001/**
002 * The 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.
004 * You may obtain a copy of the License at http://www.mozilla.org/MPL/
005 * Software distributed under the License is distributed on an "AS IS" basis,
006 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License for the
007 * specific language governing rights and limitations under the License.
008 *
009 * The Original Code is "ReflectionUtil.java".  Description:
010 * "Utility class for reflection"
011 *
012 * The Initial Developer of the Original Code is University Health Network. Copyright (C)
013 * 2001.  All Rights Reserved.
014 *
015 * Contributor(s): 
016 *
017 * Alternatively, the contents of this file may be used under the terms of the
018 * GNU General Public License (the  �GPL�), in which case the provisions of the GPL are
019 * applicable instead of those above.  If you wish to allow use of your version of this
020 * file only under the terms of the GPL and not to allow others to use your version
021 * of this file under the MPL, indicate your decision by deleting  the provisions above
022 * and replace  them with the notice and other provisions required by the GPL License.
023 * If you do not delete the provisions above, a recipient may use your version of
024 * this file under either the MPL or the GPL.
025 *
026 */
027package ca.uhn.hl7v2.util;
028
029import java.lang.reflect.Constructor;
030import java.lang.reflect.InvocationTargetException;
031
032import ca.uhn.hl7v2.HL7Exception;
033import ca.uhn.hl7v2.model.Message;
034import ca.uhn.hl7v2.parser.ModelClassFactory;
035
036public class ReflectionUtil {
037
038        /** Non instantiable */
039        private ReflectionUtil() {
040                // nothing
041        }
042        
043        public static Message instantiateMessage(Class<? extends Message> theType, ModelClassFactory theModelClassFactory) throws HL7Exception {
044                try {
045                        Constructor<? extends Message> constructor = theType.getConstructor(new Class<?>[] {ModelClassFactory.class});
046                        Message message = constructor.newInstance(theModelClassFactory);
047                        return message;
048                } catch (SecurityException e) {
049                        throw new HL7Exception("Failed to instantiate message type " + theType.getCanonicalName() + ": ", e);
050                } catch (NoSuchMethodException e) {
051                        throw new HL7Exception("Failed to instantiate message type " + theType.getCanonicalName() + ": ", e);
052                } catch (IllegalArgumentException e) {
053                        throw new HL7Exception("Failed to instantiate message type " + theType.getCanonicalName() + ": ", e);
054                } catch (InstantiationException e) {
055                        throw new HL7Exception("Failed to instantiate message type " + theType.getCanonicalName() + ": ", e);
056                } catch (IllegalAccessException e) {
057                        throw new HL7Exception("Failed to instantiate message type " + theType.getCanonicalName() + ": ", e);
058                } catch (InvocationTargetException e) {
059                        throw new HL7Exception("Failed to instantiate message type " + theType.getCanonicalName() + ": ", e);
060                }
061        }
062        
063}