1 /**
2 * The contents of this file are subject to the Mozilla Public License Version 1.1
3 * (the "License"); you may not use this file except in compliance with the License.
4 * You may obtain a copy of the License at http://www.mozilla.org/MPL/
5 * Software distributed under the License is distributed on an "AS IS" basis,
6 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License for the
7 * specific language governing rights and limitations under the License.
8 *
9 * The Original Code is "ReflectionUtil.java". Description:
10 * "Utility class for reflection"
11 *
12 * The Initial Developer of the Original Code is University Health Network. Copyright (C)
13 * 2001. All Rights Reserved.
14 *
15 * Contributor(s):
16 *
17 * Alternatively, the contents of this file may be used under the terms of the
18 * GNU General Public License (the �GPL�), in which case the provisions of the GPL are
19 * applicable instead of those above. If you wish to allow use of your version of this
20 * file only under the terms of the GPL and not to allow others to use your version
21 * of this file under the MPL, indicate your decision by deleting the provisions above
22 * and replace them with the notice and other provisions required by the GPL License.
23 * If you do not delete the provisions above, a recipient may use your version of
24 * this file under either the MPL or the GPL.
25 *
26 */
27 package ca.uhn.hl7v2.util;
28
29 import java.lang.reflect.Constructor;
30
31 import ca.uhn.hl7v2.HL7Exception;
32 import ca.uhn.hl7v2.model.Group;
33 import ca.uhn.hl7v2.model.Message;
34 import ca.uhn.hl7v2.model.Structure;
35 import ca.uhn.hl7v2.parser.ModelClassFactory;
36
37 public class ReflectionUtil {
38
39 /** Non instantiable */
40 private ReflectionUtil() {
41 // nothing
42 }
43
44 public static <T extends Structure> T instantiateStructure(Class<T> theType, Group parent,
45 ModelClassFactory theModelClassFactory) throws HL7Exception {
46 try {
47 Constructor<T> constructor = theType.getConstructor(Group.class,
48 ModelClassFactory.class);
49 return constructor.newInstance(parent, theModelClassFactory);
50 } catch (Exception e) {
51 throw new HL7Exception("Failed to instantiate type " + theType.getCanonicalName()
52 + ": ", e);
53 }
54 }
55
56 public static <T extends Message> T instantiateMessage(Class<T> theType,
57 ModelClassFactory theModelClassFactory) throws HL7Exception {
58 try {
59 Constructor<T> constructor = theType
60 .getConstructor(ModelClassFactory.class);
61 return constructor.newInstance(theModelClassFactory);
62 } catch (Exception e) {
63 throw new HL7Exception("Failed to instantiate type " + theType.getCanonicalName()
64 + ": ", e);
65 }
66 }
67
68 public static <T> T instantiate(Class<T> theType) throws HL7Exception {
69 try {
70 return theType.newInstance();
71 } catch (Exception e) {
72 throw new HL7Exception("Failed to instantiate type " + theType.getCanonicalName()
73 + ": ", e);
74 }
75 }
76
77 }