If a SAX parser provides location information to the SAX * application, it does so by implementing this interface and then * passing an instance to the application using the document * handler's setDocumentLocator method. The application can use the * object to obtain the location of any other document handler event * in the XML source document.
* *Note that the results returned by the object will be valid only * during the scope of each document handler method: the application * will receive unpredictable results if it attempts to use the * locator at any other time.
* *SAX parsers are not required to supply a locator, but they are * very strong encouraged to do so. If the parser supplies a * locator, it must do so before reporting any other document events. * If no locator has been set by the time the application receives * the startDocument event, the application should assume that a * locator is not available.
* * @see DocumentHandler#setDocumentLocator */ class SAX_EXPORT Locator { public: /** @name Constructors and Destructor */ //@{ /** Default constructor */ Locator() { } /** Destructor */ virtual ~Locator() { } //@} /** @name The locator interface */ //@{ /** * Return the public identifier for the current document event. *This will be the public identifier * @return A string containing the public identifier, or * null if none is available. * @see #getSystemId */ virtual const XMLCh* getPublicId() const = 0; /** * Return the system identifier for the current document event. * *
If the system identifier is a URL, the parser must resolve it * fully before passing it to the application.
* * @return A string containing the system identifier, or null * if none is available. * @see #getPublicId */ virtual const XMLCh* getSystemId() const = 0; /** * Return the line number where the current document event ends. * Note that this is the line position of the first character * after the text associated with the document event. * @return The line number, or -1 if none is available. * @see #getColumnNumber */ virtual XMLSSize_t getLineNumber() const = 0; /** * Return the column number where the current document event ends. * Note that this is the column number of the first * character after the text associated with the document * event. The first column in a line is position 1. * @return The column number, or -1 if none is available. * @see #getLineNumber */ virtual XMLSSize_t getColumnNumber() const = 0; //@} private : /* Copy constructor */ Locator(const Locator&); /* Assignment operator */ Locator& operator=(const Locator&); }; XERCES_CPP_NAMESPACE_END #endif