--- a/nashorn/src/jdk.scripting.nashorn/share/classes/jdk/internal/dynalink/beans/AccessibleMembersLookup.java Wed Jul 05 21:04:26 2017 +0200
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,263 +0,0 @@
-/*
- * 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.reflect.Method;
-import java.lang.reflect.Modifier;
-import java.util.Arrays;
-import java.util.Collection;
-import java.util.HashMap;
-import java.util.LinkedHashSet;
-import java.util.Map;
-import java.util.Set;
-
-/**
- * Utility class for discovering accessible methods and inner classes. Normally, a public member declared on a class is
- * accessible (that is, it can be invoked from anywhere). However, this is not the case if the class itself is not
- * public, or belongs to a restricted-access package. In that case, it is required to lookup a member in a publicly
- * accessible superclass or implemented interface of the class, and use it instead of the member discovered on the
- * class.
- */
-class AccessibleMembersLookup {
- private final Map<MethodSignature, Method> methods;
- private final Set<Class<?>> innerClasses;
- private final boolean instance;
-
- /**
- * Creates a mapping for all accessible methods and inner classes on a class.
- *
- * @param clazz the inspected class
- * @param instance true to inspect instance methods, false to inspect static methods.
- */
- AccessibleMembersLookup(final Class<?> clazz, final boolean instance) {
- this.methods = new HashMap<>();
- this.innerClasses = new LinkedHashSet<>();
- this.instance = instance;
- lookupAccessibleMembers(clazz);
- }
-
- /**
- * Returns an accessible method equivalent of a method.
- *
- * @param m the method whose accessible equivalent is requested.
- * @return the accessible equivalent for the method (can be the same as the passed in method), or null if there is
- * no accessible method equivalent.
- */
- Method getAccessibleMethod(final Method m) {
- return m == null ? null : methods.get(new MethodSignature(m));
- }
-
- Collection<Method> getMethods() {
- return methods.values();
- }
-
- Class<?>[] getInnerClasses() {
- return innerClasses.toArray(new Class<?>[innerClasses.size()]);
- }
-
- /**
- * A helper class that represents a method signature - name and argument types.
- */
- static final class MethodSignature {
- private final String name;
- private final Class<?>[] args;
-
- /**
- * Creates a new method signature from arbitrary data.
- *
- * @param name the name of the method this signature represents.
- * @param args the argument types of the method.
- */
- MethodSignature(final String name, final Class<?>[] args) {
- this.name = name;
- this.args = args;
- }
-
- /**
- * Creates a signature for the given method.
- *
- * @param method the method for which a signature is created.
- */
- MethodSignature(final Method method) {
- this(method.getName(), method.getParameterTypes());
- }
-
- /**
- * Compares this object to another object
- *
- * @param o the other object
- * @return true if the other object is also a method signature with the same name, same number of arguments, and
- * same types of arguments.
- */
- @Override
- public boolean equals(final Object o) {
- if(o instanceof MethodSignature) {
- final MethodSignature ms = (MethodSignature)o;
- return ms.name.equals(name) && Arrays.equals(args, ms.args);
- }
- return false;
- }
-
- /**
- * Returns a hash code, consistent with the overridden {@link #equals(Object)}.
- */
- @Override
- public int hashCode() {
- return name.hashCode() ^ Arrays.hashCode(args);
- }
-
- @Override
- public String toString() {
- final StringBuilder b = new StringBuilder();
- b.append("[MethodSignature ").append(name).append('(');
- if(args.length > 0) {
- b.append(args[0].getCanonicalName());
- for(int i = 1; i < args.length; ++i) {
- b.append(", ").append(args[i].getCanonicalName());
- }
- }
- return b.append(")]").toString();
- }
- }
-
- private void lookupAccessibleMembers(final Class<?> clazz) {
- boolean searchSuperTypes;
-
- if(!CheckRestrictedPackage.isRestrictedClass(clazz)) {
- searchSuperTypes = false;
- for(final Method method: clazz.getMethods()) {
- final boolean isStatic = Modifier.isStatic(method.getModifiers());
- if(instance != isStatic) {
- final MethodSignature sig = new MethodSignature(method);
- if(!methods.containsKey(sig)) {
- final Class<?> declaringClass = method.getDeclaringClass();
- if(declaringClass != clazz && CheckRestrictedPackage.isRestrictedClass(declaringClass)) {
- //Sometimes, the declaring class of a method (Method.getDeclaringClass())
- //retrieved through Class.getMethods() for a public class will be a
- //non-public superclass. For such a method, we need to find a method with
- //the same name and signature in a public superclass or implemented
- //interface.
- //This typically doesn't happen with classes emitted by a reasonably modern
- //javac, as it'll create synthetic delegator methods in all public
- //immediate subclasses of the non-public class. We have, however, observed
- //this in the wild with class files compiled with older javac that doesn't
- //generate the said synthetic delegators.
- searchSuperTypes = true;
- } else {
- // don't allow inherited static
- if (!isStatic || clazz == declaringClass) {
- methods.put(sig, method);
- }
- }
- }
- }
- }
- for(final Class<?> innerClass: clazz.getClasses()) {
- // Add both static and non-static classes, regardless of instance flag. StaticClassLinker will just
- // expose non-static classes with explicit constructor outer class argument.
- // NOTE: getting inner class objects through getClasses() does not resolve them, so if those classes
- // were not yet loaded, they'll only get loaded in a non-resolved state; no static initializers for
- // them will trigger just by doing this.
- innerClasses.add(innerClass);
- }
- } else {
- searchSuperTypes = true;
- }
-
- // don't need to search super types for static methods
- if(instance && searchSuperTypes) {
- // If we reach here, the class is either not public, or it is in a restricted package. Alternatively, it is
- // public, but some of its methods claim that their declaring class is non-public. We'll try superclasses
- // and implemented interfaces then looking for public ones.
- final Class<?>[] interfaces = clazz.getInterfaces();
- for(int i = 0; i < interfaces.length; i++) {
- lookupAccessibleMembers(interfaces[i]);
- }
- final Class<?> superclass = clazz.getSuperclass();
- if(superclass != null) {
- lookupAccessibleMembers(superclass);
- }
- }
- }
-}