jdk8-mips64-public/nashorn: comparison src/jdk/internal/dynalink/beans/StaticClassLinker.java

--1:000000000000
+:b1a7da25b547
+/*
+* 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.invoke.MethodHandle;
+import java.lang.invoke.MethodHandles;
+import java.lang.invoke.MethodType;
+import java.lang.reflect.Array;
+import java.util.Arrays;
+import java.util.Collection;
+import jdk.internal.dynalink.CallSiteDescriptor;
+import jdk.internal.dynalink.beans.GuardedInvocationComponent.ValidationType;
+import jdk.internal.dynalink.linker.GuardedInvocation;
+import jdk.internal.dynalink.linker.LinkRequest;
+import jdk.internal.dynalink.linker.LinkerServices;
+import jdk.internal.dynalink.linker.TypeBasedGuardingDynamicLinker;
+import jdk.internal.dynalink.support.Lookup;
+/**
+* Provides a linker for the {@link StaticClass} objects.
+* @author Attila Szegedi
+*/
+class StaticClassLinker implements TypeBasedGuardingDynamicLinker {
+private static final ClassValue<SingleClassStaticsLinker> linkers = new ClassValue<SingleClassStaticsLinker>() {
+@Override
+protected SingleClassStaticsLinker computeValue(Class<?> clazz) {
+return new SingleClassStaticsLinker(clazz);
+}
+};
+private static class SingleClassStaticsLinker extends AbstractJavaLinker {
+private final DynamicMethod constructor;
+SingleClassStaticsLinker(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(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(LinkRequest request, LinkerServices linkerServices)
+throws Exception {
+final GuardedInvocation gi = super.getGuardedInvocation(request, linkerServices);
+if(gi != null) {
+return gi;
+}
+final CallSiteDescriptor desc = request.getCallSiteDescriptor();
+final String op = desc.getNameToken(CallSiteDescriptor.OPERATOR);
+if("new" == op && constructor != null) {
+final MethodHandle ctorInvocation = constructor.getInvocation(desc, linkerServices);
+if(ctorInvocation != null) {
+return new GuardedInvocation(ctorInvocation, getClassGuard(desc.getMethodType()));
+}
+}
+return null;
+}
+}
+static Collection<String> getReadableStaticPropertyNames(Class<?> clazz) {
+return linkers.get(clazz).getReadablePropertyNames();
+}
+static Collection<String> getWritableStaticPropertyNames(Class<?> clazz) {
+return linkers.get(clazz).getWritablePropertyNames();
+}
+static Collection<String> getStaticMethodNames(Class<?> clazz) {
+return linkers.get(clazz).getMethodNames();
+}
+@Override
+public GuardedInvocation getGuardedInvocation(LinkRequest request, 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(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(Class<?> clazz, Object obj) {
+return obj instanceof StaticClass && ((StaticClass)obj).getRepresentedClass() == clazz;
+}
+}

Mercurial > jdk8-mips64-public > nashorn / file comparison

comparison: src/jdk/internal/dynalink/beans/StaticClassLinker.java

src/jdk/internal/dynalink/beans/StaticClassLinker.java