Package com.singularsys.jep.misc.javaops

Class OpEquals

java.lang.Object

com.singularsys.jep.functions.PostfixMathCommand

com.singularsys.jep.misc.javaops.OpEquals

All Implemented Interfaces:

CallbackEvaluationI, PostfixMathCommandI, Serializable

public class OpEquals
extends PostfixMathCommand
implements CallbackEvaluationI

Function implementing compound assignment operators such as +=, *= etc. The operator is specified by the fun parameter in the constructor.

See Also:

• Serialized Form

Field Summary

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

curNumberOfParameters, description, name, NaN, numberOfParameters

Constructor Summary

Constructors

Constructor	Description
OpEquals(PostfixMathCommandI fun)

Method Summary

Modifier and Type	Method	Description
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.
String	getDescription()	Return a description of the function from the properties file.
PostfixMathCommandI	getRoot()

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

asArray, asBool, asDouble, asInt, asLong, asStrictInt, asString, asType, checkNumberOfParameters, getDescription, getDescriptionWithType, getName, getNumberOfParameters, run, setCurNumberOfParameters, setDescription, setName, toString, toString

Methods inherited from class java.lang.Object

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

Constructor Details

OpEquals

public OpEquals(PostfixMathCommandI fun)

Method Details

getRoot

public PostfixMathCommandI getRoot()

evaluate

public 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 interface CallbackEvaluationI

Parameters:

node - The current node

pv - 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

getDescription

public String getDescription()

Description copied from class: PostfixMathCommand

Return a description of the function from the properties file. The property name is the class name followed by ".description". The property is found using the JepMessages class, which can be configured to add additional properties files. If PostfixMathCommand.setDescription(String) has been called, return the description set by that method instead.

Specified by:

getDescription in interface PostfixMathCommandI

Overrides:

getDescription in class PostfixMathCommand

Returns:

the description of the function