Util.java Source code

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Here is the source code for Util.java

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/*
 *  Licensed to the Apache Software Foundation (ASF) under one
 *  or more contributor license agreements.  See the NOTICE file
 *  distributed with this work for additional information
 *  regarding copyright ownership.  The ASF licenses this file
 *  to you 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.
 *
 */

/**
 * ByteUtilities.java - Byte manipulation functions.
 * 
 * @author <a href="http://mina.apache.org">Apache MINA Project</a>
 * @since MINA 2.0.0-M3
 */
public class Util {

    /**
     * Returns a hexadecimal representation of the given byte array.
     * 
     * @param bytes the array to output to an hex string
     * @return the hex representation as a string
     */
    public static String asHex(byte[] bytes) {
        return asHex(bytes, null);
    }

    /**
     * Returns a hexadecimal representation of the given byte array.
     * 
     * @param bytes the array to output to an hex string
     * @param separator the separator to use between each byte in the output
     * string. If null no char is inserted between each byte value. 
     * @return the hex representation as a string
     */
    public static String asHex(byte[] bytes, String separator) {
        StringBuilder sb = new StringBuilder();
        for (int i = 0; i < bytes.length; i++) {
            String code = Integer.toHexString(bytes[i] & 0xFF);
            if ((bytes[i] & 0xFF) < 16) {
                sb.append('0');
            }

            sb.append(code);

            if (separator != null && i < bytes.length - 1) {
                sb.append(separator);
            }
        }

        return sb.toString();
    }

}