diff options
author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-15 05:54:39 +0000 |
---|---|---|
committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-15 05:54:39 +0000 |
commit | 267c6f2ac71f92999e969232431ba04678e7437e (patch) | |
tree | 358c9467650e1d0a1d7227a21dac2e3d08b622b2 /udkapi/com/sun/star/uno/XInterface.idl | |
parent | Initial commit. (diff) | |
download | libreoffice-267c6f2ac71f92999e969232431ba04678e7437e.tar.xz libreoffice-267c6f2ac71f92999e969232431ba04678e7437e.zip |
Adding upstream version 4:24.2.0.upstream/4%24.2.0
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'udkapi/com/sun/star/uno/XInterface.idl')
-rw-r--r-- | udkapi/com/sun/star/uno/XInterface.idl | 112 |
1 files changed, 112 insertions, 0 deletions
diff --git a/udkapi/com/sun/star/uno/XInterface.idl b/udkapi/com/sun/star/uno/XInterface.idl new file mode 100644 index 0000000000..b34df5f346 --- /dev/null +++ b/udkapi/com/sun/star/uno/XInterface.idl @@ -0,0 +1,112 @@ +/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */ +/* + * This file is part of the LibreOffice project. + * + * This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. + * + * This file incorporates work covered by the following license notice: + * + * Licensed to the Apache Software Foundation (ASF) under one or more + * contributor license agreements. See the NOTICE file distributed + * with this work for additional information regarding copyright + * ownership. The ASF licenses this file to you under the Apache + * License, Version 2.0 (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.apache.org/licenses/LICENSE-2.0 . + */ + + + module com { module sun { module star { module uno { + +/** base interface of all UNO interfaces + + <p> It provides lifetime control by reference counting and the + possibility of querying for other + interfaces of the same logical object. + + + <p> + "Logical Object" in this case means that the + interfaces actually can be supported by internal (e.g. aggregated) physical objects.</p> + + <p> Deriving from this interface is mandatory for all UNO interfaces. + <p> Each language binding (Java, C++, StarBasic, Python, ... ) may + provide a different mapping of this interface, please look into the language + dependent documentation. + + <p> The UNO object does not export the state of the reference count (acquire() and + release() do not have return values). In general, also the UNO object itself + should not make any assumption on the concrete value of the reference count + (except on the transition from one to zero ). + + */ +published interface XInterface +{ + /** queries for a new interface to an existing UNO object. + <p> + The queryInterface() method is the entry point to obtain other interfaces which + are exported by the object. The caller asks the implementation of the object, + if it supports the interface specified by the type argument. The call may either + return with an interface reference of the requested type or with a void any. + + <p> + There are certain specifications, a queryInterface() implementation must not violate. + <p> + 1) If queryInterface on a specific object has once returned a valid interface reference + for a given type, it must return a valid reference for any successive queryInterface + calls on this object for the same type. + <p> + 2) If queryInterface on a specific object has once returned a null reference + for a given type, it must always return a null reference for the same type. + <p> + 3) If queryInterface on a reference A returns reference B, queryInterface on + B for Type A must return interface reference A or calls made on the returned + reference must be equivalent to calls made on reference A. + <p> + 4) If queryInterface on a reference A returns reference B, queryInterface on + A and B for XInterface must return the same interface reference (object identity). + + <p> The reason for the strong specification is, that a Uno Runtime Environment (URE) + may choose to cache queryInterface() calls. + <p> As mentioned above, certain language bindings may map this function differently also + with different specifications, please visit the language dependent specification for it. + The current C++ binding sticks to the specification state + <p> + The rules mentioned above are basically identical to the rules of QueryInterface in MS COM. + + @param aType a UNO interface type, for which an object reference shall be obtained. + @return an interface reference in case the requested interface is supported by the object, + a void any otherwise. + */ + any queryInterface( [in] type aType ); + + /** increases the reference counter by one. + + <p>When you have called acquire() on the + UNO object, it is often said, that you have a reference or a hard reference + to the object. + + <p> + It is only allowed to invoke a method on a UNO object, when you keep + a hard reference to it. + + <p> Every call to acquire must be followed by a corresponding call to release + some time later, which may eventually lead to the destruction of the object. + */ + void acquire(); + + /** decreases the reference counter by one. + <p>When the reference counter reaches 0, the object gets deleted.</p> + <p>Calling release() on the object is often called releasing + or clearing the reference to an object. + */ + void release(); + +}; + + +}; }; }; }; + +/* vim:set shiftwidth=4 softtabstop=4 expandtab: */ |