mirror of
git://gcc.gnu.org/git/gcc.git
synced 2024-12-25 06:48:59 +08:00
463 lines
15 KiB
Java
463 lines
15 KiB
Java
/* Connection.java -- Manage a database connection.
|
|
Copyright (C) 1999, 2000 Free Software Foundation, Inc.
|
|
|
|
This file is part of GNU Classpath.
|
|
|
|
GNU Classpath is free software; you can redistribute it and/or modify
|
|
it under the terms of the GNU General Public License as published by
|
|
the Free Software Foundation; either version 2, or (at your option)
|
|
any later version.
|
|
|
|
GNU Classpath is distributed in the hope that it will be useful, but
|
|
WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with GNU Classpath; see the file COPYING. If not, write to the
|
|
Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
|
|
02111-1307 USA.
|
|
|
|
Linking this library statically or dynamically with other modules is
|
|
making a combined work based on this library. Thus, the terms and
|
|
conditions of the GNU General Public License cover the whole
|
|
combination.
|
|
|
|
As a special exception, the copyright holders of this library give you
|
|
permission to link this library with independent modules to produce an
|
|
executable, regardless of the license terms of these independent
|
|
modules, and to copy and distribute the resulting executable under
|
|
terms of your choice, provided that you also meet, for each linked
|
|
independent module, the terms and conditions of the license of that
|
|
module. An independent module is a module which is not derived from
|
|
or based on this library. If you modify this library, you may extend
|
|
this exception to your version of the library, but you are not
|
|
obligated to do so. If you do not wish to do so, delete this
|
|
exception statement from your version. */
|
|
|
|
|
|
package java.sql;
|
|
|
|
import java.util.Map;
|
|
|
|
/**
|
|
* This interface provides methods for managing a connection to a database.
|
|
*
|
|
* @author Aaron M. Renn (arenn@urbanophile.com)
|
|
*/
|
|
public interface Connection
|
|
{
|
|
|
|
/**
|
|
* This transaction isolation level indicates that transactions are not
|
|
* supported.
|
|
*/
|
|
public static final int TRANSACTION_NONE = 0;
|
|
|
|
/**
|
|
* This transaction isolation level indicates that one transaction can
|
|
* read modifications by other transactions before the other transactions
|
|
* have committed their changes. This could result in invalid reads.
|
|
*/
|
|
public static final int TRANSACTION_READ_UNCOMMITTED = 1;
|
|
|
|
/**
|
|
* This transaction isolation leve indicates that only committed data from
|
|
* other transactions will be read. If a transaction reads a row, then
|
|
* another transaction commits a change to that row, the first transaction
|
|
* would retrieve the changed row on subsequent reads of the same row.
|
|
*/
|
|
public static final int TRANSACTION_READ_COMMITTED = 2;
|
|
|
|
/**
|
|
* This transaction isolation level indicates that only committed data from
|
|
* other transactions will be read. It also ensures that data read from
|
|
* a row will not be different on a subsequent read even if another
|
|
* transaction commits a change.
|
|
*/
|
|
public static final int TRANSACTION_REPEATABLE_READ = 4;
|
|
|
|
/**
|
|
* This transaction isolation level indicates that only committed data from
|
|
* other transactions will be read. It also ensures that data read from
|
|
* a row will not be different on a subsequent read even if another
|
|
* transaction commits a change. Additionally, rows modified by other
|
|
* transactions will not affect the result set returned during subsequent
|
|
* executions of the same WHERE clause in this transaction.
|
|
*/
|
|
public static final int TRANSACTION_SERIALIZABLE = 8;
|
|
|
|
/*************************************************************************/
|
|
|
|
/**
|
|
* This method creates a new SQL statement. The default result set type
|
|
* and concurrency will be used.
|
|
*
|
|
* @return A new <code>Statement</code> object.
|
|
*
|
|
* @exception SQLException If an error occurs.
|
|
*
|
|
* @see Statement
|
|
*/
|
|
public abstract Statement
|
|
createStatement() throws SQLException;
|
|
|
|
/*************************************************************************/
|
|
|
|
/**
|
|
* This method creates a new SQL statement with the specified type and
|
|
* concurrency. Valid values for these parameters are specified in the
|
|
* <code>ResultSet</code> class.
|
|
*
|
|
* @param resultSetType The type of result set to use for this statement.
|
|
* @param resultSetConcurrency. The type of concurrency to be used in
|
|
* the result set for this statement.
|
|
*
|
|
* @return A new <code>Statement</code> object.
|
|
*
|
|
* @exception SQLException If an error occurs.
|
|
*
|
|
* @see Statement
|
|
* @see ResultSet
|
|
*/
|
|
public abstract Statement
|
|
createStatement(int resultSetType, int resultSetConcurrency)
|
|
throws SQLException;
|
|
|
|
/*************************************************************************/
|
|
|
|
/**
|
|
* This method creates a new <code>PreparedStatement</code> for the specified
|
|
* SQL string. This method is designed for use with parameterized
|
|
* statements. The default result set type and concurrency will be used.
|
|
*
|
|
* @param The SQL statement to use in creating this
|
|
* <code>PreparedStatement</code>.
|
|
*
|
|
* @return A new <code>PreparedStatement</code>.
|
|
*
|
|
* @exception SQLException If an error occurs.
|
|
*
|
|
* @see PreparedStatement
|
|
*/
|
|
public abstract PreparedStatement
|
|
prepareStatement(String sql) throws SQLException;
|
|
|
|
/*************************************************************************/
|
|
|
|
/**
|
|
* This method creates a new <code>PreparedStatement</code> for the specified
|
|
* SQL string. This method is designed for use with parameterized
|
|
* statements. The specified result set type and concurrency will be used.
|
|
* Valid values for these parameters are specified in the
|
|
* <code>ResultSet</code> class.
|
|
*
|
|
* @param The SQL statement to use in creating this
|
|
* <code>PreparedStatement</code>.
|
|
* @param resultSetType The type of result set to use for this statement.
|
|
* @param resultSetConcurrency. The type of concurrency to be used in
|
|
* the result set for this statement.
|
|
*
|
|
* @return A new <code>PreparedStatement</code>.
|
|
*
|
|
* @exception SQLException If an error occurs.
|
|
*
|
|
* @see PreparedStatement
|
|
* @see ResultSet
|
|
*/
|
|
public abstract PreparedStatement
|
|
prepareStatement(String sql, int resultSetType, int resultSetConcurrency)
|
|
throws SQLException;
|
|
|
|
/*************************************************************************/
|
|
|
|
/**
|
|
* This method creates a new <code>CallableStatement</code> for the
|
|
* specified SQL string. Thie method is designed to be used with
|
|
* stored procedures. The default result set type and concurrency
|
|
* will be used.
|
|
*
|
|
* @param The SQL statement to use in creating this
|
|
* <code>CallableStatement</code>.
|
|
*
|
|
* @return A new <code>CallableStatement</code>.
|
|
*
|
|
* @exception SQLException If an error occurs.
|
|
*
|
|
* @see CallableStatement
|
|
*/
|
|
public abstract CallableStatement
|
|
prepareCall(String sql) throws SQLException;
|
|
|
|
/*************************************************************************/
|
|
|
|
/**
|
|
* This method creates a new <code>CallableStatement</code> for the
|
|
* specified SQL string. Thie method is designed to be used with
|
|
* stored procedures. The specified result set type and concurrency
|
|
* will be used. Valid values for these parameters are specified in the
|
|
* <code>ResultSet</code> class.
|
|
*
|
|
* @param The SQL statement to use in creating this
|
|
* <code>PreparedStatement</code>.
|
|
* @param resultSetType The type of result set to use for this statement.
|
|
* @param resultSetConcurrency. The type of concurrency to be used in
|
|
* the result set for this statement.
|
|
*
|
|
* @return A new <code>CallableStatement</code>.
|
|
*
|
|
* @exception SQLException If an error occurs.
|
|
*
|
|
* @see CallableStatement
|
|
* @see ResultSet
|
|
*/
|
|
public abstract CallableStatement
|
|
prepareCall(String sql, int resultSetType, int resultSetConcurrency)
|
|
throws SQLException;
|
|
|
|
/*************************************************************************/
|
|
|
|
/**
|
|
* This method converts the specified generic SQL statement into the
|
|
* native grammer of the database this object is connected to.
|
|
*
|
|
* @param The JDBC generic SQL statement.
|
|
*
|
|
* @return The native SQL statement.
|
|
*
|
|
* @exception SQLException If an error occurs.
|
|
*/
|
|
public abstract String
|
|
nativeSQL(String sql) throws SQLException;
|
|
|
|
/*************************************************************************/
|
|
|
|
/**
|
|
* This method tests whether or not auto commit mode is currently enabled.
|
|
* In auto commit mode, every SQL statement is committed its own transaction.
|
|
* Otherwise a transaction must be explicitly committed or rolled back.
|
|
*
|
|
* @return <code>true</code> if auto commit mode is enabled,
|
|
* <code>false</code> otherwise.
|
|
*
|
|
* @exception SQLException If an error occurs.
|
|
*
|
|
* @see commit
|
|
* @see rollback
|
|
*/
|
|
public abstract boolean
|
|
getAutoCommit() throws SQLException;
|
|
|
|
/*************************************************************************/
|
|
|
|
/**
|
|
* This method turns auto commit mode on or off. In auto commit mode,
|
|
* every SQL statement is committed its own transaction. Otherwise a
|
|
* transaction must be explicitly committed or rolled back.
|
|
*
|
|
* @param autoCommit <code>true</code> to enable auto commit mode,
|
|
* <code>false</code> to disable it.
|
|
*
|
|
* @exception SQLException If an error occurs.
|
|
*
|
|
* @see commit
|
|
* @see rollback
|
|
*/
|
|
public abstract void
|
|
setAutoCommit(boolean autoCommit) throws SQLException;
|
|
|
|
/*************************************************************************/
|
|
|
|
/**
|
|
* This method commits any SQL statements executed on this connection since
|
|
* the last commit or rollback.
|
|
*
|
|
* @exception SQLException If an error occurs.
|
|
*/
|
|
public abstract void
|
|
commit() throws SQLException;
|
|
|
|
/*************************************************************************/
|
|
|
|
/**
|
|
* This method rolls back any SQL statements executed on this connection
|
|
* since the last commit or rollback.
|
|
*
|
|
* @exception SQLException If an error occurs.
|
|
*/
|
|
public abstract void
|
|
rollback() throws SQLException;
|
|
|
|
/*************************************************************************/
|
|
|
|
/**
|
|
* This method immediately closes this database connection.
|
|
*
|
|
* @exception SQLException If an error occurs.
|
|
*/
|
|
public abstract void
|
|
close() throws SQLException;
|
|
|
|
/*************************************************************************/
|
|
|
|
/**
|
|
* This method tests whether or not this connection has been closed.
|
|
*
|
|
* @return <code>true</code> if the connection is closed, <code>false</code>
|
|
* otherwise.
|
|
*
|
|
* @exception SQLException If an error occurs.
|
|
*/
|
|
public abstract boolean
|
|
isClosed() throws SQLException;
|
|
|
|
/*************************************************************************/
|
|
|
|
/**
|
|
* This method returns the meta data for this database connection.
|
|
*
|
|
* @return The meta data for this database.
|
|
*
|
|
* @exception SQLException If an error occurs.
|
|
*
|
|
* @see DatabaseMetaData
|
|
*/
|
|
public abstract DatabaseMetaData
|
|
getMetaData() throws SQLException;
|
|
|
|
/*************************************************************************/
|
|
|
|
/**
|
|
* This method tests whether or not this connection is in read only mode.
|
|
*
|
|
* @return <code>true</code> if the connection is read only <code>false</code>
|
|
* otherwise.
|
|
*
|
|
* @exception SQLException If an error occurs.
|
|
*/
|
|
public abstract boolean
|
|
isReadOnly() throws SQLException;
|
|
|
|
/*************************************************************************/
|
|
|
|
/**
|
|
* This method turns read only mode on or off. It may not be called while
|
|
* a transaction is in progress.
|
|
*
|
|
* @param readOnly <code>true</code> if this connection is read only,
|
|
* <code>false</code> otherwise.
|
|
*
|
|
* @exception SQLException If an error occurs.
|
|
*/
|
|
public abstract void
|
|
setReadOnly(boolean readOnly) throws SQLException;
|
|
|
|
/*************************************************************************/
|
|
|
|
/**
|
|
* This method returns the name of the catalog in use by this connection,
|
|
* if any.
|
|
*
|
|
* @return The name of the catalog, or <code>null</code> if one does not
|
|
* exist or catalogs are not supported by this database.
|
|
*
|
|
* @exception SQLException If an error occurs.
|
|
*/
|
|
public abstract String
|
|
getCatalog() throws SQLException;
|
|
|
|
/*************************************************************************/
|
|
|
|
/**
|
|
* This method sets the name of the catalog in use by this connection.
|
|
* Note that this method does nothing if catalogs are not supported by
|
|
* this database.
|
|
*
|
|
* @param catalog The name of the catalog to use for this connection.
|
|
*
|
|
* @exception SQLException If an error occurs.
|
|
*/
|
|
public abstract void
|
|
setCatalog(String catalog) throws SQLException;
|
|
|
|
/*************************************************************************/
|
|
|
|
/**
|
|
* This method returns the current transaction isolation mode. This will
|
|
* be one of the constants defined in this interface.
|
|
*
|
|
* @return The transaction isolation level.
|
|
*
|
|
* @exception SQLException If an error occurs.
|
|
*/
|
|
public abstract int
|
|
getTransactionIsolation() throws SQLException;
|
|
|
|
/*************************************************************************/
|
|
|
|
/**
|
|
* This method sets the current transaction isolation mode. This must
|
|
* be one of the constants defined in this interface.
|
|
*
|
|
* @param level The transaction isolation level.
|
|
*
|
|
* @exception SQLException If an error occurs.
|
|
*/
|
|
public abstract void
|
|
setTransactionIsolation(int level) throws SQLException;
|
|
|
|
/*************************************************************************/
|
|
|
|
/**
|
|
* This method returns the first warning that occurred on this connection,
|
|
* if any. If there were any subsequence warnings, they will be chained
|
|
* to the first one.
|
|
*
|
|
* @return The first <code>SQLWarning</code> that occurred, or
|
|
* <code>null</code> if there have been no warnings.
|
|
*
|
|
* @exception SQLException If an error occurs.
|
|
*/
|
|
public abstract SQLWarning
|
|
getWarnings() throws SQLException;
|
|
|
|
/*************************************************************************/
|
|
|
|
/**
|
|
* This method clears all warnings that have occurred on this connection.
|
|
*
|
|
* @exception SQLException If an error occurs.
|
|
*/
|
|
public abstract void
|
|
clearWarnings() throws SQLException;
|
|
|
|
/*************************************************************************/
|
|
|
|
/**
|
|
* This method returns the mapping of SQL types to Java classes
|
|
* currently in use by this connection. This mapping will have no
|
|
* entries unless they have been manually added.
|
|
*
|
|
* @return The SQL type to Java class mapping.
|
|
*
|
|
* @exception SQLException If an error occurs.
|
|
*/
|
|
public abstract Map
|
|
getTypeMap() throws SQLException;
|
|
|
|
/*************************************************************************/
|
|
|
|
/**
|
|
* This method sets the mapping table for SQL types to Java classes.
|
|
* Any entries in this map override the defaults.
|
|
*
|
|
* @param map The new SQL mapping table.
|
|
*
|
|
* @exception SQLException If an error occurs.
|
|
*/
|
|
public abstract void
|
|
setTypeMap(Map map) throws SQLException;
|
|
|
|
} // interface Connection
|
|
|