attila@90: /* attila@90: * Copyright (c) 2010, 2013, Oracle and/or its affiliates. All rights reserved. attila@90: * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. attila@90: * attila@90: * This code is free software; you can redistribute it and/or modify it attila@90: * under the terms of the GNU General Public License version 2 only, as attila@90: * published by the Free Software Foundation. Oracle designates this attila@90: * particular file as subject to the "Classpath" exception as provided attila@90: * by Oracle in the LICENSE file that accompanied this code. attila@90: * attila@90: * This code is distributed in the hope that it will be useful, but WITHOUT attila@90: * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or attila@90: * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License attila@90: * version 2 for more details (a copy is included in the LICENSE file that attila@90: * accompanied this code). attila@90: * attila@90: * You should have received a copy of the GNU General Public License version attila@90: * 2 along with this work; if not, write to the Free Software Foundation, attila@90: * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. attila@90: * attila@90: * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA attila@90: * or visit www.oracle.com if you need additional information or have any attila@90: * questions. attila@90: */ attila@90: attila@90: /* attila@90: * This file is available under and governed by the GNU General Public attila@90: * License version 2 only, as published by the Free Software Foundation. attila@90: * However, the following notice accompanied the original version of this attila@90: * file, and Oracle licenses the original version of this file under the BSD attila@90: * license: attila@90: */ attila@90: /* attila@90: Copyright 2009-2013 Attila Szegedi attila@90: attila@90: Licensed under both the Apache License, Version 2.0 (the "Apache License") attila@90: and the BSD License (the "BSD License"), with licensee being free to attila@90: choose either of the two at their discretion. attila@90: attila@90: You may not use this file except in compliance with either the Apache attila@90: License or the BSD License. attila@90: attila@90: If you choose to use this file in compliance with the Apache License, the attila@90: following notice applies to you: attila@90: attila@90: You may obtain a copy of the Apache License at attila@90: attila@90: http://www.apache.org/licenses/LICENSE-2.0 attila@90: attila@90: Unless required by applicable law or agreed to in writing, software attila@90: distributed under the License is distributed on an "AS IS" BASIS, attila@90: WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or attila@90: implied. See the License for the specific language governing attila@90: permissions and limitations under the License. attila@90: attila@90: If you choose to use this file in compliance with the BSD License, the attila@90: following notice applies to you: attila@90: attila@90: Redistribution and use in source and binary forms, with or without attila@90: modification, are permitted provided that the following conditions are attila@90: met: attila@90: * Redistributions of source code must retain the above copyright attila@90: notice, this list of conditions and the following disclaimer. attila@90: * Redistributions in binary form must reproduce the above copyright attila@90: notice, this list of conditions and the following disclaimer in the attila@90: documentation and/or other materials provided with the distribution. attila@90: * Neither the name of the copyright holder nor the names of attila@90: contributors may be used to endorse or promote products derived from attila@90: this software without specific prior written permission. attila@90: attila@90: THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS attila@90: IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED attila@90: TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A attila@90: PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL COPYRIGHT HOLDER attila@90: BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR attila@90: CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF attila@90: SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR attila@90: BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, attila@90: WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR attila@90: OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF attila@90: ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. attila@90: */ attila@90: attila@90: package jdk.internal.dynalink.beans; attila@90: attila@90: import java.lang.invoke.MethodHandle; attila@90: import java.lang.invoke.MethodType; attila@90: import java.util.LinkedList; attila@90: import java.util.List; attila@90: import jdk.internal.dynalink.linker.LinkerServices; attila@90: import jdk.internal.dynalink.support.Guards; attila@90: import jdk.internal.dynalink.support.TypeUtilities; attila@90: attila@90: attila@90: /** attila@90: * attila@90: * @author Attila Szegedi attila@90: */ attila@90: final class ClassString { attila@90: private final Class[] classes; attila@90: private int hashCode; attila@90: attila@90: ClassString(Class[] classes) { attila@90: this.classes = classes; attila@90: } attila@90: attila@90: ClassString(MethodType type) { attila@90: this(type.parameterArray()); attila@90: } attila@90: attila@90: Class[] getClasses() { attila@90: return classes; attila@90: } attila@90: attila@90: @Override attila@90: public boolean equals(Object other) { attila@90: if(!(other instanceof ClassString)) { attila@90: return false; attila@90: } attila@90: final Class[] otherClasses = ((ClassString)other).classes; attila@90: if(otherClasses.length != classes.length) { attila@90: return false; attila@90: } attila@90: for(int i = 0; i < otherClasses.length; ++i) { attila@90: if(otherClasses[i] != classes[i]) { attila@90: return false; attila@90: } attila@90: } attila@90: return true; attila@90: } attila@90: attila@90: @Override attila@90: public int hashCode() { attila@90: if(hashCode == 0) { attila@90: int h = 0; attila@90: for(int i = 0; i < classes.length; ++i) { attila@90: h ^= classes[i].hashCode(); attila@90: } attila@90: hashCode = h; attila@90: } attila@90: return hashCode; attila@90: } attila@90: attila@90: boolean isVisibleFrom(final ClassLoader classLoader) { attila@90: for(int i = 0; i < classes.length; ++i) { attila@90: if(!Guards.canReferenceDirectly(classLoader, classes[i].getClassLoader())) { attila@90: return false; attila@90: } attila@90: } attila@90: return true; attila@90: } attila@90: attila@90: List getMaximallySpecifics(List methods, LinkerServices linkerServices, boolean varArg) { attila@90: return MaximallySpecific.getMaximallySpecificMethods(getApplicables(methods, linkerServices, varArg), varArg, attila@90: classes, linkerServices); attila@90: } attila@90: attila@90: /** attila@90: * Returns all methods that are applicable to actual parameter classes represented by this ClassString object. attila@90: */ attila@90: LinkedList getApplicables(List methods, LinkerServices linkerServices, boolean varArg) { attila@90: final LinkedList list = new LinkedList<>(); attila@90: for(final MethodHandle member: methods) { attila@90: if(isApplicable(member, linkerServices, varArg)) { attila@90: list.add(member); attila@90: } attila@90: } attila@90: return list; attila@90: } attila@90: attila@90: /** attila@90: * Returns true if the supplied method is applicable to actual parameter classes represented by this ClassString attila@90: * object. attila@90: * attila@90: */ attila@90: private boolean isApplicable(MethodHandle method, LinkerServices linkerServices, boolean varArg) { attila@90: final Class[] formalTypes = method.type().parameterArray(); attila@90: final int cl = classes.length; attila@90: final int fl = formalTypes.length - (varArg ? 1 : 0); attila@90: if(varArg) { attila@90: if(cl < fl) { attila@90: return false; attila@90: } attila@90: } else { attila@90: if(cl != fl) { attila@90: return false; attila@90: } attila@90: } attila@90: // Starting from 1 as we ignore the receiver type attila@90: for(int i = 1; i < fl; ++i) { attila@90: if(!canConvert(linkerServices, classes[i], formalTypes[i])) { attila@90: return false; attila@90: } attila@90: } attila@90: if(varArg) { attila@90: final Class varArgType = formalTypes[fl].getComponentType(); attila@90: for(int i = fl; i < cl; ++i) { attila@90: if(!canConvert(linkerServices, classes[i], varArgType)) { attila@90: return false; attila@90: } attila@90: } attila@90: } attila@90: return true; attila@90: } attila@90: attila@90: private static boolean canConvert(LinkerServices ls, Class from, Class to) { attila@90: return ls == null ? TypeUtilities.isMethodInvocationConvertible(from, to) : ls.canConvert(from, to); attila@90: } attila@90: }