kodo.jdbc.meta
Class ReferenceFieldMapping

java.lang.Object
  |
  +--kodo.meta.DelegatingExtensions
        |
        +--kodo.meta.DelegatingFieldMetaData
              |
              +--kodo.jdbc.meta.FieldMapping
                    |
                    +--kodo.jdbc.meta.ReferenceFieldMapping

All Implemented Interfaces:

Comparable, Extensions, FieldMetaData, JDBCTypes, JDOTypes, Mapping

Direct Known Subclasses:

ColumnFieldMapping, ContainerFieldMapping, EmbeddedOneToOneFieldMapping, OneToOneFieldMapping

public abstract class ReferenceFieldMapping

extends FieldMapping

Base class of most field mappings. Maps a value that might be in a table other than the owning class' table, and manages the reference foreign key linking to the parent table (if such a key exists).

Fields inherited from class kodo.jdbc.meta.FieldMapping

AUTO_INCREMENT, DELETE_ACTION, ELEMENT_DELETE_ACTION, ELEMENT_INDEXED, ELEMENT_SIZE, FIELD_MAP, INDEXED, KEY_DELETE_ACTION, KEY_INDEXED, KEY_SIZE, REF_DELETE_ACTION, REF_INDEXED, SIZE, VALUE_DELETE_ACTION, VALUE_INDEXED, VALUE_SIZE

Fields inherited from interface kodo.jdbc.meta.JDBCTypes

TYPE_ASCII_STREAM, TYPE_BINARY_STREAM, TYPE_BLOB, TYPE_BYTES, TYPE_CHAR_STREAM, TYPE_CLOB, TYPE_JDBC_DEFAULT, TYPE_REF, TYPE_SQL_ARRAY, TYPE_SQL_DATE, TYPE_SQL_OBJECT, TYPE_TIME, TYPE_TIMESTAMP

Fields inherited from interface kodo.meta.JDOTypes

TYPE_ARRAY, TYPE_BIGDECIMAL, TYPE_BIGINTEGER, TYPE_BOOLEAN, TYPE_BOOLEAN_OBJ, TYPE_BYTE, TYPE_BYTE_OBJ, TYPE_CHAR, TYPE_CHAR_OBJ, TYPE_COLLECTION, TYPE_DATE, TYPE_DOUBLE, TYPE_DOUBLE_OBJ, TYPE_FCO, TYPE_FLOAT, TYPE_FLOAT_OBJ, TYPE_INT, TYPE_INT_OBJ, TYPE_LOCALE, TYPE_LONG, TYPE_LONG_OBJ, TYPE_MAP, TYPE_NUMBER, TYPE_OBJECT, TYPE_PC_OBJECT, TYPE_SHORT, TYPE_SHORT_OBJ, TYPE_STRING

Fields inherited from interface kodo.meta.FieldMetaData

DEPENDENT, ELEMENT_DEPENDENT, ELEMENT_TYPE, EXTERNALIZER, FACTORY, FETCH_GROUP, INVERSE_OWNER, KEY_DEPENDENT, KEY_TYPE, LRS, MANAGE_NONE, MANAGE_PERSISTENT, MANAGE_TRANSACTIONAL, NULL_DEFAULT, NULL_EXCEPTION, NULL_NONE, TYPE, VALUE_DEPENDENT, VALUE_TYPE

Constructor Summary

ReferenceFieldMapping(FieldMetaData meta)
Constructor.

Method Summary

protected void	createRefForeignKey(Table table) Creates the reference foreign key on the given secondary table.
void	delete(KodoStateManager sm, RowManager rm) Delete the row for this object if the reference foreign key exists.
protected void	fromMappingInfo(MappingInfo info, boolean adapt, boolean fkRequired)
protected Row	getJoinedRow(RowManager rm, int action, KodoStateManager sm, boolean nullEmbedded) Return the row to use for this field.
ForeignKey	getRefForeignKey() Return the foreign key linking this mapping to the parent table.
int	getRefJoinType() Return the reference join type.
protected Joins	getSelectJoins(Select sel) Return any joins needed to get from the primary table to this table for a select.
Table	getTable() Return the mapping's primary data table.
protected void	join(Joins joins, boolean toMany) Joins from the owning class' table to the table where this field lies using the reference foreign key.
void	refSchemaComponents() Increment the reference count of all used schema components.
void	setRefForeignKey(ForeignKey fk) Set the foreign key linking this mapping to the parent table.
protected void	setRefForeignKey(KodoStateManager sm, Row row) Set the reference foreign key if it exists.
void	setRefJoinType(int joinType) Set the reference join type.
void	toMappingInfo(MappingInfo info) Serialize this mapping to a simple MappingInfo instance for transfer to XML or some other format.
protected void	wherePrimaryKey(Select sel, KodoStateManager sm) Add a wherePrimaryKey or whereForeignKey condition to the given select, depending on whether we have a reference foreign key.
protected void	whereRefForeignKey(KodoStateManager sm, Row row) Add a WHERE condition matching the reference foreign key to the given value on the given row.

Methods inherited from class kodo.jdbc.meta.FieldMapping

appendIsEmpty, appendIsNotNull, appendIsNull, containsSelectTables, delete, deleteEmbedded, deleteEmbedded, getColumns, getDataStoreValue, getDBDictionary, getDeclaredElementTypeMapping, getDeclaredElementTypeMetaData, getDeclaredKeyTypeMapping, getDeclaredKeyTypeMetaData, getDeclaredTypeMapping, getDeclaredTypeMetaData, getDefaults, getDeleteAction, getElementDeleteAction, getElementIndexed, getElementSize, getElementTypeMapping, getElementTypeMetaData, getFieldMappingName, getIndexed, getInverseOwnerMapping, getInverseOwnerMetaData, getKeyColumns, getKeyDataStoreValue, getKeyDeleteAction, getKeyIndexed, getKeySize, getKeyTypeMapping, getKeyTypeMetaData, getMappingRepository, getOwner, getOwnerMapping, getRefDeleteAction, getRefIndexed, getSize, getTypeMapping, getTypeMetaData, insert, invalidateResolve, isAutoIncrement, isCustomDelete, isCustomDeleteEmbedded, isCustomInsert, isCustomNullEmbedded, isCustomUpdate, isDeleteActionDeferred, isElementDeleteActionDeferred, isKeyDeleteActionDeferred, isRefDeleteActionDeferred, isResolved, join, joinKey, joinKeyRelation, joinRelation, load, load, loadKeyProjection, loadProjection, newInstance, nullEmbedded, nullEmbedded, resolve, reverseMap, select, selectEager, setAutoIncrement, setDeleteAction, setElementDeleteAction, setElementIndexed, setElementSize, setFieldMappingName, setIndexed, setKeyDeleteAction, setKeyIndexed, setKeySize, setOwner, setRefDeleteAction, setRefIndexed, setSize, supportsTwoPartSelect, update

Methods inherited from class kodo.meta.DelegatingFieldMetaData

compareTo, equals, getComparator, getDeclaredElementType, getDeclaredElementTypeCode, getDeclaredIndex, getDeclaredKeyType, getDeclaredKeyTypeCode, getDeclaredType, getDeclaredTypeCode, getDelegate, getElementType, getElementTypeCode, getElementTypeName, getExternalizer, getExternalizerMethod, getExternalValue, getFactory, getFactoryMethod, getFetchGroup, getFieldFlag, getFieldValue, getFullName, getIndex, getInnermostDelegate, getInverseOwner, getKeyType, getKeyTypeCode, getKeyTypeName, getManagement, getName, getNullValue, getPrimaryKeyIndex, getProxyType, getType, getTypeCode, getTypeName, hashCode, isDefaultFetchGroupExplicit, isDependent, isElementDependent, isElementEmbedded, isEmbedded, isExplicit, isInDefaultFetchGroup, isKeyDependent, isKeyEmbedded, isLRS, isPrimaryKey, isTransient, setComparator, setDeclaredElementType, setDeclaredElementTypeCode, setDeclaredIndex, setDeclaredKeyType, setDeclaredKeyTypeCode, setDeclaredType, setDeclaredTypeCode, setDependent, setElementDependent, setElementEmbedded, setElementTypeName, setEmbedded, setExplicit, setExternalizer, setFactory, setFetchGroup, setInDefaultFetchGroup, setIndex, setInverseOwner, setKeyDependent, setKeyEmbedded, setKeyTypeName, setLRS, setManagement, setName, setNullValue, setPrimaryKey, setPrimaryKeyIndex, setProxyType, setTransient, setTypeName, toString

Methods inherited from class kodo.meta.DelegatingExtensions

addExtension, addExtension, getBooleanExtension, getBooleanExtension, getDoubleExtension, getDoubleExtension, getEmbeddedExtensions, getEmbeddedExtensions, getExtensionKeys, getExtensionKeys, getExtensionVendors, getIntExtension, getIntExtension, getObjectExtension, getObjectExtension, getStringExtension, getStringExtension, hasExtension, hasExtension, isEmpty, removeEmbeddedExtensions, removeEmbeddedExtensions, removeExtension, removeExtension

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface kodo.jdbc.meta.Mapping

fromMappingInfo, getMappingType, insert, map, update

Methods inherited from interface kodo.meta.Extensions

addExtension, addExtension, getBooleanExtension, getBooleanExtension, getDoubleExtension, getDoubleExtension, getEmbeddedExtensions, getEmbeddedExtensions, getExtensionKeys, getExtensionKeys, getExtensionVendors, getIntExtension, getIntExtension, getObjectExtension, getObjectExtension, getStringExtension, getStringExtension, hasExtension, hasExtension, isEmpty, removeEmbeddedExtensions, removeEmbeddedExtensions, removeExtension, removeExtension

Constructor Detail

ReferenceFieldMapping

public ReferenceFieldMapping(FieldMetaData meta)

Constructor. Supply underlying metadata.

Method Detail

getRefForeignKey

public ForeignKey getRefForeignKey()

Return the foreign key linking this mapping to the parent table.

setRefForeignKey

public void setRefForeignKey(ForeignKey fk)

Set the foreign key linking this mapping to the parent table.

getRefJoinType

public int getRefJoinType()

Return the reference join type.

setRefJoinType

public void setRefJoinType(int joinType)

Set the reference join type.

getTable

public Table getTable()

Description copied from interface: Mapping

Return the mapping's primary data table.

toMappingInfo

public void toMappingInfo(MappingInfo info)

Description copied from interface: Mapping

Serialize this mapping to a simple MappingInfo instance for transfer to XML or some other format.

fromMappingInfo

protected void fromMappingInfo(MappingInfo info,
                               boolean adapt,
                               boolean fkRequired)

refSchemaComponents

public void refSchemaComponents()

Description copied from interface: Mapping

Increment the reference count of all used schema components.

createRefForeignKey

protected void createRefForeignKey(Table table)

Creates the reference foreign key on the given secondary table.

join

protected void join(Joins joins,
                    boolean toMany)

Joins from the owning class' table to the table where this field lies using the reference foreign key.

getSelectJoins

protected Joins getSelectJoins(Select sel)

Return any joins needed to get from the primary table to this table for a select.

wherePrimaryKey

protected void wherePrimaryKey(Select sel,
                               KodoStateManager sm)

Add a wherePrimaryKey or whereForeignKey condition to the given select, depending on whether we have a reference foreign key.

getJoinedRow

protected Row getJoinedRow(RowManager rm,
                           int action,
                           KodoStateManager sm,
                           boolean nullEmbedded)
                    throws SQLException

Return the row to use for this field. This method is meant only for single-value fields that might reside in a table that is joined to the primary table through the reference foreign key. It is not meant for multi-valued fields like collections and maps. The method checks whether the join type of the field is Join.TYPE_OUTER, and if so it deletes the field's previous value, then if the field is non-null returns an insert row for the new value. The reference foreign key will already be set on the returned row; subclass mappings just need to set their own values.

Parameters:

nullEmbedded - true if the row is being used to null an embedded value

setRefForeignKey

protected void setRefForeignKey(KodoStateManager sm,
                                Row row)
                         throws SQLException

Set the reference foreign key if it exists.

whereRefForeignKey

protected void whereRefForeignKey(KodoStateManager sm,
                                  Row row)
                           throws SQLException

Add a WHERE condition matching the reference foreign key to the given value on the given row.

delete

public void delete(KodoStateManager sm,
                   RowManager rm)
            throws SQLException

Delete the row for this object if the reference foreign key exists.

Following copied from interface: kodo.jdbc.meta.Mapping

See Also:

Mapping.insert(kodo.runtime.KodoStateManager, kodo.jdbc.sql.RowManager)