org.jpox.store.rdbms.mapping
Class AbstractLargeBinaryRDBMSMapping

java.lang.Object
  org.jpox.store.rdbms.mapping.RDBMSMapping
      org.jpox.store.rdbms.mapping.ColumnMapping
          org.jpox.store.rdbms.mapping.AbstractLargeBinaryRDBMSMapping

All Implemented Interfaces:

DatastoreMapping

Direct Known Subclasses:

BlobRDBMSMapping, LongVarBinaryRDBMSMapping, VarBinaryRDBMSMapping

public abstract class AbstractLargeBinaryRDBMSMapping
extends ColumnMapping

Mapping of a large binary (e.g BLOB, LONGVARBINARY) RDBMS type. A large binary column can be treated in two ways in terms of storage and retrieval.

• Serialise the field into the large binary using ObjectOutputStream, and deserialise it back using ObjectInputStream
• Store the field using a byte[] stream, and retrieve it in the same way.

Version:

$Revision: 1.3 $

Field Summary

Fields inherited from class org.jpox.store.rdbms.mapping.ColumnMapping

column

Fields inherited from class org.jpox.store.rdbms.mapping.RDBMSMapping

LOCALISER, LOCALISER_STORE, mapping, storeMgr

Constructor Summary

	AbstractLargeBinaryRDBMSMapping(JavaTypeMapping mapping, StoreManager storeMgr, DatastoreField field) Constructor.
protected	AbstractLargeBinaryRDBMSMapping(StoreManager storeMgr, JavaTypeMapping mapping) Constructor.

Method Summary

java.lang.Object	getObject(java.lang.Object rs, int param) Method to retrieve the object from the large binary column.
abstract TypeInfo	getTypeInfo() Accessor for the RDBMS BLOB type being represented.
protected void	initialize() Initialisation method, initialising the type info.
void	setObject(java.lang.Object ps, int param, java.lang.Object value) Method to store a field into a BLOB column.

Methods inherited from class org.jpox.store.rdbms.mapping.ColumnMapping

equals, getColumn, getDatastoreField, getInsertionInputParameter, getUpdateInputParameter, hashCode, includeInFetchStatement, initTypeInfo, isNullable

Methods inherited from class org.jpox.store.rdbms.mapping.RDBMSMapping

failureMessage, getBoolean, getByte, getChar, getDatabaseAdapter, getDouble, getFloat, getInt, getJavaTypeMapping, getLong, getShort, getString, setBoolean, setByte, setChar, setDouble, setFloat, setInt, setLong, setShort, setString

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

AbstractLargeBinaryRDBMSMapping

protected AbstractLargeBinaryRDBMSMapping(StoreManager storeMgr,
                                          JavaTypeMapping mapping)

Constructor.

Parameters:

storeMgr - Store Manager

mapping - Java type mapping

AbstractLargeBinaryRDBMSMapping

public AbstractLargeBinaryRDBMSMapping(JavaTypeMapping mapping,
                                       StoreManager storeMgr,
                                       DatastoreField field)

Constructor.

Parameters:

mapping - Java type mapping

storeMgr - Store Manager

field - Field to be mapped

Method Detail

initialize

protected void initialize()

Initialisation method, initialising the type info.

getTypeInfo

public abstract TypeInfo getTypeInfo()

Accessor for the RDBMS BLOB type being represented.

Specified by:

getTypeInfo in class ColumnMapping

Returns:

TypeInfo for the BLOB type.

setObject

public void setObject(java.lang.Object ps,
                      int param,
                      java.lang.Object value)

Method to store a field into a BLOB column.

Specified by:

setObject in interface DatastoreMapping

Overrides:

setObject in class RDBMSMapping

Parameters:

ps - The PreparedStatement

param - Parameter position in the statement

value - The value to store

getObject

public java.lang.Object getObject(java.lang.Object rs,
                                  int param)

Method to retrieve the object from the large binary column.

Specified by:

getObject in interface DatastoreMapping

Overrides:

getObject in class RDBMSMapping

Parameters:

rs - The ResultSet

param - The parameter position

Returns:

The object