Jake Slack | 03928ae | 2014-05-13 18:41:56 -0700 | [diff] [blame] | 1 | // |
| 2 | // ======================================================================== |
| 3 | // Copyright (c) 1995-2014 Mort Bay Consulting Pty. Ltd. |
| 4 | // ------------------------------------------------------------------------ |
| 5 | // All rights reserved. This program and the accompanying materials |
| 6 | // are made available under the terms of the Eclipse Public License v1.0 |
| 7 | // and Apache License v2.0 which accompanies this distribution. |
| 8 | // |
| 9 | // The Eclipse Public License is available at |
| 10 | // http://www.eclipse.org/legal/epl-v10.html |
| 11 | // |
| 12 | // The Apache License v2.0 is available at |
| 13 | // http://www.opensource.org/licenses/apache2.0.php |
| 14 | // |
| 15 | // You may elect to redistribute this code under either of these licenses. |
| 16 | // ======================================================================== |
| 17 | // |
| 18 | |
| 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; |
| 32 | |
| 33 | /* ------------------------------------------------------------ */ |
| 34 | /** |
| 35 | * Convert a {@link Date} to JSON. |
| 36 | * If fromJSON is true in the constructor, the JSON generated will |
| 37 | * be of the form {class="java.util.Date",value="1/1/1970 12:00 GMT"} |
| 38 | * If fromJSON is false, then only the string value of the date is generated. |
| 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 | } |