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  * Copyright (c) 2006 Henri Sivonen
  * Copyright (c) 2014 Mozilla Foundation
  * Permission is hereby granted, free of charge, to any person obtaining a 
  * copy of this software and associated documentation files (the "Software"), 
  * to deal in the Software without restriction, including without limitation 
  * the rights to use, copy, modify, merge, publish, distribute, sublicense, 
  * and/or sell copies of the Software, and to permit persons to whom the 
 * Software is furnished to do so, subject to the following conditions:
 * The above copyright notice and this permission notice shall be included in 
 * all copies or substantial portions of the Software.
package nu.validator.datatype;
This datatype shall accept strings that conform to the format specified for datetime attribute of the ins and del elements in Web Applications 1.0.

If the time zone designator is not "Z", the absolute value of the time zone designator must not exceed 12 hours.

This datatype must not accept the empty string.

Note that allowing a numeric time zone designator is not the only difference with datetime. This type requires seconds to be explicitly present.

public final class DatetimeTz extends AbstractDatetime {

The singleton instance.
    public static final DatetimeTz THE_INSTANCE = new DatetimeTz();

The rexexp for this datatype. See the capturing groups in the "valid global date and time string" check in AbstractDatetime#checkValid; those are groups 21 to 29, so we lead with 20 dummy capturing groups here to force the right number of capturing groups.
    private static final Pattern THE_PATTERN = Pattern.compile("^(.){0}(.){0}(.){0}(.){0}(.){0}(.){0}(.){0}(.){0}(.){0}(.){0}(.){0}(.){0}(.){0}(.){0}(.){0}(.){0}(.){0}(.){0}(.){0}(.){0}([0-9]{4,})-([0-9]{2})-([0-9]{2})[T ]([0-9]{2}):([0-9]{2})(?::([0-9]{2})(?:\\.([0-9]+))?)?(?:Z|(?:([+-][0-9]{2}):?([0-9]{2})))$");

    private DatetimeTz() {

Returns the regexp for this datatype.

the regexp for this datatype
See also:
    protected Pattern getPattern() {
        return ;
    public String getName() {
        return "datetime with timezone";
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