| /* |
| * Copyright (c) 2010, 2013, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| /* |
| * This file is available under and governed by the GNU General Public |
| * License version 2 only, as published by the Free Software Foundation. |
| * However, the following notice accompanied the original version of this |
| * file, and Oracle licenses the original version of this file under the BSD |
| * license: |
| */ |
| /* |
| Copyright 2009-2013 Attila Szegedi |
| |
| Licensed under both the Apache License, Version 2.0 (the "Apache License") |
| and the BSD License (the "BSD License"), with licensee being free to |
| choose either of the two at their discretion. |
| |
| You may not use this file except in compliance with either the Apache |
| License or the BSD License. |
| |
| If you choose to use this file in compliance with the Apache License, the |
| following notice applies to you: |
| |
| You may obtain a copy of the Apache License at |
| |
| http://www.apache.org/licenses/LICENSE-2.0 |
| |
| Unless required by applicable law or agreed to in writing, software |
| distributed under the License is distributed on an "AS IS" BASIS, |
| WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or |
| implied. See the License for the specific language governing |
| permissions and limitations under the License. |
| |
| If you choose to use this file in compliance with the BSD License, the |
| following notice applies to you: |
| |
| Redistribution and use in source and binary forms, with or without |
| modification, are permitted provided that the following conditions are |
| met: |
| * Redistributions of source code must retain the above copyright |
| notice, this list of conditions and the following disclaimer. |
| * Redistributions in binary form must reproduce the above copyright |
| notice, this list of conditions and the following disclaimer in the |
| documentation and/or other materials provided with the distribution. |
| * Neither the name of the copyright holder nor the names of |
| contributors may be used to endorse or promote products derived from |
| this software without specific prior written permission. |
| |
| THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS |
| IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED |
| TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A |
| PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL COPYRIGHT HOLDER |
| BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
| SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR |
| BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, |
| WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR |
| OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF |
| ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| package jdk.internal.dynalink.beans; |
| |
| import java.lang.invoke.MethodType; |
| import java.util.LinkedList; |
| import java.util.List; |
| import jdk.internal.dynalink.support.TypeUtilities; |
| |
| /** |
| * Represents overloaded methods applicable to a specific call site signature. |
| * |
| * @author Attila Szegedi |
| */ |
| class ApplicableOverloadedMethods { |
| private final List<SingleDynamicMethod> methods; |
| private final boolean varArgs; |
| |
| /** |
| * Creates a new ApplicableOverloadedMethods instance |
| * |
| * @param methods a list of all overloaded methods with the same name for a class. |
| * @param callSiteType the type of the call site |
| * @param test applicability test. One of {@link #APPLICABLE_BY_SUBTYPING}, |
| * {@link #APPLICABLE_BY_METHOD_INVOCATION_CONVERSION}, or {@link #APPLICABLE_BY_VARIABLE_ARITY}. |
| */ |
| ApplicableOverloadedMethods(final List<SingleDynamicMethod> methods, final MethodType callSiteType, |
| final ApplicabilityTest test) { |
| this.methods = new LinkedList<>(); |
| for(final SingleDynamicMethod m: methods) { |
| if(test.isApplicable(callSiteType, m)) { |
| this.methods.add(m); |
| } |
| } |
| varArgs = test == APPLICABLE_BY_VARIABLE_ARITY; |
| } |
| |
| /** |
| * Retrieves all the methods this object holds. |
| * |
| * @return list of all methods. |
| */ |
| List<SingleDynamicMethod> getMethods() { |
| return methods; |
| } |
| |
| /** |
| * Returns a list of all methods in this objects that are maximally specific. |
| * |
| * @return a list of maximally specific methods. |
| */ |
| List<SingleDynamicMethod> findMaximallySpecificMethods() { |
| return MaximallySpecific.getMaximallySpecificMethods(methods, varArgs); |
| } |
| |
| abstract static class ApplicabilityTest { |
| abstract boolean isApplicable(MethodType callSiteType, SingleDynamicMethod method); |
| } |
| |
| /** |
| * Implements the applicability-by-subtyping test from JLS 15.12.2.2. |
| */ |
| static final ApplicabilityTest APPLICABLE_BY_SUBTYPING = new ApplicabilityTest() { |
| @Override |
| boolean isApplicable(final MethodType callSiteType, final SingleDynamicMethod method) { |
| final MethodType methodType = method.getMethodType(); |
| final int methodArity = methodType.parameterCount(); |
| if(methodArity != callSiteType.parameterCount()) { |
| return false; |
| } |
| // 0th arg is receiver; it doesn't matter for overload |
| // resolution. |
| for(int i = 1; i < methodArity; ++i) { |
| if(!TypeUtilities.isSubtype(callSiteType.parameterType(i), methodType.parameterType(i))) { |
| return false; |
| } |
| } |
| return true; |
| } |
| }; |
| |
| /** |
| * Implements the applicability-by-method-invocation-conversion test from JLS 15.12.2.3. |
| */ |
| static final ApplicabilityTest APPLICABLE_BY_METHOD_INVOCATION_CONVERSION = new ApplicabilityTest() { |
| @Override |
| boolean isApplicable(final MethodType callSiteType, final SingleDynamicMethod method) { |
| final MethodType methodType = method.getMethodType(); |
| final int methodArity = methodType.parameterCount(); |
| if(methodArity != callSiteType.parameterCount()) { |
| return false; |
| } |
| // 0th arg is receiver; it doesn't matter for overload |
| // resolution. |
| for(int i = 1; i < methodArity; ++i) { |
| if(!TypeUtilities.isMethodInvocationConvertible(callSiteType.parameterType(i), |
| methodType.parameterType(i))) { |
| return false; |
| } |
| } |
| return true; |
| } |
| }; |
| |
| /** |
| * Implements the applicability-by-variable-arity test from JLS 15.12.2.4. |
| */ |
| static final ApplicabilityTest APPLICABLE_BY_VARIABLE_ARITY = new ApplicabilityTest() { |
| @Override |
| boolean isApplicable(final MethodType callSiteType, final SingleDynamicMethod method) { |
| if(!method.isVarArgs()) { |
| return false; |
| } |
| final MethodType methodType = method.getMethodType(); |
| final int methodArity = methodType.parameterCount(); |
| final int fixArity = methodArity - 1; |
| final int callSiteArity = callSiteType.parameterCount(); |
| if(fixArity > callSiteArity) { |
| return false; |
| } |
| // 0th arg is receiver; it doesn't matter for overload |
| // resolution. |
| for(int i = 1; i < fixArity; ++i) { |
| if(!TypeUtilities.isMethodInvocationConvertible(callSiteType.parameterType(i), |
| methodType.parameterType(i))) { |
| return false; |
| } |
| } |
| final Class<?> varArgType = methodType.parameterType(fixArity).getComponentType(); |
| for(int i = fixArity; i < callSiteArity; ++i) { |
| if(!TypeUtilities.isMethodInvocationConvertible(callSiteType.parameterType(i), varArgType)) { |
| return false; |
| } |
| } |
| return true; |
| } |
| }; |
| } |