Mon, 18 Feb 2013 20:41:12 +0530
8008387: Improve code coverage tests for JSObjectLinker and NashornBottomLinker
Reviewed-by: lagergren, jlaskey, hannesw
attila@90 | 1 | /* |
attila@90 | 2 | * Copyright (c) 2010, 2013, Oracle and/or its affiliates. All rights reserved. |
attila@90 | 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
attila@90 | 4 | * |
attila@90 | 5 | * This code is free software; you can redistribute it and/or modify it |
attila@90 | 6 | * under the terms of the GNU General Public License version 2 only, as |
attila@90 | 7 | * published by the Free Software Foundation. Oracle designates this |
attila@90 | 8 | * particular file as subject to the "Classpath" exception as provided |
attila@90 | 9 | * by Oracle in the LICENSE file that accompanied this code. |
attila@90 | 10 | * |
attila@90 | 11 | * This code is distributed in the hope that it will be useful, but WITHOUT |
attila@90 | 12 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
attila@90 | 13 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
attila@90 | 14 | * version 2 for more details (a copy is included in the LICENSE file that |
attila@90 | 15 | * accompanied this code). |
attila@90 | 16 | * |
attila@90 | 17 | * You should have received a copy of the GNU General Public License version |
attila@90 | 18 | * 2 along with this work; if not, write to the Free Software Foundation, |
attila@90 | 19 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
attila@90 | 20 | * |
attila@90 | 21 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
attila@90 | 22 | * or visit www.oracle.com if you need additional information or have any |
attila@90 | 23 | * questions. |
attila@90 | 24 | */ |
attila@90 | 25 | |
attila@90 | 26 | /* |
attila@90 | 27 | * This file is available under and governed by the GNU General Public |
attila@90 | 28 | * License version 2 only, as published by the Free Software Foundation. |
attila@90 | 29 | * However, the following notice accompanied the original version of this |
attila@90 | 30 | * file, and Oracle licenses the original version of this file under the BSD |
attila@90 | 31 | * license: |
attila@90 | 32 | */ |
attila@90 | 33 | /* |
attila@90 | 34 | Copyright 2009-2013 Attila Szegedi |
attila@90 | 35 | |
attila@90 | 36 | Licensed under both the Apache License, Version 2.0 (the "Apache License") |
attila@90 | 37 | and the BSD License (the "BSD License"), with licensee being free to |
attila@90 | 38 | choose either of the two at their discretion. |
attila@90 | 39 | |
attila@90 | 40 | You may not use this file except in compliance with either the Apache |
attila@90 | 41 | License or the BSD License. |
attila@90 | 42 | |
attila@90 | 43 | If you choose to use this file in compliance with the Apache License, the |
attila@90 | 44 | following notice applies to you: |
attila@90 | 45 | |
attila@90 | 46 | You may obtain a copy of the Apache License at |
attila@90 | 47 | |
attila@90 | 48 | http://www.apache.org/licenses/LICENSE-2.0 |
attila@90 | 49 | |
attila@90 | 50 | Unless required by applicable law or agreed to in writing, software |
attila@90 | 51 | distributed under the License is distributed on an "AS IS" BASIS, |
attila@90 | 52 | WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or |
attila@90 | 53 | implied. See the License for the specific language governing |
attila@90 | 54 | permissions and limitations under the License. |
attila@90 | 55 | |
attila@90 | 56 | If you choose to use this file in compliance with the BSD License, the |
attila@90 | 57 | following notice applies to you: |
attila@90 | 58 | |
attila@90 | 59 | Redistribution and use in source and binary forms, with or without |
attila@90 | 60 | modification, are permitted provided that the following conditions are |
attila@90 | 61 | met: |
attila@90 | 62 | * Redistributions of source code must retain the above copyright |
attila@90 | 63 | notice, this list of conditions and the following disclaimer. |
attila@90 | 64 | * Redistributions in binary form must reproduce the above copyright |
attila@90 | 65 | notice, this list of conditions and the following disclaimer in the |
attila@90 | 66 | documentation and/or other materials provided with the distribution. |
attila@90 | 67 | * Neither the name of the copyright holder nor the names of |
attila@90 | 68 | contributors may be used to endorse or promote products derived from |
attila@90 | 69 | this software without specific prior written permission. |
attila@90 | 70 | |
attila@90 | 71 | THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS |
attila@90 | 72 | IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED |
attila@90 | 73 | TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A |
attila@90 | 74 | PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL COPYRIGHT HOLDER |
attila@90 | 75 | BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
attila@90 | 76 | CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
attila@90 | 77 | SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR |
attila@90 | 78 | BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, |
attila@90 | 79 | WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR |
attila@90 | 80 | OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF |
attila@90 | 81 | ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
attila@90 | 82 | */ |
attila@90 | 83 | |
attila@90 | 84 | package jdk.internal.dynalink.beans; |
attila@90 | 85 | |
attila@90 | 86 | import java.beans.BeanInfo; |
attila@90 | 87 | import java.lang.invoke.MethodHandles; |
attila@90 | 88 | import jdk.internal.dynalink.CallSiteDescriptor; |
attila@90 | 89 | import jdk.internal.dynalink.DynamicLinkerFactory; |
attila@90 | 90 | import jdk.internal.dynalink.linker.GuardedInvocation; |
attila@90 | 91 | import jdk.internal.dynalink.linker.GuardingDynamicLinker; |
attila@90 | 92 | import jdk.internal.dynalink.linker.LinkRequest; |
attila@90 | 93 | import jdk.internal.dynalink.linker.LinkerServices; |
attila@90 | 94 | import jdk.internal.dynalink.linker.TypeBasedGuardingDynamicLinker; |
attila@90 | 95 | |
attila@90 | 96 | /** |
attila@90 | 97 | * A linker for POJOs. Normally used as the ultimate fallback linker by the {@link DynamicLinkerFactory} so it is given |
attila@90 | 98 | * the chance to link calls to all objects that no other language runtime recognizes. Specifically, this linker will: |
attila@90 | 99 | * <ul> |
attila@90 | 100 | * <li>expose all public methods of form {@code setXxx()}, {@code getXxx()}, and {@code isXxx()} as property setters and |
attila@90 | 101 | * getters for {@code dyn:setProp} and {@code dyn:getProp} operations;</li> |
attila@90 | 102 | * <li>expose all property getters and setters declared by the class' {@link BeanInfo};</li> |
attila@90 | 103 | * <li>expose all public methods and methods declared by the class' {@link BeanInfo} for invocation through |
attila@90 | 104 | * {@code dyn:callMethod} operation;</li> |
attila@90 | 105 | * <li>expose all public methods and methods declared by the class' {@link BeanInfo} for retrieval for |
attila@90 | 106 | * {@code dyn:getMethod} operation; the methods thus retrieved can then be invoked using {@code dyn:call};</li> |
attila@90 | 107 | * <li>expose all public fields as properties, unless there are getters or setters for the properties of the same name;</li> |
attila@90 | 108 | * <li>expose {@code dyn:getLength}, {@code dyn:getElem} and {@code dyn:setElem} on native Java arrays, as well as |
attila@90 | 109 | * {@link java.util.List} and {@link java.util.Map} objects; ({@code dyn:getLength} works on any |
attila@90 | 110 | * {@link java.util.Collection});</li> |
attila@90 | 111 | * <li>expose a virtual property named {@code length} on Java arrays;</li> |
attila@90 | 112 | * <li>expose {@code dyn:new} on instances of {@link StaticClass} as calls to constructors, including those static class |
attila@90 | 113 | * objects that represent Java arrays (their constructors take a single {@code int} parameter representing the length of |
attila@90 | 114 | * the array to create);</li> |
attila@90 | 115 | * <li>expose static methods, fields, and properties of classes in a similar manner to how instance method, fields, and |
attila@90 | 116 | * properties are exposed, on {@link StaticClass} objects.</li> |
attila@90 | 117 | * <li>expose a virtual property named {@code static} on instances of {@link java.lang.Class} to access their |
attila@90 | 118 | * {@link StaticClass}.</li> |
attila@90 | 119 | * </ul> |
attila@90 | 120 | * <p><strong>Overloaded method resolution</strong> is performed automatically for property setters, methods, and |
attila@90 | 121 | * constructors. Additionally, manual overloaded method selection is supported by having a call site specify a name for |
attila@90 | 122 | * a method that contains an explicit signature, i.e. {@code dyn:getMethod:parseInt(String,int)}. You can use |
attila@90 | 123 | * non-qualified class names in such signatures regardless of those classes' packages, they will match any class with |
attila@90 | 124 | * the same non-qualified name. You only have to use a fully qualified class name in case non-qualified class names |
attila@90 | 125 | * would cause selection ambiguity (that is extremely rare).</p> |
attila@90 | 126 | * <p><strong>Variable argument invocation</strong> is handled for both methods and constructors.</p> |
attila@90 | 127 | * <p>Currently, only public fields and methods are supported. Any Lookup objects passed in the |
attila@90 | 128 | * {@link LinkRequest}s are ignored and {@link MethodHandles#publicLookup()} is used instead.</p> |
attila@90 | 129 | * |
attila@90 | 130 | * @author Attila Szegedi |
attila@90 | 131 | */ |
attila@90 | 132 | public class BeansLinker implements GuardingDynamicLinker { |
attila@90 | 133 | private static final ClassValue<TypeBasedGuardingDynamicLinker> linkers = new ClassValue<TypeBasedGuardingDynamicLinker>() { |
attila@90 | 134 | @Override |
attila@90 | 135 | protected TypeBasedGuardingDynamicLinker computeValue(Class<?> clazz) { |
attila@90 | 136 | // If ClassValue.put() were public, we could just pre-populate with these known mappings... |
attila@90 | 137 | return |
attila@90 | 138 | clazz == Class.class ? new ClassLinker() : |
attila@90 | 139 | clazz == StaticClass.class ? new StaticClassLinker() : |
attila@90 | 140 | DynamicMethod.class.isAssignableFrom(clazz) ? new DynamicMethodLinker() : |
attila@90 | 141 | new BeanLinker(clazz); |
attila@90 | 142 | } |
attila@90 | 143 | }; |
attila@90 | 144 | |
attila@90 | 145 | /** |
attila@90 | 146 | * Creates a new POJO linker. |
attila@90 | 147 | */ |
attila@90 | 148 | public BeansLinker() { |
attila@90 | 149 | } |
attila@90 | 150 | |
attila@90 | 151 | /** |
attila@90 | 152 | * Returns a bean linker for a particular single class. Useful when you need to override or extend the behavior of |
attila@90 | 153 | * linking for some classes in your language runtime's linker, but still want to delegate to the default behavior in |
attila@90 | 154 | * some cases. |
attila@90 | 155 | * @param clazz the class |
attila@90 | 156 | * @return a bean linker for that class |
attila@90 | 157 | */ |
attila@90 | 158 | public static TypeBasedGuardingDynamicLinker getLinkerForClass(Class<?> clazz) { |
attila@90 | 159 | return linkers.get(clazz); |
attila@90 | 160 | } |
attila@90 | 161 | |
sundar@102 | 162 | /* |
sundar@102 | 163 | * Returns true if the object is a Dynalink Java dynamic method. |
sundar@102 | 164 | * |
sundar@102 | 165 | * @param obj the object we want to test for being a dynamic method |
sundar@102 | 166 | * @return true if it is a dynamic method, false otherwise. |
sundar@102 | 167 | */ |
sundar@102 | 168 | public static boolean isDynamicMethod(final Object obj) { |
sundar@102 | 169 | return obj instanceof DynamicMethod; |
sundar@102 | 170 | } |
sundar@102 | 171 | |
attila@90 | 172 | @Override |
attila@90 | 173 | public GuardedInvocation getGuardedInvocation(LinkRequest request, final LinkerServices linkerServices) |
attila@90 | 174 | throws Exception { |
attila@90 | 175 | final CallSiteDescriptor callSiteDescriptor = request.getCallSiteDescriptor(); |
attila@90 | 176 | final int l = callSiteDescriptor.getNameTokenCount(); |
attila@90 | 177 | // All names conforming to the dynalang MOP should have at least two tokens, the first one being "dyn" |
attila@90 | 178 | if(l < 2 || "dyn" != callSiteDescriptor.getNameToken(CallSiteDescriptor.SCHEME)) { |
attila@90 | 179 | return null; |
attila@90 | 180 | } |
attila@90 | 181 | |
attila@90 | 182 | final Object receiver = request.getReceiver(); |
attila@90 | 183 | if(receiver == null) { |
attila@90 | 184 | // Can't operate on null |
attila@90 | 185 | return null; |
attila@90 | 186 | } |
attila@90 | 187 | return getLinkerForClass(receiver.getClass()).getGuardedInvocation(request, linkerServices); |
attila@90 | 188 | } |
attila@101 | 189 | } |