com.microstar.xml
Class SAXDriver

java.lang.Object
  |
  +--com.microstar.xml.SAXDriver

public class SAXDriver

extends java.lang.Object

implements XmlHandler, Locator, AttributeList, Parser

A SAX driver for Microstar's Ælfred XML parser.

This driver acts as a front-end for Ælfred, and translates Ælfred's events into SAX events. It implements the SAX parser interface, and you can use it without directly calling Ælfred at all:

 org.xml.sax.Parser parser = new com.microstar.xml.SAXDriver();
 

When you are using SAX, you do not need to use the XmlParser or XmlHandler classes at all: this class is your entry point.

This driver is based on the 1.0gamma version of SAX, available from http://www.megginson.com/SAX/

Version:

1.1

Author:

Copyright (c) 1998 by Microstar Software Ltd., written by David Megginson <dmeggins@microstar.com>

See Also:

Parser, XmlParser

Field Summary

private java.util.Vector	attributeNames
private java.util.Vector	attributeValues
private HandlerBase	base
private DocumentHandler	documentHandler
private DTDHandler	dtdHandler
private java.lang.String	elementName
private EntityResolver	entityResolver
private java.util.Stack	entityStack
private ErrorHandler	errorHandler
private XmlParser	parser
private boolean	seenDTDEvents

Constructor Summary

SAXDriver()

Method Summary

void	attribute(java.lang.String aname, java.lang.String value, boolean isSpecified) Implement com.microstar.xml.XmlHandler#attribute.
void	charData(char[] ch, int start, int length) Implement com.microstar.xml.XmlHandler#charData.
private void	closeStreams(InputSource source) Close any streams provided.
private void	deliverDTDEvents() Before the first startElement event, deliver all notation and unparsed entity declarations.
void	doctypeDecl(java.lang.String name, java.lang.String publicId, java.lang.String systemId) Implement com.microstar.xml.XmlHandler#doctypeDecl.
void	endDocument() Implement com.microstar.xml.XmlHandler#endDocument.
void	endElement(java.lang.String elname) Implement com.microstar.xml.XmlHandler#endElement.
void	endExternalEntity(java.lang.String systemId) Implement com.microstar.xml.XmlHandler#endExternalEntity.
void	error(java.lang.String message, java.lang.String url, int line, int column) Implement com.microstar.xml.XmlHandler#error.
int	getColumnNumber() Return the column number where the current document event ends.
int	getLength() Return the number of attributes in this list.
int	getLineNumber() Return the line number where the current document event ends.
java.lang.String	getName(int i) Return the name of an attribute in this list (by position).
java.lang.String	getPublicId() Return the public identifier for the current document event.
java.lang.String	getSystemId() Return the system identifier for the current document event.
java.lang.String	getType(int i) Return the type of an attribute in the list (by position).
java.lang.String	getType(java.lang.String name) Return the type of an attribute in the list (by name).
java.lang.String	getValue(int i) Return the value of an attribute in the list (by position).
java.lang.String	getValue(java.lang.String name) Return the value of an attribute in the list (by name).
void	ignorableWhitespace(char[] ch, int start, int length) Implement com.microstar.xml.XmlHandler#ignorableWhitespace.
void	parse(InputSource source) Parse a document.
void	parse(java.lang.String systemId) Parse an XML document from a system identifier (URI).
void	processingInstruction(java.lang.String target, java.lang.String data) Implement com.microstar.xml.XmlHandler#processingInstruction.
java.lang.Object	resolveEntity(java.lang.String publicId, java.lang.String systemId) Implement com.microstar.xml.XmlHandler.resolveSystemId
void	setDocumentHandler(DocumentHandler handler) Set the document handler for this parser.
void	setDTDHandler(DTDHandler handler) Set the DTD handler for this parser.
void	setEntityResolver(EntityResolver resolver) Set the entity resolver for this parser.
void	setErrorHandler(ErrorHandler handler) Set the error handler for this parser.
void	setLocale(java.util.Locale locale) Set the locale.
void	startDocument() Implement com.microstar.xml.XmlHandler#startDocument.
void	startElement(java.lang.String elname) Implement com.microstar.xml.XmlHandler#startElement.
void	startExternalEntity(java.lang.String systemId) Implement com.microstar.xml.XmlHandler#startExternalEntity.

Methods inherited from class java.lang.Object

, clone, equals, finalize, getClass, hashCode, notify, notifyAll, registerNatives, toString, wait, wait, wait

Field Detail

base

private HandlerBase base

parser

private XmlParser parser

seenDTDEvents

private boolean seenDTDEvents

entityResolver

private EntityResolver entityResolver

dtdHandler

private DTDHandler dtdHandler

documentHandler

private DocumentHandler documentHandler

errorHandler

private ErrorHandler errorHandler

elementName

private java.lang.String elementName

entityStack

private java.util.Stack entityStack

attributeNames

private java.util.Vector attributeNames

attributeValues

private java.util.Vector attributeValues

Constructor Detail

SAXDriver

public SAXDriver()

Method Detail

setLocale

public void setLocale(java.util.Locale locale)
               throws SAXException

Set the locale.

Specified by:

setLocale in interface Parser

See Also:

Parser.setLocale(java.util.Locale)

setEntityResolver

public void setEntityResolver(EntityResolver resolver)

Set the entity resolver for this parser.

Specified by:

setEntityResolver in interface Parser

Parameters:

handler - The object to receive entity events.

See Also:

Parser.setEntityResolver(org.xml.sax.EntityResolver)

setDTDHandler

public void setDTDHandler(DTDHandler handler)

Set the DTD handler for this parser.

Specified by:

setDTDHandler in interface Parser

Parameters:

handler - The object to receive DTD events.

See Also:

Parser.setDTDHandler(org.xml.sax.DTDHandler)

setDocumentHandler

public void setDocumentHandler(DocumentHandler handler)

Set the document handler for this parser.

Specified by:

setDocumentHandler in interface Parser

Parameters:

handler - The object to receive document events.

See Also:

Parser.setDocumentHandler(org.xml.sax.DocumentHandler)

setErrorHandler

public void setErrorHandler(ErrorHandler handler)

Set the error handler for this parser.

Specified by:

setErrorHandler in interface Parser

Parameters:

handler - The object to receive error events.

See Also:

Parser.setErrorHandler(org.xml.sax.ErrorHandler)

parse

public void parse(InputSource source)
           throws SAXException

Parse a document.

If you want anything useful to happen, you should set at least one type of handler.

Specified by:

parse in interface Parser

Parameters:

source - The XML input source.

Throws:

SAXException - The handlers may throw any exception.

See Also:

Parser.parse(InputSource), setEntityResolver(org.xml.sax.EntityResolver), setDTDHandler(org.xml.sax.DTDHandler), setDocumentHandler(org.xml.sax.DocumentHandler), setErrorHandler(org.xml.sax.ErrorHandler)

parse

public void parse(java.lang.String systemId)
           throws SAXException

Parse an XML document from a system identifier (URI).

Specified by:

parse in interface Parser

See Also:

Parser.parse(String)

closeStreams

private void closeStreams(InputSource source)
                   throws java.io.IOException

Close any streams provided.

startDocument

public void startDocument()
                   throws SAXException

Implement com.microstar.xml.XmlHandler#startDocument.

Translate to the SAX interface.

Users should never invoke this method directly.

Specified by:

startDocument in interface XmlHandler

Throws:

SAXException - May throw any exception.

See Also:

XmlHandler.startDocument()

endDocument

public void endDocument()
                 throws SAXException

Implement com.microstar.xml.XmlHandler#endDocument.

Translate to the SAX interface.

Users should never invoke this method directly.

Specified by:

endDocument in interface XmlHandler

Throws:

SAXException - May throw any exception.

See Also:

XmlHandler.endDocument()

resolveEntity

public java.lang.Object resolveEntity(java.lang.String publicId,
                                      java.lang.String systemId)
                               throws SAXException,
                                      java.io.IOException

Implement com.microstar.xml.XmlHandler.resolveSystemId

Translate to the SAX interface.

Users should never invoke this method directly.

Specified by:

resolveEntity in interface XmlHandler

Throws:

SAXException - May throw any exception.

See Also:

XmlHandler.resolveEntity(java.lang.String, java.lang.String)

startExternalEntity

public void startExternalEntity(java.lang.String systemId)
                         throws SAXException

Implement com.microstar.xml.XmlHandler#startExternalEntity.

Translate to the SAX interface.

Users should never invoke this method directly.

Specified by:

startExternalEntity in interface XmlHandler

Throws:

SAXException - May throw any exception.

See Also:

XmlHandler.startExternalEntity(java.lang.String)

endExternalEntity

public void endExternalEntity(java.lang.String systemId)
                       throws SAXException

Implement com.microstar.xml.XmlHandler#endExternalEntity.

Translate to the SAX interface.

Users should never invoke this method directly.

Specified by:

endExternalEntity in interface XmlHandler

Throws:

SAXException - May throw any exception.

See Also:

XmlHandler.endExternalEntity(java.lang.String)

doctypeDecl

public void doctypeDecl(java.lang.String name,
                        java.lang.String publicId,
                        java.lang.String systemId)
                 throws SAXException

Implement com.microstar.xml.XmlHandler#doctypeDecl.

Translate to the SAX interface.

Users should never invoke this method directly.

Specified by:

doctypeDecl in interface XmlHandler

Throws:

SAXException - May throw any exception.

See Also:

XmlHandler.doctypeDecl(java.lang.String, java.lang.String, java.lang.String)

attribute

public void attribute(java.lang.String aname,
                      java.lang.String value,
                      boolean isSpecified)
               throws SAXException

Implement com.microstar.xml.XmlHandler#attribute.

Translate to the SAX interface.

Users should never invoke this method directly.

Specified by:

attribute in interface XmlHandler

Throws:

SAXException - May throw any exception.

See Also:

XmlHandler.attribute(java.lang.String, java.lang.String, boolean)

startElement

public void startElement(java.lang.String elname)
                  throws SAXException

Implement com.microstar.xml.XmlHandler#startElement.

Translate to the SAX interface.

Users should never invoke this method directly.

Specified by:

startElement in interface XmlHandler

Throws:

SAXException - May throw any exception.

See Also:

XmlHandler.startElement(java.lang.String)

endElement

public void endElement(java.lang.String elname)
                throws SAXException

Implement com.microstar.xml.XmlHandler#endElement.

Translate to the SAX interface.

Users should never invoke this method directly.

Specified by:

endElement in interface XmlHandler

Throws:

SAXException - May throw any exception.

See Also:

XmlHandler.endElement(java.lang.String)

charData

public void charData(char[] ch,
                     int start,
                     int length)
              throws SAXException

Implement com.microstar.xml.XmlHandler#charData.

Translate to the SAX interface.

Users should never invoke this method directly.

Specified by:

charData in interface XmlHandler

Throws:

SAXException - May throw any exception.

See Also:

XmlHandler.charData(char[], int, int)

ignorableWhitespace

public void ignorableWhitespace(char[] ch,
                                int start,
                                int length)
                         throws SAXException

Implement com.microstar.xml.XmlHandler#ignorableWhitespace.

Translate to the SAX interface.

Users should never invoke this method directly.

Specified by:

ignorableWhitespace in interface XmlHandler

Throws:

SAXException - May throw any exception.

See Also:

XmlHandler.ignorableWhitespace(char[], int, int)

processingInstruction

public void processingInstruction(java.lang.String target,
                                  java.lang.String data)
                           throws SAXException

Implement com.microstar.xml.XmlHandler#processingInstruction.

Translate to the SAX interface.

Users should never invoke this method directly.

Specified by:

processingInstruction in interface XmlHandler

Throws:

SAXException - May throw any exception.

See Also:

XmlHandler.processingInstruction(java.lang.String, java.lang.String)

error

public void error(java.lang.String message,
                  java.lang.String url,
                  int line,
                  int column)
           throws SAXException

Implement com.microstar.xml.XmlHandler#error.

Translate to the SAX interface.

Users should never invoke this method directly.

Specified by:

error in interface XmlHandler

Throws:

SAXException - May throw any exception.

See Also:

XmlHandler.error(java.lang.String, java.lang.String, int, int)

deliverDTDEvents

private void deliverDTDEvents()
                       throws SAXException

Before the first startElement event, deliver all notation and unparsed entity declarations.

getLength

public int getLength()

Description copied from interface: AttributeList

Return the number of attributes in this list.

The SAX parser may provide attributes in any arbitrary order, regardless of the order in which they were declared or specified. The number of attributes may be zero.

Specified by:

getLength in interface AttributeList

Tags copied from interface: AttributeList

Returns:

The number of attributes in the list.

getName

public java.lang.String getName(int i)

Description copied from interface: AttributeList

Return the name of an attribute in this list (by position).

The names must be unique: the SAX parser shall not include the same attribute twice. Attributes without values (those declared #IMPLIED without a value specified in the start tag) will be omitted from the list.

If the attribute name has a namespace prefix, the prefix will still be attached.

Specified by:

getName in interface AttributeList

Tags copied from interface: AttributeList

Parameters:

i - The index of the attribute in the list (starting at 0).

Returns:

The name of the indexed attribute, or null if the index is out of range.

See Also:

AttributeList.getLength()

getType

public java.lang.String getType(int i)

Description copied from interface: AttributeList

Return the type of an attribute in the list (by position).

The attribute type is one of the strings "CDATA", "ID", "IDREF", "IDREFS", "NMTOKEN", "NMTOKENS", "ENTITY", "ENTITIES", or "NOTATION" (always in upper case).

If the parser has not read a declaration for the attribute, or if the parser does not report attribute types, then it must return the value "CDATA" as stated in the XML 1.0 Recommentation (clause 3.3.3, "Attribute-Value Normalization").

For an enumerated attribute that is not a notation, the parser will report the type as "NMTOKEN".

Specified by:

getType in interface AttributeList

Tags copied from interface: AttributeList

Parameters:

i - The index of the attribute in the list (starting at 0).

Returns:

The attribute type as a string, or null if the index is out of range.

See Also:

AttributeList.getLength(), AttributeList.getType(java.lang.String)

getValue

public java.lang.String getValue(int i)

Description copied from interface: AttributeList

Return the value of an attribute in the list (by position).

If the attribute value is a list of tokens (IDREFS, ENTITIES, or NMTOKENS), the tokens will be concatenated into a single string separated by whitespace.

Specified by:

getValue in interface AttributeList

Tags copied from interface: AttributeList

Parameters:

i - The index of the attribute in the list (starting at 0).

Returns:

The attribute value as a string, or null if the index is out of range.

See Also:

AttributeList.getLength(), AttributeList.getValue(java.lang.String)

getType

public java.lang.String getType(java.lang.String name)

Description copied from interface: AttributeList

Return the type of an attribute in the list (by name).

The return value is the same as the return value for getType(int).

If the attribute name has a namespace prefix in the document, the application must include the prefix here.

Specified by:

getType in interface AttributeList

Tags copied from interface: AttributeList

Parameters:

name - The name of the attribute.

Returns:

The attribute type as a string, or null if no such attribute exists.

See Also:

AttributeList.getType(int)

getValue

public java.lang.String getValue(java.lang.String name)

Description copied from interface: AttributeList

Return the value of an attribute in the list (by name).

The return value is the same as the return value for getValue(int).

If the attribute name has a namespace prefix in the document, the application must include the prefix here.

Specified by:

getValue in interface AttributeList

Tags copied from interface: AttributeList

Parameters:

i - The index of the attribute in the list.

Returns:

The attribute value as a string, or null if no such attribute exists.

See Also:

AttributeList.getValue(int)

getPublicId

public java.lang.String getPublicId()

Description copied from interface: Locator

Return the public identifier for the current document event.

This will be the public identifier

Specified by:

getPublicId in interface Locator

Tags copied from interface: Locator

Returns:

A string containing the public identifier, or null if none is available.

See Also:

Locator.getSystemId()

getSystemId

public java.lang.String getSystemId()

Description copied from interface: Locator

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.

Specified by:

getSystemId in interface Locator

Tags copied from interface: Locator

Returns:

A string containing the system identifier, or null if none is available.

See Also:

Locator.getPublicId()

getLineNumber

public int getLineNumber()

Description copied from interface: Locator

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.

Specified by:

getLineNumber in interface Locator

Tags copied from interface: Locator

Returns:

The line number, or -1 if none is available.

See Also:

Locator.getColumnNumber()

getColumnNumber

public int getColumnNumber()

Description copied from interface: Locator

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.

Specified by:

getColumnNumber in interface Locator

Tags copied from interface: Locator

Returns:

The column number, or -1 if none is available.

See Also:

Locator.getLineNumber()