Namespace Xpath
Class CFunctionLibrary

class CFunctionLibrary: public CInterface {
public:
    CFunctionLibrary();
    virtual ~CFunctionLibrary();
public:
    virtual bool IsFunctionAvailable(
        const CString &strNamespaceUri,
        const CString &strLocalName) = 0;
    virtual XFunction FindFunction(
        const CString &strNamespaceUri,
        const CString &strLocalName) = 0;
    };

The abstract interface to XPath function libraries.

Since:

1.00.00

Version:

1.00.00

Author:

Alexey Gokhberg

See Also:

CFunction

CFunctionLibrary

CFunctionLibrary();

Constructs the function library.

~CFunctionLibrary

virtual ~CFunctionLibrary();

Destroys the function library.

IsFunctionAvailable

virtual bool IsFunctionAvailable(
    const CString &strNamespaceUri,
    const CString &strLocalName) = 0;

Tests whether a function with the given namespace URI and local name is available in this function library.

Parameters:

strNamespaceUri - the namespace URI of a function

strLocalName - the local name of a function

Returns:

true if the function with the given namespace URI and local name is available in this function library; false otherwise

FindFunction

virtual XFunction FindFunction(
    const CString &strNamespaceUri,
    const CString &strLocalName) = 0;

Looks up a function with the given namespace URI and local name in this function library.

Parameters:

strNamespaceUri - the namespace URI of a function to look up

strLocalName - the local name of a function to look up

Returns:

the function with the given namespace URI and local name, or NULL if none was found