com.japisoft.xpath.function.basic
Class SubString

java.lang.Object
  |
  +--com.japisoft.xpath.function.AbstractFunction
        |
        +--com.japisoft.xpath.function.basic.SubString
All Implemented Interfaces:
Function

public final class SubString
extends AbstractFunction

function returns the substring of the first argument starting at the position specified in the second argument with length specified in the third argument. For example, substring("12345",2,3) returns "234". If the third argument is not specified, it returns the substring starting at the position specified in the second argument and continuing to the end of the string. For example, substring("12345",2) returns "2345"

Author:
(c) 2003 JAPISOFT

Constructor Summary
SubString()
           
 
Method Summary
 java.lang.Object eval(XPathContext context, FastVector arg)
          Evalute this function for this context and the following arguments
 
Methods inherited from class com.japisoft.xpath.function.AbstractFunction
checkOneNodeSet, checkOneNumber, checkOneParameter, checkOneString, checkThreeStrings, checkTwoStrings, getString1, getString2, toString
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait
 

Constructor Detail

SubString

public SubString()
Method Detail

eval

public java.lang.Object eval(XPathContext context,
                             FastVector arg)
Description copied from class: AbstractFunction
Evalute this function for this context and the following arguments

Specified by:
eval in interface Function
Specified by:
eval in class AbstractFunction
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