org.datanucleus.store.rdbms.mapping
Class AbstractLargeBinaryRDBMSMapping

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

All Implemented Interfaces:

org.datanucleus.store.mapped.mapping.DatastoreMapping

Direct Known Subclasses:

BlobRDBMSMapping, LongVarBinaryRDBMSMapping, VarBinaryRDBMSMapping

public abstract class AbstractLargeBinaryRDBMSMapping
extends RDBMSMapping

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 - i.e Java serialisation
• 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

	AbstractLargeBinaryRDBMSMapping(org.datanucleus.store.mapped.mapping.JavaTypeMapping mapping, org.datanucleus.store.mapped.MappedStoreManager storeMgr, org.datanucleus.store.mapped.DatastoreField field) Constructor.
protected	AbstractLargeBinaryRDBMSMapping(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.
protected Object	getObjectForBytes(byte[] bytes, int param)
String	getString(Object resultSet, int exprIndex) Accessor for String value when serialised.
protected void	initialize() Initialisation method, initialising the type info.
void	setObject(Object ps, int param, Object value) Method to store a field into a "large varbinary" column.
void	setString(Object preparedStatement, int exprIndex, String value) Cater for serialisation of Strings.

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

equals, failureMessage, failureMessage, getDatabaseAdapter, getDatastoreField, getInsertionInputParameter, getTypeInfo, 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

AbstractLargeBinaryRDBMSMapping

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

Constructor.

Parameters:

storeMgr - Store Manager

mapping - Java type mapping

AbstractLargeBinaryRDBMSMapping

public AbstractLargeBinaryRDBMSMapping(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

initialize

protected void initialize()

Initialisation method, initialising the type info.

setObject

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

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 org.datanucleus.store.mapped.mapping.AbstractDatastoreMapping

Parameters:

ps - The PreparedStatement

param - Parameter position in the statement

value - The value to store

getObjectForBytes

protected Object getObjectForBytes(byte[] bytes,
                                   int param)

getObject

public Object getObject(Object rs,
                        int param)

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 org.datanucleus.store.mapped.mapping.AbstractDatastoreMapping

Parameters:

rs - The ResultSet

param - The parameter position

Returns:

The object

setString

public void setString(Object preparedStatement,
                      int exprIndex,
                      String value)

Cater for serialisation of Strings.

Specified by:

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

Overrides:

setString in class org.datanucleus.store.mapped.mapping.AbstractDatastoreMapping

Parameters:

preparedStatement - PreparedStatement

exprIndex - param indexes

value - The value of the String

getString

public String getString(Object resultSet,
                        int exprIndex)

Accessor for String value when serialised.

Specified by:

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

Overrides:

getString in class org.datanucleus.store.mapped.mapping.AbstractDatastoreMapping

Parameters:

resultSet - ResultSet

exprIndex - param indexes

Returns:

The String value