jna-master/contrib/platform/src/com/sun/jna/platform/win32/COM/util/IUnknown.java
/* Copyright (c) 2014 Dr David H. Akehurst (itemis), All Rights Reserved
 *
 * The contents of this file is dual-licensed under 2
 * alternative Open Source/Free licenses: LGPL 2.1 or later and
 * Apache License 2.0. (starting with JNA version 4.0.0).
 *
 * You can freely decide which license you want to apply to
 * the project.
 *
 * You may obtain a copy of the LGPL License at:
 *
 * http://www.gnu.org/licenses/licenses.html
 *
 * A copy is also included in the downloadable source code package
 * containing JNA, in file "LGPL2.1".
 *
 * You may obtain a copy of the Apache License at:
 *
 * http://www.apache.org/licenses/
 *
 * A copy is also included in the downloadable source code package
 * containing JNA, in file "AL2.0".
 */
package com.sun.jna.platform.win32.COM.util;

import com.sun.jna.platform.win32.COM.COMException;
import com.sun.jna.platform.win32.COM.util.annotation.ComInterface;

/**
 * Java friendly version of the IUnknown interface.
 *
 *
 */
@ComInterface(iid="{00000000-0000-0000-C000-000000000046}")
public interface IUnknown {
    /**
     * Returns a proxy object for the given interface. Assuming that the
     * interface is annotated with a ComInterface annotation that provides a
     * valid iid.
     * <p>
     * Will throw COMException if an error occurs trying to retrieve the
     * requested interface, see exception cause for details.
     * <p>
     */
    <T> T queryInterface(Class<T> comInterface) throws COMException;
}
