Sunny Goyal
05f30889d6
Adding a schema file for handling DB downgrade. This schema file is part of the backup/restore set, and hence is available on a device with lower app version. Bug: 37257575 Change-Id: I69c8ef5f28d5209be6e6679412c7459d4eeda5d0
56 lines
1.6 KiB
Java
56 lines
1.6 KiB
Java
/*
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* Copyright (C) 2017 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 com.android.launcher3.util;
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import java.io.ByteArrayOutputStream;
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import java.io.File;
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import java.io.FileInputStream;
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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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/**
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* Supports various IO utility functions
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*/
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public class IOUtils {
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private static final int BUF_SIZE = 0x1000; // 4K
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public static byte[] toByteArray(File file) throws IOException {
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try (InputStream in = new FileInputStream(file)) {
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return toByteArray(in);
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}
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}
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public static byte[] toByteArray(InputStream in) throws IOException {
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ByteArrayOutputStream out = new ByteArrayOutputStream();
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copy(in, out);
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return out.toByteArray();
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}
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public static long copy(InputStream from, OutputStream to) throws IOException {
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byte[] buf = new byte[BUF_SIZE];
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long total = 0;
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int r;
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while ((r = from.read(buf)) != -1) {
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to.write(buf, 0, r);
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total += r;
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}
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return total;
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}
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}
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