net.hasor.utils.json.JSONDateConvertor Maven / Gradle / Ivy
// ========================================================================
// Copyright (c) 2004-2009 Mort Bay Consulting Pty. Ltd.
// ------------------------------------------------------------------------
// All rights reserved. This program and the accompanying materials
// are made available under the terms of the Eclipse Public License v1.0
// and Apache License v2.0 which accompanies this distribution.
// The Eclipse Public License is available at
// http://www.eclipse.org/legal/epl-v10.html
// The Apache License v2.0 is available at
// http://www.opensource.org/licenses/apache2.0.php
// You may elect to redistribute this code under either of these licenses.
// ========================================================================
package net.hasor.utils.json;
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 java.util.logging.Logger;
/* ------------------------------------------------------------ */
/**
* 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 {
protected final static Logger logger = Logger.getLogger(JSONDateConvertor.class.getName());
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) {
logger.warning(e.getMessage());
}
return null;
}
public void toJSON(Object obj, JSON.Output out) {
String date = _dateCache.format((Date) obj);
if (_fromJSON) {
out.addClass(obj.getClass());
out.add("value", date);
} else {
out.add(date);
}
}
}