| /* ==================================================================== |
| * The Apache Software License, Version 1.1 |
| * |
| * Copyright (c) 2002-2003 The Apache Software Foundation. All rights |
| * reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in |
| * the documentation and/or other materials provided with the |
| * distribution. |
| * |
| * 3. The end-user documentation included with the redistribution, if |
| * any, must include the following acknowlegement: |
| * "This product includes software developed by the |
| * Apache Software Foundation (http://www.apache.org/)." |
| * Alternately, this acknowlegement may appear in the software itself, |
| * if and wherever such third-party acknowlegements normally appear. |
| * |
| * 4. The names "The Jakarta Project", "Commons", and "Apache Software |
| * Foundation" must not be used to endorse or promote products derived |
| * from this software without prior written permission. For written |
| * permission, please contact apache@apache.org. |
| * |
| * 5. Products derived from this software may not be called "Apache" |
| * nor may "Apache" appear in their names without prior written |
| * permission of the Apache Software Foundation. |
| * |
| * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED |
| * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
| * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR |
| * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF |
| * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND |
| * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, |
| * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT |
| * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| * SUCH DAMAGE. |
| * ==================================================================== |
| * |
| * This software consists of voluntary contributions made by many |
| * individuals on behalf of the Apache Software Foundation. For more |
| * information on the Apache Software Foundation, please see |
| * <http://www.apache.org/>. |
| */ |
| package org.apache.commons.lang.math; |
| |
| import java.io.Serializable; |
| |
| /** |
| * <p><code>DoubleRange</code> represents an inclusive range of <code>double</code>s.</p> |
| * |
| * @author Stephen Colebourne |
| * @since 2.0 |
| * @version $Id: DoubleRange.java,v 1.3 2003/07/14 22:25:04 bayard Exp $ |
| */ |
| public final class DoubleRange extends Range implements Serializable { |
| |
| private static final long serialVersionUID = 71849363892740L; |
| |
| /** |
| * The minimum number in this range (inclusive). |
| */ |
| private final double min; |
| /** |
| * The maximum number in this range (inclusive). |
| */ |
| private final double max; |
| |
| /** |
| * Cached output minObject (class is immutable). |
| */ |
| private transient Double minObject = null; |
| /** |
| * Cached output maxObject (class is immutable). |
| */ |
| private transient Double maxObject = null; |
| /** |
| * Cached output hashCode (class is immutable). |
| */ |
| private transient int hashCode = 0; |
| /** |
| * Cached output toString (class is immutable). |
| */ |
| private transient String toString = null; |
| |
| /** |
| * <p>Constructs a new <code>DoubleRange</code> using the specified |
| * number as both the minimum and maximum in this range.</p> |
| * |
| * @param number the number to use for this range |
| * @throws IllegalArgumentException if the number is <code>NaN</code> |
| */ |
| public DoubleRange(double number) { |
| super(); |
| if (Double.isNaN(number)) { |
| throw new IllegalArgumentException("The number must not be NaN"); |
| } |
| this.min = number; |
| this.max = number; |
| } |
| |
| /** |
| * <p>Constructs a new <code>DoubleRange</code> using the specified |
| * number as both the minimum and maximum in this range.</p> |
| * |
| * @param number the number to use for this range, must not |
| * be <code>null</code> |
| * @throws IllegalArgumentException if the number is <code>null</code> |
| * @throws IllegalArgumentException if the number is <code>NaN</code> |
| */ |
| public DoubleRange(Number number) { |
| super(); |
| if (number == null) { |
| throw new IllegalArgumentException("The number must not be null"); |
| } |
| this.min = number.doubleValue(); |
| this.max = number.doubleValue(); |
| if (Double.isNaN(min) || Double.isNaN(max)) { |
| throw new IllegalArgumentException("The number must not be NaN"); |
| } |
| if (number instanceof Double) { |
| this.minObject = (Double) number; |
| this.maxObject = (Double) number; |
| } |
| } |
| |
| /** |
| * <p>Constructs a new <code>DoubleRange</code> with the specified |
| * minimum and maximum numbers (both inclusive).</p> |
| * |
| * <p>The arguments may be passed in the order (min,max) or (max,min). The |
| * getMinimum and getMaximum methods will return the correct values.</p> |
| * |
| * @param number1 first number that defines the edge of the range, inclusive |
| * @param number2 second number that defines the edge of the range, inclusive |
| * @throws IllegalArgumentException if either number is <code>NaN</code> |
| */ |
| public DoubleRange(double number1, double number2) { |
| super(); |
| if (Double.isNaN(number1) || Double.isNaN(number2)) { |
| throw new IllegalArgumentException("The numbers must not be NaN"); |
| } |
| if (number2 < number1) { |
| this.min = number2; |
| this.max = number1; |
| } else { |
| this.min = number1; |
| this.max = number2; |
| } |
| } |
| |
| /** |
| * <p>Constructs a new <code>DoubleRange</code> with the specified |
| * minimum and maximum numbers (both inclusive).</p> |
| * |
| * <p>The arguments may be passed in the order (min,max) or (max,min). The |
| * getMinimum and getMaximum methods will return the correct values.</p> |
| * |
| * @param number1 first number that defines the edge of the range, inclusive |
| * @param number2 second number that defines the edge of the range, inclusive |
| * @throws IllegalArgumentException if either number is <code>null</code> |
| * @throws IllegalArgumentException if either number is <code>NaN</code> |
| */ |
| public DoubleRange(Number number1, Number number2) { |
| super(); |
| if (number1 == null || number2 == null) { |
| throw new IllegalArgumentException("The numbers must not be null"); |
| } |
| double number1val = number1.doubleValue(); |
| double number2val = number2.doubleValue(); |
| if (Double.isNaN(number1val) || Double.isNaN(number2val)) { |
| throw new IllegalArgumentException("The numbers must not be NaN"); |
| } |
| if (number2val < number1val) { |
| this.min = number2val; |
| this.max = number1val; |
| if (number2 instanceof Double) { |
| this.minObject = (Double) number2; |
| } |
| if (number1 instanceof Double) { |
| this.maxObject = (Double) number1; |
| } |
| } else { |
| this.min = number1val; |
| this.max = number2val; |
| if (number1 instanceof Double) { |
| this.minObject = (Double) number1; |
| } |
| if (number2 instanceof Double) { |
| this.maxObject = (Double) number2; |
| } |
| } |
| } |
| |
| // Accessors |
| //-------------------------------------------------------------------- |
| |
| /** |
| * <p>Returns the minimum number in this range.</p> |
| * |
| * @return the minimum number in this range |
| */ |
| public Number getMinimumNumber() { |
| if (minObject == null) { |
| minObject = new Double(min); |
| } |
| return minObject; |
| } |
| |
| /** |
| * <p>Gets the minimum number in this range as a <code>long</code>.</p> |
| * |
| * <p>This conversion can lose information for large values or decimals.</p> |
| * |
| * @return the minimum number in this range |
| */ |
| public long getMinimumLong() { |
| return (long) min; |
| } |
| |
| /** |
| * <p>Gets the minimum number in this range as a <code>int</code>.</p> |
| * |
| * <p>This conversion can lose information for large values or decimals.</p> |
| * |
| * @return the minimum number in this range |
| */ |
| public int getMinimumInteger() { |
| return (int) min; |
| } |
| |
| /** |
| * <p>Gets the minimum number in this range as a <code>double</code>.</p> |
| * |
| * @return the minimum number in this range |
| */ |
| public double getMinimumDouble() { |
| return min; |
| } |
| |
| /** |
| * <p>Gets the minimum number in this range as a <code>float</code>.</p> |
| * |
| * <p>This conversion can lose information for large values.</p> |
| * |
| * @return the minimum number in this range |
| */ |
| public float getMinimumFloat() { |
| return (float) min; |
| } |
| |
| /** |
| * <p>Returns the maximum number in this range.</p> |
| * |
| * @return the maximum number in this range |
| */ |
| public Number getMaximumNumber() { |
| if (maxObject == null) { |
| maxObject = new Double(max); |
| } |
| return maxObject; |
| } |
| |
| /** |
| * <p>Gets the maximum number in this range as a <code>long</code>.</p> |
| * |
| * <p>This conversion can lose information for large values or decimals.</p> |
| * |
| * @return the maximum number in this range |
| */ |
| public long getMaximumLong() { |
| return (long) max; |
| } |
| |
| /** |
| * <p>Gets the maximum number in this range as a <code>int</code>.</p> |
| * |
| * <p>This conversion can lose information for large values or decimals.</p> |
| * |
| * @return the maximum number in this range |
| */ |
| public int getMaximumInteger() { |
| return (int) max; |
| } |
| |
| /** |
| * <p>Gets the maximum number in this range as a <code>double</code>.</p> |
| * |
| * @return the maximum number in this range |
| */ |
| public double getMaximumDouble() { |
| return max; |
| } |
| |
| /** |
| * <p>Gets the maximum number in this range as a <code>float</code>.</p> |
| * |
| * <p>This conversion can lose information for large values.</p> |
| * |
| * @return the maximum number in this range |
| */ |
| public float getMaximumFloat() { |
| return (float) max; |
| } |
| |
| // Tests |
| //-------------------------------------------------------------------- |
| |
| /** |
| * <p>Tests whether the specified <code>number</code> occurs within |
| * this range using <code>double</code> comparison.</p> |
| * |
| * <p><code>null</code> is handled and returns <code>false</code>.</p> |
| * |
| * @param number the number to test, may be <code>null</code> |
| * @return <code>true</code> if the specified number occurs within this range |
| */ |
| public boolean includesNumber(Number number) { |
| if (number == null) { |
| return false; |
| } |
| return includesDouble(number.doubleValue()); |
| } |
| |
| /** |
| * <p>Tests whether the specified <code>double</code> occurs within |
| * this range using <code>double</code> comparison.</p> |
| * |
| * <p>This implementation overrides the superclass for performance as it is |
| * the most common case.</p> |
| * |
| * @param value the double to test |
| * @return <code>true</code> if the specified number occurs within this |
| * range by <code>double</code> comparison |
| */ |
| public boolean includesDouble(double value) { |
| return (value >= min && value <= max); |
| } |
| |
| // Range tests |
| //-------------------------------------------------------------------- |
| |
| /** |
| * <p>Tests whether the specified range occurs entirely within this range |
| * using <code>double</code> comparison.</p> |
| * |
| * <p><code>null</code> is handled and returns <code>false</code>.</p> |
| * |
| * @param range the range to test, may be <code>null</code> |
| * @return <code>true</code> if the specified range occurs entirely within this range |
| * @throws IllegalArgumentException if the range is not of this type |
| */ |
| public boolean includesRange(Range range) { |
| if (range == null) { |
| return false; |
| } |
| return includesDouble(range.getMinimumDouble()) && |
| includesDouble(range.getMaximumDouble()); |
| } |
| |
| /** |
| * <p>Tests whether the specified range overlaps with this range |
| * using <code>double</code> comparison.</p> |
| * |
| * <p><code>null</code> is handled and returns <code>false</code>.</p> |
| * |
| * @param range the range to test, may be <code>null</code> |
| * @return <code>true</code> if the specified range overlaps with this range |
| */ |
| public boolean overlapsRange(Range range) { |
| if (range == null) { |
| return false; |
| } |
| return range.includesDouble(min) || |
| range.includesDouble(max) || |
| includesDouble(range.getMinimumDouble()); |
| } |
| |
| // Basics |
| //-------------------------------------------------------------------- |
| |
| /** |
| * <p>Compares this range to another object to test if they are equal.</p>. |
| * |
| * <p>To be equal, the class, minimum and maximum must be equal.</p> |
| * |
| * @param obj the reference object with which to compare |
| * @return <code>true</code> if this object is equal |
| */ |
| public boolean equals(Object obj) { |
| if (obj == this) { |
| return true; |
| } |
| if (obj instanceof DoubleRange == false) { |
| return false; |
| } |
| DoubleRange range = (DoubleRange) obj; |
| return (Double.doubleToLongBits(min) == Double.doubleToLongBits(range.min) && |
| Double.doubleToLongBits(max) == Double.doubleToLongBits(range.max)); |
| } |
| |
| /** |
| * <p>Gets a hashCode for the range.</p> |
| * |
| * @return a hash code value for this object |
| */ |
| public int hashCode() { |
| if (hashCode == 0) { |
| hashCode = 17; |
| hashCode = 37 * hashCode + getClass().hashCode(); |
| long lng = Double.doubleToLongBits(min); |
| hashCode = 37 * hashCode + ((int) (lng ^ (lng >> 32))); |
| lng = Double.doubleToLongBits(max); |
| hashCode = 37 * hashCode + ((int) (lng ^ (lng >> 32))); |
| } |
| return hashCode; |
| } |
| |
| /** |
| * <p>Gets the range as a <code>String</code>.</p> |
| * |
| * <p>The format of the String is 'Range[<i>min</i>,<i>max</i>]'.</p> |
| * |
| * @return the <code>String</code> representation of this range |
| */ |
| public String toString() { |
| if (toString == null) { |
| StringBuffer buf = new StringBuffer(32); |
| buf.append("Range["); |
| buf.append(min); |
| buf.append(','); |
| buf.append(max); |
| buf.append(']'); |
| toString = buf.toString(); |
| } |
| return toString; |
| } |
| |
| } |