| /* |
| * 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.valuesource; |
| |
| import java.io.IOException; |
| import java.util.Map; |
| import java.util.Objects; |
| |
| import org.apache.lucene.index.DocValues; |
| import org.apache.lucene.index.LeafReaderContext; |
| import org.apache.lucene.index.NumericDocValues; |
| import org.apache.lucene.index.SortedNumericDocValues; |
| import org.apache.lucene.search.SortField; |
| import org.apache.lucene.search.SortedNumericSelector; |
| import org.apache.lucene.search.SortedNumericSelector.Type; |
| import org.apache.lucene.search.SortedNumericSortField; |
| |
| /** |
| * Obtains float field values from {@link org.apache.lucene.index.LeafReader#getSortedNumericDocValues} and using a |
| * {@link org.apache.lucene.search.SortedNumericSelector} it gives a single-valued ValueSource view of a field. |
| */ |
| public class MultiValuedFloatFieldSource extends FloatFieldSource { |
| |
| protected final SortedNumericSelector.Type selector; |
| |
| public MultiValuedFloatFieldSource(String field, Type selector) { |
| super(field); |
| this.selector = selector; |
| Objects.requireNonNull(field, "Field is required to create a MultiValuedFloatFieldSource"); |
| Objects.requireNonNull(selector, "SortedNumericSelector is required to create a MultiValuedFloatFieldSource"); |
| } |
| |
| @Override |
| public SortField getSortField(boolean reverse) { |
| return new SortedNumericSortField(field, SortField.Type.FLOAT, reverse, selector); |
| } |
| |
| @Override |
| public String description() { |
| return "float(" + field + ',' + selector.name() + ')'; |
| } |
| |
| @Override |
| protected NumericDocValues getNumericDocValues(Map context, LeafReaderContext readerContext) throws IOException { |
| SortedNumericDocValues sortedDv = DocValues.getSortedNumeric(readerContext.reader(), field); |
| return SortedNumericSelector.wrap(sortedDv, selector, SortField.Type.FLOAT); |
| } |
| |
| @Override |
| public boolean equals(Object o) { |
| if (o.getClass() != MultiValuedFloatFieldSource.class) return false; |
| MultiValuedFloatFieldSource other = (MultiValuedFloatFieldSource)o; |
| if (this.selector != other.selector) return false; |
| return this.field.equals(other.field); |
| } |
| |
| @Override |
| public int hashCode() { |
| int h = super.hashCode(); |
| h += selector.hashCode(); |
| return h; |
| } |
| |
| } |