forms/source/xforms/pathexpression.hxx

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  19
  20 #ifndef INCLUDED_FORMS_SOURCE_XFORMS_PATHEXPRESSION_HXX
  21 #define INCLUDED_FORMS_SOURCE_XFORMS_PATHEXPRESSION_HXX
  22
  23 #include "computedexpression.hxx"
  24
  25 #include <vector>
  26
  27 // forward declaractions
  28 namespace com { namespace sun { namespace star
  29 {
  30     namespace xml { namespace dom
  31     {
  32         class XNodeList;
  33         namespace events { class XEventListener; }
  34     } }
  35 } } }
  36
  37
  38
  39 namespace xforms
  40 {
  41
  42 /** PathExpression represents an XPath Expression and caches results */
  43 class PathExpression : public ComputedExpression
  44 {
  45 public:
  46     typedef std::vector<com::sun::star::uno::Reference<com::sun::star::xml::dom::XNode> > NodeVector_t;
  47
  48 private:
  49     /// the node-list result from the last bind (cached from mxResult)
  50     NodeVector_t maNodes;
  51
  52 protected:
  53     /// get expression for evaluation
  54     const OUString _getExpressionForEvaluation() const;
  55
  56
  57 public:
  58     PathExpression();
  59     ~PathExpression();
  60
  61     /// set the expression string
  62     /// (overridden to do remove old listeners)
  63     /// (also defines simple expressions)
  64     void setExpression( const OUString& rExpression );
  65
  66
  67     /// evaluate the expression relative to the content node.
  68     bool evaluate( const xforms::EvaluationContext& rContext );
  69
  70
  71     // get the result of this expression as node/node list/...
  72     com::sun::star::uno::Reference<com::sun::star::xml::dom::XNode> getNode() const;
  73     const NodeVector_t getNodeList() const { return maNodes;}
  74     com::sun::star::uno::Reference<com::sun::star::xml::dom::XNodeList> getXNodeList() const;
  75
  76 };
  77
  78 } // namespace xforms
  79
  80 #endif
  81
  82 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */