org.apache.ojb.broker.platforms
Class PlatformOracleImpl

java.lang.Object
  org.apache.ojb.broker.platforms.PlatformDefaultImpl
      org.apache.ojb.broker.platforms.PlatformOracleImpl

All Implemented Interfaces:

JoinSyntaxTypes, Platform

Direct Known Subclasses:

PlatformOracle9iImpl

public class PlatformOracleImpl

extends PlatformDefaultImpl

This class is a concrete implementation of Platform. Provides an implementation that works around some issues with Oracle in general and Oracle's Thin driver in particular..

Version:

$Id: PlatformOracleImpl.java,v 1.17 2004/02/15 14:08:33 brj Exp $

Author:

Thomas Mahler

Field Summary

protected static int	THIN_BLOB_MAX_SIZE
protected static int	THIN_CLOB_MAX_SIZE
protected static java.lang.String	THIN_URL_PREFIX

Fields inherited from class org.apache.ojb.broker.platforms.PlatformDefaultImpl

log, m_batchUpdatesChecked, m_supportsBatchUpdates

Fields inherited from interface org.apache.ojb.broker.accesslayer.JoinSyntaxTypes

ORACLE_JOIN_SYNTAX, SQL92_JOIN_SYNTAX, SQL92_NOPAREN_JOIN_SYNTAX, SYBASE_JOIN_SYNTAX

Constructor Summary

PlatformOracleImpl()

Method Summary

void	afterStatementCreate(java.sql.Statement stmt) In Oracle we set escape processing explizit 'true' after a statement was created.
protected void	changePreparedStatementResultSetType(java.sql.PreparedStatement ps) Attempts to modify a private member in the Oracle thin driver's resultset to allow proper setting of large binary streams.
java.lang.String	createSequenceQuery(java.lang.String sequenceName) Override this method to enable database based sequence generation
java.lang.String	dropSequenceQuery(java.lang.String sequenceName) Override this method to enable database based sequence generation
byte	getJoinSyntaxType() Get join syntax type for this RDBMS - one on of the constants from JoinSyntaxType interface
protected static boolean	isUsingOracleThinDriver(java.sql.Connection conn) Checks if the supplied connection is using the Oracle thin driver.
java.lang.String	nextSequenceQuery(java.lang.String sequenceName) Override this method to enable database based sequence generation
void	setObjectForStatement(java.sql.PreparedStatement ps, int index, java.lang.Object value, int sqlType) For objects beyond 4k, weird things happen in Oracle if you try to use "setBytes", so for all cases it's better to use setBinaryStream.

Methods inherited from class org.apache.ojb.broker.platforms.PlatformDefaultImpl

addBatch, addPagingSql, afterStatementClose, beforeBatch, beforeStatementClose, bindPagingParameters, bindPagingParametersFirst, changeAutoCommitState, checkForBatchSupport, concatenate, executeBatch, getConcatenationCharacter, getEscapeClause, getLastInsertIdentityQuery, initializeJdbcConnection, prepareNextValProcedureStatement, setNullForStatement, supportsBatchOperations, supportsPaging, useCountForResultsetSize

Methods inherited from class java.lang.Object

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

Field Detail

THIN_URL_PREFIX

protected static final java.lang.String THIN_URL_PREFIX

See Also:

Constant Field Values

THIN_BLOB_MAX_SIZE

protected static final int THIN_BLOB_MAX_SIZE

See Also:

Constant Field Values

THIN_CLOB_MAX_SIZE

protected static final int THIN_CLOB_MAX_SIZE

See Also:

Constant Field Values

Constructor Detail

PlatformOracleImpl

public PlatformOracleImpl()

Method Detail

afterStatementCreate

public void afterStatementCreate(java.sql.Statement stmt)
                          throws PlatformException

In Oracle we set escape processing explizit 'true' after a statement was created.

Specified by:

afterStatementCreate in interface Platform

Overrides:

afterStatementCreate in class PlatformDefaultImpl

Throws:

PlatformException

setObjectForStatement

public void setObjectForStatement(java.sql.PreparedStatement ps,
                                  int index,
                                  java.lang.Object value,
                                  int sqlType)
                           throws java.sql.SQLException

For objects beyond 4k, weird things happen in Oracle if you try to use "setBytes", so for all cases it's better to use setBinaryStream. Oracle also requires a change in the resultset type of the prepared statement. MBAIRD NOTE: BLOBS may not work with Oracle database/thin driver versions prior to 8.1.6.

Specified by:

setObjectForStatement in interface Platform

Overrides:

setObjectForStatement in class PlatformDefaultImpl

Throws:

java.sql.SQLException

See Also:

Platform.setObjectForStatement(java.sql.PreparedStatement, int, java.lang.Object, int)

changePreparedStatementResultSetType

protected void changePreparedStatementResultSetType(java.sql.PreparedStatement ps)

Attempts to modify a private member in the Oracle thin driver's resultset to allow proper setting of large binary streams.

getJoinSyntaxType

public byte getJoinSyntaxType()

Get join syntax type for this RDBMS - one on of the constants from JoinSyntaxType interface

Specified by:

getJoinSyntaxType in interface Platform

Overrides:

getJoinSyntaxType in class PlatformDefaultImpl

See Also:

Platform.getJoinSyntaxType()

createSequenceQuery

public java.lang.String createSequenceQuery(java.lang.String sequenceName)

Description copied from class: PlatformDefaultImpl

Override this method to enable database based sequence generation

Specified by:

createSequenceQuery in interface Platform

Overrides:

createSequenceQuery in class PlatformDefaultImpl

nextSequenceQuery

public java.lang.String nextSequenceQuery(java.lang.String sequenceName)

Description copied from class: PlatformDefaultImpl

Override this method to enable database based sequence generation

Specified by:

nextSequenceQuery in interface Platform

Overrides:

nextSequenceQuery in class PlatformDefaultImpl

dropSequenceQuery

public java.lang.String dropSequenceQuery(java.lang.String sequenceName)

Description copied from class: PlatformDefaultImpl

Override this method to enable database based sequence generation

Specified by:

dropSequenceQuery in interface Platform

Overrides:

dropSequenceQuery in class PlatformDefaultImpl

isUsingOracleThinDriver

protected static boolean isUsingOracleThinDriver(java.sql.Connection conn)

Checks if the supplied connection is using the Oracle thin driver.

Parameters:

conn - database connection for which to check JDBC-driver

Returns:

true if the connection is using Oracle thin driver, false otherwise.