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21 
22 
23 
24 #ifndef _BOOLEXPRESSION_HXX
25 #define _BOOLEXPRESSION_HXX
26 
27 // include for parent class
28 #include "computedexpression.hxx"
29 
30 namespace xforms
31 {
32 
33 /** BoolExpression represents a computed XPath expression that returns
34  * a bool value and caches the results.
35  *
36  * As this class has no virtual methods, it should never be used
37  * polymorphically. */
38 class BoolExpression : public ComputedExpression
39 {
40 public:
41     BoolExpression();
42     ~BoolExpression();
43 
44     /// set the expression string
45     /// (overridden for new definition of a simple expression)
46     void setExpression( const rtl::OUString& rExpression );
47 };
48 
49 } // namespace xforms
50 
51 #endif
52