1 /*
2 * Copyright (c) 2014, 2018, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation. Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25
26 package com.sun.beans.introspect;
27
28 import java.lang.reflect.Method;
29 import java.lang.reflect.Modifier;
30 import java.lang.reflect.Type;
31 import java.util.ArrayList;
32 import java.util.Collections;
33 import java.util.Comparator;
34 import java.util.List;
35
36 import com.sun.beans.TypeResolver;
37 import com.sun.beans.finder.MethodFinder;
38
39 final class MethodInfo {
40 final Method method;
41 final Class<?> type;
42
43 MethodInfo(Method method, Class<?> type) {
44 this.method = method;
45 this.type = type;
46 }
47
48 MethodInfo(Method method, Type type) {
49 this.method = method;
50 this.type = resolve(method, type);
51 }
52
53 boolean isThrow(Class<?> exception) {
54 for (Class<?> type : this.method.getExceptionTypes()) {
55 if (type == exception) {
56 return true;
57 }
58 }
59 return false;
60 }
61
62 static Class<?> resolve(Method method, Type type) {
63 return TypeResolver.erase(TypeResolver.resolveInClass(method.getDeclaringClass(), type));
64 }
65
66 static List<Method> get(Class<?> type) {
67 List<Method> list = null;
68 if (type != null) {
69 boolean inaccessible = !Modifier.isPublic(type.getModifiers());
70 for (Method method : type.getMethods()) {
71 if (method.getDeclaringClass().equals(type)) {
72 if (inaccessible) {
73 try {
74 method = MethodFinder.findAccessibleMethod(method);
75 if (!method.getDeclaringClass().isInterface()) {
76 method = null; // ignore methods from superclasses
77 }
78 } catch (NoSuchMethodException exception) {
79 // commented out because of 6976577
80 // method = null; // ignore inaccessible methods
81 }
82 }
83 if (method != null) {
84 if (list == null) {
85 list = new ArrayList<>();
86 }
87 list.add(method);
88 }
89 }
90 }
91 }
92 if (list != null) {
93 list.sort(MethodOrder.instance);
94 return Collections.unmodifiableList(list);
95 }
96 return Collections.emptyList();
97 }
98
99 /**
100 * A comparator that defines a total order so that methods have the same
101 * name and identical signatures appear next to each others. The methods are
102 * sorted in such a way that methods which override each other will sit next
103 * to each other, with the overridden method last - e.g. is Integer getFoo()
104 * placed before Object getFoo().
105 **/
106 private static final class MethodOrder implements Comparator<Method> {
107
108 /*
109 * Code particularly was copied from com.sun.jmx.mbeanserver.MethodOrder
110 */
111 @Override
112 public int compare(final Method a, final Method b) {
113 int cmp = a.getName().compareTo(b.getName());
114 if (cmp != 0) {
115 return cmp;
116 }
117 final Class<?>[] aparams = a.getParameterTypes();
118 final Class<?>[] bparams = b.getParameterTypes();
119 if (aparams.length != bparams.length) {
120 return aparams.length - bparams.length;
121 }
122 for (int i = 0; i < aparams.length; ++i) {
123 final Class<?> aparam = aparams[i];
124 final Class<?> bparam = bparams[i];
125 if (aparam == bparam) {
126 continue;
127 }
128 cmp = aparam.getName().compareTo(bparam.getName());
129 if (cmp != 0) {
130 return cmp;
131 }
132 }
133 final Class<?> aret = a.getReturnType();
134 final Class<?> bret = b.getReturnType();
135 if (aret == bret) {
136 return 0;
137 }
138
139 // Super type comes last: Integer, Number, Object
140 if (aret.isAssignableFrom(bret)) {
141 return 1;
142 }
143 if (bret.isAssignableFrom(aret)) {
144 return -1;
145 }
146 return aret.getName().compareTo(bret.getName());
147 }
148
149 static final MethodOrder instance = new MethodOrder();
150 }
151 }