to.etc.dbutil

Class BaseDB

java.lang.Object

to.etc.dbutil.BaseDB

Direct Known Subclasses:

MysqlDB, OracleDB, PostgresDB, UnknownDB

public abstract class BaseDB
extends Object

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	BaseDB(String name)

Method Summary

Modifier and Type	Method and Description
protected abstract String	getCheckString() Returns a SQL statement that is the cheapest way to check the validity of a connection.
protected abstract int	getFullSequenceID(Connection dbc, String tablename) Returns a sequence number that can be used to create a new PK for a record in the given table.
protected abstract Reader	getLobReader(Connection dbc, ResultSet rs, int col) Returns a Reader from the blob (clob) column specified.
protected abstract Reader	getLobReader(Connection dbc, ResultSet rs, String col) Returns a Reader from the blob (clob) column specified.
protected abstract InputStream	getLobStream(Connection dbc, ResultSet rs, int col) Returns an InputStream from the blob (clob) column specified.
protected abstract InputStream	getLobStream(Connection dbc, ResultSet rs, String col) Returns an InputStream from the blob (clob) column specified.
String	getName()
protected abstract int	getSequenceID(Connection dbc, String tablename) Returns a sequence number that can be used to create a new PK for a record in the given table.
boolean	oracleOuterJoin()
protected abstract void	setBlob(Connection dbc, String table, String column, String[] pkfields, Object[] key, InputStream is, int len)
protected void	setBlob(Connection dbc, String table, String column, String where, byte[][] data)
protected abstract void	setBlob(Connection dbc, String table, String column, String where, InputStream is, int len) Writes a blob to the requested record.
protected abstract void	setClob(Connection dbc, String table, String column, String where, Reader r)
static int	streamCopy(OutputStream os, InputStream is)

Methods inherited from class java.lang.Object

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

Constructor Detail

BaseDB

protected BaseDB(String name)

Method Detail

getName

public String getName()

getSequenceID

protected abstract int getSequenceID(Connection dbc,
                                     String tablename)
                              throws SQLException

Returns a sequence number that can be used to create a new PK for a record in the given table. Sequences are emulated on databases that do not support 'm.

Parameters:

dbc -

tablename -

Returns:

Throws:

SQLException

getFullSequenceID

protected abstract int getFullSequenceID(Connection dbc,
                                         String tablename)
                                  throws SQLException

Returns a sequence number that can be used to create a new PK for a record in the given table. Sequences are emulated on databases that do not support 'm.

Parameters:

dbc -

tablename -

Returns:

Throws:

SQLException

setBlob

protected abstract void setBlob(Connection dbc,
                                String table,
                                String column,
                                String where,
                                InputStream is,
                                int len)
                         throws SQLException

Writes a blob to the requested record.

Throws:

SQLException

setBlob

protected abstract void setBlob(Connection dbc,
                                String table,
                                String column,
                                String[] pkfields,
                                Object[] key,
                                InputStream is,
                                int len)
                         throws SQLException

Throws:

SQLException

getCheckString

protected abstract String getCheckString()

Returns a SQL statement that is the cheapest way to check the validity of a connection.

Returns:

streamCopy

public static int streamCopy(OutputStream os,
                             InputStream is)
                      throws IOException

Throws:

IOException

getLobReader

protected abstract Reader getLobReader(Connection dbc,
                                       ResultSet rs,
                                       int col)
                                throws Exception

Returns a Reader from the blob (clob) column specified.

Parameters:

rs -

col -

Returns:

Throws:

Exception

getLobReader

protected abstract Reader getLobReader(Connection dbc,
                                       ResultSet rs,
                                       String col)
                                throws Exception

Returns a Reader from the blob (clob) column specified.

Parameters:

rs -

col -

Returns:

Throws:

Exception

getLobStream

protected abstract InputStream getLobStream(Connection dbc,
                                            ResultSet rs,
                                            int col)
                                     throws Exception

Returns an InputStream from the blob (clob) column specified.

Parameters:

rs -

col -

Returns:

Throws:

Exception

getLobStream

protected abstract InputStream getLobStream(Connection dbc,
                                            ResultSet rs,
                                            String col)
                                     throws Exception

Returns an InputStream from the blob (clob) column specified.

Parameters:

rs -

col -

Returns:

Throws:

Exception

oracleOuterJoin

public boolean oracleOuterJoin()

setBlob

protected void setBlob(Connection dbc,
                       String table,
                       String column,
                       String where,
                       byte[][] data)
                throws SQLException

Throws:

SQLException

setClob

protected abstract void setClob(Connection dbc,
                                String table,
                                String column,
                                String where,
                                Reader r)
                         throws Exception

Throws:

Exception