Enum Class SelectAllQueryGenerator

java.lang.Object

java.lang.Enum<SelectAllQueryGenerator>

dimstyl.orm.internal.sql.generator.SelectAllQueryGenerator

All Implemented Interfaces:

SqlQueryGenerator<Optional<String>,RepositoryMetadata>, Serializable, Comparable<SelectAllQueryGenerator>, Constable

enum SelectAllQueryGenerator
extends Enum<SelectAllQueryGenerator>
implements SqlQueryGenerator<Optional<String>,RepositoryMetadata>

Generates an SQL `SELECT * FROM` query for retrieving all records from a table.

This generator ensures that the repository supports the `SELECT_ALL` operation before creating the query. If the operation is not supported, query generation is skipped.

Nested Class Summary

Nested classes/interfaces inherited from class java.lang.Enum

Enum.EnumDesc<E extends Enum<E>>

Enum Constant Summary

Enum Constants

Enum Constant	Description
INSTANCE	The singleton instance of the SelectAllQueryGenerator.

Constructor Summary

Constructors

Modifier	Constructor	Description
private	SelectAllQueryGenerator()

Method Summary

Modifier and Type	Method	Description
Optional<String>	generate(RepositoryMetadata repositoryMetadata)	Generates an SQL `SELECT * FROM` query if the repository supports the `SELECT_ALL` operation.
static SelectAllQueryGenerator	valueOf(String name)	Returns the enum constant of this class with the specified name.
static SelectAllQueryGenerator[]	values()	Returns an array containing the constants of this enum class, in the order they are declared.

Methods inherited from class java.lang.Enum

clone, compareTo, describeConstable, equals, finalize, getDeclaringClass, hashCode, name, ordinal, toString, valueOf

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Enum Constant Details

INSTANCE

public static final SelectAllQueryGenerator INSTANCE

The singleton instance of the SelectAllQueryGenerator.

Constructor Details

SelectAllQueryGenerator

private SelectAllQueryGenerator()

Method Details

values

public static SelectAllQueryGenerator[] values()

Returns an array containing the constants of this enum class, in the order they are declared.

Returns:

an array containing the constants of this enum class, in the order they are declared

valueOf

public static SelectAllQueryGenerator valueOf(String name)

Returns the enum constant of this class with the specified name. The string must match exactly an identifier used to declare an enum constant in this class. (Extraneous whitespace characters are not permitted.)

Parameters:

name - the name of the enum constant to be returned.

Returns:

the enum constant with the specified name

Throws:

IllegalArgumentException - if this enum class has no constant with the specified name

NullPointerException - if the argument is null

generate

public Optional<String> generate(RepositoryMetadata repositoryMetadata)

Generates an SQL `SELECT * FROM` query if the repository supports the `SELECT_ALL` operation.

If the repository does not support this operation, query generation is skipped, and an empty Optional is returned.

Specified by:

generate in interface SqlQueryGenerator<Optional<String>,RepositoryMetadata>

Parameters:

repositoryMetadata - Metadata containing information about the repository, including the table name and supported operations, as defined by RepositoryMetadata.

Returns:

An Optional containing the SQL query if the `SELECT_ALL` operation is supported, otherwise an empty Optional.