| /* |
| * 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.search; |
| |
| import java.io.IOException; |
| import java.util.Arrays; |
| import java.util.Collection; |
| import java.util.HashSet; |
| import java.util.Objects; |
| import java.util.Set; |
| |
| import org.apache.lucene.document.NumericDocValuesField; |
| import org.apache.lucene.document.SortedNumericDocValuesField; |
| import org.apache.lucene.index.DocValues; |
| import org.apache.lucene.index.LeafReaderContext; |
| import org.apache.lucene.index.SortedNumericDocValues; |
| import org.apache.lucene.util.Accountable; |
| import org.apache.lucene.util.RamUsageEstimator; |
| |
| /** |
| * Like {@link DocValuesTermsQuery}, but this query only |
| * runs on a long {@link NumericDocValuesField} or a |
| * {@link SortedNumericDocValuesField}, matching |
| * all documents whose value in the specified field is |
| * contained in the provided set of long values. |
| * |
| * <p> |
| * <b>NOTE</b>: be very careful using this query: it is |
| * typically much slower than using {@code TermsQuery}, |
| * but in certain specialized cases may be faster. |
| * |
| * @lucene.experimental |
| */ |
| public class DocValuesNumbersQuery extends Query implements Accountable { |
| private static final long BASE_RAM_BYTES = RamUsageEstimator.shallowSizeOfInstance(DocValuesNumbersQuery.class); |
| |
| private final String field; |
| private final LongHashSet numbers; |
| |
| public DocValuesNumbersQuery(String field, long[] numbers) { |
| this.field = Objects.requireNonNull(field); |
| this.numbers = new LongHashSet(numbers); |
| } |
| |
| public DocValuesNumbersQuery(String field, Collection<Long> numbers) { |
| this.field = Objects.requireNonNull(field); |
| this.numbers = new LongHashSet(numbers.stream().mapToLong(Long::longValue).toArray()); |
| } |
| |
| public DocValuesNumbersQuery(String field, Long... numbers) { |
| this(field, new HashSet<Long>(Arrays.asList(numbers))); |
| } |
| |
| @Override |
| public boolean equals(Object other) { |
| return sameClassAs(other) && |
| equalsTo(getClass().cast(other)); |
| } |
| |
| private boolean equalsTo(DocValuesNumbersQuery other) { |
| return field.equals(other.field) && |
| numbers.equals(other.numbers); |
| } |
| |
| @Override |
| public int hashCode() { |
| return 31 * classHash() + Objects.hash(field, numbers); |
| } |
| |
| @Override |
| public void visit(QueryVisitor visitor) { |
| if (visitor.acceptField(field)) { |
| visitor.visitLeaf(this); |
| } |
| } |
| |
| public String getField() { |
| return field; |
| } |
| |
| public Set<Long> getNumbers() { |
| return numbers; |
| } |
| |
| @Override |
| public String toString(String defaultField) { |
| return new StringBuilder() |
| .append(field) |
| .append(": ") |
| .append(numbers.toString()) |
| .toString(); |
| } |
| |
| @Override |
| public long ramBytesUsed() { |
| return BASE_RAM_BYTES + |
| RamUsageEstimator.sizeOfObject(field) + |
| RamUsageEstimator.sizeOfObject(numbers); |
| } |
| |
| @Override |
| public Weight createWeight(IndexSearcher searcher, ScoreMode scoreMode, float boost) throws IOException { |
| return new ConstantScoreWeight(this, boost) { |
| |
| @Override |
| public Scorer scorer(LeafReaderContext context) throws IOException { |
| final SortedNumericDocValues values = DocValues.getSortedNumeric(context.reader(), field); |
| return new ConstantScoreScorer(this, score(), scoreMode, new TwoPhaseIterator(values) { |
| |
| @Override |
| public boolean matches() throws IOException { |
| int count = values.docValueCount(); |
| for(int i=0;i<count;i++) { |
| if (numbers.contains(values.nextValue())) { |
| return true; |
| } |
| } |
| return false; |
| } |
| |
| @Override |
| public float matchCost() { |
| return 5; // lookup in the set |
| } |
| }); |
| } |
| |
| @Override |
| public boolean isCacheable(LeafReaderContext ctx) { |
| return true; |
| } |
| |
| }; |
| } |
| |
| } |