public abstract class AbstractValueHandler extends Object implements ValueHandler
ValueHandler
interface methods.Constructor and Description |
---|
AbstractValueHandler() |
Modifier and Type | Method and Description |
---|---|
Object |
getResultArgument(ValueMapping vm)
Return the argument to pass to the result set when loading data
via
Result.getObject(java.lang.Object, int, java.lang.Object) , or null if none. |
boolean |
isVersionable(ValueMapping vm)
Return whether the values managed by this handler can be used in
state image versioning.
|
boolean |
objectValueRequiresLoad(ValueMapping vm)
Return whether this handler potentially must load extra data to extract
the object value from its datastore representation.
|
Object |
toDataStoreValue(ValueMapping vm,
Object val,
JDBCStore store)
Translate the given value to its datastore equivalent.
|
Object |
toObjectValue(ValueMapping vm,
Object val)
Translate the given datastore value into its Java equivalent.
|
Object |
toObjectValue(ValueMapping vm,
Object val,
OpenJPAStateManager sm,
JDBCStore store,
JDBCFetchConfiguration fetch)
Translate the given datastore value into its Java equivalent.
|
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
map
public boolean isVersionable(ValueMapping vm)
ValueHandler
isVersionable
in interface ValueHandler
public boolean objectValueRequiresLoad(ValueMapping vm)
ValueHandler
objectValueRequiresLoad
in interface ValueHandler
public Object getResultArgument(ValueMapping vm)
ValueHandler
Result.getObject(java.lang.Object, int, java.lang.Object)
, or null if none. If this value
occupies multiple columns, return an array with one element per
column. You may return null if all array elements would be null.getResultArgument
in interface ValueHandler
public Object toDataStoreValue(ValueMapping vm, Object val, JDBCStore store)
ValueHandler
toDataStoreValue
in interface ValueHandler
public Object toObjectValue(ValueMapping vm, Object val)
ValueHandler
ValueHandler.objectValueRequiresLoad(org.apache.openjpa.jdbc.meta.ValueMapping)
returns false.toObjectValue
in interface ValueHandler
public Object toObjectValue(ValueMapping vm, Object val, OpenJPAStateManager sm, JDBCStore store, JDBCFetchConfiguration fetch) throws SQLException
ValueHandler
ValueHandler.objectValueRequiresLoad(org.apache.openjpa.jdbc.meta.ValueMapping)
returns true.toObjectValue
in interface ValueHandler
sm
- the state manager that owns the value; may be null if
loading a projectionSQLException
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