com.aol.cyclops.internal.comprehensions.comprehenders

Class OptionalComprehender

java.lang.Object

com.aol.cyclops.internal.comprehensions.comprehenders.OptionalComprehender

All Implemented Interfaces:

Comprehender<java.util.Optional>, ValueComprehender<java.util.Optional>

public class OptionalComprehender
extends java.lang.Object
implements ValueComprehender<java.util.Optional>

Constructor Summary

Constructors

Constructor and Description
OptionalComprehender()

Method Summary

Modifier and Type	Method and Description
java.util.Optional	empty()
java.lang.Object	filter(java.util.Optional o, java.util.function.Predicate p) Wrapper around filter
java.util.Optional	flatMap(java.util.Optional o, java.util.function.Function fn)
java.lang.Class	getTargetClass()
boolean	instanceOfT(java.lang.Object apply)
java.lang.Object	map(java.util.Optional o, java.util.function.Function fn) Wrapper around map
java.util.Optional	of(java.lang.Object o)
java.lang.Object	resolveForCrossTypeFlatMap(Comprehender comp, java.util.Optional apply) Answers the question how should this type behave when returned in a flatMap function by another type? For example - Optional uses comp.of(opt.get()) when a value is present and comp.empty() when no value is present.

Methods inherited from class java.lang.Object

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

Methods inherited from interface com.aol.cyclops.types.extensability.ValueComprehender

fromIterator

Methods inherited from interface com.aol.cyclops.types.extensability.Comprehender

executeflatMap, liftAndFlatMap, liftObject, priority, unwrap, unwrapOtherMonadTypes

Constructor Detail

OptionalComprehender

public OptionalComprehender()

Method Detail

getTargetClass

public java.lang.Class getTargetClass()

Specified by:

getTargetClass in interface Comprehender<java.util.Optional>

filter

public java.lang.Object filter(java.util.Optional o,
                               java.util.function.Predicate p)

Description copied from interface: Comprehender

Wrapper around filter

Specified by:

filter in interface Comprehender<java.util.Optional>

Parameters:

o - Monadic type being wrapped

p - JDK Predicate to wrap

Returns:

Result of call to

 t.filter ( i -> p.test(i)); 

map

public java.lang.Object map(java.util.Optional o,
                            java.util.function.Function fn)

Description copied from interface: Comprehender

Wrapper around map

Specified by:

map in interface Comprehender<java.util.Optional>

Parameters:

o - Monadic type being wrapped

fn - JDK Function to wrap

Returns:

Result of call to

 t.map( i -> fn.apply(i)); 

flatMap

public java.util.Optional flatMap(java.util.Optional o,
                                  java.util.function.Function fn)

Specified by:

flatMap in interface Comprehender<java.util.Optional>

instanceOfT

public boolean instanceOfT(java.lang.Object apply)

Specified by:

instanceOfT in interface Comprehender<java.util.Optional>

of

public java.util.Optional of(java.lang.Object o)

Specified by:

of in interface Comprehender<java.util.Optional>

empty

public java.util.Optional empty()

Specified by:

empty in interface Comprehender<java.util.Optional>

resolveForCrossTypeFlatMap

public java.lang.Object resolveForCrossTypeFlatMap(Comprehender comp,
                                                   java.util.Optional apply)

Description copied from interface: Comprehender

Answers the question how should this type behave when returned in a flatMap function by another type? For example - Optional uses comp.of(opt.get()) when a value is present and comp.empty() when no value is present.

Specified by:

resolveForCrossTypeFlatMap in interface Comprehender<java.util.Optional>

Returns: