NodeCreatedComparator.java

/*
 * (C) Copyright 2015 Netcentric AG.
 *
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 */
package biz.netcentric.cq.tools.actool.comparators;

import java.util.Calendar;
import java.util.Comparator;
import java.util.Date;

import javax.jcr.Node;
import javax.jcr.Property;
import javax.jcr.RepositoryException;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

public class NodeCreatedComparator implements Comparator<Node> {

    private static final String PROPERTY_JCR_CREATED = "jcr:created";

    @Override
    public int compare(Node node1, Node node2) {

        final Logger LOG = LoggerFactory.getLogger(NodeCreatedComparator.class);
        Date node1Date = null;
        Date node2Date = null;

        try {
            node1Date = getArticleDateProperty(node1);
            node2Date = getArticleDateProperty(node2);

            if (node1Date != null && node2Date != null
                    && node1Date.after(node2Date)) {
                return -1;
            } else if (node1Date != null && node2Date != null
                    && node2Date.after(node1Date)) {
                return 1;
            }

        } catch (RepositoryException e) {
            LOG.error(e.toString());
        }

        return 0;
    }

    /**
     * @param node
     *            article node
     * @return Date creation date of the article
     * @throws RepositoryException if an error occurs
     */
    public static Date getArticleDateProperty(final Node node)
            throws RepositoryException {
        Date date = null;
        Property dateProp;
        if (node.hasProperty(PROPERTY_JCR_CREATED)) {
            dateProp = node.getProperty(PROPERTY_JCR_CREATED);
            Calendar cal = dateProp.getDate();
            if (cal != null) {
                date = cal.getTime();
            }
        }
        return date;
    }
}