| /* |
| * 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.invoke.MethodHandles; |
| import java.lang.invoke.MethodType; |
| import java.lang.reflect.Array; |
| import java.util.Arrays; |
| import java.util.Set; |
| import jdk.dynalink.CallSiteDescriptor; |
| import jdk.dynalink.NamedOperation; |
| import jdk.dynalink.StandardNamespace; |
| import jdk.dynalink.StandardOperation; |
| import jdk.dynalink.beans.GuardedInvocationComponent.ValidationType; |
| import jdk.dynalink.linker.GuardedInvocation; |
| import jdk.dynalink.linker.LinkRequest; |
| import jdk.dynalink.linker.LinkerServices; |
| import jdk.dynalink.linker.TypeBasedGuardingDynamicLinker; |
| import jdk.dynalink.linker.support.Lookup; |
| |
| /** |
| * Provides a linker for the {@link StaticClass} objects. |
| */ |
| class StaticClassLinker implements TypeBasedGuardingDynamicLinker { |
| private static final ClassValue<SingleClassStaticsLinker> linkers = new ClassValue<SingleClassStaticsLinker>() { |
| @Override |
| protected SingleClassStaticsLinker computeValue(final Class<?> clazz) { |
| return new SingleClassStaticsLinker(clazz); |
| } |
| }; |
| |
| private static class SingleClassStaticsLinker extends AbstractJavaLinker { |
| private final DynamicMethod constructor; |
| |
| SingleClassStaticsLinker(final Class<?> clazz) { |
| super(clazz, IS_CLASS.bindTo(clazz)); |
| // Map "staticClassObject.class" to StaticClass.getRepresentedClass(). Some adventurous soul could subclass |
| // StaticClass, so we use INSTANCE_OF validation instead of EXACT_CLASS. |
| setPropertyGetter("class", GET_CLASS, ValidationType.INSTANCE_OF); |
| constructor = createConstructorMethod(clazz); |
| } |
| |
| /** |
| * Creates a dynamic method containing all overloads of a class' public constructor |
| * @param clazz the target class |
| * @return a dynamic method containing all overloads of a class' public constructor. If the class has no public |
| * constructors, returns null. |
| */ |
| private static DynamicMethod createConstructorMethod(final Class<?> clazz) { |
| if(clazz.isArray()) { |
| final MethodHandle boundArrayCtor = ARRAY_CTOR.bindTo(clazz.getComponentType()); |
| return new SimpleDynamicMethod(StaticClassIntrospector.editConstructorMethodHandle( |
| boundArrayCtor.asType(boundArrayCtor.type().changeReturnType(clazz))), clazz, "<init>"); |
| } |
| if(CheckRestrictedPackage.isRestrictedClass(clazz)) { |
| return null; |
| } |
| return createDynamicMethod(Arrays.asList(clazz.getConstructors()), clazz, "<init>"); |
| } |
| |
| @Override |
| FacetIntrospector createFacetIntrospector() { |
| return new StaticClassIntrospector(clazz); |
| } |
| |
| @Override |
| public GuardedInvocation getGuardedInvocation(final LinkRequest request, final LinkerServices linkerServices) |
| throws Exception { |
| final GuardedInvocation gi = super.getGuardedInvocation(request, linkerServices); |
| if(gi != null) { |
| return gi; |
| } |
| final CallSiteDescriptor desc = request.getCallSiteDescriptor(); |
| if(NamedOperation.getBaseOperation(desc.getOperation()) == StandardOperation.NEW && constructor != null) { |
| final MethodHandle ctorInvocation = constructor.getInvocation(desc, linkerServices); |
| if(ctorInvocation != null) { |
| return new GuardedInvocation(ctorInvocation, getClassGuard(desc.getMethodType())); |
| } |
| } |
| return null; |
| } |
| |
| @Override |
| protected GuardedInvocationComponent getGuardedInvocationComponent(final ComponentLinkRequest req) throws Exception { |
| final GuardedInvocationComponent superGic = super.getGuardedInvocationComponent(req); |
| if (superGic != null) { |
| return superGic; |
| } |
| if (!req.namespaces.isEmpty() |
| && req.namespaces.get(0) == StandardNamespace.ELEMENT |
| && (req.baseOperation == StandardOperation.GET || req.baseOperation == StandardOperation.SET)) |
| { |
| // StaticClass doesn't behave as a collection |
| return getNextComponent(req.popNamespace()); |
| } |
| return null; |
| } |
| |
| @Override |
| SingleDynamicMethod getConstructorMethod(final String signature) { |
| return constructor != null? constructor.getMethodForExactParamTypes(signature) : null; |
| } |
| } |
| |
| static Object getConstructorMethod(final Class<?> clazz, final String signature) { |
| return linkers.get(clazz).getConstructorMethod(signature); |
| } |
| |
| static Set<String> getReadableStaticPropertyNames(final Class<?> clazz) { |
| return linkers.get(clazz).getReadablePropertyNames(); |
| } |
| |
| static Set<String> getWritableStaticPropertyNames(final Class<?> clazz) { |
| return linkers.get(clazz).getWritablePropertyNames(); |
| } |
| |
| static Set<String> getStaticMethodNames(final Class<?> clazz) { |
| return linkers.get(clazz).getMethodNames(); |
| } |
| |
| @Override |
| public GuardedInvocation getGuardedInvocation(final LinkRequest request, final LinkerServices linkerServices) throws Exception { |
| final Object receiver = request.getReceiver(); |
| if(receiver instanceof StaticClass) { |
| return linkers.get(((StaticClass)receiver).getRepresentedClass()).getGuardedInvocation(request, |
| linkerServices); |
| } |
| return null; |
| } |
| |
| @Override |
| public boolean canLinkType(final Class<?> type) { |
| return type == StaticClass.class; |
| } |
| |
| /*private*/ static final MethodHandle GET_CLASS; |
| /*private*/ static final MethodHandle IS_CLASS; |
| /*private*/ static final MethodHandle ARRAY_CTOR = Lookup.PUBLIC.findStatic(Array.class, "newInstance", |
| MethodType.methodType(Object.class, Class.class, int.class)); |
| |
| static { |
| final Lookup lookup = new Lookup(MethodHandles.lookup()); |
| GET_CLASS = lookup.findVirtual(StaticClass.class, "getRepresentedClass", MethodType.methodType(Class.class)); |
| IS_CLASS = lookup.findOwnStatic("isClass", Boolean.TYPE, Class.class, Object.class); |
| } |
| |
| @SuppressWarnings("unused") |
| private static boolean isClass(final Class<?> clazz, final Object obj) { |
| return obj instanceof StaticClass && ((StaticClass)obj).getRepresentedClass() == clazz; |
| } |
| } |