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java.lang.Object | +--com.japisoft.xpath.function.AbstractFunction | +--com.japisoft.xpath.function.basic.Number
function converts its argument to a number as follows: a string that consists of optional whitespace followed by an optional minus sign followed by a Number followed by whitespace is converted to the IEEE 754 number that is nearest (according to the IEEE 754 round-to-nearest rule) to the mathematical value represented by the string; any other string is converted to NaN boolean true is converted to 1; boolean false is converted to 0 a node-set is first converted to a string as if by a call to the string function and then converted in the same way as a string argument an object of a type other than the four basic types is converted to a number in a way that is dependent on that type
Constructor Summary | |
Number()
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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 |
public Number()
Method Detail |
public java.lang.Object eval(XPathContext context, FastVector arg)
AbstractFunction
eval
in interface Function
eval
in class AbstractFunction
arg
- a Vector
value, this is the responsability of the function to test the argument type
Object
value like Integer, Boolean, String or NodeSet
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