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1
5 package org.exoplatform.text.template;
6
7 import java.lang.reflect.Method  ;
8 import java.util.* ;
9
14 public class ReflectionBeanDataHandler implements DataHandler {
15 private static Object [] EMPTY_ARGS = {} ;
16 private static Map cache_ = new HashMap(300) ;
17
18 private Object bean_ ;
19 private Map methodMap_ ;
20 private Class type_ ;
21
22 public ReflectionBeanDataHandler(Class beanType) {
23 type_ = beanType ;
24 methodMap_ = getMethodMap(beanType) ;
25 }
26
27 public ReflectionBeanDataHandler(Object bean) {
28 bean_ = bean ;
29 type_ = bean.getClass() ;
30 methodMap_ = getMethodMap(type_) ;
31 }
32
33 public Class getDataTypeHandler() { return type_ ; }
34
35 public String getValueAsString(DataBindingValue value) {
36 try {
37 Method method = (Method )methodMap_.get(value.getMethodName()) ;
38 Object o = method.invoke(bean_, EMPTY_ARGS) ;
39 if(o == null) return "" ;
40 return o.toString();
41 } catch (Exception ex) {
42 return value.getExpression() + " has error: " + ex.getMessage();
43 }
44 }
45
46 public Object getValue(DataBindingValue value) {
47 try {
48 Method method = (Method )methodMap_.get(value.getMethodName()) ;
49 return method.invoke(bean_, EMPTY_ARGS) ;
50 } catch (Exception ex) {
51 return value.getExpression() + " has error: " + ex.getMessage();
52 }
53 }
54
55 public void setBean(Object bean) {
56 bean_ = bean ;
57 }
58
59 private Map getMethodMap(Class type) {
60 Map methodMap = (Map)cache_.get(type) ;
61 if(methodMap == null) {
62 synchronized(cache_) {
63 Method [] methods = type.getMethods() ;
64 methodMap = new HashMap() ;
65 for(int i = 0 ; i < methods.length; i++) {
66 if(methods[i].getParameterTypes().length == 0) {
67 methodMap.put(methods[i].getName(), methods[i]) ;
68 }
69 }
70 cache_.put(type, methodMap) ;
71 }
72 }
73 return methodMap ;
74 }
75 }
76 |
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