Serial Access XML Parser. More...

#include <yatexml.h>

Inheritance diagram for XmlSaxParser:

Public Types
enum	Error { NoError = 0, NotWellFormed, Unknown, IOError, ElementParse, ReadElementName, InvalidElementName, ReadingAttributes, CommentParse, DeclarationParse, DefinitionParse, CDataParse, ReadingEndTag, Incomplete, InvalidEncoding, UnsupportedEncoding, UnsupportedVersion }

enum	Type { None = 0, Text = 1, CData = 2, Element = 3, Doctype = 4, Comment = 5, Declaration = 6, Instruction = 7, EndTag = 8, Special = 9 }

Public Member Functions
virtual	~XmlSaxParser ()

unsigned int	offset () const

unsigned int	row () const

unsigned int	column () const

const String &	buffer () const

bool	parse (const char *data)

bool	completeText ()

Error	error ()

bool	setError (Error error, XmlChild *child=0)

const char *	getError (const char *defVal="Xml error")

Type	unparsed ()

void	setUnparsed (Type id)

virtual void	reset ()

const String &	getBuffer () const

Public Member Functions inherited from DebugEnabler
	DebugEnabler (int level=TelEngine::debugLevel(), bool enabled=true)

int	debugLevel () const

int	debugLevel (int level)

bool	debugEnabled () const

void	debugEnabled (bool enable)

const char *	debugName () const

bool	debugAt (int level) const

bool	debugChained () const

void	debugChain (const DebugEnabler *chain=0)

void	debugCopy (const DebugEnabler *original=0)

Static Public Member Functions
static const char *	getError (int code, const char *defVal="Xml error")

static bool	blank (char c)

static bool	checkFirstNameCharacter (unsigned char ch)

static bool	checkDataChar (unsigned char c)

static bool	checkNameCharacter (unsigned char ch)

static bool	validTag (const String &buf)

static void	escape (String &buf, const String &text)

Static Public Attributes
static const TokenDict	s_errorString []

static const XmlEscape	s_escape []

Protected Member Functions
	XmlSaxParser (const char *name="XmlSaxParser")

bool	parseInstruction ()

bool	parseCData ()

bool	parseComment ()

bool	parseElement ()

bool	parseDeclaration ()

bool	parseSpecial ()

bool	parseEndTag ()

bool	parseDoctype ()

bool	auxParse ()

void	unEscape (String &text)

void	skipBlanks ()

bool	badCharacter (char c)

void	resetError ()

void	resetParsed ()

String *	extractName (bool &empty)

NamedString *	getAttribute ()

virtual void	gotComment (const String &text)

virtual void	gotProcessing (const NamedString &instr)

virtual void	gotDeclaration (const NamedList &decl)

virtual void	gotText (const String &text)

virtual void	gotCdata (const String &data)

virtual void	gotElement (const NamedList &element, bool empty)

virtual void	endElement (const String &name)

virtual void	gotDoctype (const String &doc)

virtual bool	completed ()

bool	processElement (NamedList &list, bool empty)

bool	processText (String &text)

Protected Member Functions inherited from DebugEnabler
void	debugName (const char *name)

Protected Attributes
unsigned int	m_offset

unsigned int	m_row

unsigned int	m_column

Error	m_error

String	m_buf

NamedList	m_parsed

Type	m_unparsed

Detailed Description

Serial Access XML Parser.

A Serial Access Parser (SAX) for arbitrary XML data

Constructor & Destructor Documentation

virtual ~XmlSaxParser ( )

virtual

Destructor

XmlSaxParser ( const char * name = "XmlSaxParser" )

protected

Constructor

Parameters

name	Debug name

Member Function Documentation

bool auxParse ( )

protected

Parse an unfinished xml object. Extracts the parsed string from buffer if returns true

Returns: True if the object was parsed successfully

bool badCharacter ( char c )

inlineprotected

Check if a character is an angle bracket

Parameters

c	The character to verify

Returns: True if c is an angle bracket

static bool blank ( char c )

inlinestatic

Check if the given character is blank

Parameters

c	The character to verify

Returns: True if c is blank

const String& buffer ( ) const

inline

Retrieve the parser's buffer

Returns: The parser's buffer

References XmlSaxParser::m_buf.

static bool checkDataChar ( unsigned char c )

static

Check if the given character is in the range allowed for an xml char

Parameters

c	The character to check

Returns: True if the character is in range

static bool checkFirstNameCharacter ( unsigned char ch )

static

Verify if the given character is in the range allowed to be first character from a xml tag

Parameters

ch	The character to check

Returns: True if the character is in range

static bool checkNameCharacter ( unsigned char ch )

static

Verify if the given character is in the range allowed for a xml name

Parameters

ch	The character to check

Returns: True if the character is in range

unsigned int column ( ) const

inline

Get the column where the parser has found an error

Returns: The column number

References XmlSaxParser::m_column.

virtual bool completed ( )

inlineprotectedvirtual

Callback method. Is called to check if we have an incomplete element. Default implementation returns always true

Returns: True

Reimplemented in XmlDomParser.

bool completeText ( )

Process incomplete text if the parser is completed. This method should be called to complete text after all data was pushed into the parser

Returns: True if all data was successfully parsed

virtual void endElement ( const String & name )

inlineprotectedvirtual

Callback method. Is called when a end tag was successfully parsed. Default implementation does nothing

Parameters

name	The end tag name

Reimplemented in XmlDomParser.

Error error ( )

inline

Get the error code found while parsing

Returns: Error code

References XmlSaxParser::m_error.

static void escape	(	String &	buf,
		const String &	text
	)

static

XmlEscape the given text

Parameters

buf	Destination buffer
text	The text to escape

String* extractName ( bool & empty )

protected

Extract the name of an element or instruction

Returns: The extracted string or 0

NamedString* getAttribute ( )

protected

Extract an attribute

Returns: The attribute value or 0

const String& getBuffer ( ) const

inline

Returns: The internal buffer

References XmlSaxParser::m_buf.

const char* getError ( const char * defVal = "Xml error" )

inline

Retrieve the error string associated with current error status

Parameters

defVal Value to return if not found

Returns: The error string

References XmlSaxParser::m_error.

static const char* getError	(	int	code,
		const char *	defVal = `"Xml error"`
	)

inlinestatic

Retrieve the error string associated with a given error code

Parameters

code	Code of the error to look up
defVal	Value to return if not found

Returns: The error string

References TelEngine::lookup(), and XmlSaxParser::s_errorString.

virtual void gotCdata ( const String & data )

inlineprotectedvirtual

Callback method. Is called when a CData section was successfully parsed. Default implementation does nothing

Parameters

data	The CData content

Reimplemented in XmlDomParser.

virtual void gotComment ( const String & text )

inlineprotectedvirtual

Callback method. Is called when a comment was successfully parsed. Default implementation does nothing

Parameters

text	The comment content

Reimplemented in XmlDomParser.

virtual void gotDeclaration ( const NamedList & decl )

inlineprotectedvirtual

Callback method. Is called when a declaration was successfully parsed. Default implementation does nothing

Parameters

decl	The declaration content

Reimplemented in XmlDomParser.

virtual void gotDoctype ( const String & doc )

inlineprotectedvirtual

Callback method. Is called when a doctype was successfully parsed. Default implementation does nothing

Parameters

doc	The doctype content

Reimplemented in XmlDomParser.

virtual void gotElement	(	const NamedList &	element,
		bool	empty
	)

inlineprotectedvirtual

Callback method. Is called when an element was successfully parsed. Default implementation does nothing

Parameters

element	The element content
empty	True if the element does not have attributes

Reimplemented in XmlDomParser.

virtual void gotProcessing ( const NamedString & instr )

inlineprotectedvirtual

Callback method. Is called when an instruction was successfully parsed. Default implementation does nothing

Parameters

instr The instruction content

Reimplemented in XmlDomParser.

virtual void gotText ( const String & text )

inlineprotectedvirtual

Callback method. Is called when a text was successfully parsed. Default implementation does nothing

Parameters

text	The text content

Reimplemented in XmlDomParser.

unsigned int offset ( ) const

inline

Get the number of bytes successfully parsed

Returns: The number of bytes successfully parsed

References XmlSaxParser::m_offset.

bool parse ( const char * data )

Parse a given string

Parameters

data	The data to parse

Returns: True if all data was successfully parsed

bool parseCData ( )

protected

Parse a CData section form the main buffer. Extracts the parsed string from buffer if returns true

Returns: True if the CData section was parsed successfully

bool parseComment ( )

protected

Parse a comment form the main buffer. Extracts the parsed string from buffer if returns true

Returns: True if the comment was parsed successfully

bool parseDeclaration ( )

protected

Parse a declaration form the main buffer. Extracts the parsed string from buffer if returns true

Returns: True if the declaration was parsed successfully

bool parseDoctype ( )

protected

Parse a doctype form the main buffer. Extracts the parsed string from buffer if returns true. Warning: This is a stub implementation

Returns: True if the doctype was parsed successfully

bool parseElement ( )

protected

Parse an element form the main buffer. Extracts the parsed string from buffer if returns true

Returns: True if the element was parsed successfully

bool parseEndTag ( )

protected

Parse an endtag form the main buffer. Extracts the parsed string from buffer if returns true

Returns: True if the endtag was parsed successfully

bool parseInstruction ( )

protected

Parse an instruction form the main buffer. Extracts the parsed string from buffer if returns true

Returns: True if the instruction was parsed successfully

bool parseSpecial ( )

protected

Helper method to classify the Xml objects starting with "<!" sequence. Extracts the parsed string from buffer if returns true

Returns: True if a corresponding xml object was found and parsed successfully

bool processElement	(	NamedList &	list,
		bool	empty
	)

protected

Calls gotElement() and eset parsed on success

Parameters

list	The list element and its attributes
empty	True if the element does not have attributes

Returns: True if there is no error

bool processText ( String & text )

protected

Unescape text, call gotText() and reset parsed on success

Parameters

text	The text to process

Returns: True if there is no error

virtual void reset ( )

virtual

Reset error flag

Reimplemented in XmlDomParser.

void resetError ( )

inlineprotected

Reset the error

References XmlSaxParser::m_error.

void resetParsed ( )

inlineprotected

Reset parsed value and parameters

References String::clear(), NamedList::clearParams(), and XmlSaxParser::m_parsed.

unsigned int row ( ) const

inline

Get the row where the parser has found an error

Returns: The row number

References XmlSaxParser::m_row.

bool setError	(	Error	error,
		XmlChild *	child = `0`
	)

Set the error code and destroys a child if error code is not NoError

Parameters

error	The error found
child	Child to destroy

Returns: False on error

void setUnparsed ( Type id )

inline

Set the last xml type that we were parsing, but we have not finished

Parameters

id	The xml type that we haven't finish to parse

References XmlSaxParser::m_unparsed.

void skipBlanks ( )

protected

Remove blank characters from the begining of the buffer

void unEscape ( String & text )

protected

Unescape the given text. Handled: < > ' " & &#DecimalNumber; &#xHexNumber;

Parameters

text	The requested text to unescape

Type unparsed ( )

inline

Returns: The last xml type that we were parsing, but we have not finished

References XmlSaxParser::m_unparsed.

static bool validTag ( const String & buf )

static

Check if a given string is a valid xml tag name

Parameters

buf	The string to check

Returns: True if the string is a valid xml tag name

Member Data Documentation

String m_buf

protected

The main buffer

Referenced by XmlSaxParser::buffer(), and XmlSaxParser::getBuffer().

unsigned int m_column

protected

The column where the parser was stop

Referenced by XmlSaxParser::column().

Error m_error

protected

The error code found while parsing data

Referenced by XmlSaxParser::error(), XmlSaxParser::getError(), and XmlSaxParser::resetError().

unsigned int m_offset

protected

The offset where the parser was stop

Referenced by XmlSaxParser::offset().

NamedList m_parsed

protected

The parser data holder. Keeps the parsed data when an incomplete xml object is found

Referenced by XmlSaxParser::resetParsed().

unsigned int m_row

protected

The row where the parser was stop

Referenced by XmlSaxParser::row().

Type m_unparsed

protected

The last parsed xml object code

Referenced by XmlSaxParser::setUnparsed(), and XmlSaxParser::unparsed().

const TokenDict s_errorString[]

static

Errors dictionary

Referenced by XmlSaxParser::getError().

const XmlEscape s_escape[]

static

Escaped strings dictionary

The documentation for this class was generated from the following file:

yatexml.h

Public Types

Public Member Functions

Static Public Member Functions

Static Public Attributes

Protected Member Functions

Protected Attributes

Detailed Description

Constructor & Destructor Documentation

Member Function Documentation

Member Data Documentation