Thu, 14 Feb 2013 13:22:26 +0100
8008085: Integrate Dynalink source code into Nashorn codebase
Reviewed-by: jlaskey, lagergren, sundar
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.lang.invoke.MethodHandle; |
attila@90 | 87 | import jdk.internal.dynalink.linker.GuardedInvocation; |
attila@90 | 88 | |
attila@90 | 89 | |
attila@90 | 90 | /** |
attila@90 | 91 | * Represents one component for a GuardedInvocation of a potentially composite operation of an |
attila@90 | 92 | * {@link AbstractJavaLinker}. In addition to holding a guarded invocation, it holds semantic information about its |
attila@90 | 93 | * guard. All guards produced in the AbstractJavaLinker are either "Class.isInstance()" or "getClass() == clazz" |
attila@90 | 94 | * expressions. This allows choosing the most restrictive guard as the guard for the composition of two components. |
attila@90 | 95 | * @author Attila Szegedi |
attila@90 | 96 | * @version $Id: $ |
attila@90 | 97 | */ |
attila@90 | 98 | class GuardedInvocationComponent { |
attila@90 | 99 | enum ValidationType { |
attila@90 | 100 | NONE, // No guard; the operation can be linked unconditionally (quite rare); least strict. |
attila@90 | 101 | INSTANCE_OF, // "validatorClass.isInstance(obj)" guard |
attila@90 | 102 | EXACT_CLASS, // "obj.getClass() == validatorClass" guard; most strict. |
attila@90 | 103 | IS_ARRAY, // "obj.getClass().isArray()" |
attila@90 | 104 | } |
attila@90 | 105 | |
attila@90 | 106 | private final GuardedInvocation guardedInvocation; |
attila@90 | 107 | private final Validator validator; |
attila@90 | 108 | |
attila@90 | 109 | GuardedInvocationComponent(MethodHandle invocation) { |
attila@90 | 110 | this(invocation, null, ValidationType.NONE); |
attila@90 | 111 | } |
attila@90 | 112 | |
attila@90 | 113 | GuardedInvocationComponent(MethodHandle invocation, MethodHandle guard, ValidationType validationType) { |
attila@90 | 114 | this(invocation, guard, null, validationType); |
attila@90 | 115 | } |
attila@90 | 116 | |
attila@90 | 117 | GuardedInvocationComponent(MethodHandle invocation, MethodHandle guard, Class<?> validatorClass, |
attila@90 | 118 | ValidationType validationType) { |
attila@90 | 119 | this(invocation, guard, new Validator(validatorClass, validationType)); |
attila@90 | 120 | } |
attila@90 | 121 | |
attila@90 | 122 | GuardedInvocationComponent(GuardedInvocation guardedInvocation, Class<?> validatorClass, |
attila@90 | 123 | ValidationType validationType) { |
attila@90 | 124 | this(guardedInvocation, new Validator(validatorClass, validationType)); |
attila@90 | 125 | } |
attila@90 | 126 | |
attila@90 | 127 | GuardedInvocationComponent replaceInvocation(MethodHandle newInvocation) { |
attila@90 | 128 | return replaceInvocation(newInvocation, guardedInvocation.getGuard()); |
attila@90 | 129 | } |
attila@90 | 130 | |
attila@90 | 131 | GuardedInvocationComponent replaceInvocation(MethodHandle newInvocation, MethodHandle newGuard) { |
attila@90 | 132 | return new GuardedInvocationComponent(guardedInvocation.replaceMethods(newInvocation, |
attila@90 | 133 | newGuard), validator); |
attila@90 | 134 | } |
attila@90 | 135 | |
attila@90 | 136 | private GuardedInvocationComponent(MethodHandle invocation, MethodHandle guard, Validator validator) { |
attila@90 | 137 | this(new GuardedInvocation(invocation, guard), validator); |
attila@90 | 138 | } |
attila@90 | 139 | |
attila@90 | 140 | private GuardedInvocationComponent(GuardedInvocation guardedInvocation, Validator validator) { |
attila@90 | 141 | this.guardedInvocation = guardedInvocation; |
attila@90 | 142 | this.validator = validator; |
attila@90 | 143 | } |
attila@90 | 144 | |
attila@90 | 145 | GuardedInvocation getGuardedInvocation() { |
attila@90 | 146 | return guardedInvocation; |
attila@90 | 147 | } |
attila@90 | 148 | |
attila@90 | 149 | Class<?> getValidatorClass() { |
attila@90 | 150 | return validator.validatorClass; |
attila@90 | 151 | } |
attila@90 | 152 | |
attila@90 | 153 | ValidationType getValidationType() { |
attila@90 | 154 | return validator.validationType; |
attila@90 | 155 | } |
attila@90 | 156 | |
attila@90 | 157 | GuardedInvocationComponent compose(MethodHandle compositeInvocation, MethodHandle otherGuard, |
attila@90 | 158 | Class<?> otherValidatorClass, ValidationType otherValidationType) { |
attila@90 | 159 | final Validator compositeValidator = validator.compose(new Validator(otherValidatorClass, otherValidationType)); |
attila@90 | 160 | final MethodHandle compositeGuard = compositeValidator == validator ? guardedInvocation.getGuard() : otherGuard; |
attila@90 | 161 | return new GuardedInvocationComponent(compositeInvocation, compositeGuard, compositeValidator); |
attila@90 | 162 | } |
attila@90 | 163 | |
attila@90 | 164 | private static class Validator { |
attila@90 | 165 | /*private*/ final Class<?> validatorClass; |
attila@90 | 166 | /*private*/ final ValidationType validationType; |
attila@90 | 167 | |
attila@90 | 168 | Validator(Class<?> validatorClass, ValidationType validationType) { |
attila@90 | 169 | this.validatorClass = validatorClass; |
attila@90 | 170 | this.validationType = validationType; |
attila@90 | 171 | } |
attila@90 | 172 | |
attila@90 | 173 | Validator compose(Validator other) { |
attila@90 | 174 | if(other.validationType == ValidationType.NONE) { |
attila@90 | 175 | return this; |
attila@90 | 176 | } |
attila@90 | 177 | switch(validationType) { |
attila@90 | 178 | case NONE: |
attila@90 | 179 | return other; |
attila@90 | 180 | case INSTANCE_OF: |
attila@90 | 181 | switch(other.validationType) { |
attila@90 | 182 | case INSTANCE_OF: |
attila@90 | 183 | if(isAssignableFrom(other)) { |
attila@90 | 184 | return other; |
attila@90 | 185 | } else if(other.isAssignableFrom(this)) { |
attila@90 | 186 | return this; |
attila@90 | 187 | } |
attila@90 | 188 | break; |
attila@90 | 189 | case EXACT_CLASS: |
attila@90 | 190 | if(isAssignableFrom(other)) { |
attila@90 | 191 | return other; |
attila@90 | 192 | } |
attila@90 | 193 | break; |
attila@90 | 194 | case IS_ARRAY: |
attila@90 | 195 | if(validatorClass.isArray()) { |
attila@90 | 196 | return this; |
attila@90 | 197 | } |
attila@90 | 198 | break; |
attila@90 | 199 | case NONE: |
attila@90 | 200 | throw new AssertionError(); // Not possible |
attila@90 | 201 | } |
attila@90 | 202 | break; |
attila@90 | 203 | case EXACT_CLASS: |
attila@90 | 204 | switch(other.validationType) { |
attila@90 | 205 | case INSTANCE_OF: |
attila@90 | 206 | if(other.isAssignableFrom(this)) { |
attila@90 | 207 | return this; |
attila@90 | 208 | } |
attila@90 | 209 | break; |
attila@90 | 210 | case EXACT_CLASS: |
attila@90 | 211 | if(validatorClass == other.validatorClass) { |
attila@90 | 212 | return this; |
attila@90 | 213 | } |
attila@90 | 214 | break; |
attila@90 | 215 | case IS_ARRAY: |
attila@90 | 216 | if(validatorClass.isArray()) { |
attila@90 | 217 | return this; |
attila@90 | 218 | } |
attila@90 | 219 | break; |
attila@90 | 220 | case NONE: |
attila@90 | 221 | throw new AssertionError(); // Not possible |
attila@90 | 222 | } |
attila@90 | 223 | break; |
attila@90 | 224 | case IS_ARRAY: |
attila@90 | 225 | switch(other.validationType) { |
attila@90 | 226 | case INSTANCE_OF: |
attila@90 | 227 | case EXACT_CLASS: |
attila@90 | 228 | if(other.validatorClass.isArray()) { |
attila@90 | 229 | return other; |
attila@90 | 230 | } |
attila@90 | 231 | break; |
attila@90 | 232 | case IS_ARRAY: |
attila@90 | 233 | return this; |
attila@90 | 234 | case NONE: |
attila@90 | 235 | throw new AssertionError(); // Not possible |
attila@90 | 236 | } |
attila@90 | 237 | break; |
attila@90 | 238 | } |
attila@90 | 239 | throw new AssertionError("Incompatible composition " + this + " vs " + other); |
attila@90 | 240 | } |
attila@90 | 241 | |
attila@90 | 242 | private boolean isAssignableFrom(Validator other) { |
attila@90 | 243 | return validatorClass.isAssignableFrom(other.validatorClass); |
attila@90 | 244 | } |
attila@90 | 245 | |
attila@90 | 246 | @Override |
attila@90 | 247 | public String toString() { |
attila@90 | 248 | return "Validator[" + validationType + (validatorClass == null ? "" : (" " + validatorClass.getName())) + "]"; |
attila@90 | 249 | } |
attila@90 | 250 | } |
attila@90 | 251 | } |