sirius.db.jdbc.batch

Class FindQuery<E extends SQLEntity>

java.lang.Object

sirius.db.jdbc.batch.BatchQuery<E>

sirius.db.jdbc.batch.FindQuery<E>

Type Parameters:

E - the generic type of entities to find with this query

public class FindQuery<E extends SQLEntity>
extends BatchQuery<E>

Represents a batch query which finds and entity in the database.

A query is created by enumerating which mappings to compare in order to identify the entity. The query is then supplied with an example entity from which the search values are derived.

Field Summary

Fields inherited from class sirius.db.jdbc.batch.BatchQuery

avarage, batchBacklog, batchBacklogLimit, context, descriptor, mappings, MAX_BATCH_BACKLOG, mixing, oma, properties, query, stmt, type

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	FindQuery(BatchContext context, Class<E> type, String[] mappings)

Method Summary

Modifier and Type	Method and Description
protected void	buildSQL() Determines the SQL statement to prepare in BatchQuery.prepareStmt().
Optional<E>	find(E example) Tries to find a real database entity where the mappings to compare match the given example entity.

Methods inherited from class sirius.db.jdbc.batch.BatchQuery

addBatch, close, commit, createStmt, getDescriptor, getProperties, prepareStmt, safeClose, toString, tryCommit, withCustomBatchLimit

Methods inherited from class java.lang.Object

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

Constructor Detail

FindQuery

protected FindQuery(BatchContext context,
                    Class<E> type,
                    String[] mappings)

Method Detail

find

@Nonnull
public Optional<E> find(@Nonnull
                                 E example)

Tries to find a real database entity where the mappings to compare match the given example entity.

Parameters:

example - the example entity to search by

Returns:

the matching entity wrapped as optional or an empty optional if no match was found

buildSQL

protected void buildSQL()
                 throws SQLException

Description copied from class: BatchQuery

Determines the SQL statement to prepare in BatchQuery.prepareStmt().

Specified by:

buildSQL in class BatchQuery<E extends SQLEntity>

Throws:

SQLException - in case of a database error