com.facebook.presto.jdbc.internal.airlift.slice.CountingOutputStream Maven / Gradle / Ivy
/*
* 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 com.facebook.presto.jdbc.internal.airlift.slice;
import javax.annotation.Nullable;
import java.io.FilterOutputStream;
import java.io.IOException;
import java.io.OutputStream;
/**
* An OutputStream that counts the number of bytes written.
*
* @author Chris Nokleberg
*/
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(@Nullable OutputStream out)
{
super(out);
}
/**
* Returns the number of bytes written.
*/
public long getCount()
{
return count;
}
@Override
public void write(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++;
}
}