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6983726: Reimplement MethodHandleProxies.asInterfaceInstance

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Co-authored-by: Mandy Chung <mchung@openjdk.org>
Reviewed-by: jvernee, mchung
This commit is contained in:
Chen Liang 2023-07-20 00:59:28 +00:00 • committed by Mandy Chung
parent 71cac8ce47
commit 5d57b5c2f0
13 changed files with 1151 additions and 403 deletions
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48
src/java.base/share/classes/sun/invoke/WrapperInstance.java
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/*
* Copyright (c) 2011, 2013, 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.invoke;
import java.lang.invoke.MethodHandle;
/**
* Private API used inside of java.lang.invoke.MethodHandles.
* Interface implemented by every object which is produced by
* {@link java.lang.invoke.MethodHandleProxies#asInterfaceInstance MethodHandleProxies.asInterfaceInstance}.
* The methods of this interface allow a caller to recover the parameters
* to {@code asInstance}.
* This allows applications to repeatedly convert between method handles
* and SAM objects, without the risk of creating unbounded delegation chains.
*/
public interface WrapperInstance {
/** Produce or recover a target method handle which is behaviorally
* equivalent to the SAM method of this object.
*/
public MethodHandle getWrapperInstanceTarget();
/** Recover the SAM type for which this object was created.
*/
public Class<?> getWrapperInstanceType();
}