Package com.singularsys.jep.misc.javaops

# Class TernaryConditional

java.lang.Object
com.singularsys.jep.functions.PostfixMathCommand
com.singularsys.jep.misc.javaops.TernaryConditional

All Implemented Interfaces:
  `CallbackEvaluationI`, `PostfixMathCommandI`, `Serializable`

public class TernaryConditional extends PostfixMathCommand implements CallbackEvaluationI
Implements the `condition ? x : y` behaviour Since 4.0 this now operates in a lazy fashion so only the needed branch is evaluated.

See Also:
  - Serialized Form

- ## Field Summary

  ### Fields inherited from class com.singularsys.jep.functions.PostfixMathCommand

  `curNumberOfParameters, description, name, NaN, numberOfParameters`

- ## Constructor Summary

  Constructors
  Constructor
  Description
  `TernaryConditional()`

- ## Method Summary

  Modifier and Type
  Method
  Description
  `Object`
  `evaluate(Node node, Evaluator pv)`
  Performs some special evaluation on the node.
  `void`
  `run(Stack<Object> aStack)`
  Throws an exception because this method should never be called under normal circumstances.

  ### Methods inherited from class com.singularsys.jep.functions.PostfixMathCommand

  `asArray, asBool, asDouble, asInt, asLong, asStrictInt, asString, asType, checkNumberOfParameters, getDescription, getDescription, getDescriptionWithType, getName, getNumberOfParameters, setCurNumberOfParameters, setDescription, setName, toString, toString`

  ### Methods inherited from class java.lang.Object

  `clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait`

- ## Constructor Details

  - ### TernaryConditional

    public TernaryConditional()

- ## Method Details

  - ### run

    public void run(Stack<Object> aStack) throws EvaluationException
    Description copied from class: `PostfixMathCommand`
    Throws an exception because this method should never be called under normal circumstances. Each function should use its own `run()` method for evaluating the function. This includes popping off the parameters from the stack, and pushing the result back on the stack.
    Specified by:
      `run` in interface `PostfixMathCommandI`
    Overrides:
      `run` in class `PostfixMathCommand`
    Parameters:
      `aStack` - arguments for function
    Throws:
      `EvaluationException` - if function cannot be evaluated

  - ### evaluate

    public Object evaluate(Node node, Evaluator pv) throws EvaluationException
    Description copied from interface: `CallbackEvaluationI`
    Performs some special evaluation on the node. This method has the responsibility for evaluating the children of the node, and it should generally call

         pv.eval(node.jjtGetChild(i))

    for each child. The SymbolTable is not passed as an argument. This is because it is better practice to get and set variable values by using node.getVar().setValue() rather that through the SymbolTable with requires a hashtable lookup.
    Specified by:
      `evaluate` in interface `CallbackEvaluationI`
    Parameters:
      `node` - The current node
      `pv` - The visitor, can be used evaluate the children
    Returns:
      the value after evaluation. This value will be passed to other functions higher up the node tree. The value can be any type including Double or Vector<Object>
    Throws:
      `EvaluationException` - if the calculation cannot be performed
    Since:
      4.0
    See Also:
      - `Evaluator`