Package com.singularsys.extensions.lambda

Class StandardListProcessor

java.lang.Object

com.singularsys.extensions.lambda.StandardListProcessor

All Implemented Interfaces:

ListProcessor, JepComponent, Serializable

Direct Known Subclasses:

MatrixListProcessor, PaddingListProcessor

public class StandardListProcessor
extends Object
implements ListProcessor

Default implementation of a ListProcessor. Works with the standard Jep List and Ele functions which use Vector<Object> for lists.

See Also:

• Serialized Form

Constructor Summary

Constructors

Constructor	Description
StandardListProcessor()

Method Summary

Modifier and Type	Method	Description
Iterable<Object>	fromArgs(Object arg)	Returns an iterable view of the input arguments.
Object	fromCollection(Collection<Object> tree)	Convert a general collection into a type used the Jep environment.
Object	fromList(List<Object> list)	Convert a list produced by ListProcessor.makeList() to the type used by Jep environment.
JepComponent	getLightWeightInstance()	Gets a light-weight instance suitable for using in multiple threads.
void	init(Jep jep)	Initialize the component.
List<Object>	makeList()	Get an empty list which elements can be added.

Methods inherited from class java.lang.Object

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

Constructor Details

StandardListProcessor

public StandardListProcessor()

Method Details

init

public void init(Jep jep)

Description copied from interface: JepComponent

Initialize the component. This method 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

fromArgs

public Iterable<Object> fromArgs(Object arg)
                          throws EvaluationException

Description copied from interface: ListProcessor

Returns an iterable view of the input arguments.

Specified by:

fromArgs in interface ListProcessor

Parameters:

arg - typically a list, but can be any type. If the type is not a list, an iterator with a single element is returned.

Returns:

an Iterable view of the argument

Throws:

EvaluationException - on error

makeList

public List<Object> makeList()

Description copied from interface: ListProcessor

Get an empty list which elements can be added.

Specified by:

makeList in interface ListProcessor

Returns:

an empty list

fromList

public Object fromList(List<Object> list)
                throws EvaluationException

Description copied from interface: ListProcessor

Convert a list produced by ListProcessor.makeList() to the type used by Jep environment. Some implementations just return the input.

Specified by:

fromList in interface ListProcessor

Parameters:

list - a list

Returns:

a type suitable for use by Jep.

Throws:

EvaluationException - on error

fromCollection

public Object fromCollection(Collection<Object> tree)
                      throws EvaluationException

Description copied from interface: ListProcessor

Convert a general collection into a type used the Jep environment.

Specified by:

fromCollection in interface ListProcessor

Parameters:

tree - input collection

Returns:

a type suitable for use by Jep

Throws:

EvaluationException - on error

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 a new instance, null or 'this'.