1 /**
2 * This file Copyright (c) 2011 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.jcr.iterator;
35
36 import info.magnolia.jcr.predicate.AbstractPredicate;
37 import info.magnolia.jcr.wrapper.NodeWrapperFactory;
38
39 import javax.jcr.Node;
40 import javax.jcr.NodeIterator;
41
42 /**
43 * NodeIterator hiding all nodes that do not pass the predicate, returned nodes can also be wrapped effectively
44 * extending the condition to the whole hierarchy.
45 *
46 * @version $Id$
47 */
48 public class FilteringNodeIterator extends FilteringRangeIterator<Node> implements NodeIterator {
49
50 private NodeWrapperFactory wrapperFactory;
51 private AbstractPredicate<Node> predicate;
52
53 public FilteringNodeIterator(NodeIterator nodeIterator, AbstractPredicate<Node> predicate) {
54 super(nodeIterator);
55 this.predicate = predicate;
56 }
57
58 public FilteringNodeIterator(NodeIterator nodeIterator, AbstractPredicate<Node> predicate, NodeWrapperFactory wrapperFactory) {
59 super(nodeIterator);
60 this.wrapperFactory = wrapperFactory;
61 this.predicate = predicate;
62 }
63
64 @Override
65 public Node next() {
66 return wrapNode(super.next());
67 }
68
69 @Override
70 public Node nextNode() {
71 return wrapNode(super.next());
72 }
73
74 protected Node wrapNode(Node node) {
75 return wrapperFactory != null ? wrapperFactory.wrapNode(node) : node;
76 }
77
78 @Override
79 protected boolean evaluate(Node node) {
80 return predicate == null || predicate.evaluate(node);
81 }
82 }