org.apache.openjpa.jdbc.meta
Class Version

java.lang.Object
  org.apache.openjpa.jdbc.meta.Version

All Implemented Interfaces:

Strategy, VersionStrategy, MetaDataContext, MetaDataModes

public class Version
extends Object
implements VersionStrategy, MetaDataContext, MetaDataModes

Handles optimistic lock versioning for a class.

Author:

Abe White

Field Summary

Fields inherited from interface org.apache.openjpa.meta.MetaDataModes

MODE_MAPPING, MODE_MAPPING_INIT, MODE_META, MODE_NONE, MODE_QUERY

Constructor Summary

Version(ClassMapping mapping)
Constructor.

Method Summary

void	afterLoad(OpenJPAStateManager sm, JDBCStore store) This method is called after data is loaded into the instance, in case the version indicator works off of a state image.
boolean	checkVersion(OpenJPAStateManager sm, JDBCStore store, boolean updateVersion) Checks the version of the given state manager with the version stored in memory.
void	clearMapping() Clear mapping information, including strategy.
int	compareVersion(Object v1, Object v2)
void	customDelete(OpenJPAStateManager sm, JDBCStore store) Override this method to customize flushing this mapping.
void	customInsert(OpenJPAStateManager sm, JDBCStore store) Override this method to customize flushing this mapping.
void	customUpdate(OpenJPAStateManager sm, JDBCStore store) Override this method to customize flushing this mapping.
void	delete(OpenJPAStateManager sm, JDBCStore store, RowManager rm) Set the where values appropriately to delete the proper instance, and set all relations on non-secondary tables as updates.
String	getAlias() Return the alias of this strategy.
ClassMapping	getClassMapping() Return the owning mapping.
ColumnIO	getColumnIO() I/O information on the version columns.
Column[]	getColumns() Columns used for versioning.
Index	getIndex() Index on the version columns, or null if none.
VersionMappingInfo	getMappingInfo() Raw mapping data.
MappingRepository	getMappingRepository()
MetaDataRepository	getRepository() Access metadata repository.
int	getResolve() Resolve mode.
VersionStrategy	getStrategy() The strategy used for versioning.
void	initialize() Perform caching and other initialization operations.
void	insert(OpenJPAStateManager sm, JDBCStore store, RowManager rm) Set values for the mapping into the proper rows.
Boolean	isCustomDelete(OpenJPAStateManager sm, JDBCStore store) Return Boolean.FALSE if this mapping does not customize the delete process, Boolean.TRUE if it does, or null if it does customize the delete, but also relies on the standard delete method being called.
Boolean	isCustomInsert(OpenJPAStateManager sm, JDBCStore store) Return Boolean.FALSE if this mapping does not customize the insert process, Boolean.TRUE if it does, or null if it does customize the insert, but also relies on the standard insert method being called.
Boolean	isCustomUpdate(OpenJPAStateManager sm, JDBCStore store) Return Boolean.FALSE if this mapping does not customize the update process, Boolean.TRUE if it does, or null if it does customize the update, but also relies on the standard update method being called.
void	load(OpenJPAStateManager sm, JDBCStore store, Result res) Load data.
void	map(boolean adapt) Map the owning mapping using this strategy.
void	refSchemaComponents() Increment the reference count of used schema components.
boolean	resolve(int mode) Resolve mapping information.
boolean	select(Select sel, ClassMapping mapping) Select the data for this indicator.
void	setColumnIO(ColumnIO io) I/O information on the version columns.
void	setColumns(Column[] cols) Columns used for versioning.
void	setIndex(Index idx) Index on the version columns, or null if none.
void	setResolve(int mode) Resolve mode.
void	setResolve(int mode, boolean on) Resolve mode.
void	setStrategy(VersionStrategy strategy, Boolean adapt) The strategy used for versioning.
void	setVersion(Version owner) Set the version that uses this strategy.
void	syncMappingInfo() Update MappingInfo with our current mapping information.
String	toString()
void	update(OpenJPAStateManager sm, JDBCStore store, RowManager rm) Set values for the mapping into the proper rows.

Methods inherited from class java.lang.Object

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

Constructor Detail

Version

public Version(ClassMapping mapping)

Constructor. Supply owning mapping.

Method Detail

getRepository

public MetaDataRepository getRepository()

Description copied from interface: MetaDataContext

Access metadata repository.

Specified by:

getRepository in interface MetaDataContext

getMappingRepository

public MappingRepository getMappingRepository()

getClassMapping

public ClassMapping getClassMapping()

Return the owning mapping.

getStrategy

public VersionStrategy getStrategy()

The strategy used for versioning.

setStrategy

public void setStrategy(VersionStrategy strategy,
                        Boolean adapt)

The strategy used for versioning. The adapt parameter determines whether to adapt when mapping the strategy; use null if the strategy should not be mapped.

getMappingInfo

public VersionMappingInfo getMappingInfo()

Raw mapping data.

getColumns

public Column[] getColumns()

Columns used for versioning.

setColumns

public void setColumns(Column[] cols)

Columns used for versioning.

getColumnIO

public ColumnIO getColumnIO()

I/O information on the version columns.

setColumnIO

public void setColumnIO(ColumnIO io)

I/O information on the version columns.

getIndex

public Index getIndex()

Index on the version columns, or null if none.

setIndex

public void setIndex(Index idx)

Index on the version columns, or null if none.

refSchemaComponents

public void refSchemaComponents()

Increment the reference count of used schema components.

clearMapping

public void clearMapping()

Clear mapping information, including strategy.

syncMappingInfo

public void syncMappingInfo()

Update MappingInfo with our current mapping information.

getResolve

public int getResolve()

Resolve mode.

setResolve

public void setResolve(int mode)

Resolve mode.

setResolve

public void setResolve(int mode,
                       boolean on)

Resolve mode.

resolve

public boolean resolve(int mode)

Resolve mapping information.

getAlias

public String getAlias()

Description copied from interface: Strategy

Return the alias of this strategy. For custom strategies, return the full class name.

Specified by:

getAlias in interface Strategy

map

public void map(boolean adapt)

Description copied from interface: Strategy

Map the owning mapping using this strategy.

Specified by:

map in interface Strategy

Parameters:

adapt - if true, use the owning mapping's raw mapping info to set its ORM data; if false, ORM data will already be set

initialize

public void initialize()

Description copied from interface: Strategy

Perform caching and other initialization operations. This method is called after Strategy.map(boolean), and after all related components have been mapped as well.

Specified by:

initialize in interface Strategy

insert

public void insert(OpenJPAStateManager sm,
                   JDBCStore store,
                   RowManager rm)
            throws SQLException

Description copied from interface: Strategy

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.

Specified by:

insert in interface Strategy

Throws:

SQLException

update

public void update(OpenJPAStateManager sm,
                   JDBCStore store,
                   RowManager rm)
            throws SQLException

Description copied from interface: Strategy

Set values for the mapping into the proper rows.

Specified by:

update in interface Strategy

Throws:

SQLException

See Also:

Strategy.insert(org.apache.openjpa.kernel.OpenJPAStateManager, org.apache.openjpa.jdbc.kernel.JDBCStore, org.apache.openjpa.jdbc.sql.RowManager)

delete

public void delete(OpenJPAStateManager sm,
                   JDBCStore store,
                   RowManager rm)
            throws SQLException

Description copied from interface: Strategy

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.

Specified by:

delete in interface Strategy

Throws:

SQLException

See Also:

Strategy.insert(org.apache.openjpa.kernel.OpenJPAStateManager, org.apache.openjpa.jdbc.kernel.JDBCStore, org.apache.openjpa.jdbc.sql.RowManager)

isCustomInsert

public Boolean isCustomInsert(OpenJPAStateManager sm,
                              JDBCStore store)

Description copied from interface: Strategy

Return Boolean.FALSE if this mapping does not customize the insert process, Boolean.TRUE if it does, or null if it does customize the insert, but also relies on the standard insert method being called. Implement the Strategy.customInsert(org.apache.openjpa.kernel.OpenJPAStateManager, org.apache.openjpa.jdbc.kernel.JDBCStore) method to implement the custom insertion behavior.

Specified by:

isCustomInsert in interface Strategy

isCustomUpdate

public Boolean isCustomUpdate(OpenJPAStateManager sm,
                              JDBCStore store)

Description copied from interface: Strategy

Return Boolean.FALSE if this mapping does not customize the update process, Boolean.TRUE if it does, or null if it does customize the update, but also relies on the standard update method being called. Implement the Strategy.customUpdate(org.apache.openjpa.kernel.OpenJPAStateManager, org.apache.openjpa.jdbc.kernel.JDBCStore) method to override the default update behavior.

Specified by:

isCustomUpdate in interface Strategy

isCustomDelete

public Boolean isCustomDelete(OpenJPAStateManager sm,
                              JDBCStore store)

Description copied from interface: Strategy

Return Boolean.FALSE if this mapping does not customize the delete process, Boolean.TRUE if it does, or null if it does customize the delete, but also relies on the standard delete method being called. Implement the Strategy.customDelete(org.apache.openjpa.kernel.OpenJPAStateManager, org.apache.openjpa.jdbc.kernel.JDBCStore) method to override the default deletion behavior.

Specified by:

isCustomDelete in interface Strategy

customInsert

public void customInsert(OpenJPAStateManager sm,
                         JDBCStore store)
                  throws SQLException

Description copied from interface: Strategy

Override this method to customize flushing this mapping. For classes, this method must also flush all fields. For fields, this method is called after the owning object is inserted, so if this field is in a row with other fields, that row will already exist.

Specified by:

customInsert in interface Strategy

Throws:

SQLException

customUpdate

public void customUpdate(OpenJPAStateManager sm,
                         JDBCStore store)
                  throws SQLException

Description copied from interface: Strategy

Override this method to customize flushing this mapping. For classes, this method must also flush all fields.

Specified by:

customUpdate in interface Strategy

Throws:

SQLException

customDelete

public void customDelete(OpenJPAStateManager sm,
                         JDBCStore store)
                  throws SQLException

Description copied from interface: Strategy

Override this method to customize flushing this mapping. For classes, this method must also flush all fields. For fields, this method will be called after the owning object is deleted.

Specified by:

customDelete in interface Strategy

Throws:

SQLException

setVersion

public void setVersion(Version owner)

Description copied from interface: VersionStrategy

Set the version that uses this strategy. This will be called before use.

Specified by:

setVersion in interface VersionStrategy

select

public boolean select(Select sel,
                      ClassMapping mapping)

Description copied from interface: VersionStrategy

Select the data for this indicator.

Specified by:

select in interface VersionStrategy

mapping - the known base class being selected; this may not be the base class in the inheritance hierarchy

Returns:

true if anything was selected; false otherwise

load

public void load(OpenJPAStateManager sm,
                 JDBCStore store,
                 Result res)
          throws SQLException

Description copied from interface: VersionStrategy

Load data.

Specified by:

load in interface VersionStrategy

Throws:

SQLException

afterLoad

public void afterLoad(OpenJPAStateManager sm,
                      JDBCStore store)

Description copied from interface: VersionStrategy

This method is called after data is loaded into the instance, in case the version indicator works off of a state image.

Specified by:

afterLoad in interface VersionStrategy

checkVersion

public boolean checkVersion(OpenJPAStateManager sm,
                            JDBCStore store,
                            boolean updateVersion)
                     throws SQLException

Description copied from interface: VersionStrategy

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

Specified by:

checkVersion in interface VersionStrategy

Returns:

true if the in-memory version was up-to-date, false otherwise

Throws:

SQLException

compareVersion

public int compareVersion(Object v1,
                          Object v2)

Specified by:

compareVersion in interface VersionStrategy

See Also:

StoreManager.compareVersion(org.apache.openjpa.kernel.OpenJPAStateManager, java.lang.Object, java.lang.Object)

toString

public String toString()

Overrides:

toString in class Object