Package com.singularsys.jep.misc.javaops
Class TernaryConditional
- java.lang.Object
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- com.singularsys.jep.functions.PostfixMathCommand
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- com.singularsys.jep.misc.javaops.TernaryConditional
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- All Implemented Interfaces:
CallbackEvaluationI
,PostfixMathCommandI
,java.io.Serializable
public class TernaryConditional extends PostfixMathCommand implements CallbackEvaluationI
Implements thecondition ? x : y
behaviour Since 4.0 this now operates in a lazy fashion so only the needed branch is evaluated.- See Also:
- Serialized Form
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Field Summary
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Fields inherited from class com.singularsys.jep.functions.PostfixMathCommand
curNumberOfParameters, name, NaN, numberOfParameters
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Constructor Summary
Constructors Constructor Description TernaryConditional()
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description java.lang.Object
evaluate(Node node, Evaluator pv)
Performs some special evaluation on the node.void
run(java.util.Stack<java.lang.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, checkNumberOfParameters, getName, getNumberOfParameters, setCurNumberOfParameters, setName, toString, toString
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Method Detail
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run
public void run(java.util.Stack<java.lang.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 it's 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 interfacePostfixMathCommandI
- Overrides:
run
in classPostfixMathCommand
- Parameters:
aStack
- arguments for function- Throws:
EvaluationException
- if function cannot be evaluated
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evaluate
public java.lang.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 callpv.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 interfaceCallbackEvaluationI
- Parameters:
node
- The current nodepv
- 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
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