com.speedment.runtime.core.util

Class OptionalUtil

java.lang.Object

com.speedment.runtime.core.util.OptionalUtil

public final class OptionalUtil
extends Object

A utility class for converting optional types to their boxed equivalents.

Author:

Emil Forslund, Simon Jonasson

Method Summary

Modifier and Type	Method and Description
static com.speedment.common.function.OptionalBoolean	ofNullable(Boolean b) Wraps the specified nullable value in an OptionalBoolean.
static OptionalDouble	ofNullable(Double d) Wraps the specified nullable value in an OptionalDouble.
static OptionalInt	ofNullable(Integer i) Wraps the specified nullable value in an OptionalInteger.
static OptionalLong	ofNullable(Long l) Wraps the specified nullable value in an OptionalLong.
static com.speedment.common.function.OptionalBoolean	parseBoolean(String value) Parses the specified value into an optional unless it is null, in which case an empty optional is returned.
static OptionalDouble	parseDouble(String value) Parses the specified value into an optional unless it is null, in which case an empty optional is returned.
static OptionalInt	parseInt(String value) Parses the specified value into an optional unless it is null, in which case an empty optional is returned.
static OptionalLong	parseLong(String value) Parses the specified value into an optional unless it is null, in which case an empty optional is returned.
static Object	unwrap(Object potentiallyOptional) If the specified object is an Optional, the inner value will be returned.
static <T> T	unwrap(Optional<T> optional) Returns the inner value of the Optional unless the optional is null, in which case null is returned.
static Boolean	unwrap(com.speedment.common.function.OptionalBoolean optional) Convert an optional value to a boxed one.
static Double	unwrap(OptionalDouble optional) Convert an optional value to a boxed one.
static Integer	unwrap(OptionalInt optional) Convert an optional value to a boxed one.
static Long	unwrap(OptionalLong optional) Convert an optional value to a boxed one.

Methods inherited from class java.lang.Object

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

Method Detail

unwrap

public static Object unwrap(Object potentiallyOptional)

If the specified object is an Optional, the inner value will be returned. Otherwise, the object is returned directly.

Parameters:

potentiallyOptional - the object that might be an Optional

Returns:

the object or its inner value

unwrap

public static <T> T unwrap(Optional<T> optional)

Returns the inner value of the Optional unless the optional is null, in which case null is returned.

Type Parameters:

T - the inner type

Parameters:

optional - the optional

Returns:

the inner value or null

unwrap

public static Integer unwrap(OptionalInt optional)

Convert an optional value to a boxed one. If the inner value is empty, null will be returned.

Parameters:

optional - the optional value (or null)

Returns:

the inner value or null

unwrap

public static Boolean unwrap(com.speedment.common.function.OptionalBoolean optional)

Convert an optional value to a boxed one. If the inner value is empty, null will be returned.

Parameters:

optional - the optional value (or null)

Returns:

the inner value or null

unwrap

public static Long unwrap(OptionalLong optional)

Convert an optional value to a boxed one. If the inner value is empty, null will be returned.

Parameters:

optional - the optional value (or null)

Returns:

the inner value or null

unwrap

public static Double unwrap(OptionalDouble optional)

Convert an optional value to a boxed one. If the inner value is empty, null will be returned.

Parameters:

optional - the optional value (or null)

Returns:

the inner value or null

ofNullable

public static OptionalLong ofNullable(Long l)

Wraps the specified nullable value in an OptionalLong.

Parameters:

l - the value

Returns:

the wrapped optional

ofNullable

public static OptionalInt ofNullable(Integer i)

Wraps the specified nullable value in an OptionalInteger.

Parameters:

i - the value

Returns:

the wrapped optional

ofNullable

public static OptionalDouble ofNullable(Double d)

Wraps the specified nullable value in an OptionalDouble.

Parameters:

d - the value

Returns:

the wrapped optional

ofNullable

public static com.speedment.common.function.OptionalBoolean ofNullable(Boolean b)

Wraps the specified nullable value in an OptionalBoolean.

Parameters:

b - the value

Returns:

the wrapped optional

parseLong

public static OptionalLong parseLong(String value)

Parses the specified value into an optional unless it is null, in which case an empty optional is returned.

Parameters:

value - the value (or null)

Returns:

the wrapped optional

parseInt

public static OptionalInt parseInt(String value)

Parses the specified value into an optional unless it is null, in which case an empty optional is returned.

Parameters:

value - the value (or null)

Returns:

the wrapped optional

parseDouble

public static OptionalDouble parseDouble(String value)

Parses the specified value into an optional unless it is null, in which case an empty optional is returned.

Parameters:

value - the value (or null)

Returns:

the wrapped optional

parseBoolean

public static com.speedment.common.function.OptionalBoolean parseBoolean(String value)

Parses the specified value into an optional unless it is null, in which case an empty optional is returned.

Parameters:

value - the value (or null)

Returns:

the wrapped optional