# Class ProxyConnection

java.lang.Object
org.apache.tomcat.jdbc.pool.JdbcInterceptor
org.apache.tomcat.jdbc.pool.ProxyConnection

All Implemented Interfaces:
  `InvocationHandler`

public class ProxyConnection extends JdbcInterceptor
A ProxyConnection object is the bottom most interceptor that wraps an object of type `PooledConnection`. The ProxyConnection intercepts three methods:

- `Connection.close()` - returns the connection to the pool. May be called multiple times.
- `Object.toString()` - returns a custom string for this object
- `PooledConnection.getConnection()` - returns the underlying connection

By default method comparisons is done on a String reference level, unless the `PoolConfiguration.setUseEquals(boolean)` has been called with a `true` argument.

- ## Field Summary

  Fields
  Modifier and Type
  Field
  Description
  `protected PooledConnection`
  `connection`
  `protected ConnectionPool`
  `pool`

  ### Fields inherited from class JdbcInterceptor

  `CLOSE_VAL, EQUALS_VAL, GETCONNECTION_VAL, HASHCODE_VAL, ISCLOSED_VAL, ISVALID_VAL, ISWRAPPERFOR_VAL, properties, TOSTRING_VAL, UNWRAP_VAL`

- ## Constructor Summary

  Constructors
  Modifier
  Constructor
  Description
  `protected`
  `ProxyConnection(ConnectionPool parent, PooledConnection con, boolean useEquals)`

- ## Method Summary

  Modifier and Type
  Method
  Description
  `PooledConnection`
  `getConnection()`
  `PooledConnection`
  `getDelegateConnection()`
  `ConnectionPool`
  `getParentPool()`
  `ConnectionPool`
  `getPool()`
  `Object`
  `invoke(Object proxy, Method method, Object[] args)`
  Gets invoked each time an operation on `Connection` is invoked.
  `boolean`
  `isClosed()`
  `boolean`
  `isWrapperFor(Class<?> iface)`
  `void`
  `reset(ConnectionPool parent, PooledConnection con)`
  Gets called each time the connection is borrowed from the pool This means that if an interceptor holds a reference to the connection the interceptor can be reused for another connection.
  `void`
  `setConnection(PooledConnection connection)`
  `void`
  `setPool(ConnectionPool pool)`
  `String`
  `toString()`
  `Object`
  `unwrap(Class<?> iface)`

  ### Methods inherited from class JdbcInterceptor

  `compare, compare, disconnected, getNext, getProperties, isUseEquals, poolClosed, poolStarted, setNext, setProperties, setUseEquals`

  ### Methods inherited from class Object

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

- ## Field Details

  - ### connection

    protected PooledConnection connection

  - ### pool

    protected ConnectionPool pool

- ## Constructor Details

  - ### ProxyConnection

    protected ProxyConnection(ConnectionPool parent, PooledConnection con, boolean useEquals)

- ## Method Details

  - ### getConnection

    public PooledConnection getConnection()

  - ### setConnection

    public void setConnection(PooledConnection connection)

  - ### getPool

    public ConnectionPool getPool()

  - ### setPool

    public void setPool(ConnectionPool pool)

  - ### reset

    public void reset(ConnectionPool parent, PooledConnection con)
    Description copied from class: `JdbcInterceptor`
    Gets called each time the connection is borrowed from the pool This means that if an interceptor holds a reference to the connection the interceptor can be reused for another connection.
    This method may be called with null as both arguments when we are closing down the connection.
    Specified by:
      `reset` in class `JdbcInterceptor`
    Parameters:
      `parent` - - the connection pool owning the connection
      `con` - - the pooled connection

  - ### isWrapperFor

    public boolean isWrapperFor(Class<?> iface)

  - ### unwrap

    public Object unwrap(Class<?> iface) throws SQLException
    Throws:
      `SQLException`

  - ### invoke

    public Object invoke(Object proxy, Method method, Object[] args) throws Throwable
    Description copied from class: `JdbcInterceptor`
    Gets invoked each time an operation on `Connection` is invoked.
    Specified by:
      `invoke` in interface `InvocationHandler`
    Overrides:
      `invoke` in class `JdbcInterceptor`
    Throws:
      `Throwable`

  - ### isClosed

    public boolean isClosed()

  - ### getDelegateConnection

    public PooledConnection getDelegateConnection()

  - ### getParentPool

    public ConnectionPool getParentPool()

  - ### toString

    public String toString()
    Overrides:
      `toString` in class `Object`