| /* |
| * Copyright (C) 2023 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 android.util; |
| |
| import android.annotation.NonNull; |
| |
| import java.io.IOException; |
| import java.io.Writer; |
| import java.util.Objects; |
| |
| /** |
| * Writer that offers to "tee" identical output to multiple underlying |
| * {@link Writer} instances. |
| * |
| * @see https://man7.org/linux/man-pages/man1/tee.1.html |
| * @hide |
| */ |
| public class TeeWriter extends Writer { |
| private final @NonNull Writer[] mWriters; |
| |
| public TeeWriter(@NonNull Writer... writers) { |
| for (Writer writer : writers) { |
| Objects.requireNonNull(writer); |
| } |
| mWriters = writers; |
| } |
| |
| @Override |
| public void write(char[] cbuf, int off, int len) throws IOException { |
| for (Writer writer : mWriters) { |
| writer.write(cbuf, off, len); |
| } |
| } |
| |
| @Override |
| public void flush() throws IOException { |
| for (Writer writer : mWriters) { |
| writer.flush(); |
| } |
| } |
| |
| @Override |
| public void close() throws IOException { |
| for (Writer writer : mWriters) { |
| writer.close(); |
| } |
| } |
| } |