| /* |
| * 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.dynalink.beans; |
| |
| import java.lang.invoke.MethodHandle; |
| import java.lang.reflect.Field; |
| import java.lang.reflect.Member; |
| import java.lang.reflect.Method; |
| import java.lang.reflect.Modifier; |
| import java.util.ArrayList; |
| import java.util.Collection; |
| import java.util.Collections; |
| import java.util.Map; |
| import jdk.dynalink.linker.support.Lookup; |
| |
| /** |
| * Base for classes that expose class field and method information to an {@link AbstractJavaLinker}. There are |
| * subclasses for instance (bean) and static facet of a class. |
| */ |
| abstract class FacetIntrospector { |
| private final Class<?> clazz; |
| private final boolean instance; |
| private final boolean isRestricted; |
| |
| protected final AccessibleMembersLookup membersLookup; |
| |
| FacetIntrospector(final Class<?> clazz, final boolean instance) { |
| this.clazz = clazz; |
| this.instance = instance; |
| isRestricted = CheckRestrictedPackage.isRestrictedClass(clazz); |
| membersLookup = new AccessibleMembersLookup(clazz, instance); |
| } |
| |
| /** |
| * Returns getters for inner classes. |
| * @return getters for inner classes. |
| */ |
| abstract Map<String, MethodHandle> getInnerClassGetters(); |
| |
| /** |
| * Returns the fields for the class facet. |
| * @return the fields for the class facet. |
| */ |
| Collection<Field> getFields() { |
| if(isRestricted) { |
| // NOTE: we can't do anything here. Unlike with methods in AccessibleMethodsLookup, we can't just return |
| // the fields from a public superclass, because this class might define same-named fields which will shadow |
| // the superclass fields, and we have no way to know if they do, since we're denied invocation of |
| // getFields(). Therefore, the only correct course of action is to not expose any public fields from a class |
| // defined in a restricted package. |
| return Collections.emptySet(); |
| } |
| |
| final Field[] fields = clazz.getFields(); |
| final Collection<Field> cfields = new ArrayList<>(fields.length); |
| for(final Field field: fields) { |
| final boolean isStatic = Modifier.isStatic(field.getModifiers()); |
| if(isStatic && clazz != field.getDeclaringClass()) { |
| // ignore inherited static fields |
| continue; |
| } |
| |
| if(instance != isStatic && isAccessible(field)) { |
| cfields.add(field); |
| } |
| } |
| return cfields; |
| } |
| |
| boolean isAccessible(final Member m) { |
| final Class<?> declaring = m.getDeclaringClass(); |
| // (declaring == clazz) is just an optimization - we're calling this only from code that operates on a |
| // non-restricted class, so if the declaring class is identical to the class being inspected, then forego |
| // a potentially expensive restricted-package check. |
| return declaring == clazz || !CheckRestrictedPackage.isRestrictedClass(declaring); |
| } |
| |
| /** |
| * Returns all the methods in the facet. |
| * @return all the methods in the facet. |
| */ |
| Collection<Method> getMethods() { |
| return membersLookup.getMethods(); |
| } |
| |
| |
| MethodHandle unreflectGetter(final Field field) { |
| return editMethodHandle(Lookup.PUBLIC.unreflectGetter(field)); |
| } |
| |
| MethodHandle unreflectSetter(final Field field) { |
| return editMethodHandle(Lookup.PUBLIC.unreflectSetter(field)); |
| } |
| |
| /** |
| * Returns an edited method handle. A facet might need to edit an unreflected method handle before it is usable with |
| * the facet. By default, returns the passed method handle unchanged. The class' static facet will introduce a |
| * dropArguments. |
| * @param mh the method handle to edit. |
| * @return the edited method handle. |
| */ |
| abstract MethodHandle editMethodHandle(MethodHandle mh); |
| } |