com.gargoylesoftware.base.resource.jdbc
Class ConnectionWrapper

java.lang.Object
  extended by com.gargoylesoftware.base.resource.jdbc.ConnectionWrapper
All Implemented Interfaces:
ManagedResource, java.sql.Connection, java.sql.Wrapper

public final class ConnectionWrapper
extends java.lang.Object
implements java.sql.Connection, ManagedResource

A wrapper for java.sql.Connection objects.

The contract with JDBC says that result sets must be closed before statements and statements must be closed before connections but java does not enforce this contract. It is quite possible to close a connection while statements and result sets are still open. While some database drivers handle this condition nicely, others will start failing in undefined ways when this happens.

This wrapper class is a solution to this problem. If the connection is only accessed through the wrapper then the wrapper will ensure that everything is closed in the correct order. It will also ensure that the various jdbc objects (connections, statements, result sets and metadata) cannot be used after they are closed.

This class was created for the JDBCResourceFactory but can be used by itself.

Version:
$Revision: 1.6 $
Author:
Mike Bowler

Field Summary
private  java.sql.Connection delegate_
           
private  boolean isOpen_
           
private  java.util.List openDatabaseMetaData_
           
private  java.util.List openStatements_
           
private  java.lang.String resourceFactoryName_
           
 
Fields inherited from interface java.sql.Connection
TRANSACTION_NONE, TRANSACTION_READ_COMMITTED, TRANSACTION_READ_UNCOMMITTED, TRANSACTION_REPEATABLE_READ, TRANSACTION_SERIALIZABLE
 
Constructor Summary
ConnectionWrapper(java.sql.Connection connection)
          Create a new connection wrapper
 
Method Summary
private  void checkConnection()
          Check to see if the connection is still open.
 void clearWarnings()
          Clears all warnings reported for this Connection object.
 void close()
          Releases a Connection's database and JDBC resources immediately instead of waiting for them to be automatically released.
 void closeAnyOpenMetaDatas()
          Close any open DatabaseMetaData objects
 void closeAnyOpenStatements()
          Close any open statements
 void commit()
          Makes all changes made since the previous commit/rollback permanent and releases any database locks currently held by the Connection.
 java.sql.Array createArrayOf(java.lang.String typeName, java.lang.Object[] elements)
           
 java.sql.Blob createBlob()
           
 java.sql.Clob createClob()
           
 java.sql.NClob createNClob()
           
 java.sql.SQLXML createSQLXML()
           
 java.sql.Statement createStatement()
          Creates a Statement object for sending SQL statements to the database.
 java.sql.Statement createStatement(int resultSetType, int resultSetConcurrency)
          Creates a Statement object that will generate ResultSet objects with the given type and concurrency.
 java.sql.Statement createStatement(int resultSetType, int resultSetConcurrency, int resultSetHoldability)
          Creates a Statement object that will generate ResultSet objects with the given type, concurrency, and holdability.
 java.sql.Struct createStruct(java.lang.String typeName, java.lang.Object[] attributes)
           
 boolean getAutoCommit()
          Gets the current auto-commit state.
 java.lang.String getCatalog()
          Returns the Connection's current catalog name.
 java.util.Properties getClientInfo()
           
 java.lang.String getClientInfo(java.lang.String name)
           
 java.sql.Connection getDelegate()
          Return the wrapped connection
 int getHoldability()
          Retrieves the current holdability of ResultSet objects created using this Connection object.
 java.sql.DatabaseMetaData getMetaData()
          Gets the metadata regarding this connection's database.
 int getOpenStatementCount()
          Return the number of statements that are currently open.
 java.lang.String getResourceFactoryName()
          Return the name of the factory that allocated this connection
 int getTransactionIsolation()
          Gets this Connection's current transaction isolation level.
 java.util.Map getTypeMap()
          Gets the type map object associated with this connection.
 java.sql.SQLWarning getWarnings()
          Returns the first warning reported by calls on this Connection.
 boolean isClosed()
          Tests to see if a Connection is closed.
 boolean isReadOnly()
          Tests to see if the connection is in read-only mode.
 boolean isValid(int timeout)
           
 boolean isWrapperFor(java.lang.Class<?> iface)
           
 java.lang.String nativeSQL(java.lang.String sql)
          Converts the given SQL statement into the system's native SQL grammar.
 java.sql.CallableStatement prepareCall(java.lang.String sql)
          Creates a CallableStatement object for calling database stored procedures.
 java.sql.CallableStatement prepareCall(java.lang.String sql, int resultSetType, int resultSetConcurrency)
          Creates a CallableStatement object that will generate ResultSet objects with the given type and concurrency.
 java.sql.CallableStatement prepareCall(java.lang.String sql, int resultSetType, int resultSetConcurrency, int resultSetHoldability)
          Creates a CallableStatement object that will generate ResultSet objects with the given type and concurrency.
 java.sql.PreparedStatement prepareStatement(java.lang.String sql)
          Creates a PreparedStatement object for sending parameterized SQL statements to the database.
 java.sql.PreparedStatement prepareStatement(java.lang.String sql, int autoGeneratedKeys)
          Creates a default PreparedStatement object that has the capability to retrieve auto-generated keys.
 java.sql.PreparedStatement prepareStatement(java.lang.String sql, int[] columnIndexes)
          Creates a default PreparedStatement object capable of returning the auto-generated keys designated by the given array.
 java.sql.PreparedStatement prepareStatement(java.lang.String sql, int resultSetType, int resultSetConcurrency)
          Creates a PreparedStatement object that will generate ResultSet objects with the given type and concurrency.
 java.sql.PreparedStatement prepareStatement(java.lang.String sql, int resultSetType, int resultSetConcurrency, int resultSetHoldability)
          Creates a PreparedStatement object that will generate ResultSet objects with the given type, concurrency, and holdability.
 java.sql.PreparedStatement prepareStatement(java.lang.String sql, java.lang.String[] columnNames)
          Creates a default PreparedStatement object capable of returning the auto-generated keys designated by the given array.
 void releaseSavepoint(java.sql.Savepoint savepoint)
          Removes the given Savepoint object from the current transaction.
 void rollback()
          Drops all changes made since the previous commit/rollback and releases any database locks currently held by this Connection.
 void rollback(java.sql.Savepoint savepoint)
          Undoes all changes made after the given Savepoint object was set.
 void setAutoCommit(boolean autoCommit)
          Sets this connection's auto-commit mode.
 void setCatalog(java.lang.String catalog)
          Sets a catalog name in order to select a subspace of this Connection's database in which to work.
 void setClientInfo(java.util.Properties properties)
           
 void setClientInfo(java.lang.String name, java.lang.String value)
           
 void setHoldability(int holdability)
          Changes the holdability of ResultSet objects created using this Connection object to the given holdability.
 void setReadOnly(boolean readOnly)
          Puts this connection in read-only mode as a hint to enable database optimizations.
 void setResourceFactoryName(java.lang.String name)
          Set the name of the factory that allocated this connection
 java.sql.Savepoint setSavepoint()
          Creates an unnamed savepoint in the current transaction and returns the new Savepoint object that represents it.
 java.sql.Savepoint setSavepoint(java.lang.String name)
          Creates a savepoint with the given name in the current transaction and returns the new Savepoint object that represents it.
 void setTransactionIsolation(int level)
          Attempts to change the transaction isolation level to the one given.
 void setTypeMap(java.util.Map map)
          Installs the given type map as the type map for this connection.
<T> T
unwrap(java.lang.Class<T> iface)
           
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Field Detail

delegate_

private java.sql.Connection delegate_

isOpen_

private boolean isOpen_

resourceFactoryName_

private java.lang.String resourceFactoryName_

openStatements_

private final java.util.List openStatements_

openDatabaseMetaData_

private final java.util.List openDatabaseMetaData_
Constructor Detail

ConnectionWrapper

public ConnectionWrapper(java.sql.Connection connection)
Create a new connection wrapper

Parameters:
connection - The connection that we are wrapping
Method Detail

setResourceFactoryName

public final void setResourceFactoryName(java.lang.String name)
Set the name of the factory that allocated this connection

Specified by:
setResourceFactoryName in interface ManagedResource
Parameters:
name - The name of the factory

setAutoCommit

public void setAutoCommit(boolean autoCommit)
                   throws java.sql.SQLException
Sets this connection's auto-commit mode. If a connection is in auto-commit mode, then all its SQL statements will be executed and committed as individual transactions. Otherwise, its SQL statements are grouped into transactions that are terminated by a call to either the method commit or the method rollback. By default, new connections are in auto-commit mode.

The commit occurs when the statement completes or the next execute occurs, whichever comes first. In the case of statements returning a ResultSet, the statement completes when the last row of the ResultSet has been retrieved or the ResultSet has been closed. In advanced cases, a single statement may return multiple results as well as output parameter values. In these cases the commit occurs when all results and output parameter values have been retrieved.

Specified by:
setAutoCommit in interface java.sql.Connection
Parameters:
autoCommit - true enables auto-commit; false disables auto-commit.
Throws:
java.sql.SQLException - if a database access error occurs

setReadOnly

public void setReadOnly(boolean readOnly)
                 throws java.sql.SQLException
Puts this connection in read-only mode as a hint to enable database optimizations.

Note: This method cannot be called while in the middle of a transaction.

Specified by:
setReadOnly in interface java.sql.Connection
Parameters:
readOnly - true enables read-only mode; false disables read-only mode.
Throws:
java.sql.SQLException - if a database access error occurs

setCatalog

public void setCatalog(java.lang.String catalog)
                throws java.sql.SQLException
Sets a catalog name in order to select a subspace of this Connection's database in which to work. If the driver does not support catalogs, it will silently ignore this request.

Specified by:
setCatalog in interface java.sql.Connection
Parameters:
catalog - The catalog name
Throws:
java.sql.SQLException - if a database access error occurs

setTransactionIsolation

public void setTransactionIsolation(int level)
                             throws java.sql.SQLException
Attempts to change the transaction isolation level to the one given. The constants defined in the interface Connection are the possible transaction isolation levels.

Note: This method cannot be called while in the middle of a transaction.

Specified by:
setTransactionIsolation in interface java.sql.Connection
Parameters:
level - one of the TRANSACTION_* isolation values with the exception of TRANSACTION_NONE; some databases may not support other values
Throws:
java.sql.SQLException - if a database access error occurs

setTypeMap

public void setTypeMap(java.util.Map map)
                throws java.sql.SQLException
Installs the given type map as the type map for this connection. The type map will be used for the custom mapping of SQL structured types and distinct types.

Specified by:
setTypeMap in interface java.sql.Connection
Parameters:
map - the java.util.Map object to install as the replacement for this Connection object's default type map
Throws:
java.sql.SQLException - If a sql error occurs
Since:
1.2

getResourceFactoryName

public final java.lang.String getResourceFactoryName()
Return the name of the factory that allocated this connection

Specified by:
getResourceFactoryName in interface ManagedResource
Returns:
The name of the factory

getDelegate

public final java.sql.Connection getDelegate()
Return the wrapped connection

Returns:
The wrapped connection

getAutoCommit

public boolean getAutoCommit()
                      throws java.sql.SQLException
Gets the current auto-commit state.

Specified by:
getAutoCommit in interface java.sql.Connection
Returns:
the current state of auto-commit mode
Throws:
java.sql.SQLException - if a database access error occurs
See Also:
setAutoCommit(boolean)

isClosed

public boolean isClosed()
                 throws java.sql.SQLException
Tests to see if a Connection is closed.

Specified by:
isClosed in interface java.sql.Connection
Returns:
true if the connection is closed; false if it's still open
Throws:
java.sql.SQLException - if a database access error occurs

getMetaData

public java.sql.DatabaseMetaData getMetaData()
                                      throws java.sql.SQLException
Gets the metadata regarding this connection's database. A Connection's database is able to provide information describing its tables, its supported SQL grammar, its stored procedures, the capabilities of this connection, and so on. This information is made available through a DatabaseMetaData object.

Specified by:
getMetaData in interface java.sql.Connection
Returns:
a DatabaseMetaData object for this Connection
Throws:
java.sql.SQLException - if a database access error occurs

isReadOnly

public boolean isReadOnly()
                   throws java.sql.SQLException
Tests to see if the connection is in read-only mode.

Specified by:
isReadOnly in interface java.sql.Connection
Returns:
true if connection is read-only and false otherwise
Throws:
java.sql.SQLException - if a database access error occurs

getCatalog

public java.lang.String getCatalog()
                            throws java.sql.SQLException
Returns the Connection's current catalog name.

Specified by:
getCatalog in interface java.sql.Connection
Returns:
the current catalog name or null
Throws:
java.sql.SQLException - if a database access error occurs

getTransactionIsolation

public int getTransactionIsolation()
                            throws java.sql.SQLException
Gets this Connection's current transaction isolation level.

Specified by:
getTransactionIsolation in interface java.sql.Connection
Returns:
the current TRANSACTION_* mode value
Throws:
java.sql.SQLException - if a database access error occurs

getWarnings

public java.sql.SQLWarning getWarnings()
                                throws java.sql.SQLException
Returns the first warning reported by calls on this Connection.

Note: Subsequent warnings will be chained to this SQLWarning.

Specified by:
getWarnings in interface java.sql.Connection
Returns:
the first SQLWarning or null
Throws:
java.sql.SQLException - if a database access error occurs

getTypeMap

public java.util.Map getTypeMap()
                         throws java.sql.SQLException
Gets the type map object associated with this connection. Unless the application has added an entry to the type map, the map returned will be empty.

Specified by:
getTypeMap in interface java.sql.Connection
Returns:
the java.util.Map object associated with this Connection object
Throws:
java.sql.SQLException - If a sql error occurs
Since:
1.2

createStatement

public java.sql.Statement createStatement()
                                   throws java.sql.SQLException
Creates a Statement object for sending SQL statements to the database. SQL statements without parameters are normally executed using Statement objects. If the same SQL statement is executed many times, it is more efficient to use a PreparedStatement object.

Result sets created using the returned Statement object will by default have forward-only type and read-only concurrency.

Specified by:
createStatement in interface java.sql.Connection
Returns:
a new Statement object
Throws:
java.sql.SQLException - if a database access error occurs

prepareStatement

public java.sql.PreparedStatement prepareStatement(java.lang.String sql)
                                            throws java.sql.SQLException
Creates a PreparedStatement object for sending parameterized SQL statements to the database. A SQL statement with or without IN parameters can be pre-compiled and stored in a PreparedStatement object. This object can then be used to efficiently execute this statement multiple times.

Note: This method is optimized for handling parametric SQL statements that benefit from precompilation. If the driver supports precompilation, the method prepareStatement will send the statement to the database for precompilation. Some drivers may not support precompilation. In this case, the statement may not be sent to the database until the PreparedStatement is executed. This has no direct effect on users; however, it does affect which method throws certain SQLExceptions.

Result sets created using the returned PreparedStatement will have forward-only type and read-only concurrency, by default.

Specified by:
prepareStatement in interface java.sql.Connection
Parameters:
sql - a SQL statement that may contain one or more '?' IN parameter placeholders
Returns:
a new PreparedStatement object containing the pre-compiled statement
Throws:
java.sql.SQLException - if a database access error occurs

prepareCall

public java.sql.CallableStatement prepareCall(java.lang.String sql)
                                       throws java.sql.SQLException
Creates a CallableStatement object for calling database stored procedures. The CallableStatement object provides methods for setting up its IN and OUT parameters, and methods for executing the call to a stored procedure.

Note: This method is optimized for handling stored procedure call statements. Some drivers may send the call statement to the database when the method prepareCall is done; others may wait until the CallableStatement object is executed. This has no direct effect on users; however, it does affect which method throws certain SQLExceptions. Result sets created using the returned CallableStatement will have forward-only type and read-only concurrency, by default.

Specified by:
prepareCall in interface java.sql.Connection
Parameters:
sql - a SQL statement that may contain one or more '?' parameter placeholders. Typically this statement is a JDBC function call escape string.
Returns:
a new CallableStatement object containing the pre-compiled SQL statement
Throws:
java.sql.SQLException - if a database access error occurs

nativeSQL

public java.lang.String nativeSQL(java.lang.String sql)
                           throws java.sql.SQLException
Converts the given SQL statement into the system's native SQL grammar. A driver may convert the JDBC sql grammar into its system's native SQL grammar prior to sending it; this method returns the native form of the statement that the driver would have sent.

Specified by:
nativeSQL in interface java.sql.Connection
Parameters:
sql - a SQL statement that may contain one or more '?' parameter placeholders
Returns:
the native form of this statement
Throws:
java.sql.SQLException - if a database access error occurs

commit

public void commit()
            throws java.sql.SQLException
Makes all changes made since the previous commit/rollback permanent and releases any database locks currently held by the Connection. This method should be used only when auto-commit mode has been disabled.

Specified by:
commit in interface java.sql.Connection
Throws:
java.sql.SQLException - if a database access error occurs
See Also:
setAutoCommit(boolean)

rollback

public void rollback()
              throws java.sql.SQLException
Drops all changes made since the previous commit/rollback and releases any database locks currently held by this Connection. This method should be used only when auto- commit has been disabled.

Specified by:
rollback in interface java.sql.Connection
Throws:
java.sql.SQLException - if a database access error occurs
See Also:
setAutoCommit(boolean)

close

public void close()
           throws java.sql.SQLException
Releases a Connection's database and JDBC resources immediately instead of waiting for them to be automatically released.

Note: A Connection is automatically closed when it is garbage collected. Certain fatal errors also result in a closed Connection.

Specified by:
close in interface java.sql.Connection
Throws:
java.sql.SQLException - if a database access error occurs

closeAnyOpenStatements

public void closeAnyOpenStatements()
                            throws java.sql.SQLException
Close any open statements

Throws:
java.sql.SQLException - If an error occurs

closeAnyOpenMetaDatas

public void closeAnyOpenMetaDatas()
                           throws java.sql.SQLException
Close any open DatabaseMetaData objects

Throws:
java.sql.SQLException - If an error occurs

clearWarnings

public void clearWarnings()
                   throws java.sql.SQLException
Clears all warnings reported for this Connection object. After a call to this method, the method getWarnings returns null until a new warning is reported for this Connection.

Specified by:
clearWarnings in interface java.sql.Connection
Throws:
java.sql.SQLException - if a database access error occurs

createStatement

public java.sql.Statement createStatement(int resultSetType,
                                          int resultSetConcurrency)
                                   throws java.sql.SQLException
Creates a Statement object that will generate ResultSet objects with the given type and concurrency. This method is the same as the createStatement method above, but it allows the default result set type and result set concurrency type to be overridden.

Specified by:
createStatement in interface java.sql.Connection
Parameters:
resultSetType - a result set type; see ResultSet.TYPE_XXX
resultSetConcurrency - a concurrency type; see ResultSet.CONCUR_XXX
Returns:
a new Statement object
Throws:
java.sql.SQLException - if a database access error occurs
Since:
1.2

prepareStatement

public java.sql.PreparedStatement prepareStatement(java.lang.String sql,
                                                   int resultSetType,
                                                   int resultSetConcurrency)
                                            throws java.sql.SQLException
Creates a PreparedStatement object that will generate ResultSet objects with the given type and concurrency. This method is the same as the prepareStatement method above, but it allows the default result set type and result set concurrency type to be overridden.

Specified by:
prepareStatement in interface java.sql.Connection
Parameters:
sql - a SQL statement that may contain one or more '?' parameter placeholders. Typically this statement is a JDBC function call escape string.
resultSetType - a result set type; see ResultSet.TYPE_XXX
resultSetConcurrency - a concurrency type; see ResultSet.CONCUR_XXX
Returns:
a new PreparedStatement object containing the pre-compiled SQL statement
Throws:
java.sql.SQLException - if a database access error occurs
Since:
1.2

prepareCall

public java.sql.CallableStatement prepareCall(java.lang.String sql,
                                              int resultSetType,
                                              int resultSetConcurrency)
                                       throws java.sql.SQLException
Creates a CallableStatement object that will generate ResultSet objects with the given type and concurrency. This method is the same as the prepareCall method above, but it allows the default result set type and result set concurrency type to be overridden.

Specified by:
prepareCall in interface java.sql.Connection
Parameters:
sql - a SQL statement that may contain one or more '?' parameter placeholders. Typically this statement is a JDBC function call escape string.
resultSetType - a result set type; see ResultSet.TYPE_XXX
resultSetConcurrency - a concurrency type; see ResultSet.CONCUR_XXX
Returns:
a new CallableStatement object containing the pre-compiled SQL statement
Throws:
java.sql.SQLException - if a database access error occurs
Since:
1.2

checkConnection

private void checkConnection()
                      throws java.sql.SQLException
Check to see if the connection is still open. If not, throw an exception.

Throws:
java.sql.SQLException

getOpenStatementCount

public int getOpenStatementCount()
Return the number of statements that are currently open. Useful for debugging purposes.

Returns:
The number of statements that are currently open.

setHoldability

public void setHoldability(int holdability)
                    throws java.sql.SQLException
Changes the holdability of ResultSet objects created using this Connection object to the given holdability.

Specified by:
setHoldability in interface java.sql.Connection
Parameters:
holdability - a ResultSet holdability constant; one of ResultSet.HOLD_CURSORS_OVER_COMMIT or ResultSet.CLOSE_CURSORS_AT_COMMIT
Throws:
java.sql.SQLException - if a database access occurs, the given parameter is not a ResultSet constant indicating holdability, or the given holdability is not supported
Since:
1.4
See Also:
getHoldability(), ResultSet

getHoldability

public int getHoldability()
                   throws java.sql.SQLException
Retrieves the current holdability of ResultSet objects created using this Connection object.

Specified by:
getHoldability in interface java.sql.Connection
Returns:
the holdability, one of ResultSet.HOLD_CURSORS_OVER_COMMIT or ResultSet.CLOSE_CURSORS_AT_COMMIT
Throws:
java.sql.SQLException - if a database access occurs
Since:
1.4
See Also:
setHoldability(int), ResultSet

setSavepoint

public java.sql.Savepoint setSavepoint()
                                throws java.sql.SQLException
Creates an unnamed savepoint in the current transaction and returns the new Savepoint object that represents it.

Specified by:
setSavepoint in interface java.sql.Connection
Returns:
the new Savepoint object
Throws:
java.sql.SQLException - if a database access error occurs or this Connection object is currently in auto-commit mode
Since:
1.4
See Also:
Savepoint

setSavepoint

public java.sql.Savepoint setSavepoint(java.lang.String name)
                                throws java.sql.SQLException
Creates a savepoint with the given name in the current transaction and returns the new Savepoint object that represents it.

Specified by:
setSavepoint in interface java.sql.Connection
Parameters:
name - a String containing the name of the savepoint
Returns:
the new Savepoint object
Throws:
java.sql.SQLException - if a database access error occurs or this Connection object is currently in auto-commit mode
Since:
1.4
See Also:
Savepoint

rollback

public void rollback(java.sql.Savepoint savepoint)
              throws java.sql.SQLException
Undoes all changes made after the given Savepoint object was set.

This method should be used only when auto-commit has been disabled.

Specified by:
rollback in interface java.sql.Connection
Parameters:
savepoint - the Savepoint object to roll back to
Throws:
java.sql.SQLException - if a database access error occurs, the Savepoint object is no longer valid, or this Connection object is currently in auto-commit mode
Since:
1.4
See Also:
Savepoint

releaseSavepoint

public void releaseSavepoint(java.sql.Savepoint savepoint)
                      throws java.sql.SQLException
Removes the given Savepoint object from the current transaction. Any reference to the savepoint after it have been removed will cause an SQLException to be thrown.

Specified by:
releaseSavepoint in interface java.sql.Connection
Parameters:
savepoint - the Savepoint object to be removed
Throws:
java.sql.SQLException - if a database access error occurs or the given Savepoint object is not a valid savepoint in the current transaction
Since:
1.4

createStatement

public java.sql.Statement createStatement(int resultSetType,
                                          int resultSetConcurrency,
                                          int resultSetHoldability)
                                   throws java.sql.SQLException
Creates a Statement object that will generate ResultSet objects with the given type, concurrency, and holdability. This method is the same as the createStatement method above, but it allows the default result set type, concurrency, and holdability to be overridden.

Specified by:
createStatement in interface java.sql.Connection
Parameters:
resultSetType - one of the following ResultSet constants: ResultSet.TYPE_FORWARD_ONLY, ResultSet.TYPE_SCROLL_INSENSITIVE, or ResultSet.TYPE_SCROLL_SENSITIVE
resultSetConcurrency - one of the following ResultSet constants: ResultSet.CONCUR_READ_ONLY or ResultSet.CONCUR_UPDATABLE
resultSetHoldability - one of the following ResultSet constants: ResultSet.HOLD_CURSORS_OVER_COMMIT or ResultSet.CLOSE_CURSORS_AT_COMMIT
Returns:
a new Statement object that will generate ResultSet objects with the given type, concurrency, and holdability
Throws:
java.sql.SQLException - if a database access error occurs or the given parameters are not ResultSet constants indicating type, concurrency, and holdability
Since:
1.4
See Also:
ResultSet

prepareStatement

public java.sql.PreparedStatement prepareStatement(java.lang.String sql,
                                                   int resultSetType,
                                                   int resultSetConcurrency,
                                                   int resultSetHoldability)
                                            throws java.sql.SQLException
Creates a PreparedStatement object that will generate ResultSet objects with the given type, concurrency, and holdability.

This method is the same as the prepareStatement method above, but it allows the default result set type, concurrency, and holdability to be overridden.

Specified by:
prepareStatement in interface java.sql.Connection
Parameters:
sql - a String object that is the SQL statement to be sent to the database; may contain one or more ? IN parameters
resultSetType - one of the following ResultSet constants: ResultSet.TYPE_FORWARD_ONLY, ResultSet.TYPE_SCROLL_INSENSITIVE, or ResultSet.TYPE_SCROLL_SENSITIVE
resultSetConcurrency - one of the following ResultSet constants: ResultSet.CONCUR_READ_ONLY or ResultSet.CONCUR_UPDATABLE
resultSetHoldability - one of the following ResultSet constants: ResultSet.HOLD_CURSORS_OVER_COMMIT or ResultSet.CLOSE_CURSORS_AT_COMMIT
Returns:
a new PreparedStatement object, containing the pre-compiled SQL statement, that will generate ResultSet objects with the given type, concurrency, and holdability
Throws:
java.sql.SQLException - if a database access error occurs or the given parameters are not ResultSet constants indicating type, concurrency, and holdability
Since:
1.4
See Also:
ResultSet

prepareCall

public java.sql.CallableStatement prepareCall(java.lang.String sql,
                                              int resultSetType,
                                              int resultSetConcurrency,
                                              int resultSetHoldability)
                                       throws java.sql.SQLException
Creates a CallableStatement object that will generate ResultSet objects with the given type and concurrency. This method is the same as the prepareCall method above, but it allows the default result set type, result set concurrency type and holdability to be overridden.

Specified by:
prepareCall in interface java.sql.Connection
Parameters:
sql - a String object that is the SQL statement to be sent to the database; may contain on or more ? parameters
resultSetType - one of the following ResultSet constants: ResultSet.TYPE_FORWARD_ONLY, ResultSet.TYPE_SCROLL_INSENSITIVE, or ResultSet.TYPE_SCROLL_SENSITIVE
resultSetConcurrency - one of the following ResultSet constants: ResultSet.CONCUR_READ_ONLY or ResultSet.CONCUR_UPDATABLE
resultSetHoldability - one of the following ResultSet constants: ResultSet.HOLD_CURSORS_OVER_COMMIT or ResultSet.CLOSE_CURSORS_AT_COMMIT
Returns:
a new CallableStatement object, containing the pre-compiled SQL statement, that will generate ResultSet objects with the given type, concurrency, and holdability
Throws:
java.sql.SQLException - if a database access error occurs or the given parameters are not ResultSet constants indicating type, concurrency, and holdability
Since:
1.4
See Also:
ResultSet

prepareStatement

public java.sql.PreparedStatement prepareStatement(java.lang.String sql,
                                                   int autoGeneratedKeys)
                                            throws java.sql.SQLException
Creates a default PreparedStatement object that has the capability to retrieve auto-generated keys. The given constant tells the driver whether it should make auto-generated keys available for retrieval. This parameter is ignored if the SQL statement is not an INSERT statement.

Note: This method is optimized for handling parametric SQL statements that benefit from precompilation. If the driver supports precompilation, the method prepareStatement will send the statement to the database for precompilation. Some drivers may not support precompilation. In this case, the statement may not be sent to the database until the PreparedStatement object is executed. This has no direct effect on users; however, it does affect which methods throw certain SQLExceptions.

Result sets created using the returned PreparedStatement object will by default be type TYPE_FORWARD_ONLY and have a concurrency level of CONCUR_READ_ONLY.

Specified by:
prepareStatement in interface java.sql.Connection
Parameters:
sql - an SQL statement that may contain one or more '?' IN parameter placeholders
autoGeneratedKeys - a flag indicating whether auto-generated keys should be returned; one of Statement.RETURN_GENERATED_KEYS or Statement.NO_GENERATED_KEYS
Returns:
a new PreparedStatement object, containing the pre-compiled SQL statement, that will have the capability of returning auto-generated keys
Throws:
java.sql.SQLException - if a database access error occurs or the given parameter is not a Statement constant indicating whether auto-generated keys should be returned
Since:
1.4

prepareStatement

public java.sql.PreparedStatement prepareStatement(java.lang.String sql,
                                                   int[] columnIndexes)
                                            throws java.sql.SQLException
Creates a default PreparedStatement object capable of returning the auto-generated keys designated by the given array. This array contains the indexes of the columns in the target table that contain the auto-generated keys that should be made available. This array is ignored if the SQL statement is not an INSERT statement.

An SQL statement with or without IN parameters can be pre-compiled and stored in a PreparedStatement object. This object can then be used to efficiently execute this statement multiple times.

Note: This method is optimized for handling parametric SQL statements that benefit from precompilation. If the driver supports precompilation, the method prepareStatement will send the statement to the database for precompilation. Some drivers may not support precompilation. In this case, the statement may not be sent to the database until the PreparedStatement object is executed. This has no direct effect on users; however, it does affect which methods throw certain SQLExceptions.

Result sets created using the returned PreparedStatement object will by default be type TYPE_FORWARD_ONLY and have a concurrency level of CONCUR_READ_ONLY.

Specified by:
prepareStatement in interface java.sql.Connection
Parameters:
sql - an SQL statement that may contain one or more '?' IN parameter placeholders
columnIndexes - an array of column indexes indicating the columns that should be returned from the inserted row or rows
Returns:
a new PreparedStatement object, containing the pre-compiled statement, that is capable of returning the auto-generated keys designated by the given array of column indexes
Throws:
java.sql.SQLException - if a database access error occurs
Since:
1.4

prepareStatement

public java.sql.PreparedStatement prepareStatement(java.lang.String sql,
                                                   java.lang.String[] columnNames)
                                            throws java.sql.SQLException
Creates a default PreparedStatement object capable of returning the auto-generated keys designated by the given array. This array contains the names of the columns in the target table that contain the auto-generated keys that should be returned. This array is ignored if the SQL statement is not an INSERT statement.

An SQL statement with or without IN parameters can be pre-compiled and stored in a PreparedStatement object. This object can then be used to efficiently execute this statement multiple times.

Note: This method is optimized for handling parametric SQL statements that benefit from precompilation. If the driver supports precompilation, the method prepareStatement will send the statement to the database for precompilation. Some drivers may not support precompilation. In this case, the statement may not be sent to the database until the PreparedStatement object is executed. This has no direct effect on users; however, it does affect which methods throw certain SQLExceptions.

Result sets created using the returned PreparedStatement object will by default be type TYPE_FORWARD_ONLY and have a concurrency level of CONCUR_READ_ONLY.

Specified by:
prepareStatement in interface java.sql.Connection
Parameters:
sql - an SQL statement that may contain one or more '?' IN parameter placeholders
columnNames - an array of column names indicating the columns that should be returned from the inserted row or rows
Returns:
a new PreparedStatement object, containing the pre-compiled statement, that is capable of returning the auto-generated keys designated by the given array of column names
Throws:
java.sql.SQLException - if a database access error occurs
Since:
1.4

createClob

public java.sql.Clob createClob()
                         throws java.sql.SQLException
Specified by:
createClob in interface java.sql.Connection
Throws:
java.sql.SQLException

createBlob

public java.sql.Blob createBlob()
                         throws java.sql.SQLException
Specified by:
createBlob in interface java.sql.Connection
Throws:
java.sql.SQLException

createNClob

public java.sql.NClob createNClob()
                           throws java.sql.SQLException
Specified by:
createNClob in interface java.sql.Connection
Throws:
java.sql.SQLException

createSQLXML

public java.sql.SQLXML createSQLXML()
                             throws java.sql.SQLException
Specified by:
createSQLXML in interface java.sql.Connection
Throws:
java.sql.SQLException

isValid

public boolean isValid(int timeout)
                throws java.sql.SQLException
Specified by:
isValid in interface java.sql.Connection
Throws:
java.sql.SQLException

setClientInfo

public void setClientInfo(java.lang.String name,
                          java.lang.String value)
                   throws java.sql.SQLClientInfoException
Specified by:
setClientInfo in interface java.sql.Connection
Throws:
java.sql.SQLClientInfoException

setClientInfo

public void setClientInfo(java.util.Properties properties)
                   throws java.sql.SQLClientInfoException
Specified by:
setClientInfo in interface java.sql.Connection
Throws:
java.sql.SQLClientInfoException

getClientInfo

public java.lang.String getClientInfo(java.lang.String name)
                               throws java.sql.SQLException
Specified by:
getClientInfo in interface java.sql.Connection
Throws:
java.sql.SQLException

getClientInfo

public java.util.Properties getClientInfo()
                                   throws java.sql.SQLException
Specified by:
getClientInfo in interface java.sql.Connection
Throws:
java.sql.SQLException

createArrayOf

public java.sql.Array createArrayOf(java.lang.String typeName,
                                    java.lang.Object[] elements)
                             throws java.sql.SQLException
Specified by:
createArrayOf in interface java.sql.Connection
Throws:
java.sql.SQLException

createStruct

public java.sql.Struct createStruct(java.lang.String typeName,
                                    java.lang.Object[] attributes)
                             throws java.sql.SQLException
Specified by:
createStruct in interface java.sql.Connection
Throws:
java.sql.SQLException

unwrap

public <T> T unwrap(java.lang.Class<T> iface)
         throws java.sql.SQLException
Specified by:
unwrap in interface java.sql.Wrapper
Throws:
java.sql.SQLException

isWrapperFor

public boolean isWrapperFor(java.lang.Class<?> iface)
                     throws java.sql.SQLException
Specified by:
isWrapperFor in interface java.sql.Wrapper
Throws:
java.sql.SQLException