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Java example source code file (

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Java - Java tags/keywords

illegal, illegalargumentexception, illegalinstantexception, string

The Java example source code

 *  Copyright 2001-2013 Stephen Colebourne
 *  Licensed 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
 *  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.joda.time;

import org.joda.time.format.DateTimeFormat;

 * Exception thrown when attempting to create an instant or date-time that cannot exist.
 * <p>
 * Classes like {@code DateTime} only store valid date-times.
 * One of the cases where validity is important is handling daylight savings time (DST).
 * In many places DST is used, where the local clock moves forward by an hour in spring and back by an hour in autumn/fall.
 * This means that in spring, there is a "gap" where a local time does not exist.
 * <p>
 * This exception refers to this gap, and it means that your application tried to create
 * a date-time inside the gap - a time that did not exist.
 * Since Joda-Time objects must be valid, this is not allowed.
 * <p>
 * Possible solutions may be as follows:<br />
 * Use <code>LocalDateTime, as all local date-times are valid.
* When converting a <code>LocalDate to a DateTime, then use toDateTimeAsStartOfDay() * as this handles and manages any gaps.<br /> * When parsing, use <code>parseLocalDateTime() if the string being parsed has no time-zone. * * @author Stephen Colebourne * @since 2.2 */ public class IllegalInstantException extends IllegalArgumentException { /** Serialization lock. */ private static final long serialVersionUID = 2858712538216L; /** * Constructor. * * @param message the message */ public IllegalInstantException(String message) { super(message); } /** * Constructor. * * @param instantLocal the local instant * @param zoneId the time-zone ID, may be null */ public IllegalInstantException(long instantLocal, String zoneId) { super(createMessage(instantLocal, zoneId)); } private static String createMessage(long instantLocal, String zoneId) { String localDateTime = DateTimeFormat.forPattern("yyyy-MM-dd'T'HH:mm:ss.SSS").print(new Instant(instantLocal)); String zone = (zoneId != null ? " (" + zoneId + ")" : ""); return "Illegal instant due to time zone offset transition (daylight savings time 'gap'): " + localDateTime + zone; } //----------------------------------------------------------------------- /** * Checks if the exception is, or has a cause, of {@code IllegalInstantException}. * * @param ex the exception to check * @return true if an {@code IllegalInstantException} */ public static boolean isIllegalInstant(Throwable ex) { if (ex instanceof IllegalInstantException) { return true; } while (ex.getCause() != null && ex.getCause() != ex) { return isIllegalInstant(ex.getCause()); } return false; } }

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