com.liferay.portal.kernel.io.unsync.UnsyncBufferedOutputStream.java Source code

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Here is the source code for com.liferay.portal.kernel.io.unsync.UnsyncBufferedOutputStream.java

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/**
 * Copyright (c) 2000-present Liferay, Inc. All rights reserved.
 *
 * This library is free software; you can redistribute it and/or modify it under
 * the terms of the GNU Lesser General Public License as published by the Free
 * Software Foundation; either version 2.1 of the License, or (at your option)
 * any later version.
 *
 * This library is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
 * FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
 * details.
 */

package com.liferay.portal.kernel.io.unsync;

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

/**
 * <p>
 * See https://issues.liferay.com/browse/LPS-6648.
 * </p>
 *
 * @author Shuyang Zhou
 */
public class UnsyncBufferedOutputStream extends UnsyncFilterOutputStream {

    public UnsyncBufferedOutputStream(OutputStream outputStream) {
        this(outputStream, _DEFAULT_BUFFER_SIZE);
    }

    public UnsyncBufferedOutputStream(OutputStream outputStream, int size) {
        super(outputStream);

        if (size <= 0) {
            throw new IllegalArgumentException("Size is less than 0");
        }

        buffer = new byte[size];
    }

    @Override
    public void flush() throws IOException {
        if (count > 0) {
            outputStream.write(buffer, 0, count);

            count = 0;
        }

        outputStream.flush();
    }

    @Override
    public void write(byte[] bytes) throws IOException {
        write(bytes, 0, bytes.length);
    }

    @Override
    public void write(byte[] bytes, int offset, int length) throws IOException {
        if (length >= buffer.length) {
            if (count > 0) {
                outputStream.write(buffer, 0, count);

                count = 0;
            }

            outputStream.write(bytes, offset, length);

            return;
        }

        if ((count > 0) && (length > (buffer.length - count))) {
            outputStream.write(buffer, 0, count);

            count = 0;
        }

        System.arraycopy(bytes, offset, buffer, count, length);

        count += length;
    }

    @Override
    public void write(int b) throws IOException {
        if (count >= buffer.length) {
            outputStream.write(buffer, 0, count);

            count = 0;
        }

        buffer[count++] = (byte) b;
    }

    protected byte[] buffer;
    protected int count;

    private static final int _DEFAULT_BUFFER_SIZE = 8192;

}