Main.java Source code

Introduction

Here is the source code for Main.java

Source

import java.io.UnsupportedEncodingException;
import java.util.Iterator;
import java.util.List;
import java.util.Map;

import javax.naming.InvalidNameException;

/*
 *  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. 
 *  
 */

/**
 * Various string manipulation methods that are more efficient then chaining
 * string operations: all is done in the same buffer without creating a bunch of
 * string objects.
 * 
 * @author <a href="mailto:dev@labs.apache.org">Dungeon Project</a>
 */
public class Main {
    /** &lt;hex> ::= [0x30-0x39] | [0x41-0x46] | [0x61-0x66] */
    private static final byte[] HEX_VALUE = { -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, // 00 -> 0F
            -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, // 10 -> 1F
            -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, // 20 -> 2F
            0, 1, 2, 3, 4, 5, 6, 7, 8, 9, -1, -1, -1, -1, -1, -1, // 30 -> 3F ( 0, 1,2, 3, 4,5, 6, 7, 8, 9 )
            -1, 10, 11, 12, 13, 14, 15, -1, -1, -1, -1, -1, -1, -1, -1, -1, // 40 -> 4F ( A, B, C, D, E, F )
            -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, // 50 -> 5F
            -1, 10, 11, 12, 13, 14, 15, -1, -1, -1, -1, -1, -1, -1, -1, -1 // 60 -> 6F ( a, b, c, d, e, f )
    };

    /**
     * Decodes values of attributes in the DN encoded in hex into a UTF-8 
     * String.  RFC2253 allows a DN's attribute to be encoded in hex.
     * The encoded value starts with a # then is followed by an even 
     * number of hex characters.  
     */
    public static final String decodeHexString(String str) throws InvalidNameException {
        if (str == null || str.length() == 0) {
            throw new InvalidNameException("Expected string to start with a '#' character.  "
                    + "Invalid hex encoded string for empty or null string.");
        }

        char[] chars = str.toCharArray();
        if (chars[0] != '#') {
            throw new InvalidNameException(
                    "Expected string to start with a '#' character.  " + "Invalid hex encoded string: " + str);
        }

        // the bytes representing the encoded string of hex
        // this should be ( length - 1 )/2 in size
        byte[] decoded = new byte[(chars.length - 1) >> 1];

        for (int ii = 1, jj = 0; ii < chars.length; ii += 2, jj++) {
            int ch = (HEX_VALUE[chars[ii]] << 4) + HEX_VALUE[chars[ii + 1]];
            decoded[jj] = (byte) ch;
        }

        return utf8ToString(decoded);
    }

    /**
     * Return an UTF-8 encoded String
     * 
     * @param bytes
     *            The byte array to be transformed to a String
     * @return A String.
     */
    public static final String utf8ToString(byte[] bytes) {
        if (bytes == null) {
            return "";
        }

        try {
            return new String(bytes, "UTF-8");
        } catch (UnsupportedEncodingException uee) {
            return "";
        }
    }
}