1 /*
2 * Copyright (c) 2014, 2016, 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 com.sun.beans.TypeResolver;
29 import com.sun.beans.finder.MethodFinder;
30
31 import java.lang.reflect.Method;
32 import java.lang.reflect.Modifier;
33 import java.lang.reflect.Type;
34 import java.util.ArrayList;
35 import java.util.Arrays;
36 import java.util.Collections;
37 import java.util.Comparator;
38 import java.util.List;
39
40 final class MethodInfo {
41 final Method method;
42 final Class<?> type;
43
44 MethodInfo(Method method, Class<?> type) {
45 this.method = method;
46 this.type = type;
47 }
48
49 MethodInfo(Method method, Type type) {
50 this.method = method;
51 this.type = resolve(method, type);
52 }
53
54 boolean isThrow(Class<?> exception) {
55 for (Class<?> type : this.method.getExceptionTypes()) {
56 if (type == exception) {
57 return true;
58 }
59 }
60 return false;
61 }
62
63 static Class<?> resolve(Method method, Type type) {
64 return TypeResolver.erase(TypeResolver.resolveInClass(method.getDeclaringClass(), type));
65 }
66
67 static List<Method> get(Class<?> type) {
68 List<Method> list = null;
69 if (type != null) {
70 boolean inaccessible = !Modifier.isPublic(type.getModifiers());
71 for (Method method : type.getMethods()) {
72 if (method.getDeclaringClass().equals(type)) {
73 if (inaccessible) {
74 try {
75 method = MethodFinder.findAccessibleMethod(method);
76 if (!method.getDeclaringClass().isInterface()) {
77 method = null; // ignore methods from superclasses
78 }
79 } catch (NoSuchMethodException exception) {
80 // commented out because of 6976577
81 // method = null; // ignore inaccessible methods
82 }
83 }
84 if (method != null) {
85 if (list == null) {
86 list = new ArrayList<>();
87 }
88 list.add(method);
89 }
90 }
91 }
92 }
93 if (list != null) {
94 list.sort(MethodOrder.instance);
95 return Collections.unmodifiableList(list);
96 }
97 return Collections.emptyList();
98 }
99
100 /**
101 * A comparator that defines a total order so that methods have the same
102 * name and identical signatures appear next to each others. The methods are
103 * sorted in such a way that methods which override each other will sit next
104 * to each other, with the overridden method last - e.g. is Integer getFoo()
105 * placed before Object getFoo().
106 **/
107 private static final class MethodOrder implements Comparator<Method> {
108
109 /*
110 * Code particularly was copied from com.sun.jmx.mbeanserver.MethodOrder
111 */
112 @Override
113 public int compare(final Method a, final Method b) {
114 int cmp = a.getName().compareTo(b.getName());
115 if (cmp != 0) {
116 return cmp;
117 }
118 final Class<?>[] aparams = a.getParameterTypes();
119 final Class<?>[] bparams = b.getParameterTypes();
120 if (aparams.length != bparams.length) {
121 return aparams.length - bparams.length;
122 }
123 for (int i = 0; i < aparams.length; ++i) {
124 final Class<?> aparam = aparams[i];
125 final Class<?> bparam = bparams[i];
126 if (aparam == bparam) {
127 continue;
128 }
129 cmp = aparam.getName().compareTo(bparam.getName());
130 if (cmp != 0) {
131 return cmp;
132 }
133 }
134 final Class<?> aret = a.getReturnType();
135 final Class<?> bret = b.getReturnType();
136 if (aret == bret) {
137 return 0;
138 }
139
140 // Super type comes last: Integer, Number, Object
141 if (aret.isAssignableFrom(bret)) {
142 return 1;
143 }
144 return -1;
145 }
146
147 static final MethodOrder instance = new MethodOrder();
148 }
149 }