DocumentHandler.hpp
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- /*
- * The Apache Software License, Version 1.1
- *
- * Copyright (c) 1999-2000 The Apache Software Foundation. All rights
- * reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in
- * the documentation and/or other materials provided with the
- * distribution.
- *
- * 3. The end-user documentation included with the redistribution,
- * if any, must include the following acknowledgment:
- * "This product includes software developed by the
- * Apache Software Foundation (http://www.apache.org/)."
- * Alternately, this acknowledgment may appear in the software itself,
- * if and wherever such third-party acknowledgments normally appear.
- *
- * 4. The names "Xerces" and "Apache Software Foundation" must
- * not be used to endorse or promote products derived from this
- * software without prior written permission. For written
- * permission, please contact apache@apache.org.
- *
- * 5. Products derived from this software may not be called "Apache",
- * nor may "Apache" appear in their name, without prior written
- * permission of the Apache Software Foundation.
- *
- * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
- * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
- * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
- * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
- * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
- * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
- * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
- * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
- * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- * ====================================================================
- *
- * This software consists of voluntary contributions made by many
- * individuals on behalf of the Apache Software Foundation, and was
- * originally based on software copyright (c) 1999, International
- * Business Machines, Inc., http://www.ibm.com . For more information
- * on the Apache Software Foundation, please see
- * <http://www.apache.org/>.
- */
- /*
- * $Log: DocumentHandler.hpp,v $
- * Revision 1.3 2003/03/07 18:10:06 tng
- * Return a reference instead of void for operator=
- *
- * Revision 1.2 2002/11/04 14:56:25 tng
- * C++ Namespace Support.
- *
- * Revision 1.1.1.1 2002/02/01 22:22:08 peiyongz
- * sane_include
- *
- * Revision 1.6 2000/03/02 19:54:34 roddey
- * This checkin includes many changes done while waiting for the
- * 1.1.0 code to be finished. I can't list them all here, but a list is
- * available elsewhere.
- *
- * Revision 1.5 2000/02/24 20:12:55 abagchi
- * Swat for removing Log from API docs
- *
- * Revision 1.4 2000/02/12 03:31:55 rahulj
- * Removed duplicate CVS Log entries.
- *
- * Revision 1.3 2000/02/12 01:27:19 aruna1
- * Documentation updated
- *
- * Revision 1.2 2000/02/06 07:47:57 rahulj
- * Year 2K copyright swat.
- *
- * Revision 1.1.1.1 1999/11/09 01:07:43 twl
- * Initial checkin
- *
- * Revision 1.2 1999/11/08 20:44:54 rahul
- * Swat for adding in Product name and CVS comment log variable.
- *
- */
- #ifndef DOCUMENTHANDLER_HPP
- #define DOCUMENTHANDLER_HPP
- #include <xercesc/util/XercesDefs.hpp>
- XERCES_CPP_NAMESPACE_BEGIN
- class AttributeList;
- class Locator;
- /**
- * Receive notification of general document events.
- *
- * <p>This is the main interface that most SAX applications
- * implement: if the application needs to be informed of basic parsing
- * events, it implements this interface and registers an instance with
- * the SAX parser using the setDocumentHandler method. The parser
- * uses the instance to report basic document-related events like
- * the start and end of elements and character data.</p>
- *
- * <p>The order of events in this interface is very important, and
- * mirrors the order of information in the document itself. For
- * example, all of an element's content (character data, processing
- * instructions, and/or subelements) will appear, in order, between
- * the startElement event and the corresponding endElement event.</p>
- *
- * <p>Application writers who do not want to implement the entire
- * interface while can derive a class from HandlerBase, which implements
- * the default functionality; parser writers can instantiate
- * HandlerBase to obtain a default handler. The application can find
- * the location of any document event using the Locator interface
- * supplied by the Parser through the setDocumentLocator method.</p>
- *
- * @see Parser#setDocumentHandler
- * @see Locator#Locator
- * @see HandlerBase#HandlerBase
- */
- class SAX_EXPORT DocumentHandler
- {
- public:
- /** @name Constructors and Destructor */
- //@{
- /** Default constructor */
- DocumentHandler()
- {
- }
- /** Destructor */
- virtual ~DocumentHandler()
- {
- }
- //@}
- /** @name The virtual document handler interface */
- //@{
- /**
- * Receive notification of character data.
- *
- * <p>The Parser will call this method to report each chunk of
- * character data. SAX parsers may return all contiguous character
- * data in a single chunk, or they may split it into several
- * chunks; however, all of the characters in any single event
- * must come from the same external entity, so that the Locator
- * provides useful information.</p>
- *
- * <p>The application must not attempt to read from the array
- * outside of the specified range.</p>
- *
- * <p>Note that some parsers will report whitespace using the
- * ignorableWhitespace() method rather than this one (validating
- * parsers must do so).</p>
- *
- * @param chars The characters from the XML document.
- * @param length The number of characters to read from the array.
- * @exception SAXException Any SAX exception, possibly
- * wrapping another exception.
- * @see #ignorableWhitespace
- * @see Locator#Locator
- */
- virtual void characters
- (
- const XMLCh* const chars
- , const unsigned int length
- ) = 0;
- /**
- * Receive notification of the end of a document.
- *
- * <p>The SAX parser will invoke this method only once, and it will
- * be the last method invoked during the parse. The parser shall
- * not invoke this method until it has either abandoned parsing
- * (because of an unrecoverable error) or reached the end of
- * input.</p>
- *
- * @exception SAXException Any SAX exception, possibly
- * wrapping another exception.
- */
- virtual void endDocument () = 0;
- /**
- * Receive notification of the end of an element.
- *
- * <p>The SAX parser will invoke this method at the end of every
- * element in the XML document; there will be a corresponding
- * startElement() event for every endElement() event (even when the
- * element is empty).</p>
- *
- * <p>If the element name has a namespace prefix, the prefix will
- * still be attached to the name.</p>
- *
- * @param name The element type name
- * @exception SAXException Any SAX exception, possibly
- * wrapping another exception.
- */
- virtual void endElement(const XMLCh* const name) = 0;
- /**
- * Receive notification of ignorable whitespace in element content.
- *
- * <p>Validating Parsers must use this method to report each chunk
- * of ignorable whitespace (see the W3C XML 1.0 recommendation,
- * section 2.10): non-validating parsers may also use this method
- * if they are capable of parsing and using content models.</p>
- *
- * <p>SAX parsers may return all contiguous whitespace in a single
- * chunk, or they may split it into several chunks; however, all of
- * the characters in any single event must come from the same
- * external entity, so that the Locator provides useful
- * information.</p>
- *
- * <p>The application must not attempt to read from the array
- * outside of the specified range.</p>
- *
- * @param chars The characters from the XML document.
- * @param length The number of characters to read from the array.
- * @exception SAXException Any SAX exception, possibly
- * wrapping another exception.
- * @see #characters
- */
- virtual void ignorableWhitespace
- (
- const XMLCh* const chars
- , const unsigned int length
- ) = 0;
- /**
- * Receive notification of a processing instruction.
- *
- * <p>The Parser will invoke this method once for each processing
- * instruction found: note that processing instructions may occur
- * before or after the main document element.</p>
- *
- * <p>A SAX parser should never report an XML declaration (XML 1.0,
- * section 2.8) or a text declaration (XML 1.0, section 4.3.1)
- * using this method.</p>
- *
- * @param target The processing instruction target.
- * @param data The processing instruction data, or null if
- * none was supplied.
- * @exception SAXException Any SAX exception, possibly
- * wrapping another exception.
- */
- virtual void processingInstruction
- (
- const XMLCh* const target
- , const XMLCh* const data
- ) = 0;
- /**
- * Reset the Docuemnt object on its reuse
- *
- * <p>This method helps in reseting the document implementational
- * defaults each time the document is begun.</p>
- *
- */
- virtual void resetDocument() = 0;
- /**
- * Receive an object for locating the origin of SAX document events.
- *
- * SAX parsers are strongly encouraged (though not absolutely
- * required) to supply a locator: if it does so, it must supply
- * the locator to the application by invoking this method before
- * invoking any of the other methods in the DocumentHandler
- * interface.
- *
- * The locator allows the application to determine the end
- * position of any document-related event, even if the parser is
- * not reporting an error. Typically, the application will
- * use this information for reporting its own errors (such as
- * character content that does not match an application's
- * business rules). The information returned by the locator
- * is probably not sufficient for use with a search engine.
- *
- * Note that the locator will return correct information only
- * during the invocation of the events in this interface. The
- * application should not attempt to use it at any other time.
- *
- * @param locator An object that can return the location of
- * any SAX document event. The object is only
- * 'on loan' to the client code and they are not
- * to attempt to delete or modify it in any way!
- *
- * @see Locator#Locator
- */
- virtual void setDocumentLocator(const Locator* const locator) = 0;
- /**
- * Receive notification of the beginning of a document.
- *
- * <p>The SAX parser will invoke this method only once, before any
- * other methods in this interface or in DTDHandler (except for
- * setDocumentLocator).</p>
- *
- * @exception SAXException Any SAX exception, possibly
- * wrapping another exception.
- */
- virtual void startDocument() = 0;
- /**
- * Receive notification of the beginning of an element.
- *
- * <p>The Parser will invoke this method at the beginning of every
- * element in the XML document; there will be a corresponding
- * endElement() event for every startElement() event (even when the
- * element is empty). All of the element's content will be
- * reported, in order, before the corresponding endElement()
- * event.</p>
- *
- * <p>If the element name has a namespace prefix, the prefix will
- * still be attached. Note that the attribute list provided will
- * contain only attributes with explicit values (specified or
- * defaulted): #IMPLIED attributes will be omitted.</p>
- *
- * @param name The element type name.
- * @param attrs The attributes attached to the element, if any.
- * @exception SAXException Any SAX exception, possibly
- * wrapping another exception.
- * @see #endElement
- * @see AttributeList#AttributeList
- */
- virtual void startElement
- (
- const XMLCh* const name
- , AttributeList& attrs
- ) = 0;
- //@}
- private :
- /* Unimplemented Constructors and operators */
- /* Copy constructor */
- DocumentHandler(const DocumentHandler&);
- /** Assignment operator */
- DocumentHandler& operator=(const DocumentHandler&);
- };
- XERCES_CPP_NAMESPACE_END
- #endif