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/*
* Copyright (C) 2007 The Guava Authors
*
* 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 org.sufficientlysecure.keychain.util;
import java.io.FilterOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import android.support.annotation.NonNull;
public final class CountingOutputStream extends FilterOutputStream {
private long count;
/**
* Wraps another output stream, counting the number of bytes written.
*
* @param out
* the output stream to be wrapped
*/
public CountingOutputStream(@NonNull OutputStream out) {
super(out);
}
/**
* Returns the number of bytes written.
*/
public long getCount() {
return count;
}
@Override
public void write(@NonNull byte[] b, int off, int len) throws IOException {
out.write(b, off, len);
count += len;
}
@Override
public void write(int b) throws IOException {
out.write(b);
count++;
}
// Overriding close() because FilterOutputStream's close() method pre-JDK8 has bad behavior:
// it silently ignores any exception thrown by flush(). Instead, just close the delegate stream.
// It should flush itself if necessary.
@Override
public void close() throws IOException {
out.close();
}
}
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