mirror of https://github.com/M66B/FairEmail.git
65 lines
1.9 KiB
Java
65 lines
1.9 KiB
Java
/*
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* Copyright 2021 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package androidx.room.util;
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import androidx.annotation.NonNull;
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import androidx.annotation.RestrictTo;
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import java.nio.ByteBuffer;
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import java.util.UUID;
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/**
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* UUID / byte[] two-way conversion utility for Room
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*
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* @hide
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*/
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@RestrictTo(RestrictTo.Scope.LIBRARY_GROUP_PREFIX)
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public final class UUIDUtil {
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// private constructor to prevent instantiation
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private UUIDUtil() {}
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/**
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* Converts a 16-bytes array BLOB into a UUID pojo
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*
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* @param bytes byte array stored in database as BLOB
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* @return a UUID object created based on the provided byte array
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*/
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@NonNull
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public static UUID convertByteToUUID(@NonNull byte[] bytes) {
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ByteBuffer buffer = ByteBuffer.wrap(bytes);
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long firstLong = buffer.getLong();
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long secondLong = buffer.getLong();
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return new UUID(firstLong, secondLong);
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}
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/**
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* Converts a UUID pojo into a 16-bytes array to store into database as BLOB
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*
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* @param uuid the UUID pojo
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* @return a byte array to store into database
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*/
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@NonNull
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public static byte[] convertUUIDToByte(@NonNull UUID uuid) {
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byte[] bytes = new byte[16];
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ByteBuffer buffer = ByteBuffer.wrap(bytes);
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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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