ReusableBufferedOutputStream.java
/*
* Copyright (C) 2016 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 androidx.media3.datasource.cache;
import androidx.media3.common.util.Assertions;
import androidx.media3.common.util.UnstableApi;
import androidx.media3.common.util.Util;
import java.io.BufferedOutputStream;
import java.io.IOException;
import java.io.OutputStream;
/**
* This is a subclass of {@link BufferedOutputStream} with a {@link #reset(OutputStream)} method
* that allows an instance to be re-used with another underlying output stream.
*/
@UnstableApi
/* package */ final class ReusableBufferedOutputStream extends BufferedOutputStream {
private boolean closed;
public ReusableBufferedOutputStream(OutputStream out) {
super(out);
}
public ReusableBufferedOutputStream(OutputStream out, int size) {
super(out, size);
}
@Override
public void close() throws IOException {
closed = true;
Throwable thrown = null;
try {
flush();
} catch (Throwable e) {
thrown = e;
}
try {
out.close();
} catch (Throwable e) {
if (thrown == null) {
thrown = e;
}
}
if (thrown != null) {
Util.sneakyThrow(thrown);
}
}
/**
* Resets this stream and uses the given output stream for writing. This stream must be closed
* before resetting.
*
* @param out New output stream to be used for writing.
* @throws IllegalStateException If the stream isn't closed.
*/
public void reset(OutputStream out) {
Assertions.checkState(closed);
this.out = out;
count = 0;
closed = false;
}
}