Best Tools for JAVA/Best Tools for JAVA.iso/JAVA_ALL/JDBC/JDBC_011/JAVA/SQL/DATE.JAV

Text File | 1996-11-10 | 4.6 KB | 169 lines

/*
 * Copyright (c) 1996 Sun Microsystems, Inc. All Rights Reserved.
 *
 * Permission to use, copy, modify, and distribute this software
 * and its documentation for NON-COMMERCIAL purposes and without
 * fee is hereby granted provided that this copyright notice
 * appears in all copies. Please refer to the file "LICENSE"
 * for further important copyright and licensing information.
 *
 * SUN MAKES NO REPRESENTATIONS OR WARRANTIES ABOUT THE SUITABILITY OF
 * THE SOFTWARE, EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED
 * TO THE IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
 * PARTICULAR PURPOSE, OR NON-INFRINGEMENT. SUN SHALL NOT BE LIABLE FOR
 * ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING OR
 * DISTRIBUTING THIS SOFTWARE OR ITS DERIVATIVES.
 *
 * THIS SOFTWARE IS NOT DESIGNED OR INTENDED FOR USE OR RESALE AS ON-LINE
 * CONTROL EQUIPMENT IN HAZARDOUS ENVIRONMENTS REQUIRING FAIL-SAFE
 * PERFORMANCE, SUCH AS IN THE OPERATION OF NUCLEAR FACILITIES, AIRCRAFT
 * NAVIGATION OR COMMUNICATION SYSTEMS, AIR TRAFFIC CONTROL, DIRECT LIFE
 * SUPPORT MACHINES, OR WEAPONS SYSTEMS, IN WHICH THE FAILURE OF THE
 * SOFTWARE COULD LEAD DIRECTLY TO DEATH, PERSONAL INJURY, OR SEVERE
 * PHYSICAL OR ENVIRONMENTAL DAMAGE ("HIGH RISK ACTIVITIES").  SUN
 * SPECIFICALLY DISCLAIMS ANY EXPRESS OR IMPLIED WARRANTY OF FITNESS FOR
 * HIGH RISK ACTIVITIES.
 */

package java.sql;

/**
 * <P>This class is a thin wrapper around java.util.Date that allows
 * JDBC to identify this as a SQL DATE value. It adds formatting and
 * parsing operations to support the JDBC escape syntax for date
 * values.
 */
public class Date extends java.util.Date {

    /**
     * Construct a Date
     *
     * @param year year-1900
     * @param month 0 to 11
     * @param day 1 to 31
     */
    public Date(int year, int month, int day) {
    super(year, month, day);
    }

    /**
     * Construct a Date using a milliseconds time value
     *
     * @param date milliseconds since January 1, 1970, 00:00:00 GMT
     */
    public Date(long date) {
    // If the millisecond date value contains time info, mask it out.
    super(date);
    int year = getYear();
    int month = getMonth();
    int day = getDate();
    super.setTime(0);
    setYear(year);
    setMonth(month);
    setDate(day);
    }

    /**
     * Set a Date using a milliseconds time value
     *
     * @param date milliseconds since January 1, 1970, 00:00:00 GMT
     */
    public void setTime(long date) {
    // If the millisecond date value contains time info, mask it out.
    super.setTime(date);
    int year = getYear();
    int month = getMonth();
    int day = getDate();
    super.setTime(0);
    setYear(year);
    setMonth(month);
    setDate(day);
    }

    /**
     * Convert a string in JDBC date escape format to a Date value
     *
     * @param s date in format "yyyy-mm-dd"
     * @return corresponding Date
     */
    public static Date valueOf(String s) {
    int year;
    int month;
    int day;
    int firstDash;
    int secondDash;

    if (s == null) throw new java.lang.IllegalArgumentException();

    firstDash = s.indexOf('-');
    secondDash = s.indexOf('-', firstDash+1);
    if ((firstDash > 0) & (secondDash > 0) & (secondDash < s.length()-1)) {
        year = Integer.parseInt(s.substring(0, firstDash)) - 1900;
        month = Integer.parseInt(s.substring(firstDash+1, secondDash)) - 1;
        day = Integer.parseInt(s.substring(secondDash+1));
    } else {
        throw new java.lang.IllegalArgumentException();
    }

    return new Date(year, month, day);
    }

    /**
     * Format a date in JDBC date escape format
     *
     * @return a String in yyyy-mm-dd format
     */
    public String toString () {
    int year = super.getYear() + 1900;
    int month = super.getMonth() + 1;
    int day = super.getDate();
    String yearString;
    String monthString;
    String dayString;


    yearString = Integer.toString(year);

    if (month < 10) {
        monthString = "0" + month;
    } else {
        monthString = Integer.toString(month);
    }

    if (day < 10) {
        dayString = "0" + day;
    } else {
        dayString = Integer.toString(day);
    }

    return ( yearString + "-" + monthString + "-" + dayString);
    }

    // Override all the time operations inherited from java.util.Date;
    public int getHours() {
    throw new java.lang.IllegalArgumentException();
    }

    public int getMinutes() {
    throw new java.lang.IllegalArgumentException();
    }

    public int getSeconds() {
    throw new java.lang.IllegalArgumentException();
    }

    public void setHours(int i) {
    throw new java.lang.IllegalArgumentException();
    }

    public void setMinutes(int i) {
    throw new java.lang.IllegalArgumentException();
    }

    public void setSeconds(int i) {
    throw new java.lang.IllegalArgumentException();
    }

}