org.mortbay.util.ajax.JSONDateConvertor Maven / Gradle / Ivy
//========================================================================
//Copyright 2004-2008 Mort Bay Consulting Pty. Ltd.
//------------------------------------------------------------------------
//Licensed under the Apache License, Version 2.0 (the "License");
//you may not use this file except in compliance with the License.
//You may obtain a copy of the License at
//http://www.apache.org/licenses/LICENSE-2.0
//Unless required by applicable law or agreed to in writing, software
//distributed under the License is distributed on an "AS IS" BASIS,
//WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
//See the License for the specific language governing permissions and
//limitations under the License.
//========================================================================
package org.mortbay.util.ajax;
import java.text.DateFormatSymbols;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Locale;
import java.util.Map;
import java.util.TimeZone;
import org.mortbay.log.Log;
import org.mortbay.util.DateCache;
import org.mortbay.util.ajax.JSON.Output;
/* ------------------------------------------------------------ */
/**
* Convert a {@link Date} to JSON.
* If fromJSON is true in the constructor, the JSON generated will
* be of the form {class="java.util.Date",value="1/1/1970 12:00 GMT"}
* If fromJSON is false, then only the string value of the date is generated.
*/
public class JSONDateConvertor implements JSON.Convertor
{
private boolean _fromJSON;
DateCache _dateCache;
SimpleDateFormat _format;
public JSONDateConvertor()
{
this(false);
}
public JSONDateConvertor(boolean fromJSON)
{
this(DateCache.DEFAULT_FORMAT,TimeZone.getTimeZone("GMT"),fromJSON);
}
public JSONDateConvertor(String format,TimeZone zone,boolean fromJSON)
{
_dateCache=new DateCache(format);
_dateCache.setTimeZone(zone);
_fromJSON=fromJSON;
_format=new SimpleDateFormat(format);
_format.setTimeZone(zone);
}
public JSONDateConvertor(String format, TimeZone zone, boolean fromJSON, Locale locale)
{
_dateCache = new DateCache(format, locale);
_dateCache.setTimeZone(zone);
_fromJSON = fromJSON;
_format = new SimpleDateFormat(format, new DateFormatSymbols(locale));
_format.setTimeZone(zone);
}
public Object fromJSON(Map map)
{
if (!_fromJSON)
throw new UnsupportedOperationException();
try
{
synchronized(_format)
{
return _format.parseObject((String)map.get("value"));
}
}
catch(Exception e)
{
Log.warn(e);
}
return null;
}
public void toJSON(Object obj, Output out)
{
String date = _dateCache.format((Date)obj);
if (_fromJSON)
{
out.addClass(obj.getClass());
out.add("value",date);
}
else
{
out.add(date);
}
}
}