org.unitils.core.dbsupport

Class DefaultSQLHandler

java.lang.Object

org.unitils.core.dbsupport.DefaultSQLHandler

All Implemented Interfaces:

SQLHandler

public class DefaultSQLHandler
extends Object
implements SQLHandler

Class to which database updates and queries are passed. Is in fact a utility class, but is a concrete instance to enable decorating it or switching it with another implementation, allowing things like a dry run, creating a script file or logging updates to a log file or database table.

Author:

Filip Neven, Tim Ducheyne

Constructor Summary

Constructors

Constructor and Description
DefaultSQLHandler(DataSource dataSource) Constructs a new instance that connects to the given DataSource
DefaultSQLHandler(DataSource dataSource, boolean doExecuteUpdates) Constructs a new instance that connects to the given DataSource

Method Summary

Methods

Modifier and Type	Method and Description
void	executeQuery(String sql) Executes the given query.
int	executeUpdate(String sql) Executes the given statement.
int	executeUpdateAndCommit(String sql) Executes the given statement and commits.
boolean	exists(String sql) Returns true if the query returned a record.
DataSource	getDataSource()
long	getItemAsLong(String sql) Returns the long extracted from the result of the given query.
String	getItemAsString(String sql) Returns the value extracted from the result of the given query.
Set<String>	getItemsAsStringSet(String sql) Returns the items extracted from the result of the given query.
boolean	isDoExecuteUpdates()

Methods inherited from class java.lang.Object

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

Constructor Detail

DefaultSQLHandler

public DefaultSQLHandler(DataSource dataSource)

Constructs a new instance that connects to the given DataSource

Parameters:

dataSource - The data source, not null

DefaultSQLHandler

public DefaultSQLHandler(DataSource dataSource,
                 boolean doExecuteUpdates)

Constructs a new instance that connects to the given DataSource

Parameters:

dataSource - The data source, not null

doExecuteUpdates - Boolean indicating whether updates should effectively be executed on the underlying database

Method Detail

executeUpdate

public int executeUpdate(String sql)

Description copied from interface: SQLHandler

Executes the given statement.

Specified by:

executeUpdate in interface SQLHandler

Parameters:

sql - The sql statement

Returns:

The nr of updates

executeQuery

public void executeQuery(String sql)

Description copied from interface: SQLHandler

Executes the given query. Note that no result is returned: this method is only useful in case you want to execute a query that has some desired side-effect (in fact, this method perfoms an update which is disguised as a query ;-) )

Specified by:

executeQuery in interface SQLHandler

Parameters:

sql - The sql query

executeUpdateAndCommit

public int executeUpdateAndCommit(String sql)

Description copied from interface: SQLHandler

Executes the given statement and commits.

Specified by:

executeUpdateAndCommit in interface SQLHandler

Parameters:

sql - The sql statement

Returns:

The nr of updates

getItemAsLong

public long getItemAsLong(String sql)

Description copied from interface: SQLHandler

Returns the long extracted from the result of the given query. If no value is found, a UnitilsException is thrown.

Specified by:

getItemAsLong in interface SQLHandler

Parameters:

sql - The sql string for retrieving the items

Returns:

The long item value

getItemAsString

public String getItemAsString(String sql)

Description copied from interface: SQLHandler

Returns the value extracted from the result of the given query. If no value is found, a UnitilsException is thrown.

Specified by:

getItemAsString in interface SQLHandler

Parameters:

sql - The sql string for retrieving the items

Returns:

The string item value

getItemsAsStringSet

public Set<String> getItemsAsStringSet(String sql)

Description copied from interface: SQLHandler

Returns the items extracted from the result of the given query.

Specified by:

getItemsAsStringSet in interface SQLHandler

Parameters:

sql - The sql string for retrieving the items

Returns:

The items, not null

exists

public boolean exists(String sql)

Description copied from interface: SQLHandler

Returns true if the query returned a record.

Specified by:

exists in interface SQLHandler

Parameters:

sql - The sql string for checking the existence

Returns:

True if a record was returned

getDataSource

public DataSource getDataSource()

Specified by:

getDataSource in interface SQLHandler

Returns:

The DataSource

isDoExecuteUpdates

public boolean isDoExecuteUpdates()

Specified by:

isDoExecuteUpdates in interface SQLHandler

Returns:

Whether updates are executed on the database or not