01: /*
02: JSPWiki - a JSP-based WikiWiki clone.
03:
04: Copyright (C) 2001-2002 Janne Jalkanen (Janne.Jalkanen@iki.fi)
05:
06: This program is free software; you can redistribute it and/or modify
07: it under the terms of the GNU Lesser General Public License as published by
08: the Free Software Foundation; either version 2.1 of the License, or
09: (at your option) any later version.
10:
11: This program is distributed in the hope that it will be useful,
12: but WITHOUT ANY WARRANTY; without even the implied warranty of
13: MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14: GNU Lesser General Public License for more details.
15:
16: You should have received a copy of the GNU Lesser General Public License
17: along with this program; if not, write to the Free Software
18: Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
19: */
20: package com.ecyrd.jspwiki.htmltowiki;
21:
22: import java.util.LinkedHashMap;
23:
24: /**
25: * A LinkedHashMap that does not put null values into the map.
26: *
27: * @author Sebastian Baltes (sbaltes@gmx.com)
28: */
29: public class ForgetNullValuesLinkedHashMap extends LinkedHashMap {
30: private static final long serialVersionUID = 0L;
31:
32: public Object put(Object key, Object value) {
33: if (value != null) {
34: return super.put(key, value);
35: }
36:
37: return null;
38: }
39: }
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