Package org.nuxeo.ecm.core.blob

Class BlobStore.OptionalOrUnknown<T>

java.lang.Object

org.nuxeo.ecm.core.blob.BlobStore.OptionalOrUnknown<T>

Enclosing interface:

BlobStore

public static class BlobStore.OptionalOrUnknown<T>
extends Object

A class representing an unknown value, a missing value, or a present (non-null) value.

Method Summary

Modifier and Type	Method	Description
boolean	equals(Object obj)
T	get()	Returns the value if it is present, otherwise throws NoSuchElementException.
int	hashCode()
boolean	isKnown()	Returns true if the value is known (missing or present), otherwise false.
boolean	isMissing()	Returns true if the value is missing, otherwise false.
boolean	isPresent()	Returns true if the value is present, otherwise false.
boolean	isUnknown()	Returns true if the value is unknown, otherwise false.
static <T> BlobStore.OptionalOrUnknown<T>	missing()	Returns a missing instance.
static <T> BlobStore.OptionalOrUnknown<T>	of(T value)	Returns an instance of a present, non-null value.
static <T> BlobStore.OptionalOrUnknown<T>	unknown()	Returns an unknown instance.

Methods inherited from class java.lang.Object

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

Method Details

unknown

public static <T> BlobStore.OptionalOrUnknown<T> unknown()

Returns an unknown instance.

missing

public static <T> BlobStore.OptionalOrUnknown<T> missing()

Returns a missing instance.

of

public static <T> BlobStore.OptionalOrUnknown<T> of(T value)

Returns an instance of a present, non-null value.

isUnknown

public boolean isUnknown()

Returns true if the value is unknown, otherwise false.

isKnown

public boolean isKnown()

Returns true if the value is known (missing or present), otherwise false.

isPresent

public boolean isPresent()

Returns true if the value is present, otherwise false.

isMissing

public boolean isMissing()

Returns true if the value is missing, otherwise false.

get

@NotNull
public T get()

Returns the value if it is present, otherwise throws NoSuchElementException.

Throws:

NoSuchElementException - if there is no value present

equals

public boolean equals(Object obj)

Overrides:

equals in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object