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Diffstat (limited to 'udkapi/com/sun/star/uno/XInterface.idl')
| -rw-r--r-- | udkapi/com/sun/star/uno/XInterface.idl | 134 |
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diff --git a/udkapi/com/sun/star/uno/XInterface.idl b/udkapi/com/sun/star/uno/XInterface.idl new file mode 100644 index 000000000000..440b3fe95db1 --- /dev/null +++ b/udkapi/com/sun/star/uno/XInterface.idl @@ -0,0 +1,134 @@ +/************************************************************************* + * + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. + * + * Copyright 2000, 2010 Oracle and/or its affiliates. + * + * OpenOffice.org - a multi-platform office productivity suite + * + * This file is part of OpenOffice.org. + * + * OpenOffice.org is free software: you can redistribute it and/or modify + * it under the terms of the GNU Lesser General Public License version 3 + * only, as published by the Free Software Foundation. + * + * OpenOffice.org 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 version 3 for more details + * (a copy is included in the LICENSE file that accompanied this code). + * + * You should have received a copy of the GNU Lesser General Public License + * version 3 along with OpenOffice.org. If not, see + * <http://www.openoffice.org/license.html> + * for a copy of the LGPLv3 License. + * + ************************************************************************/ +#ifndef __com_sun_star_uno_XInterface_idl__ +#define __com_sun_star_uno_XInterface_idl__ + +//============================================================================= + + module com { module sun { module star { module uno { + +//============================================================================= + +// DocMerge from xml: interface com::sun::star::uno::XInterface +/** 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 documention. + + <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 a 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 an 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. + */ + [oneway] void acquire(); + + //------------------------------------------------------------------------- + + // DocMerge from xml: method com::sun::star::uno::XInterface::release + /** 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. + */ + [oneway] void release(); + +}; + +//============================================================================= + +}; }; }; }; + +/*============================================================================= + +=============================================================================*/ +#endif |