org.exolab.castor.jdo.engine
Class BaseFactory

java.lang.Object
  org.exolab.castor.jdo.engine.BaseFactory

All Implemented Interfaces:

PersistenceFactory

Direct Known Subclasses:

GenericFactory

public abstract class BaseFactory

extends java.lang.Object

implements PersistenceFactory

PersistenceFactory for generic JDBC driver.

Version:

$Revision: 7123 $ $Date: 2006-04-10 16:39:24 -0600 (Mon, 10 Apr 2006) $

Author:

Assaf Arkin, Bruce Snyder

Constructor Summary

BaseFactory()

Method Summary

java.lang.Class	adjustSqlType(java.lang.Class sqlType) Some databases has some problems with some SQL types.
PersistenceQuery	getCallQuery(java.lang.String call, java.lang.Class[] paramTypes, java.lang.Class javaClass, java.lang.String[] fields, int[] sqlTypes) Needed to process OQL queries of "CALL" type (using stored procedure call).
Persistence	getPersistence(org.exolab.castor.mapping.ClassDescriptor clsDesc) Returns a persistence implementation for the specified object type (given its descriptor) on behalf of the specified cache engine. Return null if no persistence support is available for the specified object type.
boolean	supportsSetNullInWhere() Many databases don't support setNull for "WHERE fld=?"

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.exolab.castor.persist.spi.PersistenceFactory

getFactoryName, getQueryExpression, isDuplicateKeyException, quoteName

Constructor Detail

BaseFactory

public BaseFactory()

Method Detail

getPersistence

public Persistence getPersistence(org.exolab.castor.mapping.ClassDescriptor clsDesc)

Returns a persistence implementation for the specified object type (given its descriptor) on behalf of the specified cache engine. Return null if no persistence support is available for the specified object type.

Specified by:

getPersistence in interface PersistenceFactory

Parameters:

clsDesc - The class descriptor (may be null)

Returns:

A suiteable persistence implementation, or null

getCallQuery

public PersistenceQuery getCallQuery(java.lang.String call,
                                     java.lang.Class[] paramTypes,
                                     java.lang.Class javaClass,
                                     java.lang.String[] fields,
                                     int[] sqlTypes)

Needed to process OQL queries of "CALL" type (using stored procedure call). This feature is specific for JDO.

Parameters:

call - Stored procedure call (without "{call")

paramTypes - The types of the query parameters

javaClass - The Java class of the query results

fields - The field names

sqlTypes - The field SQL types

Returns:

null if this feature is not supported.

adjustSqlType

public java.lang.Class adjustSqlType(java.lang.Class sqlType)

Some databases has some problems with some SQL types. Usually it is enough to merely replace one SQL type by another.

Parameters:

sqlType - The correspondent Java class for the SQL type in mapping.xml

Returns:

The correspondent Java class for the SQL type that should be used instead.

supportsSetNullInWhere

public boolean supportsSetNullInWhere()

Many databases don't support setNull for "WHERE fld=?" and require "WHERE fld IS NULL".