| /* |
| * 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 org.apache.lucene.index.AtomicReader; |
| import org.apache.lucene.index.AtomicReaderContext; |
| import org.apache.lucene.index.DocValues; |
| import org.apache.lucene.index.NumericDocValues; |
| import org.apache.lucene.queries.function.FunctionValues; |
| import org.apache.lucene.queries.function.docvalues.DoubleDocValues; |
| import org.apache.lucene.util.Bits; |
| import org.apache.lucene.util.mutable.MutableValue; |
| import org.apache.lucene.util.mutable.MutableValueDouble; |
| |
| /** |
| * Obtains double field values from {@link AtomicReader#getNumericDocValues} and makes |
| * those values available as other numeric types, casting as needed. |
| */ |
| public class DoubleFieldSource extends FieldCacheSource { |
| |
| public DoubleFieldSource(String field) { |
| super(field); |
| } |
| |
| @Override |
| public String description() { |
| return "double(" + field + ')'; |
| } |
| |
| @Override |
| public FunctionValues getValues(Map context, AtomicReaderContext readerContext) throws IOException { |
| final NumericDocValues arr = DocValues.getNumeric(readerContext.reader(), field); |
| final Bits valid = DocValues.getDocsWithField(readerContext.reader(), field); |
| return new DoubleDocValues(this) { |
| @Override |
| public double doubleVal(int doc) { |
| return Double.longBitsToDouble(arr.get(doc)); |
| } |
| |
| @Override |
| public boolean exists(int doc) { |
| return arr.get(doc) != 0 || valid.get(doc); |
| } |
| |
| @Override |
| public ValueFiller getValueFiller() { |
| return new ValueFiller() { |
| private final MutableValueDouble mval = new MutableValueDouble(); |
| |
| @Override |
| public MutableValue getValue() { |
| return mval; |
| } |
| |
| @Override |
| public void fillValue(int doc) { |
| mval.value = doubleVal(doc); |
| mval.exists = mval.value != 0 || valid.get(doc); |
| } |
| }; |
| } |
| }; |
| } |
| |
| @Override |
| public boolean equals(Object o) { |
| if (o.getClass() != DoubleFieldSource.class) return false; |
| DoubleFieldSource other = (DoubleFieldSource) o; |
| return super.equals(other); |
| } |
| |
| @Override |
| public int hashCode() { |
| int h = Double.class.hashCode(); |
| h += super.hashCode(); |
| return h; |
| } |
| } |