source: vbox/trunk/src/libs/xpcom18a4/xpcom/io/nsIObjectInputStream.idl@ 53433

/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/* ***** BEGIN LICENSE BLOCK *****
 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
 *
 * The contents of this file are subject to the Mozilla Public License Version
 * 1.1 (the "License"); you may not use this file except in compliance with
 * the License. You may obtain a copy of the License at
 * http://www.mozilla.org/MPL/
 *
 * Software distributed under the License is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * for the specific language governing rights and limitations under the
 * License.
 *
 * The Original Code is Mozilla FastLoad code.
 *
 * The Initial Developer of the Original Code is
 * Netscape Communications Corporation.
 * Portions created by the Initial Developer are Copyright (C) 2001
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 *   Brendan Eich <[email protected]> (original author)
 *
 * Alternatively, the contents of this file may be used under the terms of
 * either of the GNU General Public License Version 2 or later (the "GPL"),
 * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
 * in which case the provisions of the GPL or the LGPL are applicable instead
 * of those above. If you wish to allow use of your version of this file only
 * under the terms of either the GPL or the LGPL, and not to allow others to
 * use your version of this file under the terms of the MPL, indicate your
 * decision by deleting the provisions above and replace them with the notice
 * and other provisions required by the GPL or the LGPL. If you do not delete
 * the provisions above, a recipient may use your version of this file under
 * the terms of any one of the MPL, the GPL or the LGPL.
 *
 * ***** END LICENSE BLOCK ***** */

#include "nsIBinaryInputStream.idl"
#include "nsrootidl.idl"

/**
 * @see nsIObjectOutputStream
 * @see nsIBinaryInputStream
 */

[scriptable, uuid(6c248606-4eae-46fa-9df0-ba58502368eb)]
interface nsIObjectInputStream : nsIBinaryInputStream
{
    /**
     * Read an object from this stream to satisfy a strong or weak reference
     * to one of its interfaces.  If the interface was not along the primary
     * inheritance chain ending in the "root" or XPCOM-identity nsISupports,
     * readObject will QueryInterface from the deserialized object root to the
     * correct interface, which was specified when the object was serialized.
     *
     * @see nsIObjectOutputStream
     */
    nsISupports readObject(in PRBool aIsStrongRef);

    [notxpcom] nsresult readID(out nsID aID);

    /**
     * Optimized deserialization support -- see nsIStreamBufferAccess.idl.
     */
    [notxpcom] charPtr getBuffer(in PRUint32 aLength, in PRUint32 aAlignMask);
    [notxpcom] void    putBuffer(in charPtr aBuffer, in PRUint32 aLength);
};

%{C++

inline nsresult
NS_ReadOptionalObject(nsIObjectInputStream* aStream, PRBool aIsStrongRef,
                      nsISupports* *aResult)
{
    PRBool nonnull;
    nsresult rv = aStream->ReadBoolean(&nonnull);
    if (NS_SUCCEEDED(rv)) {
        if (nonnull)
            rv = aStream->ReadObject(aIsStrongRef, aResult);
        else
            *aResult = nsnull;
    }
    return rv;
}

%}