Sat, 07 Nov 2020 10:30:02 +0800
Added tag mips-jdk8u275-b01 for changeset 7c756d901f9a
1 /*
2 * Copyright (c) 2010, 2013, 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 */
26 /*
27 * This file is available under and governed by the GNU General Public
28 * License version 2 only, as published by the Free Software Foundation.
29 * However, the following notice accompanied the original version of this
30 * file, and Oracle licenses the original version of this file under the BSD
31 * license:
32 */
33 /*
34 Copyright 2009-2013 Attila Szegedi
36 Licensed under both the Apache License, Version 2.0 (the "Apache License")
37 and the BSD License (the "BSD License"), with licensee being free to
38 choose either of the two at their discretion.
40 You may not use this file except in compliance with either the Apache
41 License or the BSD License.
43 If you choose to use this file in compliance with the Apache License, the
44 following notice applies to you:
46 You may obtain a copy of the Apache License at
48 http://www.apache.org/licenses/LICENSE-2.0
50 Unless required by applicable law or agreed to in writing, software
51 distributed under the License is distributed on an "AS IS" BASIS,
52 WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
53 implied. See the License for the specific language governing
54 permissions and limitations under the License.
56 If you choose to use this file in compliance with the BSD License, the
57 following notice applies to you:
59 Redistribution and use in source and binary forms, with or without
60 modification, are permitted provided that the following conditions are
61 met:
62 * Redistributions of source code must retain the above copyright
63 notice, this list of conditions and the following disclaimer.
64 * Redistributions in binary form must reproduce the above copyright
65 notice, this list of conditions and the following disclaimer in the
66 documentation and/or other materials provided with the distribution.
67 * Neither the name of the copyright holder nor the names of
68 contributors may be used to endorse or promote products derived from
69 this software without specific prior written permission.
71 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
72 IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
73 TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
74 PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL COPYRIGHT HOLDER
75 BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
76 CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
77 SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
78 BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
79 WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
80 OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
81 ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
82 */
84 package jdk.internal.dynalink.beans;
86 import java.lang.invoke.MethodType;
87 import java.util.LinkedList;
88 import java.util.List;
89 import jdk.internal.dynalink.support.TypeUtilities;
91 /**
92 * Represents overloaded methods applicable to a specific call site signature.
93 *
94 * @author Attila Szegedi
95 */
96 class ApplicableOverloadedMethods {
97 private final List<SingleDynamicMethod> methods;
98 private final boolean varArgs;
100 /**
101 * Creates a new ApplicableOverloadedMethods instance
102 *
103 * @param methods a list of all overloaded methods with the same name for a class.
104 * @param callSiteType the type of the call site
105 * @param test applicability test. One of {@link #APPLICABLE_BY_SUBTYPING},
106 * {@link #APPLICABLE_BY_METHOD_INVOCATION_CONVERSION}, or {@link #APPLICABLE_BY_VARIABLE_ARITY}.
107 */
108 ApplicableOverloadedMethods(final List<SingleDynamicMethod> methods, final MethodType callSiteType,
109 final ApplicabilityTest test) {
110 this.methods = new LinkedList<>();
111 for(final SingleDynamicMethod m: methods) {
112 if(test.isApplicable(callSiteType, m)) {
113 this.methods.add(m);
114 }
115 }
116 varArgs = test == APPLICABLE_BY_VARIABLE_ARITY;
117 }
119 /**
120 * Retrieves all the methods this object holds.
121 *
122 * @return list of all methods.
123 */
124 List<SingleDynamicMethod> getMethods() {
125 return methods;
126 }
128 /**
129 * Returns a list of all methods in this objects that are maximally specific.
130 *
131 * @return a list of maximally specific methods.
132 */
133 List<SingleDynamicMethod> findMaximallySpecificMethods() {
134 return MaximallySpecific.getMaximallySpecificMethods(methods, varArgs);
135 }
137 abstract static class ApplicabilityTest {
138 abstract boolean isApplicable(MethodType callSiteType, SingleDynamicMethod method);
139 }
141 /**
142 * Implements the applicability-by-subtyping test from JLS 15.12.2.2.
143 */
144 static final ApplicabilityTest APPLICABLE_BY_SUBTYPING = new ApplicabilityTest() {
145 @Override
146 boolean isApplicable(final MethodType callSiteType, final SingleDynamicMethod method) {
147 final MethodType methodType = method.getMethodType();
148 final int methodArity = methodType.parameterCount();
149 if(methodArity != callSiteType.parameterCount()) {
150 return false;
151 }
152 // 0th arg is receiver; it doesn't matter for overload
153 // resolution.
154 for(int i = 1; i < methodArity; ++i) {
155 if(!TypeUtilities.isSubtype(callSiteType.parameterType(i), methodType.parameterType(i))) {
156 return false;
157 }
158 }
159 return true;
160 }
161 };
163 /**
164 * Implements the applicability-by-method-invocation-conversion test from JLS 15.12.2.3.
165 */
166 static final ApplicabilityTest APPLICABLE_BY_METHOD_INVOCATION_CONVERSION = new ApplicabilityTest() {
167 @Override
168 boolean isApplicable(final MethodType callSiteType, final SingleDynamicMethod method) {
169 final MethodType methodType = method.getMethodType();
170 final int methodArity = methodType.parameterCount();
171 if(methodArity != callSiteType.parameterCount()) {
172 return false;
173 }
174 // 0th arg is receiver; it doesn't matter for overload
175 // resolution.
176 for(int i = 1; i < methodArity; ++i) {
177 if(!TypeUtilities.isMethodInvocationConvertible(callSiteType.parameterType(i),
178 methodType.parameterType(i))) {
179 return false;
180 }
181 }
182 return true;
183 }
184 };
186 /**
187 * Implements the applicability-by-variable-arity test from JLS 15.12.2.4.
188 */
189 static final ApplicabilityTest APPLICABLE_BY_VARIABLE_ARITY = new ApplicabilityTest() {
190 @Override
191 boolean isApplicable(final MethodType callSiteType, final SingleDynamicMethod method) {
192 if(!method.isVarArgs()) {
193 return false;
194 }
195 final MethodType methodType = method.getMethodType();
196 final int methodArity = methodType.parameterCount();
197 final int fixArity = methodArity - 1;
198 final int callSiteArity = callSiteType.parameterCount();
199 if(fixArity > callSiteArity) {
200 return false;
201 }
202 // 0th arg is receiver; it doesn't matter for overload
203 // resolution.
204 for(int i = 1; i < fixArity; ++i) {
205 if(!TypeUtilities.isMethodInvocationConvertible(callSiteType.parameterType(i),
206 methodType.parameterType(i))) {
207 return false;
208 }
209 }
210 final Class<?> varArgType = methodType.parameterType(fixArity).getComponentType();
211 for(int i = fixArity; i < callSiteArity; ++i) {
212 if(!TypeUtilities.isMethodInvocationConvertible(callSiteType.parameterType(i), varArgType)) {
213 return false;
214 }
215 }
216 return true;
217 }
218 };
219 }