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1
20 package org.enhydra.barracuda.contrib.dbroggisch.display;
21
22 import java.util.*;
23 import java.lang.reflect.*;
24 import org.apache.log4j.*;
25
26 public class ReflectionMapper {
27 private static Logger logger = Logger.getLogger(ReflectionMapper.class.getName());
28 static Map s_getters = new HashMap();
29
30 private static class Getter {
31 public Method method;
32 public String  name;
33 }
34
35 private static void createGetters(Class obj) {
36 try {
37 List getters = new ArrayList();
38 if(logger.isDebugEnabled()) {
39 logger.debug("Class " + obj);
40 }
41 Method [] ms = obj.getMethods();
42 for(int i = 1; i < ms.length; i++) {
43 String name = ms[i].getName();
44 if(logger.isDebugEnabled()) {
45 logger.debug("processing method " + name);
46 }
47 if(name.startsWith("get")) {
48 Getter g = new Getter();
49 g.method = ms[i];
50 g.name = name.substring(3).toUpperCase();
51 getters.add(g);
52 if(logger.isDebugEnabled()) {
53 logger.debug("Added Getter with name " + g.name);
54 }
55 }
56 }
57 s_getters.put(obj, getters);
58 } catch(SecurityException ex) {
59 }
60 }
61
62 private static synchronized List getGetters(Class klass) {
63 if(!s_getters.containsKey(klass)) {
64 createGetters(klass);
65 }
66 return (List)s_getters.get(klass);
67 }
68
69 public static List map(List objs) {
70 ArrayList res = new ArrayList(objs.size());
71 for(Iterator it = objs.iterator(); it.hasNext();) {
72 res.add(map(it.next()));
73 }
74 return res;
75 }
76
77 public static LightweightTemplateModel map(Object obj) {
78 return map(new HashMapModel(), obj);
79 }
80
81 public static LightweightTemplateModel map(LightweightTemplateModel model, Object obj) {
82 if(obj == null || model == null)
83 return model;
84
85 List getters = getGetters(obj.getClass());
86
87
88 for(Iterator it = getters.iterator(); it.hasNext();) {
89 try {
90 Getter g = (Getter)it.next();
91 Object value = g.method.invoke(obj, null);
92 if(logger.isDebugEnabled()) {
93 logger.debug("Value: " + value);
94 }
95 model.setItem(g.name, value);
96 } catch(IllegalAccessException ex) {
97 ex.printStackTrace();
98 } catch(InvocationTargetException ex) {
99 ex.printStackTrace();
100 }
101 }
102 return model;
103 }
104 }
105 |
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