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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,null,zone);
61 _fromJSON=fromJSON;
62 _format=new SimpleDateFormat(format);
63 _format.setTimeZone(zone);
64 }
65
66 public JSONDateConvertor(String format, TimeZone zone, boolean fromJSON, Locale locale)
67 {
68 _dateCache = new DateCache(format, locale, zone);
69 _fromJSON = fromJSON;
70 _format = new SimpleDateFormat(format, new DateFormatSymbols(locale));
71 _format.setTimeZone(zone);
72 }
73
74 public Object fromJSON(Map map)
75 {
76 if (!_fromJSON)
77 throw new UnsupportedOperationException();
78 try
79 {
80 synchronized(_format)
81 {
82 return _format.parseObject((String)map.get("value"));
83 }
84 }
85 catch(Exception e)
86 {
87 LOG.warn(e);
88 }
89 return null;
90 }
91
92 public void toJSON(Object obj, Output out)
93 {
94 String date = _dateCache.format((Date)obj);
95 if (_fromJSON)
96 {
97 out.addClass(obj.getClass());
98 out.add("value",date);
99 }
100 else
101 {
102 out.add(date);
103 }
104 }
105 }