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com.tangosol.run.xml
Class SimpleParser

java.lang.Object
com.tangosol.util.Base
com.tangosol.run.xml.SimpleParser

public class SimpleParser

extends Base

This class uses the XmlTokenizer to produce an XmlDocument from XML text.

Version:

1.00, 2001.07.16

Author:

Cameron Purdy

Field Summary

protected boolean	m_fValidate If true, validate XML if it contains an XSD reference
protected com.tangosol.run.xml.XmlToken	m_token The "current" token being evaluated.
protected com.tangosol.run.xml.XmlTokenizer	m_toker The lexical tokenizer.

Constructor Summary

SimpleParser()
Construct an XML SimpleParser.

SimpleParser(boolean fValidate)
Construct an XML SimpleParser.

Method Summary

protected com.tangosol.run.xml.XmlToken	current() Returns the current token and advances to the next token.
protected boolean	hasCurrent() Determine if there is a current token.
protected boolean	hasNext() Determine if there is a next token.
protected void	init() Internal initialization.
protected XmlDocument	instantiateDocument() Factory method to instantiate an XmlDocument implementation.
static void	main(java.lang.String[] asArgs) Unit test.
protected com.tangosol.run.xml.XmlToken	mark() Marks the current position and returns it as a token.
protected com.tangosol.run.xml.XmlToken	match(int id) Verifies that the current token matches the passed token id and, if so, advances to the next token.
protected com.tangosol.run.xml.XmlToken	match(java.lang.String sName) Verifies that the current token is a name token whose name matches the passed String and, if so, advances to the next token.
protected com.tangosol.run.xml.XmlToken	next() Advances to and returns the next token.
protected void	parseComment(XmlElement xml)
protected void	parseComment(XmlElement xml, boolean fIsDocument)
protected void	parseDoctype(XmlDocument xml)
protected void	parseDocument(XmlDocument xml) Factory method to instantiate an XmlDocument implementation.
protected void	parseElement(XmlElement xml) Note: '<' and element name have already been parsed
protected void	parseMisc(XmlElement xml)
protected void	parsePi(XmlElement xml)
protected void	parsePi(XmlElement xml, boolean fXmlDeclAllowed)
XmlDocument	parseXml(java.io.InputStream stream) Parse the specified InputStream into an XmlDocument object.
XmlDocument	parseXml(java.io.InputStream stream, java.lang.String sCharset) Parse the specified InputStream into an XmlDocument object using the specified charset.
XmlDocument	parseXml(java.io.Reader reader) Parse the specified Reader into an XmlDocument object.
XmlDocument	parseXml(java.lang.String sXml) Parse the specified String into an XmlDocument object.
XmlDocument	parseXml(java.lang.String sXml, XmlDocument xml) Parse the passed script.
protected void	parseXmlDecl(XmlDocument xml)
protected com.tangosol.run.xml.XmlToken	peek(int id) Tests if the current token matches the passed token id and, if so, advances to the next token.
protected com.tangosol.run.xml.XmlToken	peek(int cat, int subcat) Tests if the current token matches the passed token category and sub-category.
protected com.tangosol.run.xml.XmlToken	peek(java.lang.String sName) Tests if the current token is a name that matches the passed String and, if so, advances to the next token.
protected java.io.InputStream	skipBOM(java.io.InputStream in) Read the provided InputStream to determine if the stream starts with a UTF-8 BOM (http://www.unicode.org/faq/utf_bom.html#BOM).

Field Detail

m_fValidate

protected final boolean m_fValidate

If true, validate XML if it contains an XSD reference

m_toker

protected com.tangosol.run.xml.XmlTokenizer m_toker

The lexical tokenizer.

m_token

protected com.tangosol.run.xml.XmlToken m_token

The "current" token being evaluated.

Constructor Detail

SimpleParser

public SimpleParser()

Construct an XML SimpleParser. If the XML contains an XSD reference, the parser will validate using the provided XSD.

SimpleParser

public SimpleParser(boolean fValidate)

Construct an XML SimpleParser.

Parameters:

fValidate - if true, validate XML if it contains an XSD reference

Method Detail

init

protected void init()

Internal initialization.

parseXml

public XmlDocument parseXml(java.lang.String sXml)
                     throws java.io.IOException

Parse the specified String into an XmlDocument object.

Parameters:

sXml - the String to parse

Returns:

an XmlDocument object

Throws:

java.io.IOException

parseXml

public XmlDocument parseXml(java.io.Reader reader)
                     throws java.io.IOException

Parse the specified Reader into an XmlDocument object.

Parameters:

reader - the Reader object

Returns:

an XmlDocument object

Throws:

java.io.IOException

parseXml

public XmlDocument parseXml(java.io.InputStream stream)
                     throws java.io.IOException

Parse the specified InputStream into an XmlDocument object.

Parameters:

stream - the InputStream object

Returns:

an XmlDocument object

Throws:

java.io.IOException

parseXml

public XmlDocument parseXml(java.io.InputStream stream,
                            java.lang.String sCharset)
                     throws java.io.IOException

Parse the specified InputStream into an XmlDocument object using the specified charset.

Parameters:

stream - the InputStream object

sCharset - the charset name

Returns:

an XmlDocument object

Throws:

java.io.IOException

parseXml

public XmlDocument parseXml(java.lang.String sXml,
                            XmlDocument xml)
                     throws java.io.IOException

Parse the passed script.

Parameters:

sXml - the script to parse (as a string)

xml - the XML document object to parse into

Throws:

java.io.IOException

instantiateDocument

protected XmlDocument instantiateDocument()

Factory method to instantiate an XmlDocument implementation.

Returns:

an object implementing XmlDocument

main

public static void main(java.lang.String[] asArgs)

Unit test.

parseDocument

protected void parseDocument(XmlDocument xml)
                      throws com.tangosol.dev.compiler.CompilerException

Factory method to instantiate an XmlDocument implementation.

Parameters:

xml - a blank XmlDocument

Throws:

com.tangosol.dev.compiler.CompilerException

parsePi

protected void parsePi(XmlElement xml)
                throws com.tangosol.dev.compiler.CompilerException

Throws:

com.tangosol.dev.compiler.CompilerException

parsePi

protected void parsePi(XmlElement xml,
                       boolean fXmlDeclAllowed)
                throws com.tangosol.dev.compiler.CompilerException

Throws:

com.tangosol.dev.compiler.CompilerException

parseXmlDecl

protected void parseXmlDecl(XmlDocument xml)
                     throws com.tangosol.dev.compiler.CompilerException

Throws:

com.tangosol.dev.compiler.CompilerException

parseDoctype

protected void parseDoctype(XmlDocument xml)
                     throws com.tangosol.dev.compiler.CompilerException

Throws:

com.tangosol.dev.compiler.CompilerException

parseElement

protected void parseElement(XmlElement xml)
                     throws com.tangosol.dev.compiler.CompilerException

Note: '<' and element name have already been parsed

Throws:

com.tangosol.dev.compiler.CompilerException

parseMisc

protected void parseMisc(XmlElement xml)
                  throws com.tangosol.dev.compiler.CompilerException

Throws:

com.tangosol.dev.compiler.CompilerException

parseComment

protected void parseComment(XmlElement xml)
                     throws com.tangosol.dev.compiler.CompilerException

Throws:

com.tangosol.dev.compiler.CompilerException

parseComment

protected void parseComment(XmlElement xml,
                            boolean fIsDocument)
                     throws com.tangosol.dev.compiler.CompilerException

Throws:

com.tangosol.dev.compiler.CompilerException

hasCurrent

protected boolean hasCurrent()

Determine if there is a current token.

Returns:

true if there is a current token

current

protected com.tangosol.run.xml.XmlToken current()
                                         throws com.tangosol.dev.compiler.CompilerException

Returns the current token and advances to the next token.

Returns:

the current token

Throws:

com.tangosol.dev.compiler.CompilerException - potentially thrown by the tokenizer

hasNext

protected boolean hasNext()

Determine if there is a next token.

Returns:

true if there is a next token

next

protected com.tangosol.run.xml.XmlToken next()
                                      throws com.tangosol.dev.compiler.CompilerException

Advances to and returns the next token.

Returns:

the next token

Throws:

com.tangosol.dev.compiler.CompilerException - potentially thrown by the tokenizer

match

protected com.tangosol.run.xml.XmlToken match(int id)
                                       throws com.tangosol.dev.compiler.CompilerException

Verifies that the current token matches the passed token id and, if so, advances to the next token. Otherwise, a syntax exception is thrown.

Parameters:

id - the token id to match

Returns:

the current token

Throws:

com.tangosol.dev.compiler.SyntaxException - thrown if the token does not match

com.tangosol.dev.compiler.CompilerException - potentially thrown by the tokenizer

match

protected com.tangosol.run.xml.XmlToken match(java.lang.String sName)
                                       throws com.tangosol.dev.compiler.CompilerException

Verifies that the current token is a name token whose name matches the passed String and, if so, advances to the next token. Otherwise, a syntax exception is thrown.

Parameters:

sName - the name token text to match

Returns:

the matched token

Throws:

com.tangosol.dev.compiler.SyntaxException - thrown if the token does not match

com.tangosol.dev.compiler.CompilerException - potentially thrown by the tokenizer

peek

protected com.tangosol.run.xml.XmlToken peek(int id)
                                      throws com.tangosol.dev.compiler.CompilerException

Tests if the current token matches the passed token id and, if so, advances to the next token.

Parameters:

id - the token id to peek for

Returns:

the current token, if matched, or null

Throws:

com.tangosol.dev.compiler.CompilerException - potentially thrown by the tokenizer

peek

protected com.tangosol.run.xml.XmlToken peek(int cat,
                                             int subcat)
                                      throws com.tangosol.dev.compiler.CompilerException

Tests if the current token matches the passed token category and sub-category. If so, it returns the current token and advances to the next token.

Parameters:

cat - the category to peek for

subcat - the sub-category to peek for

Returns:

the current token, if matched, or null

Throws:

com.tangosol.dev.compiler.CompilerException - potentially thrown by the tokenizer

peek

protected com.tangosol.run.xml.XmlToken peek(java.lang.String sName)
                                      throws com.tangosol.dev.compiler.CompilerException

Tests if the current token is a name that matches the passed String and, if so, advances to the next token.

Parameters:

sName - the name token text to peek for

Returns:

id the current token, if matched, or null

Throws:

com.tangosol.dev.compiler.CompilerException - potentially thrown by the tokenizer

mark

protected com.tangosol.run.xml.XmlToken mark()

Marks the current position and returns it as a token.

Returns:

the current token

skipBOM

protected java.io.InputStream skipBOM(java.io.InputStream in)
                               throws java.io.IOException

Read the provided InputStream to determine if the stream starts with a UTF-8 BOM (http://www.unicode.org/faq/utf_bom.html#BOM). If the BOM is present, advance the stream to skip it.

This is a workaround for the inability of the Java UTF-8 encoding to recognize the UTF-8 BOM (http://bugs.sun.com/view_bug.do?bug_id=4508058).

Parameters:

in - InputStream to check for BOM

Returns:

an InputStream with the UTF-8 BOM skipped

Throws:

java.io.IOException

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