001    /*
002     * Copyright (c) 2000 - 2006 The Legion Of The Bouncy Castle (http://www.bouncycastle.org)
003     * 
004     * Permission is hereby granted, free of charge, to any person obtaining a copy of this
005     * software and associated documentation files (the "Software"), to deal in the Software
006     * without restriction, including without limitation the rights to use, copy, modify,
007     * merge, publish, distribute, sublicense, and/or sell copies of the Software, and to
008     * permit persons to whom the Software is furnished to do so, subject to the following
009     * conditions:
010     * 
011     * The above copyright notice and this permission notice shall be included in all copies
012     * or substantial portions of the Software.
013     * 
014     * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
015     * INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
016     * PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE
017     * FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
018     * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
019     * DEALINGS IN THE SOFTWARE.
020     * 
021     */
022    
023    package org.apache.directory.shared.asn1.der;
024    
025    
026    import java.io.UnsupportedEncodingException;
027    
028    
029    /**
030     * Interface for DER string objects.
031     */
032    public abstract class DERString extends DERObject
033    {
034        /**
035         * Basic DERObject constructor.
036         */
037        DERString(int tag, byte[] value)
038        {
039            super( tag, value );
040        }
041    
042    
043        /**
044         * Lazy accessor.
045         * 
046         * @return underlying byte array converted to a String
047         */
048        public String getString()
049        {
050            return byteArrayToString( value );
051        }
052    
053    
054        /**
055         * Utility method for converting byte arrays to Strings.
056         * 
057         * @param bytes
058         * @return String
059         */
060        protected static String byteArrayToString( byte[] bytes )
061        {
062            try
063            {
064                return new String( bytes, "UTF-8" );
065            }
066            catch ( UnsupportedEncodingException uee )
067            {
068                return "";
069            }
070        }
071    
072    
073        /**
074         * Utility method for converting Strings to bytes.
075         * 
076         * @param string
077         * @return bytes
078         */
079        protected static byte[] stringToByteArray( String string )
080        {
081            try
082            {
083                return string.getBytes( "UTF-8" );
084            }
085            catch ( UnsupportedEncodingException uee )
086            {
087                return new byte[]
088                    {};
089            }
090        }
091    }