org.uacalc.io
Class AlgebraReader

java.lang.Object
  org.xml.sax.helpers.DefaultHandler
      org.uacalc.io.AlgebraReader

All Implemented Interfaces:

org.xml.sax.ContentHandler, org.xml.sax.DTDHandler, org.xml.sax.EntityResolver, org.xml.sax.ErrorHandler

public final class AlgebraReader
extends org.xml.sax.helpers.DefaultHandler

XML reading. Eventually we will have "project" files with multiple algebras. For now we will have just single algebras.

Version:

$Id: AlgebraReader.java,v 1.9 2009/09/07 00:27:24 ralphfreese Exp $

Author:

Ralph Freese

Field Summary

static int	BASIC
static java.lang.String	EMPTY_STRING
static int	POWER
static int	PRODUCT
static int	QUOTIENT
static int	SUBALGEBRA

Constructor Summary

AlgebraReader(java.io.File file)

AlgebraReader(java.io.InputStream is)

AlgebraReader(java.lang.String file)

Method Summary

void	characters(char[] buf, int offset, int len) Since this is allowed to chunk the string in any way, we have to append the strings until we get to the end tag.
void	endElement(java.lang.String namespaceURI, java.lang.String lName, java.lang.String qName)
static void	main(java.lang.String[] args)
SmallAlgebra	readAlgebraFile()
SmallAlgebra	readAlgebraFromStream()
void	startElement(java.lang.String namespaceURI, java.lang.String lName, java.lang.String qName, org.xml.sax.Attributes attrs)

Methods inherited from class org.xml.sax.helpers.DefaultHandler

endDocument, endPrefixMapping, error, fatalError, ignorableWhitespace, notationDecl, processingInstruction, resolveEntity, setDocumentLocator, skippedEntity, startDocument, startPrefixMapping, unparsedEntityDecl, warning

Methods inherited from class java.lang.Object

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

Field Detail

BASIC

public static final int BASIC

See Also:

Constant Field Values

PRODUCT

public static final int PRODUCT

See Also:

Constant Field Values

QUOTIENT

public static final int QUOTIENT

See Also:

Constant Field Values

SUBALGEBRA

public static final int SUBALGEBRA

See Also:

Constant Field Values

POWER

public static final int POWER

See Also:

Constant Field Values

EMPTY_STRING

public static final java.lang.String EMPTY_STRING

See Also:

Constant Field Values

Constructor Detail

AlgebraReader

public AlgebraReader(java.io.File file)
              throws java.io.IOException

Throws:

java.io.IOException

AlgebraReader

public AlgebraReader(java.lang.String file)
              throws java.io.IOException

Throws:

java.io.IOException

AlgebraReader

public AlgebraReader(java.io.InputStream is)
              throws java.io.IOException

Throws:

java.io.IOException

Method Detail

readAlgebraFile

public SmallAlgebra readAlgebraFile()
                             throws java.io.IOException,
                                    org.xml.sax.SAXException,
                                    javax.xml.parsers.ParserConfigurationException

Throws:

java.io.IOException

org.xml.sax.SAXException

javax.xml.parsers.ParserConfigurationException

readAlgebraFromStream

public SmallAlgebra readAlgebraFromStream()
                                   throws java.io.IOException,
                                          org.xml.sax.SAXException,
                                          javax.xml.parsers.ParserConfigurationException

Throws:

java.io.IOException

org.xml.sax.SAXException

javax.xml.parsers.ParserConfigurationException

startElement

public void startElement(java.lang.String namespaceURI,
                         java.lang.String lName,
                         java.lang.String qName,
                         org.xml.sax.Attributes attrs)
                  throws org.xml.sax.SAXException

Specified by:

startElement in interface org.xml.sax.ContentHandler

Overrides:

startElement in class org.xml.sax.helpers.DefaultHandler

Throws:

org.xml.sax.SAXException

characters

public void characters(char[] buf,
                       int offset,
                       int len)
                throws org.xml.sax.SAXException

Since this is allowed to chunk the string in any way, we have to append the strings until we get to the end tag.

Specified by:

characters in interface org.xml.sax.ContentHandler

Overrides:

characters in class org.xml.sax.helpers.DefaultHandler

Throws:

org.xml.sax.SAXException

endElement

public void endElement(java.lang.String namespaceURI,
                       java.lang.String lName,
                       java.lang.String qName)
                throws org.xml.sax.SAXException

Specified by:

endElement in interface org.xml.sax.ContentHandler

Overrides:

endElement in class org.xml.sax.helpers.DefaultHandler

Throws:

org.xml.sax.SAXException

main

public static void main(java.lang.String[] args)
                 throws javax.xml.parsers.ParserConfigurationException,
                        org.xml.sax.SAXException,
                        java.io.IOException,
                        BadAlgebraFileException

Throws:

javax.xml.parsers.ParserConfigurationException

org.xml.sax.SAXException

java.io.IOException

BadAlgebraFileException