001/**
002The contents of this file are subject to the Mozilla Public License Version 1.1 
003(the "License"); you may not use this file except in compliance with the License. 
004You may obtain a copy of the License at http://www.mozilla.org/MPL/ 
005Software distributed under the License is distributed on an "AS IS" basis, 
006WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License for the 
007specific language governing rights and limitations under the License. 
008
009The Initial Developer of the Original Code is University Health Network. Copyright (C) 
0102001.  All Rights Reserved. 
011
012Contributor(s): Jens Kristian Villadsen from Cetrea A/S
013
014Alternatively, the contents of this file may be used under the terms of the 
015GNU General Public License (the "GPL"), in which case the provisions of the GPL are 
016applicable instead of those above.  If you wish to allow use of your version of this 
017file only under the terms of the GPL and not to allow others to use your version 
018of this file under the MPL, indicate your decision by deleting  the provisions above 
019and replace  them with the notice and other provisions required by the GPL License.  
020If you do not delete the provisions above, a recipient may use your version of 
021this file under either the MPL or the GPL. 
022
023*/
024
025
026package ca.uhn.hl7v2.llp;
027
028import java.nio.charset.Charset;
029
030import ca.uhn.hl7v2.parser.EncodingNotSupportedException;
031
032/**
033 * Charset utility class
034 * 
035 * @author Jens Kristian Villadsen from Cetrea A/S
036 */
037public class CharSetUtil
038{
039        /**
040         * Accepts a charset name as defined by HL7 (ie. an MSH-18 value) into
041         * a Java charset corresponding to that name
042         * 
043         * @param value
044         *            The MSH-18 field
045         * @return The MSH-18 field represented as CharSet
046         * @throws EncodingNotSupportedException
047         */
048        public static Charset convertHL7CharacterEncodingToCharSetvalue(String value) throws EncodingNotSupportedException
049        {
050                if(value == null)
051                {
052                        return Charset.forName("US-ASCII");
053                }
054
055                String trimmedString = value.trim().toUpperCase();
056                {
057                        if("".equals(trimmedString))
058                                return Charset.forName("US-ASCII");
059                        if("ASCII".equals(trimmedString))
060                                return Charset.forName("US-ASCII");
061                        if("8859/1".equals(trimmedString))
062                                return Charset.forName("ISO-8859-1");
063                        if("8859/2".equals(trimmedString))
064                                return Charset.forName("ISO-8859-2");
065                        if("8859/3".equals(trimmedString))
066                                return Charset.forName("ISO-8859-3");
067                        if("8859/4".equals(trimmedString))
068                                return Charset.forName("ISO-8859-4");
069                        if("8859/5".equals(trimmedString))
070                                return Charset.forName("ISO-8859-5");
071                        if("8859/6".equals(trimmedString))
072                                return Charset.forName("ISO-8859-6");
073                        if("8859/7".equals(trimmedString))
074                                return Charset.forName("ISO-8859-7");
075                        if("8859/8".equals(trimmedString))
076                                return Charset.forName("ISO-8859-8");
077                        if("8859/9".equals(trimmedString))
078                                return Charset.forName("ISO-8859-9");
079                        if("8859/15".equals(trimmedString))
080                                return Charset.forName("ISO-8859-15");
081                        if("UNICODE UTF-8".equals(trimmedString))
082                                return Charset.forName("UTF-8");
083                        if("UNICODE UTF-16".equals(trimmedString))
084                                return Charset.forName("UTF-16");
085                        if("UNICODE".equals(trimmedString))
086                                return Charset.forName("UTF-8");
087                }
088                throw new EncodingNotSupportedException(value);
089        }
090}