org.apache.commons.dbcp
Class DelegatingStatement

java.lang.Object
  |
  +--org.apache.commons.dbcp.AbandonedTrace
        |
        +--org.apache.commons.dbcp.DelegatingStatement

All Implemented Interfaces:

java.sql.Statement

public class DelegatingStatement

extends AbandonedTrace

implements java.sql.Statement

A base delegating implementation of Statement.

All of the methods from the Statement interface simply check to see that the Statement is active, and call the corresponding method on the "delegate" provided in my constructor.

Extends AbandonedTrace to implement Statement tracking and logging of code which created the Statement. Tracking the Statement ensures that the Connection which created it can close any open Statement's on Connection close.

Author:

Rodney Waldhoff (rwaldhof@us.britannica.com)

, Glenn L. Nielsen , James House (james@interobjective.com)

Field Summary

protected boolean	_closed
protected DelegatingConnection	_conn The connection that created me.
protected java.sql.Statement	_stmt My delegate.

Fields inherited from interface java.sql.Statement

CLOSE_ALL_RESULTS, CLOSE_CURRENT_RESULT, EXECUTE_FAILED, KEEP_CURRENT_RESULT, NO_GENERATED_KEYS, RETURN_GENERATED_KEYS, SUCCESS_NO_INFO

Constructor Summary

DelegatingStatement(DelegatingConnection c, java.sql.Statement s)
Create a wrapper for the Statement which traces this Statement to the Connection which created it and the code which created it.

Method Summary

protected void	activate()
void	addBatch(java.lang.String sql)
void	cancel()
protected void	checkOpen()
void	clearBatch()
void	clearWarnings()
void	close() Close this DelegatingStatement, and close any ResultSets that were not explicitly closed.
boolean	execute(java.lang.String sql)
int[]	executeBatch()
java.sql.ResultSet	executeQuery(java.lang.String sql)
int	executeUpdate(java.lang.String sql)
java.sql.Connection	getConnection()
java.sql.Statement	getDelegate() Returns my underlying Statement.
int	getFetchDirection()
int	getFetchSize()
java.sql.Statement	getInnermostDelegate() If my underlying Statement is not a DelegatingStatement, returns it, otherwise recursively invokes this method on my delegate.
int	getMaxFieldSize()
int	getMaxRows()
boolean	getMoreResults()
int	getQueryTimeout()
java.sql.ResultSet	getResultSet()
int	getResultSetConcurrency()
int	getResultSetType()
int	getUpdateCount()
java.sql.SQLWarning	getWarnings()
protected void	passivate()
void	setCursorName(java.lang.String name)
void	setDelegate(java.sql.Statement s) Sets my delegate.
void	setEscapeProcessing(boolean enable)
void	setFetchDirection(int direction)
void	setFetchSize(int rows)
void	setMaxFieldSize(int max)
void	setMaxRows(int max)
void	setQueryTimeout(int seconds)

Methods inherited from class org.apache.commons.dbcp.AbandonedTrace

addTrace, clearTrace, getConfig, getLastUsed, getTrace, printStackTrace, removeTrace, setLastUsed, setLastUsed, setStackTrace

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.sql.Statement

execute, execute, execute, executeUpdate, executeUpdate, executeUpdate, getGeneratedKeys, getMoreResults, getResultSetHoldability

Field Detail

_closed

protected boolean _closed

_conn

protected DelegatingConnection _conn

The connection that created me.

_stmt

protected java.sql.Statement _stmt

My delegate.

Constructor Detail

DelegatingStatement

public DelegatingStatement(DelegatingConnection c,
                           java.sql.Statement s)

Create a wrapper for the Statement which traces this Statement to the Connection which created it and the code which created it.

Parameters:

s - the Statement to delegate all calls to.

c - the DelegatingConnection that created this statement.

Method Detail

activate

protected void activate()

addBatch

public void addBatch(java.lang.String sql)
              throws java.sql.SQLException

Specified by:

addBatch in interface java.sql.Statement

java.sql.SQLException

cancel

public void cancel()
            throws java.sql.SQLException

Specified by:

cancel in interface java.sql.Statement

java.sql.SQLException

checkOpen

protected void checkOpen()
                  throws java.sql.SQLException

java.sql.SQLException

clearBatch

public void clearBatch()
                throws java.sql.SQLException

Specified by:

clearBatch in interface java.sql.Statement

java.sql.SQLException

clearWarnings

public void clearWarnings()
                   throws java.sql.SQLException

Specified by:

clearWarnings in interface java.sql.Statement

java.sql.SQLException

close

public void close()
           throws java.sql.SQLException

Close this DelegatingStatement, and close any ResultSets that were not explicitly closed.

Specified by:

close in interface java.sql.Statement

java.sql.SQLException

execute

public boolean execute(java.lang.String sql)
                throws java.sql.SQLException

Specified by:

execute in interface java.sql.Statement

java.sql.SQLException

executeBatch

public int[] executeBatch()
                   throws java.sql.SQLException

Specified by:

executeBatch in interface java.sql.Statement

java.sql.SQLException

executeQuery

public java.sql.ResultSet executeQuery(java.lang.String sql)
                                throws java.sql.SQLException

Specified by:

executeQuery in interface java.sql.Statement

java.sql.SQLException

executeUpdate

public int executeUpdate(java.lang.String sql)
                  throws java.sql.SQLException

Specified by:

executeUpdate in interface java.sql.Statement

java.sql.SQLException

getConnection

public java.sql.Connection getConnection()
                                  throws java.sql.SQLException

Specified by:

getConnection in interface java.sql.Statement

java.sql.SQLException

getDelegate

public java.sql.Statement getDelegate()

Returns my underlying Statement.

Returns:

my underlying Statement.

getFetchDirection

public int getFetchDirection()
                      throws java.sql.SQLException

Specified by:

getFetchDirection in interface java.sql.Statement

java.sql.SQLException

getFetchSize

public int getFetchSize()
                 throws java.sql.SQLException

Specified by:

getFetchSize in interface java.sql.Statement

java.sql.SQLException

getInnermostDelegate

public java.sql.Statement getInnermostDelegate()

If my underlying Statement is not a DelegatingStatement, returns it, otherwise recursively invokes this method on my delegate.

Hence this method will return the first delegate that is not a DelegatingStatement or null when no non-DelegatingStatement delegate can be found by transversing this chain.

This method is useful when you may have nested DelegatingStatements, and you want to make sure to obtain a "genuine" Statement.

getMaxFieldSize

public int getMaxFieldSize()
                    throws java.sql.SQLException

Specified by:

getMaxFieldSize in interface java.sql.Statement

java.sql.SQLException

getMaxRows

public int getMaxRows()
               throws java.sql.SQLException

Specified by:

getMaxRows in interface java.sql.Statement

java.sql.SQLException

getMoreResults

public boolean getMoreResults()
                       throws java.sql.SQLException

Specified by:

getMoreResults in interface java.sql.Statement

java.sql.SQLException

getQueryTimeout

public int getQueryTimeout()
                    throws java.sql.SQLException

Specified by:

getQueryTimeout in interface java.sql.Statement

java.sql.SQLException

getResultSet

public java.sql.ResultSet getResultSet()
                                throws java.sql.SQLException

Specified by:

getResultSet in interface java.sql.Statement

java.sql.SQLException

getResultSetConcurrency

public int getResultSetConcurrency()
                            throws java.sql.SQLException

Specified by:

getResultSetConcurrency in interface java.sql.Statement

java.sql.SQLException

getResultSetType

public int getResultSetType()
                     throws java.sql.SQLException

Specified by:

getResultSetType in interface java.sql.Statement

java.sql.SQLException

getUpdateCount

public int getUpdateCount()
                   throws java.sql.SQLException

Specified by:

getUpdateCount in interface java.sql.Statement

java.sql.SQLException

getWarnings

public java.sql.SQLWarning getWarnings()
                                throws java.sql.SQLException

Specified by:

getWarnings in interface java.sql.Statement

java.sql.SQLException

passivate

protected void passivate()
                  throws java.sql.SQLException

java.sql.SQLException

setCursorName

public void setCursorName(java.lang.String name)
                   throws java.sql.SQLException

Specified by:

setCursorName in interface java.sql.Statement

java.sql.SQLException

setDelegate

public void setDelegate(java.sql.Statement s)

Sets my delegate.

setEscapeProcessing

public void setEscapeProcessing(boolean enable)
                         throws java.sql.SQLException

Specified by:

setEscapeProcessing in interface java.sql.Statement

java.sql.SQLException

setFetchDirection

public void setFetchDirection(int direction)
                       throws java.sql.SQLException

Specified by:

setFetchDirection in interface java.sql.Statement

java.sql.SQLException

setFetchSize

public void setFetchSize(int rows)
                  throws java.sql.SQLException

Specified by:

setFetchSize in interface java.sql.Statement

java.sql.SQLException

setMaxFieldSize

public void setMaxFieldSize(int max)
                     throws java.sql.SQLException

Specified by:

setMaxFieldSize in interface java.sql.Statement

java.sql.SQLException

setMaxRows

public void setMaxRows(int max)
                throws java.sql.SQLException

Specified by:

setMaxRows in interface java.sql.Statement

java.sql.SQLException

setQueryTimeout

public void setQueryTimeout(int seconds)
                     throws java.sql.SQLException

Specified by:

setQueryTimeout in interface java.sql.Statement

java.sql.SQLException