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public interface LRSMapFieldStrategy
Interface implemented by map strategies so that they can support large result set maps.
Method Summary | |
---|---|
Object |
deriveKey(JDBCStore store,
Object value)
Some mapping derive keys from map values. |
Object |
deriveValue(JDBCStore store,
Object key)
Some mapping derive values from map keys. |
FieldMapping |
getFieldMapping()
The owning field mapping. |
ClassMapping[] |
getIndependentKeyMappings(boolean traverse)
Return all independent mappings to which this strategy must join in order to access map keys, or empty array if none. |
ClassMapping[] |
getIndependentValueMappings(boolean traverse)
Return all independent mappings to which this strategy must join in order to access map values, or empty array if none. |
ForeignKey |
getJoinForeignKey(ClassMapping cls)
Return the foreign key used to join to the owning field for the given mapping from either getIndependentKeyMappings(boolean) or
getIndependentValueMappings(boolean) (or null). |
Column[] |
getKeyColumns(ClassMapping cls)
Return the columns holding data for a map key for the given key mapping from getIndependentKeyMappings(boolean) or
getIndependentValueMappings(boolean) (or null). |
Result[] |
getResults(OpenJPAStateManager sm,
JDBCStore store,
JDBCFetchConfiguration fetch,
int eagerMode,
Joins[] joins,
boolean lrs)
Return results containing all keys and values for this map. |
Column[] |
getValueColumns(ClassMapping cls)
Return the columns holding data for a map value for the given value mapping from getIndependentKeyMappings(boolean) or
getIndependentValueMappings(boolean) (or null). |
Joins |
joinKeyRelation(Joins joins,
ClassMapping key)
Join this value's table to the table for the given key mapping from getIndependentKeyMappings(boolean) (or null). |
Joins |
joinValueRelation(Joins joins,
ClassMapping val)
Join this value's table to the table for the given value mapping from getIndependentValueMappings(boolean) (or null). |
Object |
loadKey(OpenJPAStateManager sm,
JDBCStore store,
JDBCFetchConfiguration fetch,
Result res,
Joins joins)
Load a key from the given result. |
Object |
loadValue(OpenJPAStateManager sm,
JDBCStore store,
JDBCFetchConfiguration fetch,
Result res,
Joins joins)
Load a value from the given result. |
void |
selectKey(Select sel,
ClassMapping key,
OpenJPAStateManager sm,
JDBCStore store,
JDBCFetchConfiguration fetch,
Joins joins)
Implement this method to select the keys of this field. |
void |
selectValue(Select sel,
ClassMapping val,
OpenJPAStateManager sm,
JDBCStore store,
JDBCFetchConfiguration fetch,
Joins joins)
Implement this method to select the values of this field. |
Methods inherited from interface org.apache.openjpa.jdbc.meta.FieldStrategy |
---|
appendIsEmpty, appendIsNotEmpty, appendIsNotNull, appendIsNull, appendSize, isEagerSelectToMany, isVersionable, join, joinKey, joinKeyRelation, joinRelation, load, load, loadEagerJoin, loadEagerParallel, loadKeyProjection, loadProjection, select, selectEagerJoin, selectEagerParallel, setFieldMapping, supportsSelect, toDataStoreValue, toKeyDataStoreValue, where |
Methods inherited from interface org.apache.openjpa.jdbc.meta.Strategy |
---|
customDelete, customInsert, customUpdate, delete, getAlias, initialize, insert, isCustomDelete, isCustomInsert, isCustomUpdate, map, update |
Method Detail |
---|
FieldMapping getFieldMapping()
ClassMapping[] getIndependentKeyMappings(boolean traverse)
ValueMapping.getIndependentTypeMappings()
,
ClassMapping.EMPTY_MAPPINGS
ClassMapping[] getIndependentValueMappings(boolean traverse)
ValueMapping.getIndependentTypeMappings()
,
ClassMapping.EMPTY_MAPPINGS
ForeignKey getJoinForeignKey(ClassMapping cls)
getIndependentKeyMappings(boolean)
or
getIndependentValueMappings(boolean)
(or null).
Column[] getKeyColumns(ClassMapping cls)
getIndependentKeyMappings(boolean)
or
getIndependentValueMappings(boolean)
(or null).
Column[] getValueColumns(ClassMapping cls)
getIndependentKeyMappings(boolean)
or
getIndependentValueMappings(boolean)
(or null).
void selectKey(Select sel, ClassMapping key, OpenJPAStateManager sm, JDBCStore store, JDBCFetchConfiguration fetch, Joins joins)
loadKey(org.apache.openjpa.kernel.OpenJPAStateManager, org.apache.openjpa.jdbc.kernel.JDBCStore, org.apache.openjpa.jdbc.kernel.JDBCFetchConfiguration, org.apache.openjpa.jdbc.sql.Result, org.apache.openjpa.jdbc.sql.Joins)
.
This method is only used if the key is not derived from the value.
Object loadKey(OpenJPAStateManager sm, JDBCStore store, JDBCFetchConfiguration fetch, Result res, Joins joins) throws SQLException
SQLException
Object deriveKey(JDBCStore store, Object value)
Object deriveValue(JDBCStore store, Object key)
void selectValue(Select sel, ClassMapping val, OpenJPAStateManager sm, JDBCStore store, JDBCFetchConfiguration fetch, Joins joins)
loadValue(org.apache.openjpa.kernel.OpenJPAStateManager, org.apache.openjpa.jdbc.kernel.JDBCStore, org.apache.openjpa.jdbc.kernel.JDBCFetchConfiguration, org.apache.openjpa.jdbc.sql.Result, org.apache.openjpa.jdbc.sql.Joins)
.
Object loadValue(OpenJPAStateManager sm, JDBCStore store, JDBCFetchConfiguration fetch, Result res, Joins joins) throws SQLException
SQLException
Result[] getResults(OpenJPAStateManager sm, JDBCStore store, JDBCFetchConfiguration fetch, int eagerMode, Joins[] joins, boolean lrs) throws SQLException
loadKey(org.apache.openjpa.kernel.OpenJPAStateManager, org.apache.openjpa.jdbc.kernel.JDBCStore, org.apache.openjpa.jdbc.kernel.JDBCFetchConfiguration, org.apache.openjpa.jdbc.sql.Result, org.apache.openjpa.jdbc.sql.Joins)
or
deriveKey(org.apache.openjpa.jdbc.kernel.JDBCStore, java.lang.Object)
and loadValue(org.apache.openjpa.kernel.OpenJPAStateManager, org.apache.openjpa.jdbc.kernel.JDBCStore, org.apache.openjpa.jdbc.kernel.JDBCFetchConfiguration, org.apache.openjpa.jdbc.sql.Result, org.apache.openjpa.jdbc.sql.Joins)
methods.
SQLException
Joins joinKeyRelation(Joins joins, ClassMapping key)
getIndependentKeyMappings(boolean)
(or null).
Joins joinValueRelation(Joins joins, ClassMapping val)
getIndependentValueMappings(boolean)
(or null).
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