org.apache.lucene.document.DoubleDocValuesField Maven / Gradle / Ivy
/*
* 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.document;
/**
* Syntactic sugar for encoding doubles as NumericDocValues
* via {@link Double#doubleToRawLongBits(double)}.
*
* Per-document double values can be retrieved via
* {@link org.apache.lucene.index.LeafReader#getNumericDocValues(String)}.
*
* NOTE: In most all cases this will be rather inefficient,
* requiring eight bytes per document. Consider encoding double
* values yourself with only as much precision as you require.
*/
public class DoubleDocValuesField extends NumericDocValuesField {
/**
* Creates a new DocValues field with the specified 64-bit double value
* @param name field name
* @param value 64-bit double value
* @throws IllegalArgumentException if the field name is null
*/
public DoubleDocValuesField(String name, double value) {
super(name, Double.doubleToRawLongBits(value));
}
@Override
public void setDoubleValue(double value) {
super.setLongValue(Double.doubleToRawLongBits(value));
}
@Override
public void setLongValue(long value) {
throw new IllegalArgumentException("cannot change value type from Double to Long");
}
}