Module org.postgresql.pljava.internal

Package org.postgresql.pljava.internal

Class Checked.OptionalBase

java.lang.Object

org.postgresql.pljava.internal.Checked.OptionalBase

Direct Known Subclasses:

Checked.OptionalBoolean, Checked.OptionalByte, Checked.OptionalChar, Checked.OptionalFloat, Checked.OptionalShort

Enclosing interface:

Checked<WT,EX extends Throwable>

public abstract static class Checked.OptionalBase
extends Object

Head of a family of Optional-like types covering the Java primitives that the java.util.Optional... classes do not cover, and whose methods that expect functional interfaces will accept the checked-exception versions declared here.

Each OptionalFoo class here should be treated as if it were a Java "value-based" class; that they might have this class as an ancestor, or any superclass/subclass relationships at all, may change and should not be relied on. It may be convenient to import static the ofNullable methods of this class, however, which even cover the java.util-supplied primitive optionals.

Constructor Summary

Constructors

Constructor	Description
OptionalBase()

Method Summary

Modifier and Type	Method	Description
boolean	equals(Object obj)
int	hashCode()
boolean	isPresent()	If a value is present, returns true, otherwise false.
static Checked.OptionalBoolean	ofNullable(Boolean value)	Return an OptionalBoolean representing the argument, empty if the argument is null.
static Checked.OptionalByte	ofNullable(Byte value)	Return an OptionalByte representing the argument, empty if the argument is null.
static Checked.OptionalChar	ofNullable(Character value)	Return an OptionalChar representing the argument, empty if the argument is null.
static OptionalDouble	ofNullable(Double value)	Return an OptionalDouble representing the argument, empty if the argument is null.
static Checked.OptionalFloat	ofNullable(Float value)	Return an OptionalFloat representing the argument, empty if the argument is null.
static OptionalInt	ofNullable(Integer value)	Return an OptionalInt representing the argument, empty if the argument is null.
static OptionalLong	ofNullable(Long value)	Return an OptionalLong representing the argument, empty if the argument is null.
static Checked.OptionalShort	ofNullable(Short value)	Return an OptionalShort representing the argument, empty if the argument is null.
String	toString()

Methods inherited from class java.lang.Object

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

Constructor Details

OptionalBase

public OptionalBase()

Method Details

isPresent

public boolean isPresent()

If a value is present, returns true, otherwise false.

equals

public boolean equals(Object obj)

Overrides:

equals in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object

toString

public String toString()

Overrides:

toString in class Object

ofNullable

public static OptionalDouble ofNullable(Double value)

Return an OptionalDouble representing the argument, empty if the argument is null.

ofNullable

public static OptionalInt ofNullable(Integer value)

Return an OptionalInt representing the argument, empty if the argument is null.

ofNullable

public static OptionalLong ofNullable(Long value)

Return an OptionalLong representing the argument, empty if the argument is null.

ofNullable

public static Checked.OptionalBoolean ofNullable(Boolean value)

Return an OptionalBoolean representing the argument, empty if the argument is null.

ofNullable

public static Checked.OptionalByte ofNullable(Byte value)

Return an OptionalByte representing the argument, empty if the argument is null.

ofNullable

public static Checked.OptionalShort ofNullable(Short value)

Return an OptionalShort representing the argument, empty if the argument is null.

ofNullable

public static Checked.OptionalChar ofNullable(Character value)

Return an OptionalChar representing the argument, empty if the argument is null.

ofNullable

public static Checked.OptionalFloat ofNullable(Float value)

Return an OptionalFloat representing the argument, empty if the argument is null.