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319 lines
11 KiB
Java
319 lines
11 KiB
Java
/*
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* Copyright (c) 1996, 2020, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation. Oracle designates this
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* particular file as subject to the "Classpath" exception as provided
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* by Oracle in the LICENSE file that accompanied this code.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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package java.sql;
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import java.time.Instant;
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import java.time.LocalDate;
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/**
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* <P>A thin wrapper around a millisecond value that allows
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* JDBC to identify this as an SQL {@code DATE} value. A
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* milliseconds value represents the number of milliseconds that
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* have passed since January 1, 1970 00:00:00.000 GMT.
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* <p>
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* To conform with the definition of SQL {@code DATE}, the
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* millisecond values wrapped by a {@code java.sql.Date} instance
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* must be 'normalized' by setting the
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* hours, minutes, seconds, and milliseconds to zero in the particular
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* time zone with which the instance is associated.
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*
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* @since 1.1
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*/
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public class Date extends java.util.Date {
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/**
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* Constructs a {@code Date} object initialized with the given
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* year, month, and day.
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* <P>
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* The result is undefined if a given argument is out of bounds.
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*
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* @param year the year minus 1900; must be 0 to 8099. (Note that
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* 8099 is 9999 minus 1900.)
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* @param month 0 to 11
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* @param day 1 to 31
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* @deprecated instead use the constructor {@code Date(long date)}
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*/
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@Deprecated(since="1.2")
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public Date(int year, int month, int day) {
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super(year, month, day);
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}
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/**
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* Constructs a {@code Date} object using the given milliseconds
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* time value. If the given milliseconds value contains time
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* information, the driver will set the time components to the
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* time in the default time zone (the time zone of the Java virtual
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* machine running the application) that corresponds to zero GMT.
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*
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* @param date milliseconds since January 1, 1970, 00:00:00 GMT not
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* to exceed the milliseconds representation for the year 8099.
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* A negative number indicates the number of milliseconds
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* before January 1, 1970, 00:00:00 GMT.
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*/
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public Date(long date) {
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// If the millisecond date value contains time info, mask it out.
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super(date);
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}
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/**
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* Sets an existing {@code Date} object
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* using the given milliseconds time value.
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* If the given milliseconds value contains time information,
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* the driver will set the time components to the
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* time in the default time zone (the time zone of the Java virtual
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* machine running the application) that corresponds to zero GMT.
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*
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* @param date milliseconds since January 1, 1970, 00:00:00 GMT not
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* to exceed the milliseconds representation for the year 8099.
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* A negative number indicates the number of milliseconds
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* before January 1, 1970, 00:00:00 GMT.
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*/
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public void setTime(long date) {
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// If the millisecond date value contains time info, mask it out.
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super.setTime(date);
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}
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/**
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* Converts a string in JDBC date escape format to
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* a {@code Date} value.
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*
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* @param s a {@code String} object representing a date in
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* in the format "yyyy-[m]m-[d]d". The leading zero for {@code mm}
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* and {@code dd} may also be omitted.
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* @return a {@code java.sql.Date} object representing the
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* given date
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* @throws IllegalArgumentException if the date given is not in the
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* JDBC date escape format (yyyy-[m]m-[d]d)
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*/
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public static Date valueOf(String s) {
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if (s == null) {
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throw new java.lang.IllegalArgumentException();
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}
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final int YEAR_LENGTH = 4;
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final int MONTH_LENGTH = 2;
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final int DAY_LENGTH = 2;
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final int MAX_MONTH = 12;
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final int MAX_DAY = 31;
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Date d = null;
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int firstDash = s.indexOf('-');
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int secondDash = s.indexOf('-', firstDash + 1);
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int len = s.length();
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if ((firstDash > 0) && (secondDash > 0) && (secondDash < len - 1)) {
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if (firstDash == YEAR_LENGTH &&
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(secondDash - firstDash > 1 && secondDash - firstDash <= MONTH_LENGTH + 1) &&
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(len - secondDash > 1 && len - secondDash <= DAY_LENGTH + 1)) {
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int year = Integer.parseInt(s, 0, firstDash, 10);
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int month = Integer.parseInt(s, firstDash + 1, secondDash, 10);
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int day = Integer.parseInt(s, secondDash + 1, len, 10);
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if ((month >= 1 && month <= MAX_MONTH) && (day >= 1 && day <= MAX_DAY)) {
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d = new Date(year - 1900, month - 1, day);
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}
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}
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}
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if (d == null) {
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throw new java.lang.IllegalArgumentException();
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}
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return d;
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}
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/**
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* Formats a date in the date escape format yyyy-mm-dd.
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*
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* @return a String in yyyy-mm-dd format
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*/
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@SuppressWarnings("deprecation")
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public String toString () {
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int year = super.getYear() + 1900;
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int month = super.getMonth() + 1;
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int day = super.getDate();
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char buf[] = new char[10];
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formatDecimalInt(year, buf, 0, 4);
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buf[4] = '-';
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Date.formatDecimalInt(month, buf, 5, 2);
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buf[7] = '-';
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Date.formatDecimalInt(day, buf, 8, 2);
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return new String(buf);
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}
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/**
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* Formats an unsigned integer into a char array in decimal output format.
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* Numbers will be zero-padded or truncated if the string representation
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* of the integer is smaller than or exceeds len, respectively.
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*
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* Should consider moving this to Integer and expose it through
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* JavaLangAccess similar to Integer::formatUnsignedInt
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* @param val Value to convert
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* @param buf Array containing converted value
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* @param offset Starting pos in buf
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* @param len length of output value
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*/
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static void formatDecimalInt(int val, char[] buf, int offset, int len) {
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int charPos = offset + len;
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do {
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buf[--charPos] = (char)('0' + (val % 10));
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val /= 10;
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} while (charPos > offset);
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}
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// Override all the time operations inherited from java.util.Date;
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/**
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* This method is deprecated and should not be used because SQL Date
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* values do not have a time component.
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*
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* @deprecated
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* @throws java.lang.IllegalArgumentException if this method is invoked
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* @see #setHours
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*/
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@Deprecated(since="1.2")
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public int getHours() {
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throw new java.lang.IllegalArgumentException();
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}
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/**
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* This method is deprecated and should not be used because SQL Date
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* values do not have a time component.
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*
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* @deprecated
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* @throws java.lang.IllegalArgumentException if this method is invoked
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* @see #setMinutes
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*/
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@Deprecated(since="1.2")
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public int getMinutes() {
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throw new java.lang.IllegalArgumentException();
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}
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/**
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* This method is deprecated and should not be used because SQL Date
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* values do not have a time component.
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*
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* @deprecated
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* @throws java.lang.IllegalArgumentException if this method is invoked
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* @see #setSeconds
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*/
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@Deprecated(since="1.2")
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public int getSeconds() {
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throw new java.lang.IllegalArgumentException();
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}
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/**
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* This method is deprecated and should not be used because SQL Date
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* values do not have a time component.
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*
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* @deprecated
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* @throws java.lang.IllegalArgumentException if this method is invoked
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* @see #getHours
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*/
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@Deprecated(since="1.2")
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public void setHours(int i) {
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throw new java.lang.IllegalArgumentException();
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}
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/**
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* This method is deprecated and should not be used because SQL Date
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* values do not have a time component.
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*
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* @deprecated
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* @throws java.lang.IllegalArgumentException if this method is invoked
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* @see #getMinutes
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*/
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@Deprecated(since="1.2")
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public void setMinutes(int i) {
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throw new java.lang.IllegalArgumentException();
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}
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/**
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* This method is deprecated and should not be used because SQL Date
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* values do not have a time component.
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*
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* @deprecated
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* @throws java.lang.IllegalArgumentException if this method is invoked
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* @see #getSeconds
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*/
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@Deprecated(since="1.2")
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public void setSeconds(int i) {
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throw new java.lang.IllegalArgumentException();
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}
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/**
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* Private serial version unique ID to ensure serialization
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* compatibility.
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*/
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static final long serialVersionUID = 1511598038487230103L;
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/**
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* Obtains an instance of {@code Date} from a {@link LocalDate} object
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* with the same year, month and day of month value as the given
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* {@code LocalDate}.
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* <p>
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* The provided {@code LocalDate} is interpreted as the local date
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* in the local time zone.
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*
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* @param date a {@code LocalDate} to convert
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* @return a {@code Date} object
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* @throws NullPointerException if {@code date} is null
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* @since 1.8
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*/
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@SuppressWarnings("deprecation")
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public static Date valueOf(LocalDate date) {
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return new Date(date.getYear() - 1900, date.getMonthValue() -1,
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date.getDayOfMonth());
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}
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/**
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* Creates a {@code LocalDate} instance using the year, month and day
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* from this {@code Date} object.
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* @return a {@code LocalDate} object representing the same date value
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*
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* @since 1.8
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*/
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@SuppressWarnings("deprecation")
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public LocalDate toLocalDate() {
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return LocalDate.of(getYear() + 1900, getMonth() + 1, getDate());
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}
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/**
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* This method always throws an UnsupportedOperationException and should
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* not be used because SQL {@code Date} values do not have a time
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* component.
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*
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* @throws java.lang.UnsupportedOperationException if this method is invoked
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*/
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@Override
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public Instant toInstant() {
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throw new java.lang.UnsupportedOperationException();
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}
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}
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