org.deri.iris.builtins.datatype
Class ToBooleanBuiltin

java.lang.Object
  org.deri.iris.builtins.AbstractBuiltin
      org.deri.iris.builtins.FunctionalBuiltin
          org.deri.iris.builtins.datatype.ConversionBuiltin
              org.deri.iris.builtins.datatype.ToBooleanBuiltin

All Implemented Interfaces:

Comparable<IAtom>, IAtom, IBuiltinAtom

public class ToBooleanBuiltin
extends ConversionBuiltin

Represents a data type conversion function, which converts supported data type instances to Boolean instances. The following data types are supported:

• Float
• Double
• Decimal
• Integer
• String

Field Summary

Fields inherited from class org.deri.iris.builtins.AbstractBuiltin

EMPTY_TERM

Constructor Summary

ToBooleanBuiltin(ITerm... terms)
Creates a new instance of this builtin.

Method Summary

protected ITerm	convert(ITerm term) Converts the given supported data type instance to the specific data type
static IBooleanTerm	toBoolean(INumericTerm term) Converts a Numeric term to a Boolean term.
static IBooleanTerm	toBoolean(IStringTerm term) Converts a String term to a Boolean term.

Methods inherited from class org.deri.iris.builtins.datatype.ConversionBuiltin

computeResult

Methods inherited from class org.deri.iris.builtins.FunctionalBuiltin

evaluateTerms, maxUnknownVariables, testForEquality

Methods inherited from class org.deri.iris.builtins.AbstractBuiltin

compareTo, equals, evaluate, getPredicate, getTuple, hashCode, isBuiltin, isGround, toString

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

ToBooleanBuiltin

public ToBooleanBuiltin(ITerm... terms)

Creates a new instance of this builtin.

Parameters:

terms - The term representing the data type instance to be converted.

Method Detail

convert

protected ITerm convert(ITerm term)

Description copied from class: ConversionBuiltin

Converts the given supported data type instance to the specific data type

Specified by:

convert in class ConversionBuiltin

Returns:

The result of the conversion or null if the specified data type is not compatible.

toBoolean

public static IBooleanTerm toBoolean(IStringTerm term)

Converts a String term to a Boolean term.

Parameters:

term - The String term to be converted.

Returns:

A new Boolean term representing the result of the conversion.

toBoolean

public static IBooleanTerm toBoolean(INumericTerm term)

Converts a Numeric term to a Boolean term. The Boolean term represents true, if the numeric term represents any number not equal to 0.0, falsefalse otherwise.

Parameters:

term - The Numeric term to be converted.

Returns:

A new Boolean term representing the result of the conversion.