1 /**
2 * This file Copyright (c) 2018 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.ui.databinding;
35
36 import info.magnolia.config.NamedDefinition;
37 import info.magnolia.jcr.util.NodeTypes;
38 import info.magnolia.jcr.util.NodeUtil;
39 import info.magnolia.ui.framework.databinding.ItemProviderStrategy;
40 import info.magnolia.ui.form.FormDefinition;
41
42 import java.util.Optional;
43
44 import javax.inject.Inject;
45 import javax.jcr.Node;
46 import javax.jcr.RepositoryException;
47
48 import org.slf4j.Logger;
49 import org.slf4j.LoggerFactory;
50
51 /**
52 * Resolves child JCR node from the parent. Suitable for the sub-form only,
53 * since it relies on the parent {@link ItemProviderStrategy item provider strategy}
54 * to be available in the context.
55 * <strong>NOTE:</strong> currently sub-node name is resolved from the {@link FormDefinition form definition},
56 * which might change in the future (<- TODO check).
57 */
58 public class FetchJcrSubNode implements ItemProviderStrategy<Node> {
59
60 private static final Logger log = LoggerFactory.getLogger(FetchJcrSubNode.class);
61
62 private final ItemProviderStrategy<Node> parentNodeReader;
63 private final FetchJcrSubNodeDefinition definition;
64 private final NamedDefinition formDefinition;
65
66 @Inject
67 public FetchJcrSubNode(
68 ItemProviderStrategy<Node> parentNodeProvider,
69 FetchJcrSubNodeDefinition definition,
70 NamedDefinition formDefinition) {
71 this.parentNodeReader = parentNodeProvider;
72 this.definition = definition;
73 this.formDefinition = formDefinition;
74 }
75
76 @Override
77 public Optional<Node> read() {
78 return parentNodeReader.read().map(parentNode -> {
79 try {
80 return NodeUtil.createPath(parentNode, getSubNodeName(), resolveTargetNodeType());
81 } catch (RepositoryException e) {
82 log.warn("Unable to read from parent node {}", parentNode, e);
83 return null;
84 }
85 });
86 }
87
88 protected String getSubNodeName() {
89 return formDefinition.getName();
90 }
91
92 private String resolveTargetNodeType() {
93 return Optional.ofNullable(definition.getNodeType()).orElse(NodeTypes.ContentNode.NAME);
94 }
95 }