1 /**
2 * This file Copyright (c) 2003-2018 Magnolia International
3 * Ltd. (http://www.magnolia-cms.com). All rights reserved.
4 *
5 *
6 * This file is dual-licensed under both the Magnolia
7 * Network Agreement and the GNU General Public License.
8 * You may elect to use one or the other of these licenses.
9 *
10 * This file is distributed in the hope that it will be
11 * useful, but AS-IS and WITHOUT ANY WARRANTY; without even the
12 * implied warranty of MERCHANTABILITY or FITNESS FOR A
13 * PARTICULAR PURPOSE, TITLE, or NONINFRINGEMENT.
14 * Redistribution, except as permitted by whichever of the GPL
15 * or MNA you select, is prohibited.
16 *
17 * 1. For the GPL license (GPL), you can redistribute and/or
18 * modify this file under the terms of the GNU General
19 * Public License, Version 3, as published by the Free Software
20 * Foundation. You should have received a copy of the GNU
21 * General Public License, Version 3 along with this program;
22 * if not, write to the Free Software Foundation, Inc., 51
23 * Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
24 *
25 * 2. For the Magnolia Network Agreement (MNA), this file
26 * and the accompanying materials are made available under the
27 * terms of the MNA which accompanies this distribution, and
28 * is available at http://www.magnolia-cms.com/mna.html
29 *
30 * Any modifications to this file must keep this entire header
31 * intact.
32 *
33 */
34 package info.magnolia.module.delta;
35
36 import info.magnolia.module.InstallContext;
37
38 /**
39 * A task that delegates to another if a condition is true, or to an optional other if it is false.
40 *
41 * TODO : get descriptions from delegate + a description of the condition ?
42 */
43 public abstract class ConditionalDelegateTask extends AbstractTask {
44 private final Task ifTrue;
45 private final Task ifFalse;
46
47 protected ConditionalDelegateTask(String taskName, String taskDescription, Task ifTrue) {
48 this(taskName, taskDescription, ifTrue, null);
49 }
50
51 public ConditionalDelegateTask(String taskName, String taskDescription, Taskef="../../../../info/magnolia/module/delta/Task.html#Task">Task ifTrue, Task ifFalse) {
52 super(taskName, taskDescription);
53 this.ifTrue = ifTrue;
54 this.ifFalse = ifFalse;
55 }
56
57 @Override
58 public void execute(InstallContext ctx) throws TaskExecutionException {
59 final Task task = condition(ctx) ? ifTrue : ifFalse;
60 if (task != null) {
61 task.execute(ctx);
62 }
63 }
64
65 protected abstract boolean condition(InstallContext installContext) throws TaskExecutionException;
66
67 }