/**
 * 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;
import info.magnolia.cms.core.HierarchyManager;
import info.magnolia.cms.core.Content;

import javax.jcr.RepositoryException;

/**
 * A task that delegates to another if a checkNode is true, or to an optional other if it is false.
 * @author gjoseph
 * @version $Revision: $ ($Author: $)
 */
public abstract class NodeCheckDelegateTask extends ConditionalDelegateTask {
    protected final String workspaceName;
    protected final String nodePath;
    protected final String propertyName;

    public NodeCheckDelegateTask(String taskName, String taskDescription, String workspaceName, String nodePath, String propertyName, Task ifTrue, Task ifFalse) {
        super(taskName, taskDescription, ifTrue, ifFalse);
        this.workspaceName = workspaceName;
        this.nodePath = nodePath;
        this.propertyName = propertyName;
    }

    @Override
    protected boolean condition(InstallContext ctx) throws TaskExecutionException {
        final HierarchyManager hm = ctx.getHierarchyManager(workspaceName);
        if (!hm.isExist(nodePath)) {
            return false;
        }

        try {
            final Content node = hm.getContent(nodePath);
            return checkNode(node, ctx);
        } catch (RepositoryException e) {
            throw new TaskExecutionException("Can't check for property " + propertyName + " in " + nodePath + ".", e);
        }
    }

    protected abstract boolean checkNode(Content node, InstallContext ctx) throws RepositoryException, TaskExecutionException;
}