1 /**
2 * This file Copyright (c) 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.config.registry.decoration;
35
36 import info.magnolia.config.registry.DefinitionProvider;
37 import info.magnolia.module.ModuleRegistry;
38 import info.magnolia.module.model.ModuleDefinition;
39
40 import java.util.Comparator;
41
42 import com.google.common.base.Predicate;
43 import com.google.common.collect.ComparisonChain;
44
45 /**
46 * Common {@link DefinitionDecorator}-related functions.
47 */
48 public class DefinitionDecorators {
49
50 public static <T> Predicate<DefinitionDecorator<T>> appliesTo(final DefinitionProvider<T> definitionProvider) {
51 return new Predicate<DefinitionDecorator<T>>() {
52 @Override
53 public boolean apply(DefinitionDecorator<T> decorator) {
54 return decorator.appliesTo(definitionProvider);
55 }
56 };
57 }
58
59 public static Comparator<DefinitionDecorator> moduleDependencyBasedComparator(final ModuleRegistry moduleRegistry) {
60 return new Comparator<DefinitionDecorator>() {
61 @Override
62 public int compare(DefinitionDecorator o1, DefinitionDecorator o2) {
63 final String firstModule = o1.metadata().getSourceModule();
64 final String secondModule = o2.metadata().getSourceModule();
65
66 boolean isFirstModuleRegistered = moduleRegistry.isModuleRegistered(firstModule);
67 boolean isSecondModuleRegistered = moduleRegistry.isModuleRegistered(secondModule);
68
69 if (!isFirstModuleRegistered || !isSecondModuleRegistered) {
70 // Registered module wins over non-registered, two non-registered module are considered equal
71 return ComparisonChain.start().compare(isFirstModuleRegistered, isSecondModuleRegistered).result();
72 }
73
74 final ModuleDefinition d1 = moduleRegistry.getDefinition(firstModule);
75 final ModuleDefinition d2 = moduleRegistry.getDefinition(secondModule);
76
77 return ComparisonChain.start().
78 compare(moduleRegistry.getModuleDefinitions().indexOf(d1),
79 moduleRegistry.getModuleDefinitions().indexOf(d2)).
80 result();
81 }
82 };
83 }
84
85 }