this.includeLower = includeLower; |
| this.includeUpper = includeUpper; |
| } |
| |
| public ValueSource getValueSource() { |
| return valueSource; |
| } |
| |
| public String getLowerVal() { |
| return lowerVal; |
| } |
| |
| public String getUpperVal() { |
| return upperVal; |
| } |
| |
| public boolean isIncludeLower() { |
| return includeLower; |
| } |
| |
| public boolean isIncludeUpper() { |
| return includeUpper; |
| } |
| |
| @Override |
| public String toString(String field) { |
| return "frange(" + valueSource + "):" |
| + (includeLower ? '[' : '{') |
| + (lowerVal == null ? "*" : lowerVal) + " TO " + (upperVal == null ? "*" : upperVal) |
| + (includeUpper ? ']' : '}'); |
| } |
| |
| @Override |
| public boolean equals(Object other) { |
| return sameClassAs(other) && |
| equalsTo(getClass().cast(other)); |
| } |
| |
| private boolean equalsTo(FunctionRangeQuery other) { |
| return Objects.equals(includeLower, other.includeLower) && |
| Objects.equals(includeUpper, other.includeUpper) && |
| Objects.equals(valueSource, other.valueSource) && |
| Objects.equals(lowerVal, other.lowerVal) && |
| Objects.equals(upperVal, other.upperVal); |
| } |
| |
| @Override |
| public int hashCode() { |
| return classHash() ^ Objects.hash(valueSource, lowerVal, upperVal, includeLower, includeUpper); |
| } |
| |
| @Override |
| public void visit(QueryVisitor visitor) { |
| visitor.visitLeaf(this); |
| } |
| |
| @Override |
| public Weight createWeight(IndexSearcher searcher, ScoreMode scoreMode, float boost) throws IOException { |
| return new FunctionRangeWeight(searcher); |
| } |
| |
| private class FunctionRangeWeight extends Weight { |
| @SuppressWarnings("rawtypes") |
| private final Map vsContext; |
| |
| public FunctionRangeWeight(IndexSearcher searcher) throws IOException { |
| super(FunctionRangeQuery.this); |
| vsContext = ValueSource.newContext(searcher); |
| valueSource.createWeight(vsContext, searcher);//callback on valueSource tree |
| } |
| |
| @Override |
| public void extractTerms(Set<Term> terms) { |
| //none |
| } |
| |
| @Override |
| public Explanation explain(LeafReaderContext context, int doc) throws IOException { |
| FunctionValues functionValues = valueSource.getValues(vsContext, context); |
| //note: by using ValueSourceScorer directly, we avoid calling scorer.advance(doc) and checking if true, |
| // which can be slow since if that doc doesn't match, it has to linearly find the next matching |
| ValueSourceScorer scorer = scorer(context); |
| if (scorer.matches(doc)) { |
| scorer.iterator().advance(doc); |
| return Explanation.match(scorer.score(), FunctionRangeQuery.this.toString(), functionValues.explain(doc)); |
| } else { |
| return Explanation.noMatch(FunctionRangeQuery.this.toString(), functionValues.explain(doc)); |
| } |
| } |
| |
| @Override |
| public ValueSourceScorer scorer(LeafReaderContext context) throws IOException { |
| FunctionValues functionValues = valueSource.getValues(vsContext, context); |
| // getRangeScorer takes String args and parses them. Weird. |
| return functionValues.getRangeScorer(this, context, lowerVal, upperVal, includeLower, includeUpper); |
| } |
| |
| @Override |
| public boolean isCacheable(LeafReaderContext ctx) { |
| return false; |
| } |
| } |
| } |