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Expires.java
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Expires.java
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/*
* The MIT License (MIT)
*
* Copyright (c) 2014-2018 Yegor Bugayenko
*
* 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.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
package org.takes.misc;
import java.text.SimpleDateFormat;
import java.util.Locale;
import java.util.TimeZone;
/**
* Expiration date in GMT.
*
* @since 2.0
*/
public interface Expires {
/**
* String representation of expiration time.
* @return Representation of expirate time.
*/
String print();
/**
* Never expires.
*/
final class Never implements Expires {
/**
* Original time.
*/
private final Expires origin;
/**
* Constructor.
*/
Never() {
this.origin = new Date(0L);
}
@Override
public String print() {
return this.origin.print();
}
}
/**
* Already expired. Returns "0" according to RFC7234.
*/
final class Expired implements Expires {
@Override
public String print() {
return "Expires=0";
}
}
/**
* Expires in one hour of the given time.
*/
final class Hour implements Expires {
/**
* Original time.
*/
private final Expires origin;
/**
* Constructor.
* @param origin Original time
*/
Hour(final Expires origin) {
this.origin = origin;
}
@Override
public String print() {
return this.origin.print();
}
}
/**
* Expiration date in GMT.
*
* @since 2.0
*/
final class Date implements Expires {
/**
* DateFormat for expiration.
*/
private final ThreadLocal<SimpleDateFormat> format;
/**
* Expires date.
*/
private final java.util.Date expires;
/**
* Ctor.
*
* <p>Will create instance with default format pattern.</p>
* @param expiration Expiration in millis
*/
public Date(final long expiration) {
this("'Expires='EEE, dd MMM yyyy HH:mm:ss z", expiration);
}
/**
* Ctor.
* @param ptn Date format pattern
* @param expiration Expiration in millis
*/
public Date(final String ptn, final long expiration) {
this(ptn, Locale.ENGLISH, expiration);
}
/**
* Ctor.
* @param ptn Date format pattern
* @param locale Locale
* @param expiration Expiration in millis
*/
public Date(final String ptn, final Locale locale,
final long expiration) {
this(ptn, locale, new java.util.Date(expiration));
}
/**
* Ctor.
* @param ptn Date format pattern
* @param locale Locale
* @param expires Date when expires
*/
public Date(final String ptn, final Locale locale,
final java.util.Date expires) {
this.format = ThreadLocal.withInitial(
() -> new SimpleDateFormat(ptn, locale)
);
this.expires = new java.util.Date(expires.getTime());
}
@Override
public String print() {
final SimpleDateFormat fmt = this.format.get();
fmt.setTimeZone(TimeZone.getTimeZone("GMT"));
return fmt.format(this.expires);
}
}
}