/* Copyright (c) 2012 Tobias Wolf, All Rights Reserved
 * 
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 * 
 * This library 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
 * Lesser General Public License for more details.  
 */
package com.sun.jna.platform.win32.COM;

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

// TODO: Auto-generated Javadoc
/**
 * Wrapper class for the ITypeInfo interface
 * 
 * Method Name V-Table Offset IUnknown.QueryInterface 0 IUnknown.AddRef 4
 * IUnknown.Release 8
 * 
 * @author Tobias Wolf, wolf.tobias@gmx.net
 */
public class Unknown extends COMInvoker implements IUnknown {

    public static class ByReference extends Unknown implements
            Structure.ByReference {
    }

    public Unknown() {
    }

    /**
     * Instantiates a new i unknown.
     * 
     * @param pvInstance
     *            the pv instance
     */
    public Unknown(Pointer pvInstance) {
        this.setPointer(pvInstance);
    }

    /**
     * Query interface.
     * 
     * @param riid
     *            the riid
     * @param ppvObject
     *            the ppv object
     * @return the hresult
     */
    public HRESULT QueryInterface(REFIID.ByValue riid, PointerByReference ppvObject) {
        return (HRESULT) this._invokeNativeObject(0,
                new Object[] { this.getPointer(), riid, ppvObject },
                HRESULT.class);
    }

    public int AddRef() {
        return this._invokeNativeInt(1, new Object[] { this.getPointer() });
    }

    public int Release() {
        return this._invokeNativeInt(2, new Object[] { this.getPointer() });
    }
}
