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AbstractDataFieldMaxValueIncrementer (Spring Framework API 2.1) - Spring Framework 2.1.0 API 文档英文版

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org.springframework.jdbc.support.incrementer
Class AbstractDataFieldMaxValueIncrementer

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

All Implemented Interfaces:

InitializingBean, DataFieldMaxValueIncrementer

Direct Known Subclasses:

AbstractSequenceMaxValueIncrementer, HsqlMaxValueIncrementer, MySQLMaxValueIncrementer

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public abstract class AbstractDataFieldMaxValueIncrementer
extends Object
implements DataFieldMaxValueIncrementer, InitializingBean

Implementation of DataFieldMaxValueIncrementer that delegates to a single getNextKey template method that returns a long. Uses longs for String values, padding with zeroes if required.

Author:

Dmitriy Kopylenko, Juergen Hoeller, Jean-Pierre Pawlak, Juergen Hoeller

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Field Summary
protected  int	paddingLength           The length to which a string result should be pre-pended with zeroes

 

Constructor Summary
AbstractDataFieldMaxValueIncrementer()

 

Method Summary
void	afterPropertiesSet()           Invoked by a BeanFactory after it has set all bean properties supplied (and satisfied BeanFactoryAware and ApplicationContextAware).
DataSource	getDataSource()           Return the data source to retrieve the value from.
String	getIncrementerName()           Return the name of the sequence/table.
protected abstract  long	getNextKey()           Determine the next key to use, as a long.
int	getPaddingLength()           Return the padding length for String values.
int	nextIntValue()           Increment the data store field's max value as int.
long	nextLongValue()           Increment the data store field's max value as long.
String	nextStringValue()           Increment the data store field's max value as String.
void	setDataSource(DataSource dataSource)           Set the data source to retrieve the value from.
void	setIncrementerName(String incrementerName)           Set the name of the sequence/table.
void	setPaddingLength(int paddingLength)           Set the padding length, i.e. the length to which a string result should be pre-pended with zeroes.

 

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

 

Field Detail

paddingLength

protected int paddingLength

The length to which a string result should be pre-pended with zeroes

Constructor Detail

AbstractDataFieldMaxValueIncrementer

public AbstractDataFieldMaxValueIncrementer()

Method Detail

setDataSource

public void setDataSource(DataSource dataSource)

Set the data source to retrieve the value from.

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getDataSource

public DataSource getDataSource()

Return the data source to retrieve the value from.

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setIncrementerName

public void setIncrementerName(String incrementerName)

Set the name of the sequence/table.

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getIncrementerName

public String getIncrementerName()

Return the name of the sequence/table.

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setPaddingLength

public void setPaddingLength(int paddingLength)

Set the padding length, i.e. the length to which a string result should be pre-pended with zeroes.

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getPaddingLength

public int getPaddingLength()

Return the padding length for String values.

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afterPropertiesSet

public void afterPropertiesSet()

Description copied from interface: InitializingBean

Invoked by a BeanFactory after it has set all bean properties supplied (and satisfied BeanFactoryAware and ApplicationContextAware).

This method allows the bean instance to perform initialization only possible when all bean properties have been set and to throw an exception in the event of misconfiguration.

Specified by:

afterPropertiesSet in interface InitializingBean

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nextIntValue

public int nextIntValue()
                 throws DataAccessException

Description copied from interface: DataFieldMaxValueIncrementer

Increment the data store field's max value as int.

Specified by:

nextIntValue in interface DataFieldMaxValueIncrementer

Returns:

int next data store value such as max + 1

Throws:

DataAccessException - in case of errors

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nextLongValue

public long nextLongValue()
                   throws DataAccessException

Description copied from interface: DataFieldMaxValueIncrementer

Increment the data store field's max value as long.

Specified by:

nextLongValue in interface DataFieldMaxValueIncrementer

Returns:

int next data store value such as max + 1

Throws:

DataAccessException - in case of errors

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nextStringValue

public String nextStringValue()
                       throws DataAccessException

Description copied from interface: DataFieldMaxValueIncrementer

Increment the data store field's max value as String.

Specified by:

nextStringValue in interface DataFieldMaxValueIncrementer

Returns:

next data store value such as max + 1

Throws:

DataAccessException - in case of errors

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getNextKey

protected abstract long getNextKey()

Determine the next key to use, as a long.

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.

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