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16 package javax.faces.convert;
17
18 import javax.faces.component.UIComponent;
19 import javax.faces.component.StateHolder;
20 import javax.faces.context.FacesContext;
21 import java.text.DateFormat  ;
22 import java.text.ParseException ;
23 import java.text.SimpleDateFormat ;
24 import java.util.Locale ;
25 import java.util.TimeZone ;
26
27
54 public class DateTimeConverter
55 implements Converter, StateHolder
56 {
57 private static final String CONVERSION_MESSAGE_ID = "javax.faces.convert.DateTimeConverter.CONVERSION";
58
59 public static final String CONVERTER_ID = "javax.faces.DateTime";
61 private static final String TYPE_DATE = "date";
62 private static final String TYPE_TIME = "time";
63 private static final String TYPE_BOTH = "both";
64 private static final String STYLE_DEFAULT = "default";
65 private static final String STYLE_MEDIUM = "medium";
66 private static final String STYLE_SHORT = "short";
67 private static final String STYLE_LONG = "long";
68 private static final String STYLE_FULL = "full";
69
70 private String _dateStyle;
71 private Locale _locale;
72 private String _pattern;
73 private String _timeStyle;
74 private TimeZone _timeZone;
75 private String _type;
76 private boolean _transient;
77
78 public DateTimeConverter()
80 {
81 }
82
83 public Object getAsObject(FacesContext facesContext, UIComponent uiComponent, String value)
85 {
86 if (facesContext == null) throw new NullPointerException ("facesContext");
87 if (uiComponent == null) throw new NullPointerException ("uiComponent");
88
89 if (value != null)
90 {
91 value = value.trim();
92 if (value.length() > 0)
93 {
94 DateFormat format = getDateFormat();
95 format.setLenient(true);
96 TimeZone tz = getTimeZone();
97 if( tz != null )
98 format.setTimeZone( tz );
99 try
100 {
101 return format.parse(value);
102 }
103 catch (ParseException e)
104 {
105 throw new ConverterException(_MessageUtils.getErrorMessage(facesContext,
106 CONVERSION_MESSAGE_ID,
107 new Object []{value,uiComponent.getId()}), e);
108 }
109 }
110 }
111 return null;
112 }
113
114 public String getAsString(FacesContext facesContext, UIComponent uiComponent, Object value)
115 {
116 if (facesContext == null) throw new NullPointerException ("facesContext");
117 if (uiComponent == null) throw new NullPointerException ("uiComponent");
118
119 if (value == null)
120 {
121 return "";
122 }
123 if (value instanceof String )
124 {
125 return (String )value;
126 }
127
128 DateFormat format = getDateFormat();
129 if (_timeZone != null)
130 {
131 format.setTimeZone(_timeZone);
132 }
133 try
134 {
135 return format.format(value);
136 }
137 catch (Exception e)
138 {
139 throw new ConverterException("Cannot convert value '" + value + "'");
140 }
141 }
142
143 private DateFormat getDateFormat()
144 {
145 String type = getType();
146 DateFormat format = null;
147 if (_pattern != null)
148 {
149 format = new SimpleDateFormat (_pattern, getLocale());
150 }
151 else if (type.equals(TYPE_DATE))
152 {
153 format = DateFormat.getDateInstance(calcStyle(getDateStyle()), getLocale());
154 }
155 else if (type.equals(TYPE_TIME))
156 {
157 format = DateFormat.getTimeInstance(calcStyle(getTimeStyle()), getLocale());
158 }
159 else if (type.equals(TYPE_BOTH))
160 {
161 format = DateFormat.getDateTimeInstance(calcStyle(getDateStyle()),
162 calcStyle(getTimeStyle()),
163 getLocale());
164 }
165 else
166 {
167 throw new ConverterException("invalid type '" + _type + "'");
168 }
169 return format;
170 }
171
172 private int calcStyle(String name)
173 {
174 if (name.equals(STYLE_DEFAULT))
175 {
176 return DateFormat.DEFAULT;
177 }
178 if (name.equals(STYLE_MEDIUM))
179 {
180 return DateFormat.MEDIUM;
181 }
182 if (name.equals(STYLE_SHORT))
183 {
184 return DateFormat.SHORT;
185 }
186 if (name.equals(STYLE_LONG))
187 {
188 return DateFormat.LONG;
189 }
190 if (name.equals(STYLE_FULL))
191 {
192 return DateFormat.FULL;
193 }
194
195 throw new ConverterException("invalid style '" + name + "'");
196 }
197
198 public void restoreState(FacesContext facesContext, Object state)
200 {
201 Object [] values = (Object [])state;
202 _dateStyle = (String )values[0];
203 _locale = (Locale )values[1];
204 _pattern = (String )values[2];
205 _timeStyle = (String )values[3];
206 _timeZone = (TimeZone )values[4];
207 _type = (String )values[5];
208 }
209
210 public Object saveState(FacesContext facesContext)
211 {
212 Object [] values = new Object [6];
213 values[0] = _dateStyle;
214 values[1] = _locale;
215 values[2] = _pattern;
216 values[3] = _timeStyle;
217 values[4] = _timeZone;
218 values[5] = _type;
219 return values;
220 }
221
222 public String getDateStyle()
224 {
225 return _dateStyle != null ? _dateStyle : STYLE_DEFAULT;
226 }
227
228 public void setDateStyle(String dateStyle)
229 {
230 _dateStyle = dateStyle;
232 }
233
234 public Locale getLocale()
235 {
236 if (_locale != null) return _locale;
237 FacesContext context = FacesContext.getCurrentInstance();
238 return context.getViewRoot().getLocale();
239 }
240
241 public void setLocale(Locale locale)
242 {
243 _locale = locale;
244 }
245
246 public String getPattern()
247 {
248 return _pattern;
249 }
250
251 public void setPattern(String pattern)
252 {
253 _pattern = pattern;
254 }
255
256 public String getTimeStyle()
257 {
258 return _timeStyle != null ? _timeStyle : STYLE_DEFAULT;
259 }
260
261 public void setTimeStyle(String timeStyle)
262 {
263 _timeStyle = timeStyle;
265 }
266
267 public TimeZone getTimeZone()
268 {
269 return _timeZone;
270 }
271
272 public void setTimeZone(TimeZone timeZone)
273 {
274 _timeZone = timeZone;
275 }
276
277 public boolean isTransient()
278 {
279 return _transient;
280 }
281
282 public void setTransient(boolean aTransient)
283 {
284 _transient = aTransient;
285 }
286
287 public String getType()
288 {
289 return _type != null ? _type : TYPE_DATE;
290 }
291
292 public void setType(String type)
293 {
294 _type = type;
296 }
297 }
298 |
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