org.datanucleus.store.rdbms.table

Class TableUtils

java.lang.Object

org.datanucleus.store.rdbms.table.TableUtils

public class TableUtils
extends Object

Class containing a series of convenience methods for the generation of tables and constraints.

Constructor Summary

Constructors

Constructor and Description
TableUtils()

Method Summary

Modifier and Type	Method and Description
static CandidateKey	getCandidateKeyForField(Table table, org.datanucleus.metadata.UniqueMetaData umd, JavaTypeMapping fieldMapping) Convenience method to return the candidate key (if any) for a field.
static ForeignKey	getForeignKeyForPCField(JavaTypeMapping fieldMapping, org.datanucleus.metadata.AbstractMemberMetaData mmd, boolean autoMode, RDBMSStoreManager storeMgr, org.datanucleus.ClassLoaderResolver clr) Convenience method to add a foreign key for a PC field.
static Collection	getForeignKeysForReferenceField(JavaTypeMapping fieldMapping, org.datanucleus.metadata.AbstractMemberMetaData mmd, boolean autoMode, RDBMSStoreManager storeMgr, org.datanucleus.ClassLoaderResolver clr) Convenience method to add foreign-keys for the specified reference field.
static Index	getIndexForField(Table table, org.datanucleus.metadata.IndexMetaData imd, JavaTypeMapping fieldMapping) Convenience method to create an Index for a field.

Methods inherited from class java.lang.Object

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

Constructor Detail

TableUtils

public TableUtils()

Method Detail

getForeignKeysForReferenceField

public static Collection getForeignKeysForReferenceField(JavaTypeMapping fieldMapping,
                                                         org.datanucleus.metadata.AbstractMemberMetaData mmd,
                                                         boolean autoMode,
                                                         RDBMSStoreManager storeMgr,
                                                         org.datanucleus.ClassLoaderResolver clr)

Convenience method to add foreign-keys for the specified reference field. Adds FKs from the column(s) in this table to the ID column(s) of the PC table of the implementation type.

Parameters:

fieldMapping - The field mapping (in this table)

mmd - MetaData for this field

autoMode - Whether we are in auto-create mode

storeMgr - Store Manager

clr - ClassLoader resolver

Returns:

The foreign key(s) created

getForeignKeyForPCField

public static ForeignKey getForeignKeyForPCField(JavaTypeMapping fieldMapping,
                                                 org.datanucleus.metadata.AbstractMemberMetaData mmd,
                                                 boolean autoMode,
                                                 RDBMSStoreManager storeMgr,
                                                 org.datanucleus.ClassLoaderResolver clr)

Convenience method to add a foreign key for a PC field. Adds a FK from the PC column(s) in this table to the ID columns in the PC's table.

Parameters:

fieldMapping - Mapping for the PC field

mmd - MetaData for the field

autoMode - Whether we are in auto-create mode

storeMgr - Store Manager

clr - ClassLoader resolver

Returns:

The ForeignKey (if any)

getIndexForField

public static Index getIndexForField(Table table,
                                     org.datanucleus.metadata.IndexMetaData imd,
                                     JavaTypeMapping fieldMapping)

Convenience method to create an Index for a field.

Parameters:

table - Container for the index

imd - The Index MetaData

fieldMapping - Mapping for the field

Returns:

The Index

getCandidateKeyForField

public static CandidateKey getCandidateKeyForField(Table table,
                                                   org.datanucleus.metadata.UniqueMetaData umd,
                                                   JavaTypeMapping fieldMapping)

Convenience method to return the candidate key (if any) for a field.

Parameters:

table - The table

umd - The Unique MetaData

fieldMapping - Mapping for the field

Returns:

The Candidate Key