com.ximpleware
Class Expr

java.lang.Object
  com.ximpleware.Expr

Direct Known Subclasses:

BinaryExpr, CachedExpr, FilterExpr, FuncExpr, LiteralExpr, LocationPathExpr, NumExpr, PathExpr, UnaryExpr, UnionExpr, VariableExpr

public abstract class Expr
extends Object

This is the abstract class on which all XPath expressions are based

Constructor Summary

Expr()

Method Summary

abstract int	adjust(int n)
void	clearCache()
protected int	computeDataSize(VTDNav vn)
abstract boolean	evalBoolean(VTDNav vn)
abstract int	evalNodeSet(VTDNav vn)
abstract double	evalNumber(VTDNav vn)
abstract String	evalString(VTDNav vn)
abstract boolean	isBoolean()
abstract boolean	isFinal()
abstract boolean	isNodeSet()
abstract boolean	isNumerical()
abstract boolean	isString()
void	markCacheable()
void	markCacheable2()
abstract boolean	requireContextSize()
abstract void	reset(VTDNav vn)
abstract void	setContextSize(int size)
abstract void	setPosition(int pos)
abstract String	toString()

Methods inherited from class java.lang.Object

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

Constructor Detail

Expr

public Expr()

Method Detail

evalBoolean

public abstract boolean evalBoolean(VTDNav vn)

evalNumber

public abstract double evalNumber(VTDNav vn)

evalNodeSet

public abstract int evalNodeSet(VTDNav vn)
                         throws XPathEvalException,
                                NavException

Throws:

XPathEvalException

NavException

evalString

public abstract String evalString(VTDNav vn)

reset

public abstract void reset(VTDNav vn)

toString

public abstract String toString()

Overrides:

toString in class Object

isNumerical

public abstract boolean isNumerical()

isNodeSet

public abstract boolean isNodeSet()

isString

public abstract boolean isString()

isBoolean

public abstract boolean isBoolean()

requireContextSize

public abstract boolean requireContextSize()

setContextSize

public abstract void setContextSize(int size)

setPosition

public abstract void setPosition(int pos)

adjust

public abstract int adjust(int n)

isFinal

public abstract boolean isFinal()

markCacheable

public void markCacheable()

markCacheable2

public void markCacheable2()

clearCache

public void clearCache()

computeDataSize

protected int computeDataSize(VTDNav vn)