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1
17
18 package javax.el;
19
20 import java.beans.FeatureDescriptor  ;
21 import java.util.ArrayList ;
22 import java.util.Enumeration ;
23 import java.util.Iterator ;
24 import java.util.List ;
25 import java.util.MissingResourceException ;
26 import java.util.ResourceBundle ;
27
28 public class ResourceBundleELResolver extends ELResolver {
29
30 public ResourceBundleELResolver() {
31 super();
32 }
33
34 public Object getValue(ELContext context, Object base, Object property)
35 throws NullPointerException , PropertyNotFoundException, ELException {
36 if (context == null) {
37 throw new NullPointerException ();
38 }
39
40 if (base instanceof ResourceBundle ) {
41 context.setPropertyResolved(true);
42
43 if (property != null) {
44 try {
45 return ((ResourceBundle ) base).getObject(property
46 .toString());
47 } catch (MissingResourceException mre) {
48 return "???" + property.toString() + "???";
49 }
50 }
51 }
52
53 return null;
54 }
55
56 public Class <?> getType(ELContext context, Object base, Object property)
57 throws NullPointerException , PropertyNotFoundException, ELException {
58 if (context == null) {
59 throw new NullPointerException ();
60 }
61
62 if (base instanceof ResourceBundle ) {
63 context.setPropertyResolved(true);
64 }
65
66 return null;
67 }
68
69 public void setValue(ELContext context, Object base, Object property,
70 Object value) throws NullPointerException ,
71 PropertyNotFoundException, PropertyNotWritableException,
72 ELException {
73 if (context == null) {
74 throw new NullPointerException ();
75 }
76
77 if (base instanceof ResourceBundle ) {
78 context.setPropertyResolved(true);
79 throw new PropertyNotWritableException(message(context,
80 "resolverNotWriteable", new Object [] { base.getClass()
81 .getName() }));
82 }
83 }
84
85 public boolean isReadOnly(ELContext context, Object base, Object property)
86 throws NullPointerException , PropertyNotFoundException, ELException {
87 if (context == null) {
88 throw new NullPointerException ();
89 }
90
91 if (base instanceof ResourceBundle ) {
92 context.setPropertyResolved(true);
93 }
94
95 return true;
96 }
97
98 public Iterator <FeatureDescriptor > getFeatureDescriptors(ELContext context, Object base) {
99 if (base instanceof ResourceBundle ) {
100 List <FeatureDescriptor > feats = new ArrayList <FeatureDescriptor >();
101 Enumeration e = ((ResourceBundle ) base).getKeys();
102 FeatureDescriptor feat;
103 String key;
104 while (e.hasMoreElements()) {
105 key = (String ) e.nextElement();
106 feat = new FeatureDescriptor ();
107 feat.setDisplayName(key);
108 feat.setExpert(false);
109 feat.setHidden(false);
110 feat.setName(key);
111 feat.setPreferred(true);
112 feat.setValue(RESOLVABLE_AT_DESIGN_TIME, Boolean.TRUE);
113 feat.setValue(TYPE, String .class);
114 feats.add(feat);
115 }
116 return feats.iterator();
117 }
118 return null;
119 }
120
121 public Class <?> getCommonPropertyType(ELContext context, Object base) {
122 if (base instanceof ResourceBundle ) {
123 return String .class;
124 }
125 return null;
126 }
127
128 }
129 |
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