com.lithium.flow.streams.CounterOutputStream Maven / Gradle / Ivy

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/*
 * Copyright 2015 Lithium Technologies, Inc.
 *
 * 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.lithium.flow.streams;

import java.io.FilterOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.util.concurrent.atomic.AtomicLong;

import javax.annotation.Nonnull;

/**
 * @author Matt Ayres
 */
public class CounterOutputStream extends FilterOutputStream {
	private final AtomicLong counter;

	public CounterOutputStream(OutputStream out, AtomicLong counter) {
		super(out);
		this.counter = counter;
	}

	@Override
	public void write(int b) throws IOException {
		out.write(b);
		counter.incrementAndGet();
	}

	@Override
	public void write(@Nonnull byte[] b) throws IOException {
		out.write(b);
		counter.addAndGet(b.length);
	}

	@Override
	public void write(@Nonnull byte[] b, int off, int len) throws IOException {
		out.write(b, off, len);
		counter.addAndGet(len);
	}
}