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com.mysql.cj.jdbc

pack-priv abstract Class WrapperBase

extends Object
Class Inheritance
Known Direct Subclasses
com.mysql.cj.jdbc.ConnectionWrapper, com.mysql.cj.jdbc.StatementWrapper
Imports
java.lang.reflect.InvocationHandler, .InvocationTargetException, .Method, .Proxy, java.sql.SQLException, java.util.Map, com.mysql.cj.exceptions.ExceptionInterceptor, .MysqlErrorNumbers, com.mysql.cj.util.Util

Base class for all wrapped instances created by LogicalHandle

Nested and Inner Type Summary

Modifier and TypeClass and Description
protected class

Field Summary

Modifier and TypeField and Description
protected ExceptionInterceptor
protected MysqlPooledConnection
protected Map<Class<?>, Object>

Constructor Summary

AccessConstructor and Description
protected

Method Summary

Modifier and TypeMethod and Description
protected void
checkAndFireConnectionError(SQLException
the SQLException that has occurred
sqlEx
)

Fires connection error event if required, before re-throwing exception

Inherited from java.lang.Object:
cloneequalsfinalizegetClasshashCodenotifynotifyAlltoStringwaitwaitwait

Field Detail

exceptionInterceptorback to summary
protected ExceptionInterceptor exceptionInterceptor
pooledConnectionback to summary
protected MysqlPooledConnection pooledConnection
unwrappedInterfacesback to summary
protected Map<Class<?>, Object> unwrappedInterfaces

Constructor Detail

WrapperBaseback to summary
protected WrapperBase(MysqlPooledConnection pooledConnection)

Method Detail

checkAndFireConnectionErrorback to summary
protected void checkAndFireConnectionError(SQLException sqlEx) throws SQLException

Fires connection error event if required, before re-throwing exception

Parameters
sqlEx:SQLException

the SQLException that has occurred

Exceptions
SQLException:
(rethrown)
com.mysql.cj.jdbc back to summary

protected Class WrapperBase.ConnectionErrorFiringInvocationHandler

extends Object
implements InvocationHandler
Class Inheritance
  • java.lang.Object
  • com.mysql.cj.jdbc.WrapperBase.ConnectionErrorFiringInvocationHandler
All Implemented Interfaces
java.lang.reflect.InvocationHandler

Field Summary

Modifier and TypeField and Description
pack-priv Object

Constructor Summary

AccessConstructor and Description
public

Method Summary

Modifier and TypeMethod and Description
public Object
invoke(Object
the proxy instance that the method was invoked on
proxy
,
Method
the Method instance corresponding to the interface method invoked on the proxy instance. The declaring class of the Method object will be the interface that the method was declared in, which may be a superinterface of the proxy interface that the proxy class inherits the method through.
method
,
Object[]
an array of objects containing the values of the arguments passed in the method invocation on the proxy instance, or null if interface method takes no arguments. Arguments of primitive types are wrapped in instances of the appropriate primitive wrapper class, such as java.lang.Integer or java.lang.Boolean.
args
)

Implements java.lang.reflect.InvocationHandler.invoke.

Processes a method invocation on a proxy instance and returns the result.

private Object

Returns:

proxy object
proxyIfInterfaceIsJdbc
(Object
object to be proxied
toProxy
,
Class<?>
desired class
clazz
)

Recursively checks for interfaces on the given object to determine if it implements a java.sql interface, and if so, proxies the instance so that we can catch and fire SQL errors.

Inherited from java.lang.Object:
cloneequalsfinalizegetClasshashCodenotifynotifyAlltoStringwaitwaitwait

Field Detail

invokeOnback to summary
pack-priv Object invokeOn

Constructor Detail

ConnectionErrorFiringInvocationHandlerback to summary
public ConnectionErrorFiringInvocationHandler(Object toInvokeOn)

Method Detail

invokeback to summary
public Object invoke(Object proxy, Method method, Object[] args) throws Throwable

Implements java.lang.reflect.InvocationHandler.invoke.

Doc from java.lang.reflect.InvocationHandler.invoke.

Processes a method invocation on a proxy instance and returns the result. This method will be invoked on an invocation handler when a method is invoked on a proxy instance that it is associated with.

Parameters
proxy:Object

the proxy instance that the method was invoked on

method:Method

the Method instance corresponding to the interface method invoked on the proxy instance. The declaring class of the Method object will be the interface that the method was declared in, which may be a superinterface of the proxy interface that the proxy class inherits the method through.

args:Object[]

an array of objects containing the values of the arguments passed in the method invocation on the proxy instance, or null if interface method takes no arguments. Arguments of primitive types are wrapped in instances of the appropriate primitive wrapper class, such as java.lang.Integer or java.lang.Boolean.

Returns:Object

the value to return from the method invocation on the proxy instance. If the declared return type of the interface method is a primitive type, then the value returned by this method must be an instance of the corresponding primitive wrapper class; otherwise, it must be a type assignable to the declared return type. If the value returned by this method is null and the interface method's return type is primitive, then a NullPointerException will be thrown by the method invocation on the proxy instance. If the value returned by this method is otherwise not compatible with the interface method's declared return type as described above, a ClassCastException will be thrown by the method invocation on the proxy instance.

Annotations
@Override
Exceptions
Throwable:
the exception to throw from the method invocation on the proxy instance. The exception's type must be assignable either to any of the exception types declared in the throws clause of the interface method or to the unchecked exception types java.lang.RuntimeException or java.lang.Error. If a checked exception is thrown by this method that is not assignable to any of the exception types declared in the throws clause of the interface method, then an UndeclaredThrowableException containing the exception that was thrown by this method will be thrown by the method invocation on the proxy instance.
proxyIfInterfaceIsJdbcback to summary
private Object proxyIfInterfaceIsJdbc(Object toProxy, Class<?> clazz)

Recursively checks for interfaces on the given object to determine if it implements a java.sql interface, and if so, proxies the instance so that we can catch and fire SQL errors.

Parameters
toProxy:Object

object to be proxied

clazz:Class<?>

desired class

Returns:Object

proxy object