Package net.sf.jasperreports.engine.fill

Class JRGzipVirtualizer

java.lang.Object

net.sf.jasperreports.engine.fill.JRAbstractLRUVirtualizer

net.sf.jasperreports.engine.fill.JRGzipVirtualizer

All Implemented Interfaces:

JRVirtualizer

public class JRGzipVirtualizer
extends JRAbstractLRUVirtualizer

GZips the pages that it doesn't need, but keeps them in memory.

Author:

John Bindel

Nested Class Summary

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

JRAbstractLRUVirtualizer.Cache, JRAbstractLRUVirtualizer.CacheReference

Field Summary

Fields

Modifier and Type	Field	Description
static final String	EXCEPTION_MESSAGE_KEY_NO_DATA_FOUND

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

lastObjectMap, lastObjectRef, lastObjectSet, pagedIn, pagedOut, serializer

Constructor Summary

Constructors

Constructor	Description
JRGzipVirtualizer(int maxSize)

Method Summary

Modifier and Type	Method	Description
void	cleanup()	Called when we are done with the virtualizer and wish to cleanup any resources it has.
protected void	dispose(String virtualId)	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, contextChanged, deregisterObject, dispose, disposeAll, evict, finalize, isEvictable, isPagedOut, isPagedOutAndTouch, isReadOnly, isReadOnly, lastObject, 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

Field Details

EXCEPTION_MESSAGE_KEY_NO_DATA_FOUND

public static final String EXCEPTION_MESSAGE_KEY_NO_DATA_FOUND

See Also:

• Constant Field Values

Constructor Details

JRGzipVirtualizer

public JRGzipVirtualizer(int maxSize)

Parameters:

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

Method Details

dispose

protected void dispose(String virtualId)

Description copied from class: JRAbstractLRUVirtualizer

Removes the external data associated with a virtualizable object.

Specified by:

dispose in class JRAbstractLRUVirtualizer

Parameters:

virtualId - the ID of the virtualizable object

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

cleanup

public void cleanup()

Description copied from interface: JRVirtualizer

Called when we are done with the virtualizer and wish to cleanup any resources it has.