01: /*
02: * Copyright (c) 1998-2008 Caucho Technology -- all rights reserved
03: *
04: * This file is part of Resin(R) Open Source
05: *
06: * Each copy or derived work must preserve the copyright notice and this
07: * notice unmodified.
08: *
09: * Resin Open Source is free software; you can redistribute it and/or modify
10: * it under the terms of the GNU General Public License as published by
11: * the Free Software Foundation; either version 2 of the License, or
12: * (at your option) any later version.
13: *
14: * Resin Open Source is distributed in the hope that it will be useful,
15: * but WITHOUT ANY WARRANTY; without even the implied warranty of
16: * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, or any warranty
17: * of NON-INFRINGEMENT. See the GNU General Public License for more
18: * details.
19: *
20: * You should have received a copy of the GNU General Public License
21: * along with Resin Open Source; if not, write to the
22: * Free Software Foundation, Inc.
23: * 59 Temple Place, Suite 330
24: * Boston, MA 02111-1307 USA
25: *
26: * @author Scott Ferguson
27: */
28:
29: package com.caucho.amber.table;
30:
31: import java.util.Comparator;
32:
33: /**
34: * Sorts columns fields.
35: */
36: public class ColumnCompare implements Comparator<Column> {
37: /**
38: * Compares the fields.
39: */
40: public int compare(Column a, Column b) {
41: if (a.isPrimaryKey() && !b.isPrimaryKey())
42: return -1;
43: else if (b.isPrimaryKey() && !a.isPrimaryKey())
44: return 1;
45: else
46: return a.getName().compareTo(b.getName());
47: }
48: }
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