/**
* This file Copyright (c) 2003-2012 Magnolia International
* Ltd. (http://www.magnolia-cms.com). All rights reserved.
*
*
* This file is dual-licensed under both the Magnolia
* Network Agreement and the GNU General Public License.
* You may elect to use one or the other of these licenses.
*
* This file is distributed in the hope that it will be
* useful, but AS-IS and WITHOUT ANY WARRANTY; without even the
* implied warranty of MERCHANTABILITY or FITNESS FOR A
* PARTICULAR PURPOSE, TITLE, or NONINFRINGEMENT.
* Redistribution, except as permitted by whichever of the GPL
* or MNA you select, is prohibited.
*
* 1. For the GPL license (GPL), you can redistribute and/or
* modify this file under the terms of the GNU General
* Public License, Version 3, as published by the Free Software
* Foundation. You should have received a copy of the GNU
* General Public License, Version 3 along with this program;
* if not, write to the Free Software Foundation, Inc., 51
* Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* 2. For the Magnolia Network Agreement (MNA), this file
* and the accompanying materials are made available under the
* terms of the MNA which accompanies this distribution, and
* is available at http://www.magnolia-cms.com/mna.html
*
* Any modifications to this file must keep this entire header
* intact.
*
*/
package info.magnolia.module.delta;
import info.magnolia.module.InstallContext;
/**
* A task that delegates to another if a condition is true, or to an optional other if it is false.
*
* TODO : get descriptions from delegate + a description of the condition ?
*
* @author gjoseph
* @version $Revision: $ ($Author: $)
*/
public abstract class ConditionalDelegateTask extends AbstractTask {
private final Task ifTrue;
private final Task ifFalse;
protected ConditionalDelegateTask(String taskName, String taskDescription, Task ifTrue) {
this(taskName, taskDescription, ifTrue, null);
}
public ConditionalDelegateTask(String taskName, String taskDescription, Task ifTrue, Task ifFalse) {
super(taskName, taskDescription);
this.ifTrue = ifTrue;
this.ifFalse = ifFalse;
}
@Override
public void execute(InstallContext ctx) throws TaskExecutionException {
final Task task = condition(ctx) ? ifTrue : ifFalse;
if (task != null) {
task.execute(ctx);
}
}
protected abstract boolean condition(InstallContext installContext) throws TaskExecutionException;
}