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java.lang.Object com.singularsys.jep.functions.PostfixMathCommand com.singularsys.jep.functions.If com.singularsys.jep.misc.nullwrapper.functions.NullWrappedIf
public class NullWrappedIf
NullWrapped version of the if function. If the first argument is null then null is returned otherwise results are the same as the standard if function.
If
,
Serialized FormNested Class Summary |
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Nested classes/interfaces inherited from interface com.singularsys.jep.functions.CallbackEvaluationI |
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CallbackEvaluationI.Runnable |
Field Summary |
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Fields inherited from class com.singularsys.jep.functions.If |
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falseValue |
Fields inherited from class com.singularsys.jep.functions.PostfixMathCommand |
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curNumberOfParameters, name, NaN, numberOfParameters |
Constructor Summary | |
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NullWrappedIf()
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NullWrappedIf(java.lang.Object falseValue)
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Method Summary | |
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java.lang.Object |
evaluate(Node node,
Evaluator pv)
Performs some special evaluation on the node. |
Methods inherited from class com.singularsys.jep.functions.If |
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checkNumberOfParameters, getFalseValue, run |
Methods inherited from class com.singularsys.jep.functions.PostfixMathCommand |
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asArray, asBool, asDouble, asInt, asLong, asStrictInt, asString, checkStack, getName, getNumberOfParameters, setCurNumberOfParameters, setName, toString |
Methods inherited from class java.lang.Object |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Constructor Detail |
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public NullWrappedIf()
public NullWrappedIf(java.lang.Object falseValue)
falseValue
- Method Detail |
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public java.lang.Object evaluate(Node node, Evaluator pv) throws EvaluationException
CallbackEvaluationI
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.
evaluate
in interface CallbackEvaluationI
evaluate
in class If
node
- The current nodepv
- The visitor, can be used evaluate the children
EvaluationException
Evaluator
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