Package com.singularsys.jep.misc.functions

Class SwitchDefaultNonLazy

java.lang.Object

com.singularsys.jep.functions.PostfixMathCommand

com.singularsys.jep.functions.NaryFunction

com.singularsys.jep.misc.functions.SwitchDefaultNonLazy

All Implemented Interfaces:

PostfixMathCommandI, Serializable

public class SwitchDefaultNonLazy
extends NaryFunction

A switch statement, with a default value. The argument is selected based on the integer value of the first argument, the last argument is returned if the first argument is greater than the number of arguments -2. For example switchDefault(2,5,6,7,8) will return 5, and switchDefault(9,5,6,7,8) will return 8. The first argument must be an exact integer.

This is the non-lazy version of the function, all arguments are evaluated before the switch statement is executed. See SwitchDefault for the lazy evaluation version.

Since:

Jep 4.1

Author:

Richard Morris

See Also:

• Case
• Serialized Form

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static enum	SwitchDefaultNonLazy.NullBehaviour	Action to take if first argument is null.

Field Summary

Fields

Modifier and Type	Field	Description
protected SwitchDefaultNonLazy.NullBehaviour	nullBehaviour

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

curNumberOfParameters, description, name, NaN, numberOfParameters

Constructor Summary

Constructors

Constructor	Description
SwitchDefaultNonLazy()	Default switch statement.
SwitchDefaultNonLazy(SwitchDefaultNonLazy.NullBehaviour nullBehaviour)	Switch function with defined null behaviour.

Method Summary

Modifier and Type	Method	Description
boolean	checkNumberOfParameters(int n)	Checks the number of parameters of the function.
Object	eval(Object[] args)	Evaluate the function
SwitchDefaultNonLazy.NullBehaviour	getNullBehaviour()	Behaviour when passed zero arguments.

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

run

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

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

Methods inherited from class java.lang.Object

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

Field Details

nullBehaviour

protected SwitchDefaultNonLazy.NullBehaviour nullBehaviour

Constructor Details

SwitchDefaultNonLazy

public SwitchDefaultNonLazy()

Default switch statement. Exceptions are thrown if first argument is null.

SwitchDefaultNonLazy

public SwitchDefaultNonLazy(SwitchDefaultNonLazy.NullBehaviour nullBehaviour)

Switch function with defined null behaviour.

Parameters:

nullBehaviour - action to take if first argument is null.

Since:

Jep 3.5

Method Details

checkNumberOfParameters

public boolean checkNumberOfParameters(int n)

Description copied from class: PostfixMathCommand

Checks the number of parameters of the function. Functions which set numberOfParameter=-1 should overload this method

Specified by:

checkNumberOfParameters in interface PostfixMathCommandI

Overrides:

checkNumberOfParameters in class PostfixMathCommand

Parameters:

n - number of parameters function will be called with.

Returns:

false if an illegal number of parameters is supplied, true otherwise.

getNullBehaviour

public SwitchDefaultNonLazy.NullBehaviour getNullBehaviour()

Behaviour when passed zero arguments.

Returns:

code indicating behaviour type

Since:

Jep 3.5

eval

public Object eval(Object[] args)
            throws EvaluationException

Description copied from class: NaryFunction

Evaluate the function

Specified by:

eval in class NaryFunction

Parameters:

args - arguments to the function

Returns:

value returned by the function

Throws:

EvaluationException - if the calculation cannot be performed