/*

 * 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 java.dyn;

import java.dyn.MethodHandles.Lookup;

import java.util.WeakHashMap;

import sun.dyn.Access;

import sun.dyn.MethodHandleImpl;

import sun.dyn.util.VerifyAccess;

import sun.reflect.Reflection;

import static sun.dyn.MemberName.newIllegalArgumentException;

/**

 * <em>CLASS WILL BE REMOVED FOR PFD:</em>

 * Static routines for controlling invokedynamic behavior.

 * Replaced by non-static APIs.

 * @author John Rose, JSR 292 EG

 * @deprecated This class will be removed in the Public Final Draft.

 */

public class Linkage {

    private static final Access IMPL_TOKEN = Access.getToken();

    private Linkage() {}  // do not instantiate

    /**

     * <em>METHOD WILL BE REMOVED FOR PFD:</em>

     * Register a <em>bootstrap method</em> to use when linking dynamic call sites within

     * a given caller class.

     * @deprecated Use @{@link BootstrapMethod} annotations instead.

     */

    public static

    void registerBootstrapMethod(Class callerClass, MethodHandle bootstrapMethod) {

        Class callc = Reflection.getCallerClass(2);

        if (callc != null && !VerifyAccess.isSamePackage(callerClass, callc))

            throw new IllegalArgumentException("cannot set bootstrap method on "+callerClass);

        MethodHandleImpl.registerBootstrap(IMPL_TOKEN, callerClass, bootstrapMethod);

    }

    /**

     * <em>METHOD WILL BE REMOVED FOR PFD:</em>

     * Simplified version of {@code registerBootstrapMethod} for self-registration,

     * to be called from a static initializer.

     * @deprecated Use @{@link BootstrapMethod} annotations instead.

     */

    public static

    void registerBootstrapMethod(Class<?> runtime, String name) {

        Class callerClass = Reflection.getCallerClass(2);

        registerBootstrapMethodLookup(callerClass, runtime, name);

    }

    /**

     * <em>METHOD WILL BE REMOVED FOR PFD:</em>

     * Simplified version of {@code registerBootstrapMethod} for self-registration,

     * @deprecated Use @{@link BootstrapMethod} annotations instead.

     */

    public static

    void registerBootstrapMethod(String name) {

        Class callerClass = Reflection.getCallerClass(2);

        registerBootstrapMethodLookup(callerClass, callerClass, name);

    }

    private static

    void registerBootstrapMethodLookup(Class<?> callerClass, Class<?> runtime, String name) {

        Lookup lookup = new Lookup(IMPL_TOKEN, callerClass);

        MethodHandle bootstrapMethod;

        try {

            bootstrapMethod = lookup.findStatic(runtime, name, BOOTSTRAP_METHOD_TYPE);

        } catch (NoAccessException ex) {

            throw new IllegalArgumentException("no such bootstrap method in "+runtime+": "+name, ex);

        }

        MethodHandleImpl.registerBootstrap(IMPL_TOKEN, callerClass, bootstrapMethod);

    }

    private static final MethodType BOOTSTRAP_METHOD_TYPE

            = MethodType.methodType(CallSite.class,

                                    Class.class, String.class, MethodType.class);

    /**

     * <em>METHOD WILL BE REMOVED FOR PFD:</em>

     * Invalidate all <code>invokedynamic</code> call sites everywhere.

     * @deprecated Use {@linkplain CallSite#setTarget call site target setting}

     * and {@link VolatileCallSite#invalidateAll call site invalidation} instead.

     */

    public static

    Object invalidateAll() {

        throw new UnsupportedOperationException();

    }

    /**

     * <em>METHOD WILL BE REMOVED FOR PFD:</em>

     * Invalidate all {@code invokedynamic} call sites in the bytecodes

     * of any methods of the given class.

     * @deprecated Use {@linkplain CallSite#setTarget call site target setting}

     * and {@link VolatileCallSite#invalidateAll call site invalidation} instead.

     */

    public static

    Object invalidateCallerClass(Class<?> callerClass) {

        throw new UnsupportedOperationException();

    }

}