Class JxnF2

java.lang.Object

JxnFunction

JxnF2

All Implemented Interfaces:

Comparator, BiConsumer, BiFunction, BinaryOperator, BiPredicate, DoubleBinaryOperator, IntBinaryOperator, LongBinaryOperator, ObjDoubleConsumer, ObjIntConsumer, ObjLongConsumer, ToDoubleBiFunction, ToIntBiFunction, ToLongBiFunction

public class JxnF2
extends JxnFunction
implements Comparator, BiPredicate, BiFunction, ToIntBiFunction, ToLongBiFunction, ToDoubleBiFunction, BinaryOperator, IntBinaryOperator, LongBinaryOperator, DoubleBinaryOperator, BiConsumer, ObjIntConsumer, ObjLongConsumer, ObjDoubleConsumer

The classes JxnF, JxnF2, JxnI, JxnL and JxnD together implement all interfaces of package java.util.function for java.util.stream. This allows to explore and use java → aggregate operations interactively from JXN. JxnF implements all single or zero parameter methods, JxnF2 all double parameter methods and JxnI, JxnL and JxnD methods incompatible with Predicate.

See Also:

AggregateOperations_Demo.jxn

Constructor Summary

Constructors

Constructor	Description
JxnF2(JxnFunction f)	Constructs JxnF2 from an already defined JxnFunction f.
JxnF2(KmgFormelInterpreter fi, String cmd)	Calls constructor JxnFunction( fi, cmd ).

Method Summary

Modifier and Type	Method	Description
void	accept(Object t, double value)	Implements ObjDoubleConsumer for DoubleStream.collect(…).
void	accept(Object t, int value)	Implements ObjIntConsumer for IntStream.collect(…).
void	accept(Object t, long value)	Implements ObjLongConsumer for LongStream.collect(…).
void	accept(Object t, Object u)	Implements BiConsumer for Stream<T>.collect(…), IntStream.collect(…), LongStream.collect(…), DoubleStream.collect(…), Collector.of(…).
Object	apply(Object t, Object u)	Implements BiFunction, BinaryOperator for Stream.reduce(…), Collector.of(…), Collectors.toMap(…), .toConcurrentMap(…), .reducing(…).
double	applyAsDouble(double left, double right)	Implements DoubleBinaryOperator for DoubleStream.reduce(…).
double	applyAsDouble(Object t, Object u)	Implements ToDoubleBiFunction.
int	applyAsInt(int left, int right)	Implements IntBinaryOperator for IntStream.reduce(…).
int	applyAsInt(Object t, Object u)	Implements ToIntBiFunction.
long	applyAsLong(long left, long right)	Implements LongBinaryOperator for LongStream.reduce(…).
long	applyAsLong(Object t, Object u)	Implements ToLongBiFunction.
int	compare(Object o1, Object o2)	Implements Comparator.
protected Object	exec(Object[] args)	Maps args to $_ and the names passed to the constructor via parameterNames.
protected Object	execute(Object o1, Object o2)
boolean	test(Object t, Object u)	Implements BiPredicate.

Methods inherited from interface java.util.function.BiConsumer

andThen

Methods inherited from interface java.util.function.BiFunction

andThen

Methods inherited from interface java.util.function.BinaryOperator

Methods inherited from interface java.util.function.BiPredicate

and, negate, or

Methods inherited from interface java.util.Comparator

equals, reversed, thenComparing, thenComparing, thenComparing, thenComparingDouble, thenComparingInt, thenComparingLong

Methods inherited from class JxnFunction

getArityLenience, getDebug, getShowConditional, getShowInternalResults, setArityLenience, setDebug, setShowConditional, setShowInternalResults, toString

Methods inherited from class java.lang.Object

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

Constructor Detail

JxnF2

public JxnF2(JxnFunction f)

Constructs JxnF2 from an already defined JxnFunction f.
Can be used, if f is defined using jxn special commands: #function f ... #endfunction
Example:

   #function reverse( s1, s2 )
      s2.compareTo(  s1 )  ! reverse order
   #endfunction

   sa = { "DEF", "abc", "XYZ", "ghi", "___" };
   Arrays.sort(sa); sa
    = { DEF, XYZ, ___, abc, ghi } (java.lang.String[5])
   Arrays.sort( sa, @JxnF2( reverse ) ); sa
    = { ghi, abc, ___, XYZ, DEF } (java.lang.String[5])
 

JxnF2

public JxnF2(KmgFormelInterpreter fi,
             String cmd)

Calls constructor JxnFunction( fi, cmd ).
Example:

   sa = { "DEF", "abc", "XYZ", "ghi", "___" };
   Arrays.sort(sa); sa
    = { DEF, XYZ, ___, abc, ghi } (java.lang.String[5])
   Arrays.sort( sa, @JxnF2( $this, "( s1, s2 ) -> s1.compareToIgnoreCase s2" ) ); sa
    = { ___, abc, DEF, ghi, XYZ } (java.lang.String[5])
 

Parameters:

cmd - statement_sequence (one or more statements separated by ';') or #filename[.jxn]. (Note: jxn does not support {…} blocks as possible in java → lambda expressions)

Method Detail

execute

protected Object execute(Object o1,
                         Object o2)

exec

protected Object exec(Object[] args)

Description copied from class: JxnFunction

Maps args to $_ and the names passed to the constructor via parameterNames.
Example:
fn = @JxnFunction( … ) ! calls a constructor to create a function instance fn
:
fn( arg1, arg2, ..., argN ) ! ⇒ jxn internally calls fn.exec( { arg1, arg2, ..., argN } )

Overrides:

exec in class JxnFunction

compare

public int compare(Object o1,
                   Object o2)

Implements Comparator.

Specified by:

compare in interface Comparator

test

public boolean test(Object t,
                    Object u)

Implements BiPredicate.

Specified by:

test in interface BiPredicate

apply

public Object apply(Object t,
                    Object u)

Implements BiFunction, BinaryOperator for Stream.reduce(…), Collector.of(…), Collectors.toMap(…), .toConcurrentMap(…), .reducing(…).

Specified by:

apply in interface BiFunction

applyAsInt

public int applyAsInt(Object t,
                      Object u)

Implements ToIntBiFunction.

Specified by:

applyAsInt in interface ToIntBiFunction

applyAsLong

public long applyAsLong(Object t,
                        Object u)

Implements ToLongBiFunction.

Specified by:

applyAsLong in interface ToLongBiFunction

applyAsDouble

public double applyAsDouble(Object t,
                            Object u)

Implements ToDoubleBiFunction.

Specified by:

applyAsDouble in interface ToDoubleBiFunction

applyAsInt

public int applyAsInt(int left,
                      int right)

Implements IntBinaryOperator for IntStream.reduce(…).

Specified by:

applyAsInt in interface IntBinaryOperator

applyAsLong

public long applyAsLong(long left,
                        long right)

Implements LongBinaryOperator for LongStream.reduce(…).

Specified by:

applyAsLong in interface LongBinaryOperator

applyAsDouble

public double applyAsDouble(double left,
                            double right)

Implements DoubleBinaryOperator for DoubleStream.reduce(…).

Specified by:

applyAsDouble in interface DoubleBinaryOperator

accept

public void accept(Object t,
                   Object u)

Implements BiConsumer for Stream<T>.collect(…), IntStream.collect(…), LongStream.collect(…), DoubleStream.collect(…), Collector.of(…).

Specified by:

accept in interface BiConsumer

accept

public void accept(Object t,
                   int value)

Implements ObjIntConsumer for IntStream.collect(…).

Specified by:

accept in interface ObjIntConsumer

accept

public void accept(Object t,
                   long value)

Implements ObjLongConsumer for LongStream.collect(…).

Specified by:

accept in interface ObjLongConsumer

accept

public void accept(Object t,
                   double value)

Implements ObjDoubleConsumer for DoubleStream.collect(…).

Specified by:

accept in interface ObjDoubleConsumer