| /* |
| * 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.geometry.euclidean.oned; |
| |
| import java.io.Serializable; |
| |
| import org.apache.commons.math3.exception.MathUnsupportedOperationException; |
| import org.apache.commons.math3.exception.util.LocalizedFormats; |
| import org.apache.commons.math3.geometry.Space; |
| |
| /** |
| * This class implements a one-dimensional space. |
| * @since 3.0 |
| */ |
| public class Euclidean1D implements Serializable, Space { |
| |
| /** Serializable version identifier. */ |
| private static final long serialVersionUID = -1178039568877797126L; |
| |
| /** Private constructor for the singleton. |
| */ |
| private Euclidean1D() { |
| } |
| |
| /** Get the unique instance. |
| * @return the unique instance |
| */ |
| public static Euclidean1D getInstance() { |
| return LazyHolder.INSTANCE; |
| } |
| |
| /** {@inheritDoc} */ |
| public int getDimension() { |
| return 1; |
| } |
| |
| /** {@inheritDoc} |
| * <p> |
| * As the 1-dimension Euclidean space does not have proper sub-spaces, |
| * this method always throws a {@link NoSubSpaceException} |
| * </p> |
| * @return nothing |
| * @throws NoSubSpaceException in all cases |
| */ |
| public Space getSubSpace() throws NoSubSpaceException { |
| throw new NoSubSpaceException(); |
| } |
| |
| // CHECKSTYLE: stop HideUtilityClassConstructor |
| /** Holder for the instance. |
| * <p>We use here the Initialization On Demand Holder Idiom.</p> |
| */ |
| private static class LazyHolder { |
| /** Cached field instance. */ |
| private static final Euclidean1D INSTANCE = new Euclidean1D(); |
| } |
| // CHECKSTYLE: resume HideUtilityClassConstructor |
| |
| /** Handle deserialization of the singleton. |
| * @return the singleton instance |
| */ |
| private Object readResolve() { |
| // return the singleton instance |
| return LazyHolder.INSTANCE; |
| } |
| |
| /** Specialized exception for inexistent sub-space. |
| * <p> |
| * This exception is thrown when attempting to get the sub-space of a one-dimensional space |
| * </p> |
| */ |
| public static class NoSubSpaceException extends MathUnsupportedOperationException { |
| |
| /** Serializable UID. */ |
| private static final long serialVersionUID = 20140225L; |
| |
| /** Simple constructor. |
| */ |
| public NoSubSpaceException() { |
| super(LocalizedFormats.NOT_SUPPORTED_IN_DIMENSION_N, 1); |
| } |
| |
| } |
| |
| } |