io.requery.query

Class BaseScalar<E>

java.lang.Object

io.requery.query.BaseScalar<E>

Type Parameters:

E - type of scalar value

All Implemented Interfaces:

Scalar<E>, Callable<E>

public abstract class BaseScalar<E>
extends Object
implements Scalar<E>

Single result value that is given by a Supplier.

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	BaseScalar(Executor executor)

Method Summary

Modifier and Type	Method and Description
E	call()
void	consume(Consumer<? super E> action) Consume the result with the given Consumer.
protected abstract E	evaluate()
CompletableFuture<E>	toCompletableFuture()
CompletableFuture<E>	toCompletableFuture(Executor executor)
Supplier<E>	toSupplier()
E	value()

Methods inherited from class java.lang.Object

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

Constructor Detail

BaseScalar

protected BaseScalar(Executor executor)

Method Detail

evaluate

protected abstract E evaluate()

value

public E value()

Specified by:

value in interface Scalar<E>

Returns:

the scalar value, causing the query to be executed.

call

public E call()
       throws Exception

Specified by:

call in interface Scalar<E>

Specified by:

call in interface Callable<E>

Returns:

the scalar value, causing the query to be executed.

Throws:

Exception

consume

public void consume(Consumer<? super E> action)

Description copied from interface: Scalar

Consume the result with the given Consumer.

Specified by:

consume in interface Scalar<E>

Parameters:

action - to receive the elements in this result.

toCompletableFuture

public CompletableFuture<E> toCompletableFuture()

Specified by:

toCompletableFuture in interface Scalar<E>

Returns:

CompletableFuture computing the result.

toCompletableFuture

public CompletableFuture<E> toCompletableFuture(Executor executor)

Specified by:

toCompletableFuture in interface Scalar<E>

Parameters:

executor - to perform the operation

Returns:

CompletableFuture computing the result.

toSupplier

public Supplier<E> toSupplier()

Specified by:

toSupplier in interface Scalar<E>

Returns:

Supplier for the result of this query.