| /* |
| * Copyright (C) 2020 The Android Open Source Project |
| * |
| * 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 |
| * |
| * http://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 com.android.server.integrity.model; |
| |
| import java.io.IOException; |
| import java.io.OutputStream; |
| |
| /** |
| * An output stream that tracks the total number written bytes since construction and allows |
| * querying this value any time during the execution. |
| * |
| * This class is used for constructing the rule indexing. |
| */ |
| public class ByteTrackedOutputStream { |
| |
| private static int sWrittenBytesCount; |
| private static OutputStream sOutputStream; |
| |
| public ByteTrackedOutputStream(OutputStream outputStream) { |
| sWrittenBytesCount = 0; |
| sOutputStream = outputStream; |
| } |
| |
| /** |
| * Writes the given bytes into the output stream provided in constructor and updates the |
| * total number of written bytes. |
| */ |
| public void write(byte[] bytes) throws IOException { |
| sWrittenBytesCount += bytes.length; |
| sOutputStream.write(bytes); |
| } |
| |
| /** |
| * Returns the total number of bytes written into the output stream at the requested time. |
| */ |
| public int getWrittenBytesCount() { |
| return sWrittenBytesCount; |
| } |
| } |