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JDBC4StatementWrapper.java
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Created
Wed, Aug 21, 01:27
Size
7 KB
Mime Type
text/x-java
Expires
Fri, Aug 23, 01:27 (1 d, 23 h)
Engine
blob
Format
Raw Data
Handle
20048248
Attached To
R8218 ShoulderDB_ImportSegmentMeasureAnalyze
JDBC4StatementWrapper.java
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/*
Copyright (c) 2002, 2016, Oracle and/or its affiliates. All rights reserved.
The MySQL Connector/J is licensed under the terms of the GPLv2
<http://www.gnu.org/licenses/old-licenses/gpl-2.0.html>, like most MySQL Connectors.
There are special exceptions to the terms and conditions of the GPLv2 as it is applied to
this software, see the FOSS License Exception
<http://www.mysql.com/about/legal/licensing/foss-exception.html>.
This program 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; version 2
of the License.
This program 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 this
program; if not, write to the Free Software Foundation, Inc., 51 Franklin St, Fifth
Floor, Boston, MA 02110-1301 USA
*/
package
com.mysql.jdbc.jdbc2.optional
;
import
java.lang.reflect.InvocationHandler
;
import
java.lang.reflect.InvocationTargetException
;
import
java.lang.reflect.Method
;
import
java.lang.reflect.Proxy
;
import
java.sql.Array
;
import
java.sql.Blob
;
import
java.sql.Clob
;
import
java.sql.Connection
;
import
java.sql.NClob
;
import
java.sql.SQLClientInfoException
;
import
java.sql.SQLException
;
import
java.sql.SQLXML
;
import
java.sql.Savepoint
;
import
java.sql.Statement
;
import
java.sql.Struct
;
import
java.util.ArrayList
;
import
java.util.HashMap
;
import
java.util.List
;
import
java.util.Map
;
import
java.util.Properties
;
import
com.mysql.jdbc.ConnectionImpl
;
import
com.mysql.jdbc.SQLError
;
import
com.mysql.jdbc.jdbc2.optional.ConnectionWrapper
;
import
com.mysql.jdbc.jdbc2.optional.MysqlPooledConnection
;
public
class
JDBC4StatementWrapper
extends
StatementWrapper
{
public
JDBC4StatementWrapper
(
ConnectionWrapper
c
,
MysqlPooledConnection
conn
,
Statement
toWrap
)
{
super
(
c
,
conn
,
toWrap
);
}
public
void
close
()
throws
SQLException
{
try
{
super
.
close
();
}
finally
{
this
.
unwrappedInterfaces
=
null
;
}
}
public
boolean
isClosed
()
throws
SQLException
{
try
{
if
(
this
.
wrappedStmt
!=
null
)
{
return
this
.
wrappedStmt
.
isClosed
();
}
else
{
throw
SQLError
.
createSQLException
(
"Statement already closed"
,
SQLError
.
SQL_STATE_ILLEGAL_ARGUMENT
,
this
.
exceptionInterceptor
);
}
}
catch
(
SQLException
sqlEx
)
{
checkAndFireConnectionError
(
sqlEx
);
}
return
false
;
// We never get here, compiler can't tell
}
public
void
setPoolable
(
boolean
poolable
)
throws
SQLException
{
try
{
if
(
this
.
wrappedStmt
!=
null
)
{
this
.
wrappedStmt
.
setPoolable
(
poolable
);
}
else
{
throw
SQLError
.
createSQLException
(
"Statement already closed"
,
SQLError
.
SQL_STATE_ILLEGAL_ARGUMENT
,
this
.
exceptionInterceptor
);
}
}
catch
(
SQLException
sqlEx
)
{
checkAndFireConnectionError
(
sqlEx
);
}
}
public
boolean
isPoolable
()
throws
SQLException
{
try
{
if
(
this
.
wrappedStmt
!=
null
)
{
return
this
.
wrappedStmt
.
isPoolable
();
}
else
{
throw
SQLError
.
createSQLException
(
"Statement already closed"
,
SQLError
.
SQL_STATE_ILLEGAL_ARGUMENT
,
this
.
exceptionInterceptor
);
}
}
catch
(
SQLException
sqlEx
)
{
checkAndFireConnectionError
(
sqlEx
);
}
return
false
;
// We never get here, compiler can't tell
}
/**
* Returns true if this either implements the interface argument or is
* directly or indirectly a wrapper for an object that does. Returns false
* otherwise. If this implements the interface then return true, else if
* this is a wrapper then return the result of recursively calling <code>isWrapperFor</code> on the wrapped object. If this does not
* implement the interface and is not a wrapper, return false. This method
* should be implemented as a low-cost operation compared to <code>unwrap</code> so that callers can use this method to avoid
* expensive <code>unwrap</code> calls that may fail. If this method
* returns true then calling <code>unwrap</code> with the same argument
* should succeed.
*
* @param interfaces
* a Class defining an interface.
* @return true if this implements the interface or directly or indirectly
* wraps an object that does.
* @throws java.sql.SQLException
* if an error occurs while determining whether this is a
* wrapper for an object with the given interface.
* @since 1.6
*/
public
boolean
isWrapperFor
(
Class
<?>
iface
)
throws
SQLException
{
boolean
isInstance
=
iface
.
isInstance
(
this
);
if
(
isInstance
)
{
return
true
;
}
String
interfaceClassName
=
iface
.
getName
();
return
(
interfaceClassName
.
equals
(
"com.mysql.jdbc.Statement"
)
||
interfaceClassName
.
equals
(
"java.sql.Statement"
)
||
interfaceClassName
.
equals
(
"java.sql.Wrapper"
));
}
/**
* Returns an object that implements the given interface to allow access to
* non-standard methods, or standard methods not exposed by the proxy. The
* result may be either the object found to implement the interface or a
* proxy for that object. If the receiver implements the interface then that
* is the object. If the receiver is a wrapper and the wrapped object
* implements the interface then that is the object. Otherwise the object is
* the result of calling <code>unwrap</code> recursively on the wrapped
* object. If the receiver is not a wrapper and does not implement the
* interface, then an <code>SQLException</code> is thrown.
*
* @param iface
* A Class defining an interface that the result must implement.
* @return an object that implements the interface. May be a proxy for the
* actual implementing object.
* @throws java.sql.SQLException
* If no object found that implements the interface
* @since 1.6
*/
public
synchronized
<
T
>
T
unwrap
(
java
.
lang
.
Class
<
T
>
iface
)
throws
java
.
sql
.
SQLException
{
try
{
if
(
"java.sql.Statement"
.
equals
(
iface
.
getName
())
||
"java.sql.Wrapper.class"
.
equals
(
iface
.
getName
()))
{
return
iface
.
cast
(
this
);
}
if
(
unwrappedInterfaces
==
null
)
{
unwrappedInterfaces
=
new
HashMap
<
Class
<?>,
Object
>();
}
Object
cachedUnwrapped
=
unwrappedInterfaces
.
get
(
iface
);
if
(
cachedUnwrapped
==
null
)
{
cachedUnwrapped
=
Proxy
.
newProxyInstance
(
this
.
wrappedStmt
.
getClass
().
getClassLoader
(),
new
Class
<?>[]
{
iface
},
new
ConnectionErrorFiringInvocationHandler
(
this
.
wrappedStmt
));
unwrappedInterfaces
.
put
(
iface
,
cachedUnwrapped
);
}
return
iface
.
cast
(
cachedUnwrapped
);
}
catch
(
ClassCastException
cce
)
{
throw
SQLError
.
createSQLException
(
"Unable to unwrap to "
+
iface
.
toString
(),
SQLError
.
SQL_STATE_ILLEGAL_ARGUMENT
,
this
.
exceptionInterceptor
);
}
}
}
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