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/*
* Copyright (c) 2017, 2019, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* The Universal Permissive License (UPL), Version 1.0
*
* Subject to the condition set forth below, permission is hereby granted to any
* person obtaining a copy of this software, associated documentation and/or
* data (collectively the "Software"), free of charge and under any and all
* copyright rights in the Software, and any and all patent rights owned or
* freely licensable by each licensor hereunder covering either (i) the
* unmodified Software as contributed to or provided by such licensor, or (ii)
* the Larger Works (as defined below), to deal in both
*
* (a) the Software, and
*
* (b) any piece of software and/or hardware listed in the lrgrwrks.txt file if
* one is included with the Software each a "Larger Work" to which the Software
* is contributed by such licensors),
*
* without restriction, including without limitation the rights to copy, create
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* Software and the Larger Work(s), and to sublicense the foregoing rights on
* either these or other terms.
*
* This license is subject to the following condition:
*
* The above copyright notice and either this complete permission notice or at a
* minimum a reference to the UPL must be included in all copies or substantial
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*
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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package org.graalvm.polyglot.proxy;
import java.time.Instant;
import java.time.LocalDate;
import java.time.LocalTime;
import java.time.ZoneId;
import java.util.Objects;
import org.graalvm.polyglot.Value;
/**
* Interface to be implemented to mimic guest language objects that represents timestamps. This
* interface also implements {@link ProxyDate}, {@link ProxyTime} and {@link ProxyTimeZone}.
*
* @see Proxy
* @see Value
* @since 19.2.0
*/
public interface ProxyInstant extends ProxyDate, ProxyTime, ProxyTimeZone {
/**
* Returns the instant information. The returned value must not be null.
*
* The following invariant must always hold for instant proxies:
*
*
* ProxyInstant proxy = ...
* ZoneId zone = proxy.getTimeZone();
* LocalDate date = proxy.getDate();
* LocalTime time = proxy.getTime();
* assert ZonedDateTime.of(date, time, zone).equals(proxy.getInstant());
*
*
* @since 19.2.0
*/
Instant asInstant();
/**
* {@inheritDoc}
*
* The invariant specified in {@link #asInstant()} must always hold for proxy instant values.
*
* @see #asInstant()
* @since 19.2.0
*/
default LocalDate asDate() {
return asInstant().atZone(ProxyInstantConstants.UTC).toLocalDate();
}
/**
* {@inheritDoc}
*
* The invariant specified in {@link #asInstant()} must always hold for proxy instant values.
*
* @see #asInstant()
* @since 19.2.0
*/
default LocalTime asTime() {
return asInstant().atZone(ProxyInstantConstants.UTC).toLocalTime();
}
/**
* {@inheritDoc}
*
* The invariant specified in {@link #asInstant()} must always hold for proxy instant values.
*
* @see #asInstant()
* @since 19.2.0
*/
default ZoneId asTimeZone() {
return ProxyInstantConstants.UTC;
}
/**
* Creates a new proxy instant from a Java instant value.
*
* @since 19.2.0
*/
static ProxyInstant from(Instant instant) {
Objects.requireNonNull(instant);
return new ProxyInstant() {
@Override
public Instant asInstant() {
return instant;
}
};
}
}
class ProxyInstantConstants {
static final ZoneId UTC = ZoneId.of("UTC");
}
