NullSafeEquals

java.lang.Object

com.singularsys.jep.functions.PostfixMathCommand

com.singularsys.jep.functions.BinaryFunction

com.singularsys.jep.functions.Comparative

com.singularsys.jep.misc.nullwrapper.functions.NullSafeEquals

All Implemented Interfaces:: NullWrappedFunctionI, PostfixMathCommandI, Serializable

public class NullSafeEquals extends Comparative implements NullWrappedFunctionI

The Null Safe equals function. null <=> null is true; null <=> non-null is false; not-null <=> null is false; other value as Comparative

Since:

3.4

Author:

Richard Morris

See Also:

Serialized Form

Field Summary

Fields inherited from class com.singularsys.jep.functions.Comparative
EQ, GE, GT, LE, LT, NE

Fields inherited from class com.singularsys.jep.functions.PostfixMathCommand
curNumberOfParameters, name, NaN, numberOfParameters
Constructor Summary

Constructors

Constructor

Description

NullSafeEquals()
Method Summary

Modifier and Type

Method

Description

Object

eval(Object l, Object r)

PostfixMathCommandI

getRoot()

Get to function which this function wraps.

Methods inherited from class com.singularsys.jep.functions.Comparative
compare, eq, ge, getId, getTolerance, gt, le, lt, ne, setTolerance

Methods inherited from class com.singularsys.jep.functions.BinaryFunction
instanceOf, instanceOf, run

Methods inherited from class com.singularsys.jep.functions.PostfixMathCommand
asArray, asBool, asDouble, asInt, asLong, asStrictInt, asString, checkNumberOfParameters, getName, getNumberOfParameters, setCurNumberOfParameters, setName, toString, toString

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Details
- NullSafeEquals
  
  public NullSafeEquals()
Method Details
- getRoot
  
  public PostfixMathCommandI getRoot()
  
  Description copied from interface: NullWrappedFunctionI
  
  Get to function which this function wraps.
  
  Specified by:
  
  getRoot in interface NullWrappedFunctionI
  
  Returns:
  
  the root function, may be "this".
- eval
  
  public Object eval(Object l, Object r) throws EvaluationException
  
  Overrides:
  
  eval in class Comparative
  
  Throws:
  
  EvaluationException