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