Package com.singularsys.extensions.stream

Class StreamSourcePfmc

java.lang.Object

com.singularsys.jep.functions.PostfixMathCommand

com.singularsys.jep.functions.NullaryFunction

com.singularsys.extensions.stream.StreamSourcePfmc

All Implemented Interfaces:

PostfixMathCommandI, Serializable

public class StreamSourcePfmc
extends NullaryFunction

A PostfixMathCommandI which returns a stream specified in the constructor. For example

 StreamSourcePfmc source = new StreamSourcePfmc(() -> Stream.of(2,3,5,7,11)));
 jep.addFunction("primes", source);
 Node node = jep.parse("primes() . toList()");
 

On each evaluation the Supplier will generate a new Stream.

See Also:

• Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from class com.singularsys.jep.functions.NullaryFunction

NullaryFunction.SupplierWithException<T>

Field Summary

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

curNumberOfParameters, description, name, NaN, numberOfParameters

Constructor Summary

Constructors

Constructor	Description
StreamSourcePfmc(Supplier<Stream<Object>> factory)

Method Summary

Modifier and Type	Method	Description
Object	eval()	Evaluate the function

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

instanceOf, instanceOf, run

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

asArray, asBool, asDouble, asInt, asLong, asStrictInt, asString, asType, checkNumberOfParameters, 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

Constructor Details

StreamSourcePfmc

public StreamSourcePfmc(Supplier<Stream<Object>> factory)

Method Details

eval

public Object eval()
            throws EvaluationException

Description copied from class: NullaryFunction

Evaluate the function

Specified by:

eval in class NullaryFunction

Returns:

value of the function

Throws:

EvaluationException - if some error at evaluation time