Module org.seasar.doma.core

Package org.seasar.doma.jdbc.aggregate

Class AggregateCommand<RESULT,ENTITY>

java.lang.Object

org.seasar.doma.jdbc.aggregate.AggregateCommand<RESULT,ENTITY>

Type Parameters:

RESULT - the result type of the aggregation

ENTITY - the root entity type used within the aggregation

All Implemented Interfaces:

Command<RESULT>

public class AggregateCommand<RESULT,ENTITY>
extends Object
implements Command<RESULT>

The AggregateCommand class represents a command designed to execute an aggregate operation on a stream of entities and return a result.

Constructor Summary

Constructors

Constructor	Description
AggregateCommand(SelectQuery query, EntityType<ENTITY> rootEntityType, StreamReducer<RESULT,ENTITY> streamReducer, AggregateStrategyType aggregateStrategyType)

Method Summary

Modifier and Type	Method	Description
RESULT	execute()	Executes the command and returns the result.
Query	getQuery()	Returns the query associated with this command.

Methods inherited from class java.lang.Object

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

Constructor Details

AggregateCommand

public AggregateCommand(SelectQuery query,
 EntityType<ENTITY> rootEntityType,
 StreamReducer<RESULT,ENTITY> streamReducer,
 AggregateStrategyType aggregateStrategyType)

Method Details

execute

public RESULT execute()

Description copied from interface: Command

Executes the command and returns the result.

This method is responsible for executing the database operation encapsulated by this command. It handles the execution of the SQL statement, processing of results, and any necessary resource management.

Specified by:

execute in interface Command<RESULT>

Returns:

the result of executing the command, the type depends on the specific command implementation

getQuery

public Query getQuery()

Description copied from interface: Command

Returns the query associated with this command.

The query contains the SQL statement and parameters that will be executed by this command.

Specified by:

getQuery in interface Command<RESULT>

Returns:

the query object that this command will execute