org.hibernate.engine.jdbc

Class ClobProxy

java.lang.Object

org.hibernate.engine.jdbc.ClobProxy

All Implemented Interfaces:

InvocationHandler

Direct Known Subclasses:

NClobProxy

public class ClobProxy
extends Object
implements InvocationHandler

Manages aspects of proxying Clobs for non-contextual creation, including proxy creation and handling proxy invocations. We use proxies here solely to avoid JDBC version incompatibilities.

Author:

Gavin King, Steve Ebersole, Gail Badner

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	ClobProxy(Reader reader, long length) Constructor used to build Clob from a reader.
protected	ClobProxy(String string) Constructor used to build Clob from string data.

Method Summary

Methods

Modifier and Type	Method and Description
static Clob	generateProxy(Reader reader, long length) Generates a Clob proxy using a character reader of given length.
static Clob	generateProxy(String string) Generates a Clob proxy using the string data.
protected InputStream	getAsciiStream()
protected Reader	getCharacterStream()
protected long	getLength()
protected static ClassLoader	getProxyClassLoader() Determines the appropriate class loader to which the generated proxy should be scoped.
protected String	getSubString(long start, int length)
protected CharacterStream	getUnderlyingStream()
Object	invoke(Object proxy, Method method, Object[] args)
protected void	resetIfNeeded()

Methods inherited from class java.lang.Object

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

Constructor Detail

ClobProxy

protected ClobProxy(String string)

Constructor used to build Clob from string data.

Parameters:

string - The byte array

See Also:

generateProxy(String)

ClobProxy

protected ClobProxy(Reader reader,
         long length)

Constructor used to build Clob from a reader.

Parameters:

reader - The character reader.

length - The length of the reader stream.

See Also:

generateProxy(java.io.Reader, long)

Method Detail

getLength

protected long getLength()

getAsciiStream

protected InputStream getAsciiStream()
                              throws SQLException

Throws:

SQLException

getCharacterStream

protected Reader getCharacterStream()
                             throws SQLException

Throws:

SQLException

getUnderlyingStream

protected CharacterStream getUnderlyingStream()
                                       throws SQLException

Throws:

SQLException

getSubString

protected String getSubString(long start,
                  int length)

invoke

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

Specified by:

invoke in interface InvocationHandler

Throws:

UnsupportedOperationException - if any methods other than Clob.length(), Clob.getAsciiStream(), Clob.getCharacterStream(), ClobImplementer.getUnderlyingStream(), Clob.getSubString(long, int), Clob.free(), or toString/equals/hashCode are invoked.

Throwable

resetIfNeeded

protected void resetIfNeeded()
                      throws SQLException

Throws:

SQLException

generateProxy

public static Clob generateProxy(String string)

Generates a Clob proxy using the string data.

Parameters:

string - The data to be wrapped as a Clob.

Returns:

The generated proxy.

generateProxy

public static Clob generateProxy(Reader reader,
                 long length)

Generates a Clob proxy using a character reader of given length.

Parameters:

reader - The character reader

length - The length of the character reader

Returns:

The generated proxy.

getProxyClassLoader

protected static ClassLoader getProxyClassLoader()

Determines the appropriate class loader to which the generated proxy should be scoped.

Returns:

The class loader appropriate for proxy construction.