Thu, 24 May 2018 16:39:31 +0800
Merge
aoqi@0 | 1 | /* |
aoqi@0 | 2 | * Copyright (c) 2010, 2013, Oracle and/or its affiliates. All rights reserved. |
aoqi@0 | 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
aoqi@0 | 4 | * |
aoqi@0 | 5 | * This code is free software; you can redistribute it and/or modify it |
aoqi@0 | 6 | * under the terms of the GNU General Public License version 2 only, as |
aoqi@0 | 7 | * published by the Free Software Foundation. Oracle designates this |
aoqi@0 | 8 | * particular file as subject to the "Classpath" exception as provided |
aoqi@0 | 9 | * by Oracle in the LICENSE file that accompanied this code. |
aoqi@0 | 10 | * |
aoqi@0 | 11 | * This code is distributed in the hope that it will be useful, but WITHOUT |
aoqi@0 | 12 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
aoqi@0 | 13 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
aoqi@0 | 14 | * version 2 for more details (a copy is included in the LICENSE file that |
aoqi@0 | 15 | * accompanied this code). |
aoqi@0 | 16 | * |
aoqi@0 | 17 | * You should have received a copy of the GNU General Public License version |
aoqi@0 | 18 | * 2 along with this work; if not, write to the Free Software Foundation, |
aoqi@0 | 19 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
aoqi@0 | 20 | * |
aoqi@0 | 21 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
aoqi@0 | 22 | * or visit www.oracle.com if you need additional information or have any |
aoqi@0 | 23 | * questions. |
aoqi@0 | 24 | */ |
aoqi@0 | 25 | |
aoqi@0 | 26 | /* |
aoqi@0 | 27 | * This file is available under and governed by the GNU General Public |
aoqi@0 | 28 | * License version 2 only, as published by the Free Software Foundation. |
aoqi@0 | 29 | * However, the following notice accompanied the original version of this |
aoqi@0 | 30 | * file, and Oracle licenses the original version of this file under the BSD |
aoqi@0 | 31 | * license: |
aoqi@0 | 32 | */ |
aoqi@0 | 33 | /* |
aoqi@0 | 34 | Copyright 2009-2013 Attila Szegedi |
aoqi@0 | 35 | |
aoqi@0 | 36 | Licensed under both the Apache License, Version 2.0 (the "Apache License") |
aoqi@0 | 37 | and the BSD License (the "BSD License"), with licensee being free to |
aoqi@0 | 38 | choose either of the two at their discretion. |
aoqi@0 | 39 | |
aoqi@0 | 40 | You may not use this file except in compliance with either the Apache |
aoqi@0 | 41 | License or the BSD License. |
aoqi@0 | 42 | |
aoqi@0 | 43 | If you choose to use this file in compliance with the Apache License, the |
aoqi@0 | 44 | following notice applies to you: |
aoqi@0 | 45 | |
aoqi@0 | 46 | You may obtain a copy of the Apache License at |
aoqi@0 | 47 | |
aoqi@0 | 48 | http://www.apache.org/licenses/LICENSE-2.0 |
aoqi@0 | 49 | |
aoqi@0 | 50 | Unless required by applicable law or agreed to in writing, software |
aoqi@0 | 51 | distributed under the License is distributed on an "AS IS" BASIS, |
aoqi@0 | 52 | WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or |
aoqi@0 | 53 | implied. See the License for the specific language governing |
aoqi@0 | 54 | permissions and limitations under the License. |
aoqi@0 | 55 | |
aoqi@0 | 56 | If you choose to use this file in compliance with the BSD License, the |
aoqi@0 | 57 | following notice applies to you: |
aoqi@0 | 58 | |
aoqi@0 | 59 | Redistribution and use in source and binary forms, with or without |
aoqi@0 | 60 | modification, are permitted provided that the following conditions are |
aoqi@0 | 61 | met: |
aoqi@0 | 62 | * Redistributions of source code must retain the above copyright |
aoqi@0 | 63 | notice, this list of conditions and the following disclaimer. |
aoqi@0 | 64 | * Redistributions in binary form must reproduce the above copyright |
aoqi@0 | 65 | notice, this list of conditions and the following disclaimer in the |
aoqi@0 | 66 | documentation and/or other materials provided with the distribution. |
aoqi@0 | 67 | * Neither the name of the copyright holder nor the names of |
aoqi@0 | 68 | contributors may be used to endorse or promote products derived from |
aoqi@0 | 69 | this software without specific prior written permission. |
aoqi@0 | 70 | |
aoqi@0 | 71 | THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS |
aoqi@0 | 72 | IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED |
aoqi@0 | 73 | TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A |
aoqi@0 | 74 | PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL COPYRIGHT HOLDER |
aoqi@0 | 75 | BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
aoqi@0 | 76 | CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
aoqi@0 | 77 | SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR |
aoqi@0 | 78 | BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, |
aoqi@0 | 79 | WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR |
aoqi@0 | 80 | OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF |
aoqi@0 | 81 | ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
aoqi@0 | 82 | */ |
aoqi@0 | 83 | |
aoqi@0 | 84 | package jdk.internal.dynalink.beans; |
aoqi@0 | 85 | |
aoqi@0 | 86 | import java.lang.invoke.MethodHandle; |
aoqi@0 | 87 | import java.lang.reflect.Field; |
aoqi@0 | 88 | import java.lang.reflect.Member; |
aoqi@0 | 89 | import java.lang.reflect.Method; |
aoqi@0 | 90 | import java.lang.reflect.Modifier; |
aoqi@0 | 91 | import java.util.ArrayList; |
aoqi@0 | 92 | import java.util.Collection; |
aoqi@0 | 93 | import java.util.Collections; |
aoqi@0 | 94 | import java.util.Map; |
aoqi@0 | 95 | import jdk.internal.dynalink.support.Lookup; |
aoqi@0 | 96 | |
aoqi@0 | 97 | /** |
aoqi@0 | 98 | * Base for classes that expose class field and method information to an {@link AbstractJavaLinker}. There are |
aoqi@0 | 99 | * subclasses for instance (bean) and static facet of a class. |
aoqi@0 | 100 | * @author Attila Szegedi |
aoqi@0 | 101 | */ |
aoqi@0 | 102 | abstract class FacetIntrospector { |
aoqi@0 | 103 | private final Class<?> clazz; |
aoqi@0 | 104 | private final boolean instance; |
aoqi@0 | 105 | private final boolean isRestricted; |
aoqi@0 | 106 | |
aoqi@0 | 107 | protected final AccessibleMembersLookup membersLookup; |
aoqi@0 | 108 | |
attila@962 | 109 | FacetIntrospector(final Class<?> clazz, final boolean instance) { |
aoqi@0 | 110 | this.clazz = clazz; |
aoqi@0 | 111 | this.instance = instance; |
aoqi@0 | 112 | isRestricted = CheckRestrictedPackage.isRestrictedClass(clazz); |
aoqi@0 | 113 | membersLookup = new AccessibleMembersLookup(clazz, instance); |
aoqi@0 | 114 | } |
aoqi@0 | 115 | |
aoqi@0 | 116 | /** |
aoqi@0 | 117 | * Returns getters for inner classes. |
aoqi@0 | 118 | * @return getters for inner classes. |
aoqi@0 | 119 | */ |
aoqi@0 | 120 | abstract Map<String, MethodHandle> getInnerClassGetters(); |
aoqi@0 | 121 | |
aoqi@0 | 122 | /** |
aoqi@0 | 123 | * Returns the fields for the class facet. |
aoqi@0 | 124 | * @return the fields for the class facet. |
aoqi@0 | 125 | */ |
aoqi@0 | 126 | Collection<Field> getFields() { |
aoqi@0 | 127 | if(isRestricted) { |
aoqi@0 | 128 | // NOTE: we can't do anything here. Unlike with methods in AccessibleMethodsLookup, we can't just return |
aoqi@0 | 129 | // the fields from a public superclass, because this class might define same-named fields which will shadow |
aoqi@0 | 130 | // the superclass fields, and we have no way to know if they do, since we're denied invocation of |
aoqi@0 | 131 | // getFields(). Therefore, the only correct course of action is to not expose any public fields from a class |
aoqi@0 | 132 | // defined in a restricted package. |
aoqi@0 | 133 | return Collections.emptySet(); |
aoqi@0 | 134 | } |
aoqi@0 | 135 | |
aoqi@0 | 136 | final Field[] fields = clazz.getFields(); |
aoqi@0 | 137 | final Collection<Field> cfields = new ArrayList<>(fields.length); |
attila@962 | 138 | for(final Field field: fields) { |
aoqi@0 | 139 | final boolean isStatic = Modifier.isStatic(field.getModifiers()); |
aoqi@0 | 140 | if(isStatic && clazz != field.getDeclaringClass()) { |
aoqi@0 | 141 | // ignore inherited static fields |
aoqi@0 | 142 | continue; |
aoqi@0 | 143 | } |
aoqi@0 | 144 | |
aoqi@0 | 145 | if(instance != isStatic && isAccessible(field)) { |
aoqi@0 | 146 | cfields.add(field); |
aoqi@0 | 147 | } |
aoqi@0 | 148 | } |
aoqi@0 | 149 | return cfields; |
aoqi@0 | 150 | } |
aoqi@0 | 151 | |
attila@962 | 152 | boolean isAccessible(final Member m) { |
aoqi@0 | 153 | final Class<?> declaring = m.getDeclaringClass(); |
aoqi@0 | 154 | // (declaring == clazz) is just an optimization - we're calling this only from code that operates on a |
sundar@1530 | 155 | // non-restricted class, so if the declaring class is identical to the class being inspected, then forego |
aoqi@0 | 156 | // a potentially expensive restricted-package check. |
aoqi@0 | 157 | return declaring == clazz || !CheckRestrictedPackage.isRestrictedClass(declaring); |
aoqi@0 | 158 | } |
aoqi@0 | 159 | |
aoqi@0 | 160 | /** |
aoqi@0 | 161 | * Returns all the methods in the facet. |
aoqi@0 | 162 | * @return all the methods in the facet. |
aoqi@0 | 163 | */ |
aoqi@0 | 164 | Collection<Method> getMethods() { |
aoqi@0 | 165 | return membersLookup.getMethods(); |
aoqi@0 | 166 | } |
aoqi@0 | 167 | |
aoqi@0 | 168 | |
attila@962 | 169 | MethodHandle unreflectGetter(final Field field) { |
aoqi@0 | 170 | return editMethodHandle(Lookup.PUBLIC.unreflectGetter(field)); |
aoqi@0 | 171 | } |
aoqi@0 | 172 | |
attila@962 | 173 | MethodHandle unreflectSetter(final Field field) { |
aoqi@0 | 174 | return editMethodHandle(Lookup.PUBLIC.unreflectSetter(field)); |
aoqi@0 | 175 | } |
aoqi@0 | 176 | |
aoqi@0 | 177 | /** |
aoqi@0 | 178 | * Returns an edited method handle. A facet might need to edit an unreflected method handle before it is usable with |
aoqi@0 | 179 | * the facet. By default, returns the passed method handle unchanged. The class' static facet will introduce a |
aoqi@0 | 180 | * dropArguments. |
aoqi@0 | 181 | * @param mh the method handle to edit. |
aoqi@0 | 182 | * @return the edited method handle. |
aoqi@0 | 183 | */ |
aoqi@0 | 184 | abstract MethodHandle editMethodHandle(MethodHandle mh); |
aoqi@0 | 185 | } |