Package com.singularsys.extensions.xjep
Class ExtractEqn
- java.lang.Object
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- com.singularsys.jep.functions.PostfixMathCommand
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- com.singularsys.extensions.xjep.ExtractEqn
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- All Implemented Interfaces:
CommandVisitorI
,JepComponent
,PostfixMathCommandI
,java.io.Serializable
public class ExtractEqn extends PostfixMathCommand implements JepComponent, CommandVisitorI
Extracts the equation of a symbolic variabley := (x - 1)^2 expand(eqn(y))
Will return
x*(x+1.0)*(x-1.0)
.The operation depends on the
EquationExtractor
class, this must be defined either by supplying an XJep instance or explicitly in a constructor.- See Also:
CommandVisitorI
,SubstitutionVisitor
, Serialized Form
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Field Summary
Fields Modifier and Type Field Description protected EquationExtractor
ee
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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 ExtractEqn()
Default constructor, anXJep
instance must be later defined by callingjep.reinitializeComponents()
.ExtractEqn(XJep xjep)
Constructor with explicit XJep instance
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description JepComponent
getLightWeightInstance()
Gets a light-weight instance suitable for using in multiple threads.void
init(Jep jep)
Initialize the component.Node
process(Node node, Node[] children)
Performs the specified action on an expression tree.-
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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Field Detail
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ee
protected EquationExtractor ee
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Method Detail
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process
public Node process(Node node, Node[] children) throws ParseException
Description copied from interface:CommandVisitorI
Performs the specified action on an expression tree.- Specified by:
process
in interfaceCommandVisitorI
- Parameters:
node
- top node of the treechildren
- the children of the node after they have been preprocessed.- Returns:
- top node of the results.
- Throws:
ParseException
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init
public void init(Jep jep)
Description copied from interface:JepComponent
Initialize the component. This methods is called whenever a component is added to Jep. Hence it allows components to keep track of the other components they may rely on.- Specified by:
init
in interfaceJepComponent
- Parameters:
jep
- the current Jep instance
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getLightWeightInstance
public JepComponent getLightWeightInstance()
Description copied from interface:JepComponent
Gets a light-weight instance suitable for using in multiple threads.- Specified by:
getLightWeightInstance
in interfaceJepComponent
- Returns:
- either an new instance, null or 'this'.
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