jdk8-mips64-public/nashorn: src/jdk/internal/dynalink/beans/GuardedInvocationComponent.java@f8221ce53c2e

8008371: Fix Dynalink compiler warnings and whitespace
Reviewed-by: jlaskey, sundar

     1 /*

     2  * Copyright (c) 2010, 2013, Oracle and/or its affiliates. All rights reserved.

     3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

     4  *

     5  * This code is free software; you can redistribute it and/or modify it

     6  * under the terms of the GNU General Public License version 2 only, as

     7  * published by the Free Software Foundation.  Oracle designates this

     8  * particular file as subject to the "Classpath" exception as provided

     9  * by Oracle in the LICENSE file that accompanied this code.

    10  *

    11  * This code is distributed in the hope that it will be useful, but WITHOUT

    12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

    13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

    14  * version 2 for more details (a copy is included in the LICENSE file that

    15  * accompanied this code).

    16  *

    17  * You should have received a copy of the GNU General Public License version

    18  * 2 along with this work; if not, write to the Free Software Foundation,

    19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

    20  *

    21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

    22  * or visit www.oracle.com if you need additional information or have any

    23  * questions.

    24  */

    26 /*

    27  * This file is available under and governed by the GNU General Public

    28  * License version 2 only, as published by the Free Software Foundation.

    29  * However, the following notice accompanied the original version of this

    30  * file, and Oracle licenses the original version of this file under the BSD

    31  * license:

    32  */

    33 /*

    34    Copyright 2009-2013 Attila Szegedi

    36    Licensed under both the Apache License, Version 2.0 (the "Apache License")

    37    and the BSD License (the "BSD License"), with licensee being free to

    38    choose either of the two at their discretion.

    40    You may not use this file except in compliance with either the Apache

    41    License or the BSD License.

    43    If you choose to use this file in compliance with the Apache License, the

    44    following notice applies to you:

    46        You may obtain a copy of the Apache License at

    48            http://www.apache.org/licenses/LICENSE-2.0

    50        Unless required by applicable law or agreed to in writing, software

    51        distributed under the License is distributed on an "AS IS" BASIS,

    52        WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or

    53        implied. See the License for the specific language governing

    54        permissions and limitations under the License.

    56    If you choose to use this file in compliance with the BSD License, the

    57    following notice applies to you:

    59        Redistribution and use in source and binary forms, with or without

    60        modification, are permitted provided that the following conditions are

    61        met:

    62        * Redistributions of source code must retain the above copyright

    63          notice, this list of conditions and the following disclaimer.

    64        * Redistributions in binary form must reproduce the above copyright

    65          notice, this list of conditions and the following disclaimer in the

    66          documentation and/or other materials provided with the distribution.

    67        * Neither the name of the copyright holder nor the names of

    68          contributors may be used to endorse or promote products derived from

    69          this software without specific prior written permission.

    71        THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS

    72        IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED

    73        TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A

    74        PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL COPYRIGHT HOLDER

    75        BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR

    76        CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF

    77        SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR

    78        BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,

    79        WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR

    80        OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF

    81        ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

    82 */

    84 package jdk.internal.dynalink.beans;

    86 import java.lang.invoke.MethodHandle;

    87 import jdk.internal.dynalink.linker.GuardedInvocation;

    89 /**

    90  * Represents one component for a GuardedInvocation of a potentially composite operation of an

    91  * {@link AbstractJavaLinker}. In addition to holding a guarded invocation, it holds semantic information about its

    92  * guard. All guards produced in the AbstractJavaLinker are either "Class.isInstance()" or "getClass() == clazz"

    93  * expressions. This allows choosing the most restrictive guard as the guard for the composition of two components.

    94  * @author Attila Szegedi

    95  * @version $Id: $

    96  */

    97 class GuardedInvocationComponent {

    98     enum ValidationType {

    99         NONE, // No guard; the operation can be linked unconditionally (quite rare); least strict.

   100         INSTANCE_OF, // "validatorClass.isInstance(obj)" guard

   101         EXACT_CLASS, // "obj.getClass() == validatorClass" guard; most strict.

   102         IS_ARRAY, // "obj.getClass().isArray()"

   103     }

   105     private final GuardedInvocation guardedInvocation;

   106     private final Validator validator;

   108     GuardedInvocationComponent(MethodHandle invocation) {

   109         this(invocation, null, ValidationType.NONE);

   110     }

   112     GuardedInvocationComponent(MethodHandle invocation, MethodHandle guard, ValidationType validationType) {

   113         this(invocation, guard, null, validationType);

   114     }

   116     GuardedInvocationComponent(MethodHandle invocation, MethodHandle guard, Class<?> validatorClass,

   117             ValidationType validationType) {

   118         this(invocation, guard, new Validator(validatorClass, validationType));

   119     }

   121     GuardedInvocationComponent(GuardedInvocation guardedInvocation, Class<?> validatorClass,

   122             ValidationType validationType) {

   123         this(guardedInvocation, new Validator(validatorClass, validationType));

   124     }

   126     GuardedInvocationComponent replaceInvocation(MethodHandle newInvocation) {

   127         return replaceInvocation(newInvocation, guardedInvocation.getGuard());

   128     }

   130     GuardedInvocationComponent replaceInvocation(MethodHandle newInvocation, MethodHandle newGuard) {

   131         return new GuardedInvocationComponent(guardedInvocation.replaceMethods(newInvocation,

   132                 newGuard), validator);

   133     }

   135     private GuardedInvocationComponent(MethodHandle invocation, MethodHandle guard, Validator validator) {

   136         this(new GuardedInvocation(invocation, guard), validator);

   137     }

   139     private GuardedInvocationComponent(GuardedInvocation guardedInvocation, Validator validator) {

   140         this.guardedInvocation = guardedInvocation;

   141         this.validator = validator;

   142     }

   144     GuardedInvocation getGuardedInvocation() {

   145         return guardedInvocation;

   146     }

   148     Class<?> getValidatorClass() {

   149         return validator.validatorClass;

   150     }

   152     ValidationType getValidationType() {

   153         return validator.validationType;

   154     }

   156     GuardedInvocationComponent compose(MethodHandle compositeInvocation, MethodHandle otherGuard,

   157             Class<?> otherValidatorClass, ValidationType otherValidationType) {

   158         final Validator compositeValidator = validator.compose(new Validator(otherValidatorClass, otherValidationType));

   159         final MethodHandle compositeGuard = compositeValidator == validator ? guardedInvocation.getGuard() : otherGuard;

   160         return new GuardedInvocationComponent(compositeInvocation, compositeGuard, compositeValidator);

   161     }

   163     private static class Validator {

   164         /*private*/ final Class<?> validatorClass;

   165         /*private*/ final ValidationType validationType;

   167         Validator(Class<?> validatorClass, ValidationType validationType) {

   168             this.validatorClass = validatorClass;

   169             this.validationType = validationType;

   170         }

   172         Validator compose(Validator other) {

   173             if(other.validationType == ValidationType.NONE) {

   174                 return this;

   175             }

   176             switch(validationType) {

   177                 case NONE:

   178                     return other;

   179                 case INSTANCE_OF:

   180                     switch(other.validationType) {

   181                         case INSTANCE_OF:

   182                             if(isAssignableFrom(other)) {

   183                                 return other;

   184                             } else if(other.isAssignableFrom(this)) {

   185                                 return this;

   186                             }

   187                             break;

   188                         case EXACT_CLASS:

   189                             if(isAssignableFrom(other)) {

   190                                 return other;

   191                             }

   192                             break;

   193                         case IS_ARRAY:

   194                             if(validatorClass.isArray()) {

   195                                 return this;

   196                             }

   197                             break;

   198                         default:

   199                             throw new AssertionError();

   200                     }

   201                     break;

   202                 case EXACT_CLASS:

   203                     switch(other.validationType) {

   204                         case INSTANCE_OF:

   205                             if(other.isAssignableFrom(this)) {

   206                                 return this;

   207                             }

   208                             break;

   209                         case EXACT_CLASS:

   210                             if(validatorClass == other.validatorClass) {

   211                                 return this;

   212                             }

   213                             break;

   214                         case IS_ARRAY:

   215                             if(validatorClass.isArray()) {

   216                                 return this;

   217                             }

   218                             break;

   219                         default:

   220                             throw new AssertionError();

   221                     }

   222                     break;

   223                 case IS_ARRAY:

   224                     switch(other.validationType) {

   225                         case INSTANCE_OF:

   226                         case EXACT_CLASS:

   227                             if(other.validatorClass.isArray()) {

   228                                 return other;

   229                             }

   230                             break;

   231                         case IS_ARRAY:

   232                             return this;

   233                         default:

   234                             throw new AssertionError();

   235                     }

   236                     break;

   237                 default:

   238                     throw new AssertionError();

   239             }

   240             throw new AssertionError("Incompatible composition " + this + " vs " + other);

   241         }

   243         private boolean isAssignableFrom(Validator other) {

   244             return validatorClass.isAssignableFrom(other.validatorClass);

   245         }

   247         @Override

   248         public String toString() {

   249             return "Validator[" + validationType + (validatorClass == null ? "" : (" " + validatorClass.getName())) + "]";

   250         }

   251     }

   252 }

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

src/jdk/internal/dynalink/beans/GuardedInvocationComponent.java@f8221ce53c2e

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