/* * 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.commons.math3.fraction; import org.apache.commons.math3.Field; import org.apache.commons.math3.FieldElement; import java.io.Serializable; /** * Representation of the fractional numbers without any overflow field. * *
This class is a singleton.
*
* @see Fraction
* @since 2.0
*/
public class BigFractionField implements Field We use here the Initialization On Demand Holder Idiom.
*/
private static class LazyHolder {
/** Cached field instance. */
private static final BigFractionField INSTANCE = new BigFractionField();
}
// CHECKSTYLE: resume HideUtilityClassConstructor
/**
* Handle deserialization of the singleton.
*
* @return the singleton instance
*/
private Object readResolve() {
// return the singleton instance
return LazyHolder.INSTANCE;
}
}