org.springframework.jdbc.support.incrementer
Class AbstractSequenceMaxValueIncrementer

java.lang.Object
  org.springframework.jdbc.support.incrementer.AbstractDataFieldMaxValueIncrementer
      org.springframework.jdbc.support.incrementer.AbstractSequenceMaxValueIncrementer

All Implemented Interfaces:

InitializingBean, DataFieldMaxValueIncrementer

Direct Known Subclasses:

DB2MainframeSequenceMaxValueIncrementer, DB2SequenceMaxValueIncrementer, H2SequenceMaxValueIncrementer, HsqlSequenceMaxValueIncrementer, OracleSequenceMaxValueIncrementer, PostgreSQLSequenceMaxValueIncrementer

public abstract class AbstractSequenceMaxValueIncrementer
extends AbstractDataFieldMaxValueIncrementer

Abstract base class for DataFieldMaxValueIncrementer implementations that use a database sequence. Subclasses need to provide the database-specific SQL to use.

Since:

26.02.2004

Author:

Juergen Hoeller

See Also:

getSequenceQuery()

Field Summary

Fields inherited from class org.springframework.jdbc.support.incrementer.AbstractDataFieldMaxValueIncrementer

paddingLength

Constructor Summary

AbstractSequenceMaxValueIncrementer()
Default constructor for bean property style usage.

AbstractSequenceMaxValueIncrementer(DataSource dataSource, String incrementerName)
Convenience constructor.

Method Summary

protected long	getNextKey() Executes the SQL as specified by getSequenceQuery().
protected abstract String	getSequenceQuery() Return the database-specific query to use for retrieving a sequence value.

Methods inherited from class org.springframework.jdbc.support.incrementer.AbstractDataFieldMaxValueIncrementer

afterPropertiesSet, getDataSource, getIncrementerName, getPaddingLength, nextIntValue, nextLongValue, nextStringValue, setDataSource, setIncrementerName, setPaddingLength

Methods inherited from class java.lang.Object

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

Constructor Detail

AbstractSequenceMaxValueIncrementer

public AbstractSequenceMaxValueIncrementer()

Default constructor for bean property style usage.

See Also:

AbstractDataFieldMaxValueIncrementer.setDataSource(javax.sql.DataSource), AbstractDataFieldMaxValueIncrementer.setIncrementerName(java.lang.String)

AbstractSequenceMaxValueIncrementer

public AbstractSequenceMaxValueIncrementer(DataSource dataSource,
                                           String incrementerName)

Convenience constructor.

Parameters:

dataSource - the DataSource to use

incrementerName - the name of the sequence/table to use

Method Detail

getNextKey

protected long getNextKey()
                   throws DataAccessException

Executes the SQL as specified by getSequenceQuery().

Specified by:

getNextKey in class AbstractDataFieldMaxValueIncrementer

Returns:

the key to use as a long. It will eventually be converted later in another format by the public concrete methods of this class.

Throws:

DataAccessException

getSequenceQuery

protected abstract String getSequenceQuery()

Return the database-specific query to use for retrieving a sequence value.

The provided SQL is supposed to result in a single row with a single column that allows for extracting a long value.