47 lines
1.3 KiB
Java
47 lines
1.3 KiB
Java
package org.whispersystems.signalservice.api.util;
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import org.whispersystems.libsignal.util.guava.Optional;
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import java.nio.ByteBuffer;
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import java.util.UUID;
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import java.util.regex.Pattern;
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public final class UuidUtil {
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private static final Pattern UUID_PATTERN = Pattern.compile("[0-9a-f]{8}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{12}", Pattern.CASE_INSENSITIVE);
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private UuidUtil() { }
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public static Optional<UUID> parse(String uuid) {
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return Optional.fromNullable(parseOrNull(uuid));
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}
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public static UUID parseOrNull(String uuid) {
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return isUuid(uuid) ? parseOrThrow(uuid) : null;
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}
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public static UUID parseOrThrow(String uuid) {
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return UUID.fromString(uuid);
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}
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public static UUID parseOrThrow(byte[] bytes) {
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ByteBuffer byteBuffer = ByteBuffer.wrap(bytes);
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long high = byteBuffer.getLong();
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long low = byteBuffer.getLong();
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return new UUID(high, low);
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}
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public static boolean isUuid(String uuid) {
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return uuid != null && UUID_PATTERN.matcher(uuid).matches();
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}
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public static byte[] toByteArray(UUID uuid) {
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ByteBuffer buffer = ByteBuffer.wrap(new byte[16]);
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buffer.putLong(uuid.getMostSignificantBits());
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buffer.putLong(uuid.getLeastSignificantBits());
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return buffer.array();
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}
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}
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