Package org.jaxen.function
Class BooleanFunction
java.lang.Object
org.jaxen.function.BooleanFunction
- All Implemented Interfaces:
Function
4.3 boolean boolean(object)
The boolean function converts its argument to a boolean as follows:
a number is true if and only if it is neither positive or negative zero nor NaN
a node-set is true if and only if it is non-empty
a string is true if and only if its length is non-zero
an object of a type other than the four basic types is converted to a boolean in a way that is dependent on that type
- See Also:
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Constructor Summary
Constructors -
Method Summary
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Constructor Details
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BooleanFunction
public BooleanFunction()Create a newBooleanFunction
object.
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Method Details
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call
Convert the argument to aBoolean
- Specified by:
call
in interfaceFunction
- Parameters:
context
- the context at the point in the expression when the function is calledargs
- a list with exactly one item which will be converted to aBoolean
- Returns:
- the result of evaluating the function;
Boolean.TRUE
orBoolean.FALSE
- Throws:
FunctionCallException
- ifargs
has more or less than one item
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