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public interface PersistenceFactory
Factory for producing new persistence implementations. Used for
constructing a persistence service provider (see Persistence
)
as well as for constructing new query expressions (see QueryExpression
).
The factory is specified in the JDO configuration file for the database and is configured through Bean-like accessor methods.
Persistence
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). |
java.lang.String |
getFactoryName()
Returns the name of this factory. |
Persistence |
getPersistence(ClassDescriptor clsDesc)
Returns a persistence implementation for the specified object type (given its descriptor) on behalf of the specified cache engine. |
QueryExpression |
getQueryExpression()
Returns a new empty query expression suitable for the underlying SQL engine. |
java.lang.Boolean |
isDuplicateKeyException(java.lang.Exception except)
Determines it the given exception is indication of a duplicate key. |
java.lang.String |
quoteName(java.lang.String name)
Returns the quoted identifier suitable for preventing conflicts between database identifiers and reserved keywords. |
boolean |
supportsSetNullInWhere()
Many databases don't support setNull for "WHERE fld=?" and require "WHERE fld IS NULL". |
Method Detail |
---|
java.lang.String getFactoryName()
Persistence getPersistence(ClassDescriptor clsDesc) throws MappingException
clsDesc
- The class descriptor
(may be null)
MappingException
- Indicates that the object type is not
supported by the persistence engine due to improper mappingQueryExpression getQueryExpression()
java.lang.Boolean isDuplicateKeyException(java.lang.Exception except)
java.lang.String quoteName(java.lang.String name)
name
- The identifier (table, column, etc)
java.lang.Class adjustSqlType(java.lang.Class sqlType)
sqlType
- The correspondent Java class for the SQL type in mapping.xml
boolean supportsSetNullInWhere()
PersistenceQuery getCallQuery(java.lang.String call, java.lang.Class[] paramTypes, java.lang.Class javaClass, java.lang.String[] fields, int[] sqlTypes)
call
- Stored procedure call (without "{call")paramTypes
- The types of the query parametersjavaClass
- The Java class of the query resultsfields
- The field namessqlTypes
- The field SQL types
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