01: /*
02: * (c) Copyright 2006 by Volker Bergmann. All rights reserved.
03: *
04: * Redistribution and use in source and binary forms, with or without
05: * modification, is permitted under the terms of the
06: * GNU General Public License.
07: *
08: * For redistributing this software or a derivative work under a license other
09: * than the GPL-compatible Free Software License as defined by the Free
10: * Software Foundation or approved by OSI, you must first obtain a commercial
11: * license to this software product from Volker Bergmann.
12: *
13: * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
14: * WITHOUT A WARRANTY OF ANY KIND. ALL EXPRESS OR IMPLIED CONDITIONS,
15: * REPRESENTATIONS AND WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF
16: * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT, ARE
17: * HEREBY EXCLUDED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
18: * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
19: * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
20: * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
21: * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
22: * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
23: * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
24: * POSSIBILITY OF SUCH DAMAGE.
25: */
26:
27: package org.databene.platform.db.model;
28:
29: import java.util.List;
30: import java.util.Arrays;
31:
32: /**
33: * Represents a unique constraint on one or the combination of several columns of one table.<br/>
34: * <br/>
35: * Created: 06.01.2007 09:00:37
36: */
37: public class DBUniqueConstraint extends DBConstraint {
38:
39: private List<DBColumn> columns;
40:
41: /**
42: * @param name the constraint name - it may be null
43: * @param columns the DBColumns to which the constraint is applied
44: */
45: public DBUniqueConstraint(String name, DBColumn... columns) {
46: super (name);
47: this .columns = Arrays.asList(columns);
48: }
49:
50: public DBTable getOwner() {
51: return columns.get(0).getTable();
52: }
53:
54: public DBColumn[] getColumns() {
55: DBColumn[] array = new DBColumn[columns.size()];
56: return columns.toArray(array);
57: }
58:
59: public void addColumn(DBColumn column) {
60: columns.add(column);
61: }
62:
63: public void removeColumn(DBColumn column) {
64: columns.remove(column);
65: }
66: }
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