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#ifndef __com_sun_star_util_XStringSubstitution_idl__ 
#define __com_sun_star_util_XStringSubstitution_idl__ 

#ifndef __com_sun_star_uno_XInterface_idl__ 
#include <com/sun/star/uno/XInterface.idl> 
#endif 

#ifndef __com_sun_star_container_NoSuchElementException_idl__
#include <com/sun/star/container/NoSuchElementException.idl>
#endif

//============================================================================= 

 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 OpenOffice 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 it's 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 successfull substitution is required. The 
			function throws a <type scope="com::sun::star::container">NoSuchElementException</type>
			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 it's 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 resubtituted.
	*/
	
	string reSubstituteVariables( [in] string aText );

	//-------------------------------------------------------------------------
	/** Returns the current value of a variable.
	  
		<p>
		The method iterates through it's internal variable list and tries to 
		find the given variable. If the variable is unkown a 
		<type scope="com::sun::star::container">NoSuchElementException</type>
		is thrown.
		</p>

        @param variable
            The name of a variable.
            
        @return
            Returns a string that represents the variable. If the
			variable is unknown a <type scope="com::sun::star::container">NoSuchElementException</type>
			is thrown.
	*/
	string getSubstituteVariableValue( [in] string variable ) 
		raises (::com::sun::star::container::NoSuchElementException );
};

//============================================================================= 
 
}; }; }; };  

#endif