package org.apache.archiva.checksum;

/*
 * 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.
 */

/**
 * Hex - simple hex conversions. 
 *
 *
 */
public class Hex
{
    private static final byte[] DIGITS = "0123456789abcdef".getBytes();

    public static String encode( byte[] data )
    {
        int l = data.length;

        byte[] raw = new byte[l * 2];

        for ( int i = 0, j = 0; i < l; i++ )
        {
            raw[j++] = DIGITS[( 0xF0 & data[i] ) >>> 4];
            raw[j++] = DIGITS[0x0F & data[i]];
        }

        return new String( raw );
    }

    public static String encode( String raw )
    {
        return encode( raw.getBytes() );
    }

}
