org.datanucleus.store.mapped
Class ColumnCreator

java.lang.Object
  org.datanucleus.store.mapped.ColumnCreator

public final class ColumnCreator
extends java.lang.Object

Helper class to create columns. Used for generating columns for join table fields.

Field Summary

protected static Localiser

LOCALISER Localiser for messages.

Method Summary

static JavaTypeMapping	createColumnsForField(java.lang.Class javaType, JavaTypeMapping mapping, DatastoreContainerObject table, MappedStoreManager storeMgr, AbstractMemberMetaData mmd, boolean isPrimaryKey, boolean isNullable, boolean serialised, boolean embedded, int fieldRole, ColumnMetaData[] columnMetaData, ClassLoaderResolver clr, boolean isReferenceField) Method to create the column(s) for a field in either a join table or for a reference field.
static JavaTypeMapping	createColumnsForJoinTables(java.lang.Class javaType, AbstractMemberMetaData mmd, ColumnMetaData[] columnMetaData, MappedStoreManager storeMgr, DatastoreContainerObject table, boolean primaryKey, boolean nullable, int fieldRole, ClassLoaderResolver clr) Method to create the mapping for a join table for collection element, array element, map key, map value.
static DatastoreField	createIndexColumn(JavaTypeMapping mapping, MappedStoreManager storeMgr, ClassLoaderResolver clr, DatastoreContainerObject table, ColumnMetaData colmd, boolean pk) Convenience method to add the column for an index mapping.

Methods inherited from class java.lang.Object

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

Field Detail

LOCALISER

protected static final Localiser LOCALISER

Localiser for messages.

Method Detail

createIndexColumn

public static DatastoreField createIndexColumn(JavaTypeMapping mapping,
                                               MappedStoreManager storeMgr,
                                               ClassLoaderResolver clr,
                                               DatastoreContainerObject table,
                                               ColumnMetaData colmd,
                                               boolean pk)

Convenience method to add the column for an index mapping.

Parameters:

mapping - The mapping

storeMgr - Manager for the store

clr - ClassLoaderResolver

table - Table where we create the column

colmd - The column MetaData

pk - Whether this column is (part of) the PK.

Returns:

The added column

createColumnsForJoinTables

public static JavaTypeMapping createColumnsForJoinTables(java.lang.Class javaType,
                                                         AbstractMemberMetaData mmd,
                                                         ColumnMetaData[] columnMetaData,
                                                         MappedStoreManager storeMgr,
                                                         DatastoreContainerObject table,
                                                         boolean primaryKey,
                                                         boolean nullable,
                                                         int fieldRole,
                                                         ClassLoaderResolver clr)

Method to create the mapping for a join table for collection element, array element, map key, map value. Supports non-embedded, non-serialised, and must be PC.

Parameters:

javaType - The java type of the field

mmd - Metadata for the field/property

columnMetaData - MetaData defining the columns

storeMgr - Store Manager

table - The table to add the mapping to

primaryKey - Whether this field is the PK

nullable - Whether this field is to be nullable

fieldRole - The role of the mapping within this field

clr - ClassLoader resolver

Returns:

The java type mapping for this field

createColumnsForField

public static JavaTypeMapping createColumnsForField(java.lang.Class javaType,
                                                    JavaTypeMapping mapping,
                                                    DatastoreContainerObject table,
                                                    MappedStoreManager storeMgr,
                                                    AbstractMemberMetaData mmd,
                                                    boolean isPrimaryKey,
                                                    boolean isNullable,
                                                    boolean serialised,
                                                    boolean embedded,
                                                    int fieldRole,
                                                    ColumnMetaData[] columnMetaData,
                                                    ClassLoaderResolver clr,
                                                    boolean isReferenceField)

Method to create the column(s) for a field in either a join table or for a reference field.

Parameters:

javaType - The java type of the field being stored

mapping - The JavaTypeMapping (if existing, otherwise created and returned by this method)

table - The table to insert the columns into (join table, or primary table (if ref field))

storeMgr - Manager for the store

mmd - MetaData for the field (or null if a collection field)

isPrimaryKey - Whether to create the columns as part of the PK

isNullable - Whether the columns should be nullable

serialised - Whether the field is serialised

embedded - Whether the field is embedded

fieldRole - The role of the field (when part of a join table)

columnMetaData - MetaData for the column(s)

clr - ClassLoader resolver

isReferenceField - Whether this field is part of a reference field

Returns:

The JavaTypeMapping for the table