1 /**
2 * This file Copyright (c) 2015-2016 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.resourceloader.layered;
35
36 import info.magnolia.resourceloader.Resource;
37 import info.magnolia.resourceloader.ResourceOrigin;
38 import info.magnolia.resourceloader.ResourceVisitor;
39
40 import org.slf4j.Logger;
41 import org.slf4j.LoggerFactory;
42
43 /**
44 * A {@link ResourceVisitor} that relays the call to another visitor by re-fetching the Resource from a given {@link LayeredResourceOrigin}.
45 */
46 class RelayerResourceVisitor implements ResourceVisitor {
47
48 private final static Logger log = LoggerFactory.getLogger(RelayerResourceVisitor.class);
49
50 private final LayeredResourceOrigin layeredOrigin;
51 private final ResourceVisitor visitor;
52
53 public RelayerResourceVisitor(LayeredResourceOrigin layeredOrigin, ResourceVisitor visitor) {
54 this.layeredOrigin = layeredOrigin;
55 this.visitor = visitor;
56 }
57
58 @Override
59 public boolean visitDirectory(Resource resource) {
60 final LayeredResource layered = layeredOrigin.getByPath(resource.getPath());
61 return visitor.visitDirectory(layered);
62 }
63
64 @Override
65 public void visitFile(Resource resource) {
66 try {
67 final LayeredResource layered = layeredOrigin.getByPath(resource.getPath());
68 visitor.visitFile(layered);
69 } catch (ResourceOrigin.ResourceNotFoundException e) {
70 // LayeredResource might be deleted, hence, we should be catching this exception here.
71 log.debug("LayeredResource could not be found with path {}", resource.getPath(), e);
72 }
73 }
74 }