org.apache.openjpa.jdbc.meta.strats
Class LobFieldStrategy

java.lang.Object
  extended by org.apache.openjpa.jdbc.meta.strats.AbstractStrategy
      extended by org.apache.openjpa.jdbc.meta.strats.AbstractFieldStrategy
          extended by org.apache.openjpa.jdbc.meta.strats.LobFieldStrategy
All Implemented Interfaces:
Serializable, FieldStrategy, Strategy

public class LobFieldStrategy
extends AbstractFieldStrategy

Direct mapping from a stream value to a column.

Since:
1.1.0
Author:
Ignacio Andreu
See Also:
Serialized Form

Field Summary
 
Fields inherited from class org.apache.openjpa.jdbc.meta.strats.AbstractFieldStrategy
field
 
Constructor Summary
LobFieldStrategy()
           
 
Method Summary
protected  void assertNotMappedBy()
          Throws an informative exception if the field declares a mapped-by value.
 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.
 void insert(OpenJPAStateManager sm, JDBCStore store, RowManager rm)
          Set values for the mapping into the proper rows.
 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, JDBCFetchConfiguration fetch, Result res)
          Load virtual row data; the given result is not guaranteed to contain data for this field, so the field mapping should make sure the result contains its needed column data before loading.
 void map(boolean adapt)
          Map the owning mapping using this strategy.
 int select(Select sel, OpenJPAStateManager sm, JDBCStore store, JDBCFetchConfiguration fetch, int eagerMode)
          Select the virtual row columns of this mapping.
 void setFieldMapping(FieldMapping owner)
          Set the class mapping using this strategy.
 int supportsSelect(Select sel, int type, OpenJPAStateManager sm, JDBCStore store, JDBCFetchConfiguration fetch)
          Return whether this mapping can perform the given select type.
 void update(OpenJPAStateManager sm, JDBCStore store, RowManager rm)
          Set values for the mapping into the proper rows.
 
Methods inherited from class org.apache.openjpa.jdbc.meta.strats.AbstractFieldStrategy
appendIsEmpty, appendIsNotEmpty, appendIsNotNull, appendIsNull, appendSize, isEagerSelectToMany, isVersionable, join, joinKey, joinKeyRelation, joinRelation, load, loadEagerJoin, loadEagerParallel, loadKeyProjection, loadProjection, selectEagerJoin, selectEagerParallel, toDataStoreValue, toKeyDataStoreValue, where
 
Methods inherited from class org.apache.openjpa.jdbc.meta.strats.AbstractStrategy
customDelete, getAlias, initialize, isCustomDelete
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 
Methods inherited from interface org.apache.openjpa.jdbc.meta.Strategy
customDelete, getAlias, initialize, isCustomDelete
 

Constructor Detail

LobFieldStrategy

public LobFieldStrategy()
Method Detail

map

public void map(boolean adapt)
Description copied from interface: Strategy
Map the owning mapping using this strategy.

Specified by:
map in interface Strategy
Overrides:
map in class AbstractStrategy
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

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
Overrides:
isCustomInsert in class AbstractStrategy

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
Overrides:
delete in class AbstractStrategy
Throws:
SQLException
See Also:
Strategy.insert(org.apache.openjpa.kernel.OpenJPAStateManager, org.apache.openjpa.jdbc.kernel.JDBCStore, org.apache.openjpa.jdbc.sql.RowManager)

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
Overrides:
insert in class AbstractStrategy
Throws:
SQLException

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
Overrides:
customInsert in class AbstractStrategy
Throws:
SQLException

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
Overrides:
isCustomUpdate in class AbstractStrategy

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
Overrides:
update in class AbstractStrategy
Throws:
SQLException
See Also:
Strategy.insert(org.apache.openjpa.kernel.OpenJPAStateManager, org.apache.openjpa.jdbc.kernel.JDBCStore, org.apache.openjpa.jdbc.sql.RowManager)

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
Overrides:
customUpdate in class AbstractStrategy
Throws:
SQLException

supportsSelect

public int supportsSelect(Select sel,
                          int type,
                          OpenJPAStateManager sm,
                          JDBCStore store,
                          JDBCFetchConfiguration fetch)
Description copied from interface: FieldStrategy
Return whether this mapping can perform the given select type. Return 0 if the given type is not supported. If the given type is an eager parallel type, return the number of UNIONed selects necessary to fetch the data. Otherwise, return any positive number if the type is supported. The given state manager may be null if selecting multiple instances.

Specified by:
supportsSelect in interface FieldStrategy
Overrides:
supportsSelect in class AbstractFieldStrategy
See Also:
Select

select

public int select(Select sel,
                  OpenJPAStateManager sm,
                  JDBCStore store,
                  JDBCFetchConfiguration fetch,
                  int eagerMode)
Description copied from interface: FieldStrategy
Select the virtual row columns of this mapping.

Specified by:
select in interface FieldStrategy
Overrides:
select in class AbstractFieldStrategy
Parameters:
sel - the select to add to
sm - the instance being loaded, or null if not initialized yet or selecting for multiple instances
store - the current store manager
fetch - fetch configuration
eagerMode - the eager fetch mode to use; this may be more restrictive than the mode of the fetch configuration
Returns:
> 0 if this mapping requires the selected data (if any), 0 if it selected data but does not require it, or < 0 if no data was selected

load

public void load(OpenJPAStateManager sm,
                 JDBCStore store,
                 JDBCFetchConfiguration fetch,
                 Result res)
          throws SQLException
Description copied from interface: FieldStrategy
Load virtual row data; the given result is not guaranteed to contain data for this field, so the field mapping should make sure the result contains its needed column data before loading.

Specified by:
load in interface FieldStrategy
Overrides:
load in class AbstractFieldStrategy
Throws:
SQLException

assertNotMappedBy

protected void assertNotMappedBy()
Description copied from class: AbstractFieldStrategy
Throws an informative exception if the field declares a mapped-by value.

Overrides:
assertNotMappedBy in class AbstractFieldStrategy

setFieldMapping

public void setFieldMapping(FieldMapping owner)
Description copied from interface: FieldStrategy
Set the class mapping using this strategy. This will be called before use.

Specified by:
setFieldMapping in interface FieldStrategy
Overrides:
setFieldMapping in class AbstractFieldStrategy


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