org.springframework.boot.maven.MavenBuildOutputTimestamp Maven / Gradle / Ivy
/*
* Copyright 2012-2023 the original author or authors.
*
* 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
*
* https://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.
*/
package org.springframework.boot.maven;
import java.nio.file.attribute.FileTime;
import java.time.Instant;
import java.time.OffsetDateTime;
import java.time.ZoneOffset;
import java.time.format.DateTimeParseException;
import java.time.temporal.ChronoUnit;
import org.springframework.util.StringUtils;
/**
* Parse output timestamp configured for Reproducible Builds' archive entries.
*
* Either as {@link java.time.format.DateTimeFormatter#ISO_OFFSET_DATE_TIME} or as a
* number representing seconds since the epoch (like SOURCE_DATE_EPOCH).
* Implementation inspired by MavenArchiver.
*
* @author Niels Basjes
* @author Moritz Halbritter
*/
class MavenBuildOutputTimestamp {
private static final Instant DATE_MIN = Instant.parse("1980-01-01T00:00:02Z");
private static final Instant DATE_MAX = Instant.parse("2099-12-31T23:59:59Z");
private final String timestamp;
/**
* Creates a new {@link MavenBuildOutputTimestamp}.
* @param timestamp timestamp or {@code null}
*/
MavenBuildOutputTimestamp(String timestamp) {
this.timestamp = timestamp;
}
/**
* Returns the parsed timestamp as an {@code FileTime}.
* @return the parsed timestamp as an {@code FileTime}, or {@code null}
* @throws IllegalArgumentException if the outputTimestamp is neither ISO 8601 nor an
* integer, or it's not within the valid range 1980-01-01T00:00:02Z to
* 2099-12-31T23:59:59Z
*/
FileTime toFileTime() {
Instant instant = toInstant();
if (instant == null) {
return null;
}
return FileTime.from(instant);
}
/**
* Returns the parsed timestamp as an {@code Instant}.
* @return the parsed timestamp as an {@code Instant}, or {@code null}
* @throws IllegalArgumentException if the outputTimestamp is neither ISO 8601 nor an
* integer, or it's not within the valid range 1980-01-01T00:00:02Z to
* 2099-12-31T23:59:59Z
*/
Instant toInstant() {
if (!StringUtils.hasLength(this.timestamp)) {
return null;
}
if (isNumeric(this.timestamp)) {
return Instant.ofEpochSecond(Long.parseLong(this.timestamp));
}
if (this.timestamp.length() < 2) {
return null;
}
try {
Instant instant = OffsetDateTime.parse(this.timestamp)
.withOffsetSameInstant(ZoneOffset.UTC)
.truncatedTo(ChronoUnit.SECONDS)
.toInstant();
if (instant.isBefore(DATE_MIN) || instant.isAfter(DATE_MAX)) {
throw new IllegalArgumentException(String
.format(String.format("'%s' is not within the valid range %s to %s", instant, DATE_MIN, DATE_MAX)));
}
return instant;
}
catch (DateTimeParseException pe) {
throw new IllegalArgumentException(String.format("Can't parse '%s' to instant", this.timestamp));
}
}
private static boolean isNumeric(String str) {
for (char c : str.toCharArray()) {
if (!Character.isDigit(c)) {
return false;
}
}
return true;
}
}