Package com.singularsys.extensions.polynomials

Class Compare

java.lang.Object

com.singularsys.jep.functions.PostfixMathCommand

com.singularsys.extensions.polynomials.Compare

All Implemented Interfaces:

CommandVisitorI, JepComponent, PostfixMathCommandI, java.io.Serializable

public class Compare
extends PostfixMathCommand
implements CommandVisitorI, JepComponent

The compare(x,y) command. Compares the two expressions and returns -1, 0 or 1.

See Also:

Serialized Form

Field Summary

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

curNumberOfParameters, name, NaN, numberOfParameters

Constructor Summary

Constructors

Constructor	Description
Compare(boolean expand)	Constructor when the PolynomialCreator is found when init(Jep) is called.
Compare(PolynomialCreator pc, boolean expand)	Constructor with a specific PolynomialCreator
Compare(XJep jep, boolean expand)	Constructor where the PolynomialCreator from the jep instance is used

Method Summary

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)	Pre-process command performs comparison the two children of the node.

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

asArray, asBool, asDouble, asInt, asLong, asStrictInt, asString, checkNumberOfParameters, getName, getNumberOfParameters, run, setCurNumberOfParameters, setName, toString, toString

Methods inherited from class java.lang.Object

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

Constructor Detail

Compare

public Compare(PolynomialCreator pc,
               boolean expand)

Constructor with a specific PolynomialCreator

Parameters:

pc -

expand - whether to expand before comparison

Compare

public Compare(XJep jep,
               boolean expand)

Constructor where the PolynomialCreator from the jep instance is used

Parameters:

jep -

expand - whether to expand before comparison

Compare

public Compare(boolean expand)

Constructor when the PolynomialCreator is found when init(Jep) is called.

Parameters:

expand - whether to expand before comparison

Method Detail

process

public Node process(Node node,
                    Node[] children)
             throws ParseException

Pre-process command performs comparison the two children of the node.

Specified by:

process in interface CommandVisitorI

Parameters:

node - top node of the tree

children - the children of the node after they have been preprocessed.

Returns:

top node of the results.

Throws:

ParseException

See Also:

CommandVisitorI

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 interface JepComponent

Parameters:

jep - the current Jep instance

getLightWeightInstance

public JepComponent getLightWeightInstance()

Description copied from interface: JepComponent

Gets a light-weight instance suitable for using in multiple threads.

Specified by:

getLightWeightInstance in interface JepComponent

Returns:

either an new instance, null or 'this'.