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1
16 package org.apache.myfaces.taglib.core;
17
18 import java.util.ArrayList  ;
19 import java.util.Collection ;
20 import java.util.Enumeration ;
21 import java.util.HashSet ;
22 import java.util.List ;
23 import java.util.Locale ;
24 import java.util.Map ;
25 import java.util.MissingResourceException ;
26 import java.util.ResourceBundle ;
27 import java.util.Set ;
28
29 import javax.faces.component.UIViewRoot;
30 import javax.faces.context.FacesContext;
31 import javax.faces.webapp.UIComponentTag;
32 import javax.servlet.jsp.JspException ;
33 import javax.servlet.jsp.tagext.Tag ;
34 import javax.servlet.jsp.tagext.TagSupport ;
35
36 import org.apache.commons.logging.Log;
37 import org.apache.commons.logging.LogFactory;
38
39
68 public class LoadBundleTag
69 extends TagSupport
70 {
71 private static final Log log = LogFactory.getLog(LoadBundleTag.class);
72
73 private String _basename;
74 private String _var;
75
76 public void setBasename(String basename)
77 {
78 _basename = basename;
79 }
80
81 public void setVar(String var)
82 {
83 _var = var;
84 }
85
86 public int doStartTag() throws JspException
87 {
88 FacesContext facesContext = FacesContext.getCurrentInstance();
89 if (facesContext == null)
90 {
91 throw new JspException ("No faces context?!");
92 }
93
94 UIViewRoot viewRoot = facesContext.getViewRoot();
95 if (viewRoot == null)
96 {
97 throw new JspException ("No view root! LoadBundle must be nested inside <f:view> action.");
98 }
99
100 Locale locale = viewRoot.getLocale();
101 if (locale == null)
102 {
103 locale = facesContext.getApplication().getDefaultLocale();
104 }
105
106 String basename = null;
107
108 if (_basename!=null) {
109 if (UIComponentTag.isValueReference(_basename)) {
110 basename = (String )facesContext.getApplication().createValueBinding(_basename).getValue(facesContext);
111 } else {
112 basename = _basename;
113 }
114 }
115
116 final ResourceBundle bundle;
117 try
118 {
119 bundle = ResourceBundle.getBundle(basename, locale);
120 }
121 catch (MissingResourceException e)
122 {
123 log.error("Resource bundle '" + basename + "' could not be found.");
124 return Tag.SKIP_BODY;
125 }
126
127 facesContext.getExternalContext().getRequestMap().put(_var,
128 new BundleMap(bundle));
129 return Tag.SKIP_BODY;
130 }
131
132
133 private static class BundleMap implements Map
134 {
135 private ResourceBundle _bundle;
136 private List _values;
137
138 public BundleMap(ResourceBundle bundle)
139 {
140 _bundle = bundle;
141 }
142
143
145 public Object get(Object key)
146 {
147 try {
148 return _bundle.getObject(key.toString());
149 } catch (Exception e) {
150 return "MISSING: " + key + " :MISSING";
151 }
152 }
153
154 public boolean isEmpty()
155 {
156 return !_bundle.getKeys().hasMoreElements();
157 }
158
159 public boolean containsKey(Object key)
160 {
161 return _bundle.getObject(key.toString()) != null;
162 }
163
164
165
167 public Collection values()
168 {
169 if (_values == null)
170 {
171 _values = new ArrayList ();
172 for (Enumeration enumer = _bundle.getKeys(); enumer.hasMoreElements(); )
173 {
174 String v = _bundle.getString((String )enumer.nextElement());
175 _values.add(v);
176 }
177 }
178 return _values;
179 }
180
181 public int size()
182 {
183 return values().size();
184 }
185
186 public boolean containsValue(Object value)
187 {
188 return values().contains(value);
189 }
190
191 public Set entrySet()
192 {
193 Set set = new HashSet ();
194 for (Enumeration enumer = _bundle.getKeys(); enumer.hasMoreElements(); )
195 {
196 final String k = (String )enumer.nextElement();
197 set.add(new Map.Entry () {
198 public Object getKey()
199 {
200 return k;
201 }
202
203 public Object getValue()
204 {
205 return _bundle.getObject(k);
206 }
207
208 public Object setValue(Object value)
209 {
210 throw new UnsupportedOperationException (this.getClass().getName() + " UnsupportedOperationException");
211 }
212 });
213 }
214 return set;
215 }
216
217 public Set keySet()
218 {
219 Set set = new HashSet ();
220 for (Enumeration enumer = _bundle.getKeys(); enumer.hasMoreElements(); )
221 {
222 set.add(enumer.nextElement());
223 }
224 return set;
225 }
226
227
228
230 public Object remove(Object key)
231 {
232 throw new UnsupportedOperationException (this.getClass().getName() + " UnsupportedOperationException");
233 }
234
235 public void putAll(Map t)
236 {
237 throw new UnsupportedOperationException (this.getClass().getName() + " UnsupportedOperationException");
238 }
239
240 public Object put(Object key, Object value)
241 {
242 throw new UnsupportedOperationException (this.getClass().getName() + " UnsupportedOperationException");
243 }
244
245 public void clear()
246 {
247 throw new UnsupportedOperationException (this.getClass().getName() + " UnsupportedOperationException");
248 }
249
250 }
251
252 }
253 |
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