net.sf.jasperreports.engine.fill

Class JRSwapFileVirtualizer

java.lang.Object

net.sf.jasperreports.engine.fill.JRAbstractLRUVirtualizer

net.sf.jasperreports.engine.fill.JRSwapFileVirtualizer

All Implemented Interfaces:

JRVirtualizer

public class JRSwapFileVirtualizer
extends JRAbstractLRUVirtualizer

A virtualizer that uses a single swap file to serialize virtual data.

Version:

$Id: JRSwapFileVirtualizer.java 5180 2012-03-29 13:23:12Z teodord $

Author:

Lucian Chirita (lucianc@users.sourceforge.net)

Nested Class Summary

Nested classes/interfaces inherited from class net.sf.jasperreports.engine.fill.JRAbstractLRUVirtualizer

JRAbstractLRUVirtualizer.Cache, JRAbstractLRUVirtualizer.CacheReference, JRAbstractLRUVirtualizer.ClassLoaderAnnotationObjectInputStream, JRAbstractLRUVirtualizer.ClassLoaderAnnotationObjectOutputStream

Field Summary

Fields inherited from class net.sf.jasperreports.engine.fill.JRAbstractLRUVirtualizer

CLASSLOADER_IDX_NOT_SET, classLoadersIndexes, classLoadersList, lastObject, lastObjectMap, lastObjectSet

Constructor Summary

Constructors

Constructor and Description
JRSwapFileVirtualizer(int maxSize, JRSwapFile swap) Creates a virtualizer that uses a swap file.
JRSwapFileVirtualizer(int maxSize, JRSwapFile swap, boolean swapOwner) Creates a virtualizer that uses a swap file.

Method Summary

Methods

Modifier and Type	Method and Description
void	cleanup() Disposes the swap file used if this virtualizer owns it.
protected void	dispose(String id) Removes the external data associated with a virtualizable object.
protected void	pageIn(JRVirtualizable o) Reads a virtualizable object's data from an external storage.
protected void	pageOut(JRVirtualizable o) Writes a virtualizable object's data to an external storage.

Methods inherited from class net.sf.jasperreports.engine.fill.JRAbstractLRUVirtualizer

clearData, deregisterObject, disposeAll, evict, finalize, isAncestorClassLoader, isEvictable, isPagedOut, isPagedOutAndTouch, isReadOnly, isReadOnly, readData, registerObject, requestData, reset, setLastObject, setReadOnly, touch, virtualizeData, writeData

Methods inherited from class java.lang.Object

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

Constructor Detail

JRSwapFileVirtualizer

public JRSwapFileVirtualizer(int maxSize,
                     JRSwapFile swap)

Creates a virtualizer that uses a swap file.

The virtualizer will be considered the owner of the swap file.

Parameters:

maxSize - the maximum size (in JRVirtualizable objects) of the paged in cache.

swap - the swap file to use for data virtualization

JRSwapFileVirtualizer

public JRSwapFileVirtualizer(int maxSize,
                     JRSwapFile swap,
                     boolean swapOwner)

Creates a virtualizer that uses a swap file.

Parameters:

maxSize - the maximum size (in JRVirtualizable objects) of the paged in cache.

swap - the swap file to use for data virtualization

swapOwner - whether the virtualizer is the owner (single user) of the swap file. If true, the virtualizer will dispose the swap file on cleanup.

Method Detail

pageOut

protected void pageOut(JRVirtualizable o)
                throws IOException

Description copied from class: JRAbstractLRUVirtualizer

Writes a virtualizable object's data to an external storage.

Specified by:

pageOut in class JRAbstractLRUVirtualizer

Parameters:

o - a virtualizable object

Throws:

IOException

pageIn

protected void pageIn(JRVirtualizable o)
               throws IOException

Description copied from class: JRAbstractLRUVirtualizer

Reads a virtualizable object's data from an external storage.

Specified by:

pageIn in class JRAbstractLRUVirtualizer

Parameters:

o - a virtualizable object

Throws:

IOException

dispose

protected void dispose(String id)

Description copied from class: JRAbstractLRUVirtualizer

Removes the external data associated with a virtualizable object.

Specified by:

dispose in class JRAbstractLRUVirtualizer

Parameters:

id - the ID of the virtualizable object

cleanup

public void cleanup()

Disposes the swap file used if this virtualizer owns it.

See Also:

JRSwapFileVirtualizer(int, JRSwapFile, boolean)