org.datanucleus.metadata

Class MetaDataMerger

java.lang.Object

org.datanucleus.metadata.MetaDataMerger

public class MetaDataMerger
extends Object

Convenience class to handle the merging of MetaData. This is used in the following situations

• JDO : Merging ORM MetaData into JDO MetaData
• JPA : Merging Annotations information into JPA MetaData
• JDO : Merging Annotations information into JDO MetaData

Constructor Summary

Constructors

Constructor and Description
MetaDataMerger()

Method Summary

Modifier and Type	Method and Description
static void	mergeClassAnnotationsData(AbstractClassMetaData primaryCmd, AbstractClassMetaData annotCmd, MetaDataManager mmgr) Method to take a class MetaData definition and merge in any Annotations "MetaData" definition.
static void	mergeClassORMData(AbstractClassMetaData primaryCmd, AbstractClassMetaData ormCmd, MetaDataManager mmgr) Method to take a class JDO MetaData definition and merge in the ORM MetaData definition.
static void	mergeFileORMData(FileMetaData primaryFmd, FileMetaData ormFmd) Method to take a file JDO MetaData definition and merge in the ORM MetaData definition.

Methods inherited from class java.lang.Object

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

Constructor Detail

MetaDataMerger

public MetaDataMerger()

Method Detail

mergeFileORMData

public static void mergeFileORMData(FileMetaData primaryFmd,
                                    FileMetaData ormFmd)

Method to take a file JDO MetaData definition and merge in the ORM MetaData definition. If something is specified in the JDO MetaData and also in the ORM MetaData then the ORM MetaData takes precedence.

Parameters:

primaryFmd - The JDO Field definition (to be updated)

ormFmd - The ORM Field definition (to be merged into the JDO Field definition)

Throws:

NucleusException - if an error occurs while merging the ORM info

mergeClassORMData

public static void mergeClassORMData(AbstractClassMetaData primaryCmd,
                                     AbstractClassMetaData ormCmd,
                                     MetaDataManager mmgr)

Method to take a class JDO MetaData definition and merge in the ORM MetaData definition. If something is specified in the JDO MetaData and also in the ORM MetaData then the ORM MetaData takes precedence. This is tied pretty intrinsically to the AbstractClassMetaData class and so could have been included there.

Parameters:

primaryCmd - The JDO Class definition (to be updated)

ormCmd - The ORM Class definition (to be merged into the JDO Class definition)

mmgr - MetaData manager

Throws:

NucleusException - if an error occurs while merging the ORM info

mergeClassAnnotationsData

public static void mergeClassAnnotationsData(AbstractClassMetaData primaryCmd,
                                             AbstractClassMetaData annotCmd,
                                             MetaDataManager mmgr)

Method to take a class MetaData definition and merge in any Annotations "MetaData" definition. If something is specified in the MetaData and also in the annotations then the MetaData takes precedence. This is tied pretty intrinsically to the AbstractClassMetaData class and so could have been included there.

Parameters:

primaryCmd - The MetaData definition (to be updated)

annotCmd - The annotations Class definition (to be merged into the MetaData definition)

mmgr - MetaData manager

Throws:

NucleusException - if an error occurs while merging the annotations info