org.neo4j.kernel.impl.util.BytePrinter Maven / Gradle / Ivy

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/**
 * Copyright (c) 2002-2013 "Neo Technology,"
 * Network Engine for Objects in Lund AB [http://neotechnology.com]
 *
 * This file is part of Neo4j.
 *
 * Neo4j is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see .
 */
package org.neo4j.kernel.impl.util;

import java.io.ByteArrayOutputStream;
import java.io.PrintStream;
import java.io.UnsupportedEncodingException;
import java.nio.ByteBuffer;

/**
 * Utility to convert and print binary data in a human readable way.
 */
public class BytePrinter
{

    /**
     * Print a full byte buffer as nicely formatted groups of hex numbers.
     * Output looks like:
     *
     * 01 02 03 04 05 06 07 08    01 02 03 04 05 06 07 08    01 02 03 04 05 06 07 08    01 02 03 04 05 06 07 08
     * 01 02 03 04 05 06 07 08    01 02 03 04 05 06 07 08    01 02 03 04 05 06 07 08    01 02 03 04 05 06 07 08
     *
     * @param bytes
     * @param out
     */
    public static void print( ByteBuffer bytes, PrintStream out )
    {
        print( bytes, out, 0, bytes.capacity() );
    }

    /**
     * Print a subsection of a byte buffer as nicely formatted groups of hex numbers.
     * Output looks like:
     *
     * 01 02 03 04 05 06 07 08    01 02 03 04 05 06 07 08    01 02 03 04 05 06 07 08    01 02 03 04 05 06 07 08
     * 01 02 03 04 05 06 07 08    01 02 03 04 05 06 07 08    01 02 03 04 05 06 07 08    01 02 03 04 05 06 07 08
     *
     * @param bytes
     * @param out
     */
    public static void print( ByteBuffer bytes, PrintStream out, int offset, int length )
    {
        for(int i=offset;i