CountingOutputStream.java

/*
 * Copyright (C) 2011, Google Inc. and others
 *
 * This program and the accompanying materials are made available under the
 * terms of the Eclipse Distribution License v. 1.0 which is available at
 * https://www.eclipse.org/org/documents/edl-v10.php.
 *
 * SPDX-License-Identifier: BSD-3-Clause
 */

package org.eclipse.jgit.util.io;

import java.io.IOException;
import java.io.OutputStream;

/**
 * Counts the number of bytes written.
 */
public class CountingOutputStream extends OutputStream {
    private final OutputStream out;
    private long cnt;

    /**
     * Initialize a new counting stream.
     *
     * @param out
     *            stream to output all writes to.
     */
    public CountingOutputStream(OutputStream out) {
        this.out = out;
    }

    /**
     * Get current number of bytes written.
     *
     * @return current number of bytes written.
     */
    public long getCount() {
        return cnt;
    }

    /** {@inheritDoc} */
    @Override
    public void write(int val) throws IOException {
        out.write(val);
        cnt++;
    }

    /** {@inheritDoc} */
    @Override
    public void write(byte[] buf, int off, int len) throws IOException {
        out.write(buf, off, len);
        cnt += len;
    }

    /** {@inheritDoc} */
    @Override
    public void flush() throws IOException {
        out.flush();
    }

    /** {@inheritDoc} */
    @Override
    public void close() throws IOException {
        out.close();
    }
}