Module litebridge.orm

Package org.litebridgedb.orm.engine

Class SelectEngine

java.lang.Object

org.litebridgedb.orm.engine.SelectEngine

All Implemented Interfaces:

SelectApi

public class SelectEngine
extends Object
implements SelectApi

Constructor Summary

Constructors

Constructor	Description
SelectEngine(FromClauseEngine fromClauseEngine)

Method Summary

Modifier and Type	Method	Description
FromClauseStart	select()	Query data from the database, without mapping results to Data Transfer Object (DTOs).
<DTO> DtoFromClauseTerminal<DTO>	select(Class<DTO> dtoClass)	Select a registered Data Transfer Object (DTO) type for database query operations.
<DTO> DtoFromClauseTerminal<DTO>	select(Class<DTO> dtoClass, Class<?> contextDtoClass)	Select a contextually-registered Data Transfer Object (DTO) type for database query operations.
<DTO> DtoFromClauseTerminal<DTO>	select(Class<DTO> dtoClass, @Nullable RelatedDtoStrategy relatedDtoStrategy)	Select a registered Data Transfer Object (DTO) type for database query operations.
FromClauseStart	select(String... fieldsOrColumns)	Query data from the database, without mapping results to Data Transfer Objects (DTOs).
FromClauseStart	select(ExpressionSpec... expressions)	Query data from the database, without mapping results to Data Transfer Objects (DTOs).
<T> FromClauseStartTypeOverride<T>	select(TypeOverride<T> expression)	Query data from the database, without mapping results to Data Transfer Objects (DTOs).

Methods inherited from class java.lang.Object

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

Constructor Details

SelectEngine

public SelectEngine(FromClauseEngine fromClauseEngine)

Method Details

select

public <DTO> DtoFromClauseTerminal<DTO> select(Class<DTO> dtoClass)

Description copied from interface: SelectApi

Select a registered Data Transfer Object (DTO) type for database query operations.

Shortcut method; equivalent to select().from(dtoClass).

Specified by:

select in interface SelectApi

Type Parameters:

DTO - The type of the DTO to select.

Parameters:

dtoClass - The class of the DTO to be queried, which must already be registered.

Returns:

A DtoFromClauseTerminal instance for querying and retrieving data for the specified DTO class.

select

public <DTO> DtoFromClauseTerminal<DTO> select(Class<DTO> dtoClass,
 @Nullable RelatedDtoStrategy relatedDtoStrategy)

Description copied from interface: SelectApi

Select a registered Data Transfer Object (DTO) type for database query operations.

Shortcut method; equivalent to select().from(dtoClass, relatedDtoStrategy).

Specified by:

select in interface SelectApi

Type Parameters:

DTO - The type of the DTO to select.

Parameters:

dtoClass - The class of the DTO to be queried, which must already be registered.

Returns:

A DtoFromClauseTerminal instance for querying and retrieving data for the specified DTO class.

select

public <DTO> DtoFromClauseTerminal<DTO> select(Class<DTO> dtoClass,
 Class<?> contextDtoClass)

Description copied from interface: SelectApi

Select a contextually-registered Data Transfer Object (DTO) type for database query operations.

Shortcut method; equivalent to select().from(dtoClass, contextDtoClass).

Specified by:

select in interface SelectApi

Type Parameters:

DTO - The type of the DTO to select.

Parameters:

dtoClass - The class of the DTO to be queried, which must already be registered.

Returns:

A DtoFromClauseTerminal instance for querying and retrieving data for the specified DTO class.

select

public FromClauseStart select(String... fieldsOrColumns)

Description copied from interface: SelectApi

Query data from the database, without mapping results to Data Transfer Objects (DTOs).

Creates a SQL SELECT statement with the specified fields/expressions; the source table is specified via a chained from() call.

This method constructs a FromClauseStartTypeOverride for further query composition by specifying the target DTO or table for the query.

Specified by:

select in interface SelectApi

Parameters:

fieldsOrColumns - An array of field/column names to be included in the SELECT statement, dependent on whether a DTO or raw SQL is selected in the chained from() call. Each field/column name must be a valid, non-null string.

Returns:

A FromClauseStartTypeOverride instance allowing further refinement of the SQL query by specifying the target DTO or table.

select

public FromClauseStart select(ExpressionSpec... expressions)

Description copied from interface: SelectApi

Query data from the database, without mapping results to Data Transfer Objects (DTOs).

Creates a SQL SELECT statement with the specified fields/expressions; the source table is specified via a chained from() call.

This method constructs a FromClauseStartTypeOverride for further query composition by specifying the target DTO or table for the query.

Specified by:

select in interface SelectApi

Parameters:

expressions - An array of ExpressionSpec objects representing the expressions to be part of the SELECT statement.

Returns:

A FromClauseStartTypeOverride instance allowing further refinement of the SQL query by specifying the target DTO or table.

select

public <T> FromClauseStartTypeOverride<T> select(TypeOverride<T> expression)

Description copied from interface: SelectApi

Query data from the database, without mapping results to Data Transfer Objects (DTOs).

Creates a SQL SELECT statement with the specified fields/expressions; the source table is specified via a chained from() call.

This method constructs a FromClauseStartTypeOverride for further query composition by specifying the target DTO or table for the query.

Specified by:

select in interface SelectApi

Type Parameters:

T - The return type of the query

Parameters:

expression - Return type-overriding expression

Returns:

A FromClauseStartTypeOverride instance allowing further refinement of the SQL query by specifying the target DTO or table.

select

public FromClauseStart select()

Description copied from interface: SelectApi

Query data from the database, without mapping results to Data Transfer Object (DTOs).

Creates a SQL SELECT statement with all fields/expressions. The source table is specified via a chained from() call.

This method constructs a FromClauseStartTypeOverride for further query composition by specifying the target DTO or table for the query.

Specified by:

select in interface SelectApi

Returns:

A FromClauseStartTypeOverride instance allowing further refinement of the SQL query by specifying the target DTO or table.