com.japisoft.xpath.function
Class AbstractFunction

java.lang.Object
  |
  +--com.japisoft.xpath.function.AbstractFunction

All Implemented Interfaces:

Function

Direct Known Subclasses:

Boolean, Ceiling, Concat, Contains, Count, False, Floor, Id, Lang, Last, LocalName, Name, NamespaceURI, NormalizeSpace, Not, Number, Position, Round, StartsWith, String, StringLength, SubString, SubStringAfter, SubStringBefore, Sum, Translate, True

public abstract class AbstractFunction

extends java.lang.Object

implements Function

AbstractFunction

Version:

1.0

Author:

(c) 2003 JAPISOFT

Constructor Summary

AbstractFunction()

Method Summary

void	checkOneNodeSet(FastVector arg) Throw a RuntimeException if arg has no single NodeSet argument
void	checkOneNumber(FastVector arg) Throw a RuntimeException if arg has no single NodeSet argument
void	checkOneParameter(FastVector arg) Throw a RuntimeException if arg has no single argument
void	checkOneString(FastVector arg) Throw a RuntimeException if arg has no 1 string argument
void	checkThreeStrings(FastVector arg) Throw a RuntimeException if arg has no 3 string arguments
void	checkTwoStrings(FastVector arg) Throw a RuntimeException if arg has no 2 string arguments
abstract java.lang.Object	eval(XPathContext context, FastVector arg) Evalute this function for this context and the following arguments
java.lang.String	getString1(XPathContext context, FastVector arg)
java.lang.String	getString2(XPathContext context, FastVector arg)
java.lang.String	toString()

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

AbstractFunction

public AbstractFunction()

Method Detail

eval

public abstract java.lang.Object eval(XPathContext context,
                                      FastVector arg)

Evalute this function for this context and the following arguments

Specified by:

eval in interface Function

Parameters:

arg - a Vector value, this is the responsability of the function to test the argument type

Returns:

an Object value like Integer, Boolean, String or NodeSet

checkOneNumber

public void checkOneNumber(FastVector arg)

Throw a RuntimeException if arg has no single NodeSet argument

checkOneNodeSet

public void checkOneNodeSet(FastVector arg)

Throw a RuntimeException if arg has no single NodeSet argument

checkOneParameter

public void checkOneParameter(FastVector arg)

Throw a RuntimeException if arg has no single argument

checkOneString

public void checkOneString(FastVector arg)

Throw a RuntimeException if arg has no 1 string argument

checkTwoStrings

public void checkTwoStrings(FastVector arg)

Throw a RuntimeException if arg has no 2 string arguments

checkThreeStrings

public void checkThreeStrings(FastVector arg)

Throw a RuntimeException if arg has no 3 string arguments

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object

Returns:

only the class name without the package

getString1

public java.lang.String getString1(XPathContext context,
                                   FastVector arg)

getString2

public java.lang.String getString2(XPathContext context,
                                   FastVector arg)