com.atlassian.confluence.core
Class MaybeNot<T>

java.lang.Object
  com.atlassian.confluence.core.MaybeNot<T>

Type Parameters:

T - the type Maybe is wrapping

All Implemented Interfaces:

com.atlassian.fugue.Effect.Applicant<T>, com.atlassian.fugue.Maybe<T>, com.google.common.base.Supplier<T>, java.lang.Iterable<T>

public abstract class MaybeNot<T>
extends java.lang.Object
implements com.atlassian.fugue.Maybe<T>

Helps constructing the left, erroneous case of a Maybe.

Since:

5.2

Method Summary

static <T> com.atlassian.fugue.Maybe<T>	becauseOf(java.lang.String message, java.lang.Object... args) Constructs a Maybe which will escape with the given message on a Maybe.get() call.
static <T> com.atlassian.fugue.Maybe<T>	becauseOfException(java.lang.Exception exception) Constructs a Maybe which will escape with the given exception on a Maybe.get() call.
static <T> com.atlassian.fugue.Maybe<T>	becauseOfNoResult(com.atlassian.fugue.Maybe<?> maybe) Will cast the given Maybe to one with the expected parametrisation.
boolean	exists(com.google.common.base.Predicate<T> p)
boolean	forall(com.google.common.base.Predicate<T> p)
void	foreach(com.atlassian.fugue.Effect<T> effect)
<B extends T> T	getOrElse(B other)
T	getOrElse(com.google.common.base.Supplier<T> supplier)
T	getOrError(com.google.common.base.Supplier<java.lang.String> msg)
T	getOrNull()
boolean	isDefined()
boolean	isEmpty()
java.util.Iterator<T>	iterator()

Methods inherited from class java.lang.Object

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

Methods inherited from interface com.atlassian.fugue.Maybe

get

Method Detail

becauseOfNoResult

public static <T> com.atlassian.fugue.Maybe<T> becauseOfNoResult(com.atlassian.fugue.Maybe<?> maybe)

Will cast the given Maybe to one with the expected parametrisation.

This has to be Maybe.isEmpty() since it is expected to escape on a Maybe.get() call.

Parameters:

maybe - to be casted to the target type

Returns:

the casted Maybe adhering to the taget type

becauseOf

public static <T> com.atlassian.fugue.Maybe<T> becauseOf(java.lang.String message,
                                                         java.lang.Object... args)

Constructs a Maybe which will escape with the given message on a Maybe.get() call.

Parameters:

message - the message used for the escape, may be formatted for application of String.format(String, Object...)

args - the arguments used for formatting the message, may be null

Returns:

the Maybe escaping on realization

becauseOfException

public static <T> com.atlassian.fugue.Maybe<T> becauseOfException(java.lang.Exception exception)

Constructs a Maybe which will escape with the given exception on a Maybe.get() call.

Parameters:

exception - the exception to be thrown, will be nested in a RuntimeException if it is checked

Returns:

getOrError

public T getOrError(com.google.common.base.Supplier<java.lang.String> msg)

Specified by:

getOrError in interface com.atlassian.fugue.Maybe<T>

getOrElse

public T getOrElse(com.google.common.base.Supplier<T> supplier)

Specified by:

getOrElse in interface com.atlassian.fugue.Maybe<T>

getOrElse

public <B extends T> T getOrElse(B other)

Specified by:

getOrElse in interface com.atlassian.fugue.Maybe<T>

foreach

public void foreach(com.atlassian.fugue.Effect<T> effect)

Specified by:

foreach in interface com.atlassian.fugue.Effect.Applicant<T>

getOrNull

public T getOrNull()

Specified by:

getOrNull in interface com.atlassian.fugue.Maybe<T>

exists

public boolean exists(com.google.common.base.Predicate<T> p)

Specified by:

exists in interface com.atlassian.fugue.Maybe<T>

iterator

public java.util.Iterator<T> iterator()

Specified by:

iterator in interface com.atlassian.fugue.Maybe<T>

Specified by:

iterator in interface java.lang.Iterable<T>

forall

public boolean forall(com.google.common.base.Predicate<T> p)

Specified by:

forall in interface com.atlassian.fugue.Maybe<T>

isEmpty

public boolean isEmpty()

Specified by:

isEmpty in interface com.atlassian.fugue.Maybe<T>

isDefined

public boolean isDefined()

Specified by:

isDefined in interface com.atlassian.fugue.Maybe<T>