01: package net.sourceforge.squirrel_sql.fw.datasetviewer.cellcomponent;
02:
03: /*
04: * Copyright (C) 2001-2002 Colin Bell
05: * colbell@users.sourceforge.net
06: *
07: * This library is free software; you can redistribute it and/or
08: * modify it under the terms of the GNU Lesser General Public
09: * License as published by the Free Software Foundation; either
10: * version 2.1 of the License, or (at your option) any later version.
11: *
12: * This library is distributed in the hope that it will be useful,
13: * but WITHOUT ANY WARRANTY; without even the implied warranty of
14: * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15: * Lesser General Public License for more details.
16: *
17: * You should have received a copy of the GNU Lesser General Public
18: * License along with this library; if not, write to the Free Software
19: * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
20: */
21:
22: /**
23: * Default renderer.
24: *
25: * @author <A HREF="mailto:colbell@users.sourceforge.net">Colin Bell</A>
26: */
27: public class DefaultColumnRenderer {
28: /** Singleton instance of this class. */
29: private static final DefaultColumnRenderer s_instance = new DefaultColumnRenderer();
30:
31: /**
32: * Default ctor.
33: */
34: protected DefaultColumnRenderer() {
35: super ();
36: }
37:
38: /**
39: * Retrieve the singleton instance of this class.
40: */
41: public static DefaultColumnRenderer getInstance() {
42: return s_instance;
43: }
44:
45: /**
46: * Return the rendered version of the passed object. If the passed object
47: * is not <TT>null</TT> then <TT>toString() is called on it else
48: * "<null>" is returned.
49: *
50: *
51: * @param obj Object to be rendered.
52: * @param idx The column number being rendered.
53: *
54: * @return The rendered object.
55: */
56: public Object renderObject(Object obj) {
57: if (obj != null) {
58: return obj.toString();
59: }
60: return "<null>";
61: }
62: }
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