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package org.interledger.codecs.ilp;

/*-
 * ========================LICENSE_START=================================
 * Interledger Core Codecs
 * %%
 * Copyright (C) 2017 - 2018 Hyperledger and its contributors
 * %%
 * 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
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * 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.
 * =========================LICENSE_END==================================
 */

import static org.interledger.encoding.asn.codecs.AsnSizeConstraint.UNCONSTRAINED;

import org.interledger.encoding.asn.codecs.AsnPrintableStringBasedObjectCodec;
import org.interledger.encoding.asn.codecs.AsnSizeConstraint;

import java.time.Instant;
import java.time.ZoneId;
import java.time.format.DateTimeFormatter;
import java.time.format.DateTimeFormatterBuilder;
import java.time.format.DateTimeParseException;
import java.time.temporal.ChronoField;
import java.util.regex.Pattern;

/**
 * 

An Interledger Timestamp represented internally as an {@link Instant}.

* *

Interledger uses ISO-8601 and not POSIX time, because ISO-8601 increases monotonically and never "travels back in * time", which could cause issues with transfer expiry date-time values. ISO-8601 is also one of the most widely * supported and most well-defined date formats, as of 2017.

* *

The wire format for Interledger date/time values leaves out any fixed/redundant characters, such as hyphens, * colons, the "T" separator, the decimal period, and the "Z" timezone indicator. * *

The wire format is four digits for the year, two digits for the month, two digits for the day, two digits for the * hour, two digits for the minutes, two digits for the seconds and three digits for the milliseconds.

* *

I.e. the wire format is: {@code YYYYMMDDHHmmSSfff}

* *

All date-time values MUST be expressed in UTC time.

*/ public class AsnTimestampCodec extends AsnPrintableStringBasedObjectCodec { private final DateTimeFormatter interledgerTimestampFormatter; /** * No-args constructor. */ public AsnTimestampCodec() { super(new AsnSizeConstraint(17)); setValidator(Pattern.compile("[0-9]{17}").asPredicate()); this.interledgerTimestampFormatter = new DateTimeFormatterBuilder() .appendValue(ChronoField.YEAR, 4) .appendValue(ChronoField.MONTH_OF_YEAR, 2) .appendValue(ChronoField.DAY_OF_MONTH, 2) .appendValue(ChronoField.HOUR_OF_DAY, 2) .appendValue(ChronoField.MINUTE_OF_HOUR, 2) .appendValue(ChronoField.SECOND_OF_MINUTE, 2) .appendFraction(ChronoField.MILLI_OF_SECOND, 3, 3, false) .toFormatter() .withZone(ZoneId.of("Z")); } @Override public Instant decode() { try { return Instant.from(interledgerTimestampFormatter.parse(getCharString())); } catch (DateTimeParseException dtp) { throw new IllegalArgumentException( String.format( "Interledger timestamps must conform to IL-RFC-27! Value %s is invalid.", getCharString() ), dtp ); } } @Override public void encode(Instant value) { setCharString(interledgerTimestampFormatter.format(value)); } }




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