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 * Copyright (c) 2018, 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.

 *

 * 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.

 *

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package org.graalvm.compiler.hotspot.meta;

import java.lang.module.ModuleDescriptor.Requires;

import jdk.internal.vm.compiler.collections.EconomicSet;

import org.graalvm.compiler.phases.tiers.CompilerConfiguration;

/**

 * Determines if methods in a given class can be intrinsified.

 *

 * Only classes loaded from the module defining the compiler configuration or any of its transitive

 * dependencies can be intrinsified.

 *

 * This version of the class must be used on JDK 9 or later.

 */

public final class IntrinsificationPredicate {

    /**

     * Set of modules composed of the module defining the compiler configuration and its transitive

     * dependencies.

     */

    private final EconomicSet<Module> trustedModules;

    IntrinsificationPredicate(CompilerConfiguration compilerConfiguration) {

        trustedModules = EconomicSet.create();

        Module compilerConfigurationModule = compilerConfiguration.getClass().getModule();

        if (compilerConfigurationModule.getDescriptor().isAutomatic()) {

            throw new IllegalArgumentException(String.format("The module '%s' defining the Graal compiler configuration class '%s' must not be an automatic module",

                            compilerConfigurationModule.getName(), compilerConfiguration.getClass().getName()));

        }

        trustedModules.add(compilerConfigurationModule);

        for (Requires require : compilerConfigurationModule.getDescriptor().requires()) {

            for (Module module : compilerConfigurationModule.getLayer().modules()) {

                if (module.getName().equals(require.name())) {

                    trustedModules.add(module);

                }

            }

        }

    }

    public boolean apply(Class<?> declaringClass) {

        Module module = declaringClass.getModule();

        return trustedModules.contains(module);

    }

}