/*

 * Copyright (c) 2002, 2011, 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.  Oracle designates this

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

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

 *

 * 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.

 */

package sun.misc;

import java.util.jar.JarFile;

import java.io.Console;

import java.io.FileDescriptor;

import java.security.ProtectionDomain;

import java.security.AccessController;

/** A repository of "shared secrets", which are a mechanism for

    calling implementation-private methods in another package without

    using reflection. A package-private class implements a public

    interface and provides the ability to call package-private methods

    within that package; the object implementing that interface is

    provided through a third package to which access is restricted.

    This framework avoids the primary disadvantage of using reflection

    for this purpose, namely the loss of compile-time checking. */

public class SharedSecrets {

    private static final Unsafe unsafe = Unsafe.getUnsafe();

    private static JavaUtilJarAccess javaUtilJarAccess;

    private static JavaLangAccess javaLangAccess;

    private static JavaIOAccess javaIOAccess;

    private static JavaNetAccess javaNetAccess;

    private static JavaNioAccess javaNioAccess;

    private static JavaIOFileDescriptorAccess javaIOFileDescriptorAccess;

    private static JavaSecurityProtectionDomainAccess javaSecurityProtectionDomainAccess;

    private static JavaSecurityAccess javaSecurityAccess;

    public static JavaUtilJarAccess javaUtilJarAccess() {

        if (javaUtilJarAccess == null) {

            // Ensure JarFile is initialized; we know that that class

            // provides the shared secret

            unsafe.ensureClassInitialized(JarFile.class);

        }

        return javaUtilJarAccess;

    }

    public static void setJavaUtilJarAccess(JavaUtilJarAccess access) {

        javaUtilJarAccess = access;

    }

    public static void setJavaLangAccess(JavaLangAccess jla) {

        javaLangAccess = jla;

    }

    public static JavaLangAccess getJavaLangAccess() {

        return javaLangAccess;

    }

    public static void setJavaNetAccess(JavaNetAccess jna) {

        javaNetAccess = jna;

    }

    public static JavaNetAccess getJavaNetAccess() {

        return javaNetAccess;

    }

    public static void setJavaNioAccess(JavaNioAccess jna) {

        javaNioAccess = jna;

    }

    public static JavaNioAccess getJavaNioAccess() {

        if (javaNioAccess == null) {

            // Ensure java.nio.ByteOrder is initialized; we know that

            // this class initializes java.nio.Bits that provides the

            // shared secret.

            unsafe.ensureClassInitialized(java.nio.ByteOrder.class);

        }

        return javaNioAccess;

    }

    public static void setJavaIOAccess(JavaIOAccess jia) {

        javaIOAccess = jia;

    }

    public static JavaIOAccess getJavaIOAccess() {

        if (javaIOAccess == null) {

            unsafe.ensureClassInitialized(Console.class);

        }

        return javaIOAccess;

    }

    public static void setJavaIOFileDescriptorAccess(JavaIOFileDescriptorAccess jiofda) {

        javaIOFileDescriptorAccess = jiofda;

    }

    public static JavaIOFileDescriptorAccess getJavaIOFileDescriptorAccess() {

        if (javaIOFileDescriptorAccess == null)

            unsafe.ensureClassInitialized(FileDescriptor.class);

        return javaIOFileDescriptorAccess;

    }

    public static void setJavaSecurityProtectionDomainAccess

        (JavaSecurityProtectionDomainAccess jspda) {

            javaSecurityProtectionDomainAccess = jspda;

    }

    public static JavaSecurityProtectionDomainAccess

        getJavaSecurityProtectionDomainAccess() {

            if (javaSecurityProtectionDomainAccess == null)

                unsafe.ensureClassInitialized(ProtectionDomain.class);

            return javaSecurityProtectionDomainAccess;

    }

    public static void setJavaSecurityAccess(JavaSecurityAccess jsa) {

        javaSecurityAccess = jsa;

    }

    public static JavaSecurityAccess getJavaSecurityAccess() {

        if (javaSecurityAccess == null) {

            unsafe.ensureClassInitialized(AccessController.class);

        }

        return javaSecurityAccess;

    }

}