org.springframework.jdbc.support

Class AbstractFallbackSQLExceptionTranslator

java.lang.Object

org.springframework.jdbc.support.AbstractFallbackSQLExceptionTranslator

All Implemented Interfaces:

SQLExceptionTranslator

Direct Known Subclasses:

SQLErrorCodeSQLExceptionTranslator, SQLExceptionSubclassTranslator, SQLStateSQLExceptionTranslator

public abstract class AbstractFallbackSQLExceptionTranslator
extends Object
implements SQLExceptionTranslator

Base class for SQLExceptionTranslator implementations that allow for fallback to some other SQLExceptionTranslator.

Since:

2.5.6

Author:

Juergen Hoeller

Field Summary

Fields

Modifier and Type	Field and Description
protected Log	logger Logger available to subclasses.

Constructor Summary

Constructors

Constructor and Description
AbstractFallbackSQLExceptionTranslator()

Method Summary

Modifier and Type	Method and Description
protected String	buildMessage(String task, String sql, SQLException ex) Build a message String for the given SQLException.
protected abstract DataAccessException	doTranslate(String task, String sql, SQLException ex) Template method for actually translating the given exception.
SQLExceptionTranslator	getFallbackTranslator() Return the fallback exception translator, if any.
void	setFallbackTranslator(SQLExceptionTranslator fallback) Override the default SQL state fallback translator (typically a SQLStateSQLExceptionTranslator).
DataAccessException	translate(String task, String sql, SQLException ex) Pre-checks the arguments, calls doTranslate(java.lang.String, java.lang.String, java.sql.SQLException), and invokes the fallback translator if necessary.

Methods inherited from class java.lang.Object

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

Field Detail

logger

protected final Log logger

Logger available to subclasses.

Constructor Detail

AbstractFallbackSQLExceptionTranslator

public AbstractFallbackSQLExceptionTranslator()

Method Detail

setFallbackTranslator

public void setFallbackTranslator(@Nullable
                                  SQLExceptionTranslator fallback)

Override the default SQL state fallback translator (typically a SQLStateSQLExceptionTranslator).

getFallbackTranslator

@Nullable
public SQLExceptionTranslator getFallbackTranslator()

Return the fallback exception translator, if any.

translate

@NonNull
public DataAccessException translate(String task,
                                              @Nullable
                                              String sql,
                                              SQLException ex)

Pre-checks the arguments, calls doTranslate(java.lang.String, java.lang.String, java.sql.SQLException), and invokes the fallback translator if necessary.

Specified by:

translate in interface SQLExceptionTranslator

Parameters:

task - readable text describing the task being attempted

sql - the SQL query or update that caused the problem (if known)

ex - the offending SQLException

Returns:

the DataAccessException wrapping the SQLException, or null if no translation could be applied (in a custom translator; the default translators always throw an UncategorizedSQLException in such a case)

See Also:

NestedRuntimeException.getRootCause()

doTranslate

@Nullable
protected abstract DataAccessException doTranslate(String task,
                                                             @Nullable
                                                             String sql,
                                                             SQLException ex)

Template method for actually translating the given exception.

The passed-in arguments will have been pre-checked. Furthermore, this method is allowed to return null to indicate that no exception match has been found and that fallback translation should kick in.

Parameters:

task - readable text describing the task being attempted

sql - the SQL query or update that caused the problem (if known)

ex - the offending SQLException

Returns:

the DataAccessException, wrapping the SQLException; or null if no exception match found

buildMessage

protected String buildMessage(String task,
                              @Nullable
                              String sql,
                              SQLException ex)

Build a message String for the given SQLException.

To be called by translator subclasses when creating an instance of a generic DataAccessException class.

Parameters:

task - readable text describing the task being attempted

sql - the SQL statement that caused the problem

ex - the offending SQLException

Returns:

the message String to use