net.kemitix.conditional

Interface Value

public interface Value

A Value from an if-then-else in a functional-style.

Author:

Paul Campbell (pcampbell@kemitix.net).

Nested Class Summary

Nested Classes

Modifier and Type	Interface and Description
static interface	Value.ValueClause<T> An intermediate state in determining the final Value.

Method Summary

Modifier and Type	Method and Description
static <T> Value.ValueClause<T>	where(boolean clause) Create a new Value.ValueClause for the clause.
static <T> Optional<T>	where(boolean clause, Supplier<T> trueSupplier) Return an Optional either containing a value, if the clause is true, or empty.
static <T> T	where(boolean clause, Supplier<T> trueSupplier, Supplier<T> falseSupplier) Return one of two values depending on the value of a clause.
static <T> Value.ValueClause<T>	where(Condition clause) Create a new Value.ValueClause for the clause.
static <T> Optional<T>	where(Condition clause, Supplier<T> trueSupplier) Return an Optional either containing a value, if the clause is true, or empty.
static <T> T	where(Condition clause, Supplier<T> trueSupplier, Supplier<T> falseSupplier) Return one of two values depending on the value of a clause.

Method Detail

where

static <T> T where(boolean clause,
                   Supplier<T> trueSupplier,
                   Supplier<T> falseSupplier)

Return one of two values depending on the value of a clause.

Type Parameters:

T - The type of the value

Parameters:

clause - The deciding clause

trueSupplier - The supplier to provide the value when the clause is true

falseSupplier - The supplier to provide the value when the clause is false

Returns:

the value from either the trueSupplier or the falseSupplier

where

static <T> T where(Condition clause,
                   Supplier<T> trueSupplier,
                   Supplier<T> falseSupplier)

Return one of two values depending on the value of a clause.

Type Parameters:

T - The type of the value

Parameters:

clause - The deciding clause

trueSupplier - The supplier to provide the value when the clause is true

falseSupplier - The supplier to provide the value when the clause is false

Returns:

the value from either the trueSupplier or the falseSupplier

where

static <T> Optional<T> where(boolean clause,
                             Supplier<T> trueSupplier)

Return an Optional either containing a value, if the clause is true, or empty.

Type Parameters:

T - The type of the value

Parameters:

clause - The deciding clause

trueSupplier - The supplier to provide the value when the clause is true

Returns:

an Optional either containing the value from the trueSupplier or empty

where

static <T> Optional<T> where(Condition clause,
                             Supplier<T> trueSupplier)

Return an Optional either containing a value, if the clause is true, or empty.

Type Parameters:

T - The type of the value

Parameters:

clause - The deciding clause

trueSupplier - The supplier to provide the value when the clause is true

Returns:

an Optional either containing the value from the trueSupplier or empty

where

static <T> Value.ValueClause<T> where(boolean clause)

Create a new Value.ValueClause for the clause.

Type Parameters:

T - the type of the value

Parameters:

clause - the condition to test

Returns:

a true or false value clause

where

static <T> Value.ValueClause<T> where(Condition clause)

Create a new Value.ValueClause for the clause.

Type Parameters:

T - the type of the value

Parameters:

clause - the condition to test

Returns:

a true or false value clause