jna-master/contrib/platform/src/com/sun/jna/platform/win32/COM/UnknownListener.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;

import com.sun.jna.Pointer;
import com.sun.jna.Structure;
import com.sun.jna.Structure.FieldOrder;
import com.sun.jna.platform.win32.Guid.REFIID;
import com.sun.jna.platform.win32.WinNT.HRESULT;
import com.sun.jna.ptr.PointerByReference;

@FieldOrder({"vtbl"})
public class UnknownListener extends Structure {
    public UnknownVTable.ByReference vtbl;

    public UnknownListener(IUnknownCallback callback) {
        this.vtbl = this.constructVTable();
        this.initVTable(callback);
        super.write();
    }

    protected UnknownVTable.ByReference constructVTable() {
        return new UnknownVTable.ByReference();
    }

    protected void initVTable(final IUnknownCallback callback) {
        this.vtbl.QueryInterfaceCallback = new UnknownVTable.QueryInterfaceCallback() {
            @Override
            public HRESULT invoke(Pointer thisPointer, REFIID refid, PointerByReference ppvObject) {
                return callback.QueryInterface(refid, ppvObject);
            }
        };
        this.vtbl.AddRefCallback = new UnknownVTable.AddRefCallback() {
            @Override
            public int invoke(Pointer thisPointer) {
                return callback.AddRef();
            }
        };
        this.vtbl.ReleaseCallback = new UnknownVTable.ReleaseCallback() {
            @Override
            public int invoke(Pointer thisPointer) {
                return callback.Release();
            }
        };
    }

}
