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19 package org.eclipse.jetty.util.ajax;
20
21 import java.text.DateFormatSymbols;
22 import java.text.SimpleDateFormat;
23 import java.util.Date;
24 import java.util.Locale;
25 import java.util.Map;
26 import java.util.TimeZone;
27
28 import org.eclipse.jetty.util.DateCache;
29 import org.eclipse.jetty.util.ajax.JSON.Output;
30 import org.eclipse.jetty.util.log.Log;
31 import org.eclipse.jetty.util.log.Logger;
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39
40 public class JSONDateConvertor implements JSON.Convertor
41 {
42 private static final Logger LOG = Log.getLogger(JSONDateConvertor.class);
43
44 private final boolean _fromJSON;
45 private final DateCache _dateCache;
46 private final SimpleDateFormat _format;
47
48 public JSONDateConvertor()
49 {
50 this(false);
51 }
52
53 public JSONDateConvertor(boolean fromJSON)
54 {
55 this(DateCache.DEFAULT_FORMAT,TimeZone.getTimeZone("GMT"),fromJSON);
56 }
57
58 public JSONDateConvertor(String format,TimeZone zone,boolean fromJSON)
59 {
60 _dateCache=new DateCache(format);
61 _dateCache.setTimeZone(zone);
62 _fromJSON=fromJSON;
63 _format=new SimpleDateFormat(format);
64 _format.setTimeZone(zone);
65 }
66
67 public JSONDateConvertor(String format, TimeZone zone, boolean fromJSON, Locale locale)
68 {
69 _dateCache = new DateCache(format, locale);
70 _dateCache.setTimeZone(zone);
71 _fromJSON = fromJSON;
72 _format = new SimpleDateFormat(format, new DateFormatSymbols(locale));
73 _format.setTimeZone(zone);
74 }
75
76 public Object fromJSON(Map map)
77 {
78 if (!_fromJSON)
79 throw new UnsupportedOperationException();
80 try
81 {
82 synchronized(_format)
83 {
84 return _format.parseObject((String)map.get("value"));
85 }
86 }
87 catch(Exception e)
88 {
89 LOG.warn(e);
90 }
91 return null;
92 }
93
94 public void toJSON(Object obj, Output out)
95 {
96 String date = _dateCache.format((Date)obj);
97 if (_fromJSON)
98 {
99 out.addClass(obj.getClass());
100 out.add("value",date);
101 }
102 else
103 {
104 out.add(date);
105 }
106 }
107 }