/*

 * Copyright (c) 2015, 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.

 *

 * 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.

 */

import java.net.URI;

import java.lang.module.ModuleDescriptor;

import java.lang.reflect.Module;

import java.util.Collections;

import java.util.HashSet;

import java.util.Set;

import sun.hotspot.WhiteBox;

public class ModuleHelper {

    public static void DefineModule(Object module, String version, String location,

                                    String[] pkgs) throws Throwable {

        WhiteBox wb = WhiteBox.getWhiteBox();

        wb.DefineModule(module, version, location, pkgs);

    }

    public static void AddModuleExports(Object from, String pkg, Object to) throws Throwable {

        WhiteBox wb = WhiteBox.getWhiteBox();

        wb.AddModuleExports(from, pkg, to);

        java.lang.reflect.ModuleHelper.addExportsNoSync((Module)from, pkg, (Module)to);

    }

    public static void AddReadsModule(Object from, Object to) throws Throwable {

        WhiteBox wb = WhiteBox.getWhiteBox();

        wb.AddReadsModule(from, to);

        java.lang.reflect.ModuleHelper.addReadsNoSync((Module)from, (Module)to);

    }

    public static void AddModulePackage(Object m, String pkg) throws Throwable {

        WhiteBox wb = WhiteBox.getWhiteBox();

        wb.AddModulePackage(m, pkg);

        java.lang.reflect.ModuleHelper.addPackageNoSync((Module)m, pkg);

    }

    public static Module GetModuleByPackageName(Object ldr, String pkg) throws Throwable {

        WhiteBox wb = WhiteBox.getWhiteBox();

        return (Module)wb.GetModuleByPackageName(ldr, pkg);

    }

    public static void AddModuleExportsToAllUnnamed(Object m, String pkg) throws Throwable {

        WhiteBox wb = WhiteBox.getWhiteBox();

        wb.AddModuleExportsToAllUnnamed(m, pkg);

        //java.lang.reflect.ModuleHelper.addExportsToAllUnnamedNoSync((Module)m, pkg);

    }

    public static void AddModuleExportsToAll(Object m, String pkg) throws Throwable {

        WhiteBox wb = WhiteBox.getWhiteBox();

        wb.AddModuleExportsToAll(m, pkg);

        java.lang.reflect.ModuleHelper.addExportsNoSync((Module)m, pkg, (Module)null);

    }

    public static Module ModuleObject(String name, ClassLoader loader, String[] pkgs) throws Throwable {

        Set<String> pkg_set = new HashSet<>();

        if (pkgs != null) {

            for (String pkg: pkgs) {

                pkg_set.add(pkg.replace('/', '.'));

            }

        } else {

            pkg_set = Collections.emptySet();

        }

        ModuleDescriptor descriptor =

            ModuleDescriptor.module(name).contains(pkg_set).build();

        URI uri = URI.create("module:/" + name);

        return java.lang.reflect.ModuleHelper.newModule(loader, descriptor);

    }

}