1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/src/jdk/internal/dynalink/beans/FacetIntrospector.java Thu Feb 14 13:22:26 2013 +0100
1.3 @@ -0,0 +1,188 @@
1.4 +/*
1.5 + * Copyright (c) 2010, 2013, Oracle and/or its affiliates. All rights reserved.
1.6 + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
1.7 + *
1.8 + * This code is free software; you can redistribute it and/or modify it
1.9 + * under the terms of the GNU General Public License version 2 only, as
1.10 + * published by the Free Software Foundation. Oracle designates this
1.11 + * particular file as subject to the "Classpath" exception as provided
1.12 + * by Oracle in the LICENSE file that accompanied this code.
1.13 + *
1.14 + * This code is distributed in the hope that it will be useful, but WITHOUT
1.15 + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
1.16 + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
1.17 + * version 2 for more details (a copy is included in the LICENSE file that
1.18 + * accompanied this code).
1.19 + *
1.20 + * You should have received a copy of the GNU General Public License version
1.21 + * 2 along with this work; if not, write to the Free Software Foundation,
1.22 + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
1.23 + *
1.24 + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
1.25 + * or visit www.oracle.com if you need additional information or have any
1.26 + * questions.
1.27 + */
1.28 +
1.29 +/*
1.30 + * This file is available under and governed by the GNU General Public
1.31 + * License version 2 only, as published by the Free Software Foundation.
1.32 + * However, the following notice accompanied the original version of this
1.33 + * file, and Oracle licenses the original version of this file under the BSD
1.34 + * license:
1.35 + */
1.36 +/*
1.37 + Copyright 2009-2013 Attila Szegedi
1.38 +
1.39 + Licensed under both the Apache License, Version 2.0 (the "Apache License")
1.40 + and the BSD License (the "BSD License"), with licensee being free to
1.41 + choose either of the two at their discretion.
1.42 +
1.43 + You may not use this file except in compliance with either the Apache
1.44 + License or the BSD License.
1.45 +
1.46 + If you choose to use this file in compliance with the Apache License, the
1.47 + following notice applies to you:
1.48 +
1.49 + You may obtain a copy of the Apache License at
1.50 +
1.51 + http://www.apache.org/licenses/LICENSE-2.0
1.52 +
1.53 + Unless required by applicable law or agreed to in writing, software
1.54 + distributed under the License is distributed on an "AS IS" BASIS,
1.55 + WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
1.56 + implied. See the License for the specific language governing
1.57 + permissions and limitations under the License.
1.58 +
1.59 + If you choose to use this file in compliance with the BSD License, the
1.60 + following notice applies to you:
1.61 +
1.62 + Redistribution and use in source and binary forms, with or without
1.63 + modification, are permitted provided that the following conditions are
1.64 + met:
1.65 + * Redistributions of source code must retain the above copyright
1.66 + notice, this list of conditions and the following disclaimer.
1.67 + * Redistributions in binary form must reproduce the above copyright
1.68 + notice, this list of conditions and the following disclaimer in the
1.69 + documentation and/or other materials provided with the distribution.
1.70 + * Neither the name of the copyright holder nor the names of
1.71 + contributors may be used to endorse or promote products derived from
1.72 + this software without specific prior written permission.
1.73 +
1.74 + THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
1.75 + IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
1.76 + TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
1.77 + PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL COPYRIGHT HOLDER
1.78 + BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
1.79 + CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
1.80 + SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
1.81 + BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
1.82 + WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
1.83 + OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
1.84 + ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
1.85 +*/
1.86 +
1.87 +package jdk.internal.dynalink.beans;
1.88 +
1.89 +import java.lang.invoke.MethodHandle;
1.90 +import java.lang.reflect.Field;
1.91 +import java.lang.reflect.Member;
1.92 +import java.lang.reflect.Method;
1.93 +import java.lang.reflect.Modifier;
1.94 +import java.util.ArrayList;
1.95 +import java.util.Collection;
1.96 +import java.util.Collections;
1.97 +import java.util.Map;
1.98 +import jdk.internal.dynalink.support.Lookup;
1.99 +
1.100 +
1.101 +/**
1.102 + * Base for classes that expose class field and method information to an {@link AbstractJavaLinker}. There are
1.103 + * subclasses for instance (bean) and static facet of a class.
1.104 + * @author Attila Szegedi
1.105 + */
1.106 +abstract class FacetIntrospector implements AutoCloseable {
1.107 + private final Class<?> clazz;
1.108 + private final boolean instance;
1.109 + private final boolean isRestricted;
1.110 +
1.111 + protected final AccessibleMembersLookup membersLookup;
1.112 +
1.113 + FacetIntrospector(Class<?> clazz, boolean instance) {
1.114 + this.clazz = clazz;
1.115 + this.instance = instance;
1.116 + isRestricted = CheckRestrictedPackage.isRestrictedClass(clazz);
1.117 + membersLookup = new AccessibleMembersLookup(clazz, instance);
1.118 + }
1.119 +
1.120 + /**
1.121 + * Returns getters for inner classes.
1.122 + * @return getters for inner classes.
1.123 + */
1.124 + abstract Map<String, MethodHandle> getInnerClassGetters();
1.125 +
1.126 + /**
1.127 + * Returns the fields for the class facet.
1.128 + * @return the fields for the class facet.
1.129 + */
1.130 + Collection<Field> getFields() {
1.131 + if(isRestricted) {
1.132 + // NOTE: we can't do anything here. Unlike with methods in AccessibleMethodsLookup, we can't just return
1.133 + // the fields from a public superclass, because this class might define same-named fields which will shadow
1.134 + // the superclass fields, and we have no way to know if they do, since we're denied invocation of
1.135 + // getFields(). Therefore, the only correct course of action is to not expose any public fields from a class
1.136 + // defined in a restricted package.
1.137 + return Collections.emptySet();
1.138 + }
1.139 +
1.140 + final Field[] fields = clazz.getFields();
1.141 + final Collection<Field> cfields = new ArrayList<>(fields.length);
1.142 + for(Field field: fields) {
1.143 + if(instance != Modifier.isStatic(field.getModifiers()) && isAccessible(field)) {
1.144 + cfields.add(field);
1.145 + }
1.146 + }
1.147 + return cfields;
1.148 + }
1.149 +
1.150 + boolean isAccessible(Member m) {
1.151 + final Class<?> declaring = m.getDeclaringClass();
1.152 + // (declaring == clazz) is just an optimization - we're calling this only from code that operates on a
1.153 + // non-restriced class, so if the declaring class is identical to the class being inspected, then forego
1.154 + // a potentially expensive restricted-package check.
1.155 + return declaring == clazz || !CheckRestrictedPackage.isRestrictedClass(declaring);
1.156 + }
1.157 +
1.158 + /**
1.159 + * Returns all the methods in the facet.
1.160 + * @return all the methods in the facet.
1.161 + */
1.162 + Collection<Method> getMethods() {
1.163 + return membersLookup.getMethods();
1.164 + }
1.165 +
1.166 +
1.167 + MethodHandle unreflectGetter(Field field) {
1.168 + return editMethodHandle(Lookup.PUBLIC.unreflectGetter(field));
1.169 + }
1.170 +
1.171 + MethodHandle unreflectSetter(Field field) {
1.172 + return editMethodHandle(Lookup.PUBLIC.unreflectSetter(field));
1.173 + }
1.174 +
1.175 + MethodHandle unreflect(Method method) {
1.176 + return editMethodHandle(Lookup.PUBLIC.unreflect(method));
1.177 + }
1.178 +
1.179 + /**
1.180 + * Returns an edited method handle. A facet might need to edit an unreflected method handle before it is usable with
1.181 + * the facet. By default, returns the passed method handle unchanged. The class' static facet will introduce a
1.182 + * dropArguments.
1.183 + * @param mh the method handle to edit.
1.184 + * @return the edited method handle.
1.185 + */
1.186 + abstract MethodHandle editMethodHandle(MethodHandle mh);
1.187 +
1.188 + @Override
1.189 + public void close() {
1.190 + }
1.191 +}
1.192 \ No newline at end of file
