kodo.jdbc.meta
Class ColumnVersionIndicator

java.lang.Object
  |
  +--kodo.jdbc.meta.Indicator
        |
        +--kodo.jdbc.meta.VersionIndicator
              |
              +--kodo.jdbc.meta.ColumnVersionIndicator

All Implemented Interfaces:

Mapping

Direct Known Subclasses:

DateVersionIndicator, NumberVersionIndicator

public abstract class ColumnVersionIndicator

extends VersionIndicator

Abstract base class for version indicators that use a column to hold version information.

Constructor Summary

ColumnVersionIndicator()

Method Summary

Object	attachVersion(Serializable version) Convert from an external form of the version into the internal form.
protected void	change(KodoStateManager sm, RowManager rm, int action) Issue either an update or delete.
int	compareVersion(Object v1, Object v2) We expect version objects that subclasses use will implement Comparable; simply use that mechanism for performing comparison.
void	delete(KodoStateManager sm, RowManager rm) Set the where values appropriately to delete the proper instance, and set all relations on non-secondary tables as updates.
Serializable	detachVersion(Object version) Return a serializable, external form of the version.
void	fromMappingInfo(MappingInfo info, boolean adapt) Deserialize this mapping from a simple MappingInfo instance parsed from XML or some other format.
Column	getColumn() Return the column used to hold version info.
protected abstract int	getDataStoreTypeCode() Return the FieldMapping type code for the type of the column.
protected int	getJDBCType() Return the JDBC type of the column for this indicator.
protected abstract Object	getNextVersion(Object currentVersion) Return the next version object, given the current one (which may be null for newly-persisted objects).
void	insert(KodoStateManager sm, RowManager rm) Set values for the mapping into the proper rows.
void	load(KodoStateManager sm, JDBCStoreManager store, Result res) Load virtual row data.
boolean	map() Map a new instance of this mapping type.
protected abstract boolean	needsRefresh(Object mem, Object db) Return true if mem is not up-to-date with db.
void	refSchemaComponents() Increment the reference count of all used schema components.
boolean	select(Select sel) Select the virtual row columns of this mapping.
void	setColumn(Column col) Set the column used to hold version info.
boolean	synchVersion(KodoStateManager sm, JDBCStoreManager store) Synchronize the version of the given state manager with the version stored in memory.
void	toMappingInfo(MappingInfo info) Serialize this mapping to a simple MappingInfo instance for transfer to XML or some other format.
void	update(KodoStateManager sm, RowManager rm) Set values for the mapping into the proper rows.

Methods inherited from class kodo.jdbc.meta.VersionIndicator

getDefaults, newInstance, postLoad, toString

Methods inherited from class kodo.jdbc.meta.Indicator

delete, getDBDictionary, getMappingRepository, getOwnerMapping, getTable, insert, isCustomDelete, isCustomInsert, isCustomUpdate, reverseMap, setOwnerMapping, update

Methods inherited from class java.lang.Object

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

Methods inherited from interface kodo.jdbc.meta.Mapping

getMappingType

Constructor Detail

ColumnVersionIndicator

public ColumnVersionIndicator()

Method Detail

getDataStoreTypeCode

protected abstract int getDataStoreTypeCode()

Return the FieldMapping type code for the type of the column.

getJDBCType

protected int getJDBCType()

Return the JDBC type of the column for this indicator. Defaults to the preferred type for getDataStoreTypeCode().

getNextVersion

protected abstract Object getNextVersion(Object currentVersion)

Return the next version object, given the current one (which may be null for newly-persisted objects).

needsRefresh

protected abstract boolean needsRefresh(Object mem,
                                        Object db)

Return true if mem is not up-to-date with db.

compareVersion

public int compareVersion(Object v1,
                          Object v2)

We expect version objects that subclasses use will implement Comparable; simply use that mechanism for performing comparison.

Overrides:

compareVersion in class VersionIndicator

Following copied from class: kodo.jdbc.meta.VersionIndicator

See Also:

StoreManager.compareVersion(kodo.runtime.KodoStateManager, java.lang.Object, java.lang.Object)

getColumn

public Column getColumn()

Return the column used to hold version info.

setColumn

public void setColumn(Column col)

Set the column used to hold version info.

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

public void fromMappingInfo(MappingInfo info,
                            boolean adapt)

Description copied from interface: Mapping

Deserialize this mapping from a simple MappingInfo instance parsed from XML or some other format. If the info is incompatible and adapt is true, try to adapt to the new info. This method must validate the given mapping information using the SchemaGroup.findTable(kodo.jdbc.schema.Table) method to find any needed tables, the Table.getColumn(java.lang.String) method to retrieve columns from those tables, and the Column.isCompatible(int, int) method to check all column types. This validation is important, as some schema groups use these methods to build themselves up dynamically rather than reading schema information from the database.

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

Throws:

MappingInfoNotFoundException - if the given info is invalid

map

public boolean map()

Description copied from interface: Mapping

Map a new instance of this mapping type. If the underlying metadata cannot be mapped using this type, return false.

refSchemaComponents

public void refSchemaComponents()

Description copied from interface: Mapping

Increment the reference count of all used schema components.

Overrides:

refSchemaComponents in class Indicator

synchVersion

public boolean synchVersion(KodoStateManager sm,
                            JDBCStoreManager store)
                     throws SQLException

Description copied from class: VersionIndicator

Synchronize the version of the given state manager with the version stored in memory.

Overrides:

synchVersion in class VersionIndicator

Following copied from class: kodo.jdbc.meta.VersionIndicator

See Also:

StoreManager.synchVersion(kodo.runtime.KodoStateManager, java.lang.Object)

select

public boolean select(Select sel)

Description copied from class: Indicator

Select the virtual row columns of this mapping. Returns false by default.

Overrides:

select in class Indicator

Following copied from class: kodo.jdbc.meta.Indicator

Returns:

true if anything was selected; false otherwise

load

public void load(KodoStateManager sm,
                 JDBCStoreManager store,
                 Result res)
          throws SQLException

Description copied from class: VersionIndicator

Load virtual row data.

Overrides:

load in class VersionIndicator

insert

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

Description copied from interface: Mapping

Set values for the mapping into the proper rows. For class mappings, this method will be called only after the corresponding method has been called for all fields of this mapping.

Overrides:

insert in class Indicator

update

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

Description copied from interface: Mapping

Set values for the mapping into the proper rows.

Overrides:

update in class Indicator

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

See Also:

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

delete

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

Description copied from interface: Mapping

Set the where values appropriately to delete the proper instance, and set all relations on non-secondary tables as updates. This allows foreign key analysis.

Overrides:

delete in class Indicator

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

See Also:

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

change

protected void change(KodoStateManager sm,
                      RowManager rm,
                      int action)
               throws SQLException

Issue either an update or delete.

detachVersion

public Serializable detachVersion(Object version)

Description copied from class: VersionIndicator

Return a serializable, external form of the version.

Overrides:

detachVersion in class VersionIndicator

attachVersion

public Object attachVersion(Serializable version)

Description copied from class: VersionIndicator

Convert from an external form of the version into the internal form.

Overrides:

attachVersion in class VersionIndicator