org.jaxen.saxpath.base
Class XPathReader

java.lang.Object
  org.jaxen.saxpath.base.XPathReader

All Implemented Interfaces:

SAXPathEventSource, XPathReader

public class XPathReader
extends java.lang.Object
implements XPathReader

Implementation of SAXPath's XPathReader which generates callbacks to an XPathHandler.

Author:

bob mcwhirter (bob@werken.com)

Field Summary

private static XPathHandler	defaultHandler
private XPathHandler	handler
private XPathLexer	lexer
private java.util.ArrayList	tokens

Constructor Summary

XPathReader()
Create a new XPathReader with a do-nothing XPathHandler.

Method Summary

private void	abbrStep()
private void	absoluteLocationPath()
private void	additiveExpr()
private void	andExpr()
private void	arguments()
private int	axisSpecifier()
private XPathSyntaxException	createSyntaxException(java.lang.String message)
private void	equalityExpr()
private void	expr()
private void	filterExpr()
private void	functionCall()
XPathHandler	getXPathHandler() Retrieve the current XPathHandler which receives the event callbacks.
private boolean	isNodeTypeName(Token name)
private int	LA(int position)
private void	literal()
(package private) void	locationPath(boolean isAbsolute)
private Token	LT(int position)
private Token	match(int tokenType)
private void	multiplicativeExpr()
private void	nameTest(int axis)
private void	nodeTest(int axis)
private void	nodeTypeTest(int axis)
private void	orExpr()
void	parse(java.lang.String xpath) Parse an XPath expression, and send event callbacks to an XPathHandler.
private void	pathExpr()
(package private) void	predicate()
private void	predicateExpr()
private void	predicates()
private void	relationalExpr()
private void	relativeLocationPath()
(package private) void	setUpParse(java.lang.String xpath)
void	setXPathHandler(XPathHandler handler) Set the XPathHandler to receive event callbacks during the parse.
(package private) void	step()
private void	steps()
private void	throwInvalidAxis(java.lang.String invalidAxis)
private void	unaryExpr()
private void	unionExpr()
private void	variableReference()

Methods inherited from class java.lang.Object

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

Field Detail

tokens

private java.util.ArrayList tokens

lexer

private XPathLexer lexer

handler

private XPathHandler handler

defaultHandler

private static XPathHandler defaultHandler

Constructor Detail

XPathReader

public XPathReader()

Create a new XPathReader with a do-nothing XPathHandler.

Method Detail

setXPathHandler

public void setXPathHandler(XPathHandler handler)

Description copied from interface: SAXPathEventSource

Set the XPathHandler to receive event callbacks during the parse.

Specified by:

setXPathHandler in interface SAXPathEventSource

Parameters:

handler - the handler to receive callbacks

getXPathHandler

public XPathHandler getXPathHandler()

Description copied from interface: SAXPathEventSource

Retrieve the current XPathHandler which receives the event callbacks.

Specified by:

getXPathHandler in interface SAXPathEventSource

Returns:

the currently installed XPathHandler

parse

public void parse(java.lang.String xpath)
           throws SAXPathException

Description copied from interface: XPathReader

Parse an XPath expression, and send event callbacks to an XPathHandler.

Specified by:

parse in interface XPathReader

Parameters:

xpath - the textual XPath expression to parse

Throws:

SAXPathException - if the expression is syntactically incorrect

setUpParse

void setUpParse(java.lang.String xpath)

pathExpr

private void pathExpr()
               throws SAXPathException

Throws:

SAXPathException

literal

private void literal()
              throws SAXPathException

Throws:

SAXPathException

functionCall

private void functionCall()
                   throws SAXPathException

Throws:

SAXPathException

arguments

private void arguments()
                throws SAXPathException

Throws:

SAXPathException

filterExpr

private void filterExpr()
                 throws SAXPathException

Throws:

SAXPathException

variableReference

private void variableReference()
                        throws SAXPathException

Throws:

SAXPathException

locationPath

void locationPath(boolean isAbsolute)
            throws SAXPathException

Throws:

SAXPathException

absoluteLocationPath

private void absoluteLocationPath()
                           throws SAXPathException

Throws:

SAXPathException

relativeLocationPath

private void relativeLocationPath()
                           throws SAXPathException

Throws:

SAXPathException

steps

private void steps()
            throws SAXPathException

Throws:

SAXPathException

step

void step()
    throws SAXPathException

Throws:

SAXPathException

axisSpecifier

private int axisSpecifier()
                   throws SAXPathException

Throws:

SAXPathException

nodeTest

private void nodeTest(int axis)
               throws SAXPathException

Throws:

SAXPathException

nodeTypeTest

private void nodeTypeTest(int axis)
                   throws SAXPathException

Throws:

SAXPathException

nameTest

private void nameTest(int axis)
               throws SAXPathException

Throws:

SAXPathException

abbrStep

private void abbrStep()
               throws SAXPathException

Throws:

SAXPathException

predicates

private void predicates()
                 throws SAXPathException

Throws:

SAXPathException

predicate

void predicate()
         throws SAXPathException

Throws:

SAXPathException

predicateExpr

private void predicateExpr()
                    throws SAXPathException

Throws:

SAXPathException

expr

private void expr()
           throws SAXPathException

Throws:

SAXPathException

orExpr

private void orExpr()
             throws SAXPathException

Throws:

SAXPathException

andExpr

private void andExpr()
              throws SAXPathException

Throws:

SAXPathException

equalityExpr

private void equalityExpr()
                   throws SAXPathException

Throws:

SAXPathException

relationalExpr

private void relationalExpr()
                     throws SAXPathException

Throws:

SAXPathException

additiveExpr

private void additiveExpr()
                   throws SAXPathException

Throws:

SAXPathException

multiplicativeExpr

private void multiplicativeExpr()
                         throws SAXPathException

Throws:

SAXPathException

unaryExpr

private void unaryExpr()
                throws SAXPathException

Throws:

SAXPathException

unionExpr

private void unionExpr()
                throws SAXPathException

Throws:

SAXPathException

match

private Token match(int tokenType)
             throws XPathSyntaxException

Throws:

XPathSyntaxException

LA

private int LA(int position)

LT

private Token LT(int position)

isNodeTypeName

private boolean isNodeTypeName(Token name)

createSyntaxException

private XPathSyntaxException createSyntaxException(java.lang.String message)

throwInvalidAxis

private void throwInvalidAxis(java.lang.String invalidAxis)
                       throws SAXPathException

Throws:

SAXPathException