org.hibernate.engine.jdbc

Class ClobProxy

java.lang.Object

org.hibernate.engine.jdbc.ClobProxy

All Implemented Interfaces:

java.lang.reflect.InvocationHandler

Direct Known Subclasses:

NClobProxy

public class ClobProxy
extends java.lang.Object
implements java.lang.reflect.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.

Constructor Summary

Constructors

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

Method Summary

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

Constructor used to build Clob from string data.

Parameters:

string - The byte array

See Also:

generateProxy(String)

ClobProxy

protected ClobProxy(java.io.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 java.io.InputStream getAsciiStream()
                                      throws java.sql.SQLException

Throws:

java.sql.SQLException

getCharacterStream

protected java.io.Reader getCharacterStream()
                                     throws java.sql.SQLException

Throws:

java.sql.SQLException

getUnderlyingStream

protected CharacterStream getUnderlyingStream()
                                       throws java.sql.SQLException

Throws:

java.sql.SQLException

getSubString

protected java.lang.String getSubString(long start,
                                        int length)

invoke

public java.lang.Object invoke(java.lang.Object proxy,
                               java.lang.reflect.Method method,
                               java.lang.Object[] args)
                        throws java.lang.Throwable

Specified by:

invoke in interface java.lang.reflect.InvocationHandler

Throws:

java.lang.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.

java.lang.Throwable

resetIfNeeded

protected void resetIfNeeded()
                      throws java.sql.SQLException

Throws:

java.sql.SQLException

generateProxy

public static java.sql.Clob generateProxy(java.lang.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 java.sql.Clob generateProxy(java.io.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 java.lang.ClassLoader getProxyClassLoader()

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

Returns:

The class loader appropriate for proxy construction.