1 /**
2 * This file Copyright (c) 2013-2017 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.i18nsystem.proxytoys;
35
36 import info.magnolia.i18nsystem.util.AnnotationUtils;
37 import info.magnolia.i18nsystem.util.GenericsUtils;
38
39 import java.lang.annotation.Annotation;
40 import java.lang.reflect.AnnotatedElement;
41 import java.lang.reflect.Method;
42 import java.lang.reflect.Type;
43
44 import com.google.common.base.Predicate;
45
46 /**
47 * A {@link Predicate} which matches methods which are "getter"s where the return value's type is annotated with the given annotation.
48 */
49 public class ReturnsAnnotatedTypeArgument implements Predicate<Method> {
50 private final Class<? extends Annotation> annotationType;
51
52 public ReturnsAnnotatedTypeArgument(Class<? extends Annotation> annotation) {
53 this.annotationType = annotation;
54 }
55
56 @Override
57 public boolean apply(Method method) {
58 // prefix is "get" and no arguments
59 if (method.getName().startsWith("get") && method.getParameterTypes().length == 0) {
60 final Type relevantType = GenericsUtils.getGenericTypeOfReturnType(method);
61
62 // TODO for some reason now we get into places where relevantType is sun.reflect.generics.reflectiveObjects.TypeVariableImpl - for the setI18nContextParent method
63 if (relevantType instanceof AnnotatedElement && AnnotationUtils.hasAnnotationOn((AnnotatedElement) relevantType, annotationType)) {
64 return true;
65 }
66 }
67 return false;
68 }
69
70 }