mirror of https://github.com/M66B/FairEmail.git
72 lines
2.2 KiB
Java
72 lines
2.2 KiB
Java
/*
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* Copyright 2019 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 android.annotation.SuppressLint;
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import android.os.Build;
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import androidx.annotation.NonNull;
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import androidx.annotation.RestrictTo;
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import java.io.IOException;
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import java.io.InputStream;
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import java.io.OutputStream;
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import java.nio.channels.Channels;
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import java.nio.channels.FileChannel;
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import java.nio.channels.ReadableByteChannel;
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/**
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* File utilities 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 class FileUtil {
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/**
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* Copies data from the input channel to the output file channel.
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*
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* @param input the input channel to copy.
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* @param output the output channel to copy.
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* @throws IOException if there is an I/O error.
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*/
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@SuppressLint("LambdaLast")
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public static void copy(@NonNull ReadableByteChannel input, @NonNull FileChannel output)
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throws IOException {
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try {
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if (Build.VERSION.SDK_INT > Build.VERSION_CODES.M) {
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output.transferFrom(input, 0, Long.MAX_VALUE);
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} else {
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InputStream inputStream = Channels.newInputStream(input);
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OutputStream outputStream = Channels.newOutputStream(output);
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int length;
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byte[] buffer = new byte[1024 * 4];
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while ((length = inputStream.read(buffer)) > 0) {
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outputStream.write(buffer, 0, length);
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}
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}
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output.force(false);
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} finally {
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input.close();
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output.close();
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}
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}
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private FileUtil() {
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}
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}
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