org.ikasan.connector.util.HexConverter Maven / Gradle / Ivy

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/*
 * ====================================================================
 * Ikasan Enterprise Integration Platform
 *
 * Distributed under the Modified BSD License.
 * Copyright notice: The copyright for this software and a full listing
 * of individual contributors are as shown in the packaged copyright.txt
 * file.
 *
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 *  - Redistributions of source code must retain the above copyright notice,
 *    this list of conditions and the following disclaimer.
 *
 *  - Redistributions in binary form must reproduce the above copyright notice,
 *    this list of conditions and the following disclaimer in the documentation
 *    and/or other materials provided with the distribution.
 *
 *  - Neither the name of the ORGANIZATION nor the names of its contributors may
 *    be used to endorse or promote products derived from this software without
 *    specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
 * USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 * ====================================================================
 */
package org.ikasan.connector.util;

/**
 * Hex converter responsible for converting to and from hex string.
 */
public class HexConverter
{
    public static String byteArrayToHex(byte[] a) {
        StringBuilder sb = new StringBuilder(a.length * 2);
        for(byte b: a)
            sb.append(String.format("%02x", b & 0xff));
        return sb.toString();
    }

    public static byte[] hexStringToByteArray(String s) {
        if(s==null){
            return null;
        }
        String trimedString = s.trim();
        int len = trimedString.length();
        int byteSize = len / 2;
        byte[] data = new byte[byteSize];
        for (int i = 0; i < len; i += 2) {
            data[i / 2] = (byte) ((Character.digit(trimedString.charAt(i), 16) << 4)
                    + Character.digit(trimedString.charAt(i+1), 16));
        }
        return data;
    }

}