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/* -*- 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 .
 */

#ifndef __com_sun_star_util_XStringSubstitution_idl__
#define __com_sun_star_util_XStringSubstitution_idl__

#include <com/sun/star/uno/XInterface.idl>
#include <com/sun/star/container/NoSuchElementException.idl>


 module com {  module sun {  module star {  module  util {

/** A common interface for substituting string variables with
    other strings.

    <p>
    The substitution algorithm and the syntax for a string variable are
    not part of this interface definition.  Please look at the documentation
    of the implementation that must specify these parameters.
    </p>

    @since OOo 1.1.2
*/
published interface XStringSubstitution : com::sun::star::uno::XInterface
{
    /** Exchanges variables inside a given text with a substitution text
        defined for the variables.

        <p>
        The method iterates through its internal variables list to match the
        variables in the given string. A match replaces the variable with the
        string defined for this variable. If no variable can be found in the string
        it will be returned unchanged. The behavior if a variable is found in
        the string but it is unknown for the implementation depends on the parameter
        bSubstRequired.
        </p>

        @param aText
            A string containing variables that should be substituted.

        @param bSubstRequired
            Specifies if a successful substitution is required. The
            function throws a com::sun::star::container::NoSuchElementException
            if it finds a variable that is unknown. In this case it is possible
            that the returned string would not be what the caller expected!

        @return
            Returns a string based on <var>aText</var> where all variables were
            exchanged with their value defined at calling time.
    */
    string substituteVariables( [in] string aText, [in] boolean bSubstRequired )
        raises( com::sun::star::container::NoSuchElementException );

    /** Tries to replace parts of aText with variables that represents
        these sub strings.

        <p>
        The method iterates through its internal variable list and tries to match
        parts of the given string Tries to replace parts of <var>aText</var> with
        variables that represents these sub strings.If more than one variable
        matches the one with the longest matching sub string will be chosen.
        </p>

        @param aText
            A string where known substrings should be replaced by variables.

        @return
            Returns the resubstituted string with variables for all parts
            that could be replaced. The unchanged argument will be returned
            if nothing can be resubstituted.
    */

    string reSubstituteVariables( [in] string aText );

    /** Returns the current value of a variable.

        <p>
        The method iterates through its internal variable list and tries to
        find the given variable. If the variable is unknown a
        com::sun::star::container::NoSuchElementException
        is thrown.
        </p>

        @param variable
            The name of a variable.

        @return
            Returns a string that represents the variable. If the
            variable is unknown a com::sun::star::container::NoSuchElementException
            is thrown.
    */
    string getSubstituteVariableValue( [in] string variable )
        raises (::com::sun::star::container::NoSuchElementException );
};


}; }; }; };

#endif

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