/*
 * 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.lang;

import org.apache.commons.lang.text.StrBuilder;

Represents a range of Number objects.
This class uses double comparisons. This means that it
is unsuitable for dealing with large Long, BigDecimal
or BigInteger numbers.
Author:
Apache Software Foundation, Christopher Elkins
Since:
1.0
Version:
$Revision: 1057072 $ $Date: 2011-01-10 01:55:57 +0000 (Mon, 10 Jan 2011) $
Deprecated:
Use one of the Range classes in org.apache.commons.lang.math.
            Class will be removed in Commons Lang 3.0./**
 * <p>Represents a range of {@link Number} objects.</p>
 * 
 * <p>This class uses <code>double</code> comparisons. This means that it
 * is unsuitable for dealing with large <code>Long</code>, <code>BigDecimal</code>
 * or <code>BigInteger</code> numbers.</p>
 *
 * @author Apache Software Foundation
 * @author <a href="mailto:chrise@esha.com">Christopher Elkins</a>
 * @since 1.0
 * @version $Revision: 1057072 $ $Date: 2011-01-10 01:55:57 +0000 (Mon, 10 Jan 2011) $
 * 
 * @deprecated Use one of the Range classes in org.apache.commons.lang.math.
 *             Class will be removed in Commons Lang 3.0.
 * 
 */
public final class NumberRange {

    /* The minimum number in this range. */
    private final Number min;

    /* The maximum number in this range. */
    private final Number max;


    
Constructs a new NumberRange using
number as both the minimum and maximum in
this range.
Params:
num – the number to use for this range
Throws:
NullPointerException – if the number is null/**
     * <p>Constructs a new <code>NumberRange</code> using
     * <code>number</code> as both the minimum and maximum in
     * this range.</p>
     *
     * @param num the number to use for this range
     * @throws NullPointerException if the number is <code>null</code>
     */
    public NumberRange(Number num) {
        if (num == null) {
            throw new NullPointerException("The number must not be null");
        }

        this.min = num;
        this.max = num;
    }

    
Constructs a new NumberRange with the specified
minimum and maximum numbers.
If the maximum is less than the minimum, the range will be constructed
from the minimum value to the minimum value, not what you would expect!.
Params:
min – the minimum number in this range
max – the maximum number in this range
Throws:
NullPointerException – if either the minimum or maximum number is
 null/**
     * <p>Constructs a new <code>NumberRange</code> with the specified
     * minimum and maximum numbers.</p>
     * 
     * <p><em>If the maximum is less than the minimum, the range will be constructed
     * from the minimum value to the minimum value, not what you would expect!.</em></p>
     *
     * @param min the minimum number in this range
     * @param max the maximum number in this range
     * @throws NullPointerException if either the minimum or maximum number is
     *  <code>null</code>
     */
    public NumberRange(Number min, Number max) {
        if (min == null) {
            throw new NullPointerException("The minimum value must not be null");
        } else if (max == null) {
            throw new NullPointerException("The maximum value must not be null");
        }

        if (max.doubleValue() < min.doubleValue()) {
            this.min = this.max = min;
        } else {
            this.min = min;
            this.max = max;
        }
    }

    
Returns the minimum number in this range.
Returns:
the minimum number in this range/**
     * <p>Returns the minimum number in this range.</p>
     *
     * @return the minimum number in this range
     */
    public Number getMinimum() {
        return min;
    }

    
Returns the maximum number in this range.
Returns:
the maximum number in this range/**
     * <p>Returns the maximum number in this range.</p>
     *
     * @return the maximum number in this range
     */
    public Number getMaximum() {
        return max;
    }

    
Tests whether the specified number occurs within
this range using double comparison.
Params:
number – the number to test
Returns:
true if the specified number occurs within this
 range; otherwise, false/**
     * <p>Tests whether the specified <code>number</code> occurs within
     * this range using <code>double</code> comparison.</p>
     *
     * @param number the number to test
     * @return <code>true</code> if the specified number occurs within this
     *  range; otherwise, <code>false</code>
     */
    public boolean includesNumber(Number number) {
        if (number == null) {
            return false;
        } else {
            return !(min.doubleValue() > number.doubleValue()) &&
                !(max.doubleValue() < number.doubleValue());
        }
    }

    
Tests whether the specified range occurs entirely within this
range using double comparison.
Params:
range – the range to test
Returns:
true if the specified range occurs entirely within
 this range; otherwise, false/**
     * <p>Tests whether the specified range occurs entirely within this
     * range using <code>double</code> comparison.</p>
     *
     * @param range the range to test
     * @return <code>true</code> if the specified range occurs entirely within
     *  this range; otherwise, <code>false</code>
     */
    public boolean includesRange(NumberRange range) {
        if (range == null) {
            return false;
        } else {
            return includesNumber(range.min) && includesNumber(range.max);
        }
    }

    
Tests whether the specified range overlaps with this range
using double comparison.
Params:
range – the range to test
Returns:
true if the specified range overlaps with this
 range; otherwise, false/**
     * <p>Tests whether the specified range overlaps with this range
     * using <code>double</code> comparison.</p>
     *
     * @param range the range to test
     * @return <code>true</code> if the specified range overlaps with this
     *  range; otherwise, <code>false</code>
     */
    public boolean overlaps(NumberRange range) {
        if (range == null) {
            return false;
        } else {
            return range.includesNumber(min) || range.includesNumber(max) || 
                includesRange(range);
        }
    }

    
Indicates whether some other Object is
"equal" to this one.
Params:
obj – the reference object with which to compare
Returns:
true if this object is the same as the obj
 argument; false otherwise/**
     * <p>Indicates whether some other <code>Object</code> is
     * &quot;equal&quot; to this one.</p>
     *
     * @param obj the reference object with which to compare
     * @return <code>true</code> if this object is the same as the obj
     *  argument; <code>false</code> otherwise
     */
    public boolean equals(Object obj) {
        if (obj == this) {
            return true;
        } else if (!(obj instanceof NumberRange)) {
            return false;
        } else {
            NumberRange range = (NumberRange)obj;
            return min.equals(range.min) && max.equals(range.max);
        }
    }

    
Returns a hash code value for this object.
Returns:
a hash code value for this object/**
     * <p>Returns a hash code value for this object.</p>
     *
     * @return a hash code value for this object
     */
    public int hashCode() {
        int result = 17;
        result = 37 * result + min.hashCode();
        result = 37 * result + max.hashCode();
        return result;
    }

    
Returns the string representation of this range.
This string is the string representation of the minimum and
maximum numbers in the range, separated by a hyphen. If a number
is negative, then it is enclosed in parentheses.
Returns:
the string representation of this range/**
     * <p>Returns the string representation of this range.</p>
     *
     * <p>This string is the string representation of the minimum and
     * maximum numbers in the range, separated by a hyphen. If a number
     * is negative, then it is enclosed in parentheses.</p>
     *
     * @return the string representation of this range
     */
    public String toString() {
        StrBuilder sb = new StrBuilder();

        if (min.doubleValue() < 0) {
            sb.append('(')
                .append(min)
                .append(')');
        } else {
            sb.append(min);
        }

        sb.append('-');

        if (max.doubleValue() < 0) {
            sb.append('(')
                .append(max)
                .append(')');
        } else {
            sb.append(max);
        }

        return sb.toString();
    }

}