org.datanucleus.store.rdbms.mapping
Class BlobRDBMSMapping

java.lang.Object
  org.datanucleus.store.mapped.mapping.AbstractDatastoreMapping
      org.datanucleus.store.rdbms.mapping.RDBMSMapping
          org.datanucleus.store.rdbms.mapping.AbstractLargeBinaryRDBMSMapping
              org.datanucleus.store.rdbms.mapping.BlobRDBMSMapping

All Implemented Interfaces:

org.datanucleus.store.mapped.mapping.DatastoreMapping

public class BlobRDBMSMapping
extends AbstractLargeBinaryRDBMSMapping

Mapping of a BLOB RDBMS type. A BLOB column can be treated in two ways in terms of storage and retrieval.

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

Field Summary

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

column, LOCALISER_RDBMS, storeMgr

Fields inherited from class org.datanucleus.store.mapped.mapping.AbstractDatastoreMapping

LOCALISER, mapping

Constructor Summary

	BlobRDBMSMapping(org.datanucleus.store.mapped.mapping.JavaTypeMapping mapping, org.datanucleus.store.mapped.MappedStoreManager storeMgr, org.datanucleus.store.mapped.DatastoreField field) Constructor.
protected	BlobRDBMSMapping(org.datanucleus.store.mapped.MappedStoreManager storeMgr, org.datanucleus.store.mapped.mapping.JavaTypeMapping mapping) Constructor.

Method Summary

Object	getObject(Object rs, int param) Method to retrieve the object from the large binary column.
String	getString(Object rs, int param) Accessor for String value when serialised.
SQLTypeInfo	getTypeInfo() Accessor for the RDBMS BLOB type being represented.
void	setObject(Object ps, int param, Object value) Method to store a field into a "large varbinary" column.
void	setString(Object ps, int param, String value) Cater for serialisation of Strings.

Methods inherited from class org.datanucleus.store.rdbms.mapping.AbstractLargeBinaryRDBMSMapping

getObjectForBytes, initialize

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

equals, failureMessage, failureMessage, getDatabaseAdapter, getDatastoreField, getInsertionInputParameter, getUpdateInputParameter, hashCode, includeInFetchStatement, initTypeInfo, insertValuesOnInsert, isNullable

Methods inherited from class org.datanucleus.store.mapped.mapping.AbstractDatastoreMapping

failureMessage, getBoolean, getByte, getChar, getDouble, getFloat, getInt, getJavaTypeMapping, getLong, getShort, isBitBased, isBooleanBased, isDecimalBased, isIntegerBased, isStringBased, setBoolean, setByte, setChar, setDouble, setFloat, setInt, setLong, setShort

Methods inherited from class java.lang.Object

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

Constructor Detail

BlobRDBMSMapping

protected BlobRDBMSMapping(org.datanucleus.store.mapped.MappedStoreManager storeMgr,
                           org.datanucleus.store.mapped.mapping.JavaTypeMapping mapping)

Constructor.

Parameters:

storeMgr - Store Manager

mapping - Java type mapping

BlobRDBMSMapping

public BlobRDBMSMapping(org.datanucleus.store.mapped.mapping.JavaTypeMapping mapping,
                        org.datanucleus.store.mapped.MappedStoreManager storeMgr,
                        org.datanucleus.store.mapped.DatastoreField field)

Constructor.

Parameters:

mapping - Java type mapping

storeMgr - Store Manager

field - Field to be mapped

Method Detail

getTypeInfo

public SQLTypeInfo getTypeInfo()

Accessor for the RDBMS BLOB type being represented.

Specified by:

getTypeInfo in class RDBMSMapping

Returns:

TypeInfo for the BLOB type.

getObject

public Object getObject(Object rs,
                        int param)

Description copied from class: AbstractLargeBinaryRDBMSMapping

Method to retrieve the object from the large binary column.

Specified by:

getObject in interface org.datanucleus.store.mapped.mapping.DatastoreMapping

Overrides:

getObject in class AbstractLargeBinaryRDBMSMapping

Parameters:

rs - The ResultSet

param - The parameter position

Returns:

The object

setObject

public void setObject(Object ps,
                      int param,
                      Object value)

Description copied from class: AbstractLargeBinaryRDBMSMapping

Method to store a field into a "large varbinary" column.

Specified by:

setObject in interface org.datanucleus.store.mapped.mapping.DatastoreMapping

Overrides:

setObject in class AbstractLargeBinaryRDBMSMapping

Parameters:

ps - The PreparedStatement

param - Parameter position in the statement

value - The value to store

setString

public void setString(Object ps,
                      int param,
                      String value)

Description copied from class: AbstractLargeBinaryRDBMSMapping

Cater for serialisation of Strings.

Specified by:

setString in interface org.datanucleus.store.mapped.mapping.DatastoreMapping

Overrides:

setString in class AbstractLargeBinaryRDBMSMapping

Parameters:

ps - PreparedStatement

param - param indexes

value - The value of the String

getString

public String getString(Object rs,
                        int param)

Description copied from class: AbstractLargeBinaryRDBMSMapping

Accessor for String value when serialised.

Specified by:

getString in interface org.datanucleus.store.mapped.mapping.DatastoreMapping

Overrides:

getString in class AbstractLargeBinaryRDBMSMapping

Parameters:

rs - ResultSet

param - param indexes

Returns:

The String value