pair.java

定时器开源项目, 相对于 jcrontab, Quartz 算是更完整的一个项目, 随著开发的版本上来, 他已经脱离只是写在程序里面的计时器, 在指定的时间或区间, 处理所指定的事件. 也加入了 se

/*
 * Copyright James House (c) 2001-2004
 * 
 * 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.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND ANY
 * EXPRESS 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 AUTHOR OR 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.
 *  
 */

package org.quartz.utils;

/**
 * <p>
 * Utility class for storing two pieces of information together.
 * </p>
 * 
 * @author <a href="mailto:[e-mail]">Jeffrey Wescott</a>
 */
public class Pair {

    /*
     * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
     * 
     * Data members.
     * 
     * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
     */

    private Object first;

    private Object second;

    /*
     * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
     * 
     * Interface.
     * 
     * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
     */

    /**
     * <p>
     * Get the first object in the pair.
     * </p>
     * 
     * @return the first object
     */
    public final Object getFirst() {
        return first;
    }

    /**
     * <p>
     * Set the value of the first object in the pair.
     * </p>
     * 
     * @param first
     *          the first object
     */
    public final void setFirst(Object first) {
        this.first = first;
    }

    /**
     * <p>
     * Get the second object in the pair.
     * </p>
     * 
     * @return the second object
     */
    public final Object getSecond() {
        return second;
    }

    /**
     * <p>
     * Set the second object in the pair.
     * </p>
     * 
     * @param second
     *          the second object
     */
    public final void setSecond(Object second) {
        this.second = second;
    }

    /**
     * <p>
     * Test equality of this object with that.
     * </p>
     * 
     * @param that
     *          object to compare
     * @return true if objects are equal, false otherwise
     */
    public boolean equals(Object that) {
        if (this == that) {
            return true;
        } else {
            try {
                Pair other = (Pair) that;
                return (this.first.equals(other.first) && this.second
                        .equals(other.second));
            } catch (ClassCastException e) {
                return false;
            }
        }
    }
}

// EOF