NotificationIterator.java
/*
* Copyright (C) 2003-2015 eXo Platform SAS.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package org.exoplatform.commons.notification.impl.service.storage;
import java.util.Collections;
import java.util.Iterator;
import java.util.LinkedList;
import java.util.List;
import javax.jcr.Node;
import javax.jcr.NodeIterator;
import javax.jcr.RepositoryException;
import org.exoplatform.commons.api.notification.model.WebNotificationFilter;
import org.exoplatform.commons.notification.impl.AbstractService;
import org.exoplatform.services.log.ExoLogger;
import org.exoplatform.services.log.Log;
/**
* Defines the NotificationInterator for Notification message nodes
*
* Created by The eXo Platform SAS
* Author : eXoPlatform
* exo@exoplatform.com
* Jan 26, 2015
*/
public class NotificationIterator implements Iterator<Node> {
private static final Log LOG = ExoLogger.getLogger(NotificationIterator.class);
private int offset;
private int limit;
private NodeIterator parentNotifIter;
private NodeIterator notifIter;
private WebNotificationFilter filter;
public NotificationIterator(WebNotificationFilter filter, Node parentNode, int offset, int limit) {
this.offset = offset;
this.limit = limit;
this.filter = filter;
try {
this.parentNotifIter = AbstractService.getNodeIteratorOrderDESC(parentNode);
if (this.parentNotifIter.hasNext()) {
this.notifIter = AbstractService.getNodeIteratorOrderDESC(this.parentNotifIter.nextNode());
}
} catch (RepositoryException e) {
this.parentNotifIter = null;
}
}
public NodeIterator getCurrentDateIterator() throws Exception {
while (! this.notifIter.hasNext() && this.parentNotifIter.hasNext()) {
this.notifIter = AbstractService.getNodeIteratorOrderDESC(this.parentNotifIter.nextNode());
}
return this.notifIter;
}
@Override
public boolean hasNext() {
try {
return getCurrentDateIterator().hasNext();
} catch (Exception e) {
return false;
}
}
@Override
public Node next() {
return this.notifIter.nextNode();
}
@Override
public void remove() {
}
public List<Node> nodes() {
if (this.parentNotifIter == null) {
return Collections.emptyList();
}
List<Node> nodes = new LinkedList<Node>();
//
while (hasNext() && this.limit > 0) {
Node node = next();
try {
if (this.filter.isOnPopover() && !node.getProperty(AbstractService.NTF_SHOW_POPOVER).getBoolean()) {
continue;
}
} catch (Exception e) {
LOG.debug("Failed to get value of property ntf:showPopover ", e);
}
if (this.offset > 0) {
this.offset--;
continue;
}
nodes.add(node);
this.limit--;
}
return nodes;
}
}