Package com.singularsys.jep.functions
Class Assign
- java.lang.Object
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- com.singularsys.jep.functions.PostfixMathCommand
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- com.singularsys.jep.functions.Assign
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- All Implemented Interfaces:
CallbackEvaluationI
,PostfixMathCommandI
,java.io.Serializable
- Direct Known Subclasses:
ThreadSafeAssign
public class Assign extends PostfixMathCommand implements CallbackEvaluationI
An assignment operator so we can do x=3+4. This function implements the CallbackEvaluationI interface so that it handles setting the value of a variable. Any Variable or functions which implementsLValueI
can appear on the left hand side of the equation.- Author:
- Rich Morris Created on 18-Nov-2003
- 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 Assign()
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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)
For assignment set the value of the variable on the lhs to value returned by evaluating the right-hand side.-
Methods inherited from class com.singularsys.jep.functions.PostfixMathCommand
asArray, asBool, asDouble, asInt, asLong, asStrictInt, asString, checkNumberOfParameters, getName, getNumberOfParameters, run, setCurNumberOfParameters, setName, toString, toString
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Method Detail
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evaluate
public java.lang.Object evaluate(Node node, Evaluator pv) throws EvaluationException
For assignment set the value of the variable on the lhs to value returned by evaluating the right-hand side.- 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- See Also:
Evaluator
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