org.springframework.data.cassandra.core

Interface ExecutableSelectOperation.TerminatingSelect<T>

All Known Subinterfaces:

ExecutableSelectOperation.ExecutableSelect<T>, ExecutableSelectOperation.SelectWithProjection<T>, ExecutableSelectOperation.SelectWithQuery<T>, ExecutableSelectOperation.SelectWithTable<T>

Enclosing interface:

ExecutableSelectOperation

public static interface ExecutableSelectOperation.TerminatingSelect<T>

Trigger SELECT query execution by calling one of the terminating methods.

Method Summary

Modifier and Type	Method and Description
List<T>	all() Get all matching elements.
long	count() Get the number of matching elements.
default boolean	exists() Check for the presence of matching elements.
default Optional<T>	first() Get the first result, or no result.
T	firstValue() Get the first result, or no result.
default Optional<T>	one() Get exactly zero or one result.
T	oneValue() Get exactly zero or one result.
default Stream<T>	stream() Stream all matching elements.

Method Detail

count

long count()

Get the number of matching elements.

Returns:

total number of matching elements.

exists

default boolean exists()

Check for the presence of matching elements.

Returns:

true if at least one matching element exists.

See Also:

count()

first

default Optional<T> first()

Get the first result, or no result.

Returns:

the first result or Optional.empty() if no match found.

See Also:

firstValue()

firstValue

@Nullable
T firstValue()

Get the first result, or no result.

Returns:

the first result or null if no match found.

one

default Optional<T> one()

Get exactly zero or one result.

Returns:

a single result or Optional.empty() if no match found.

Throws:

IncorrectResultSizeDataAccessException - if more than one match found.

See Also:

oneValue()

oneValue

@Nullable
T oneValue()

Get exactly zero or one result.

Returns:

the single result or null if no match found.

Throws:

IncorrectResultSizeDataAccessException - if more than one match found.

all

List<T> all()

Get all matching elements.

Returns:

a List of all the matching elements; never null.

See Also:

List

stream

default Stream<T> stream()

Stream all matching elements.

Returns:

a Stream wrapping the Cassandra ResultSet, which needs to be closed; never null.

See Also:

Stream, all()