Java Doc for JRVirtualizer.java in  » Report » jasperreports-2.0.1 » net » sf » jasperreports » engine » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Report » jasperreports 2.0.1 » net.sf.jasperreports.engine 
Source Cross Reference  Class Diagram Java Document (Java Doc) 


net.sf.jasperreports.engine.JRVirtualizer

All known Subclasses:   net.sf.jasperreports.engine.fill.JRAbstractLRUVirtualizer,
JRVirtualizer
public interface JRVirtualizer (Code)

author:
   John Bindel
version:
   $Id: JRVirtualizer.java 1254 2006-05-15 08:57:30Z lucianc $
See Also:   net.sf.jasperreports.engine.JRVirtualizationHelper




Method Summary
 voidcleanup()
     Called when we are done with the virtualizer and wish to cleanup any resources it has.
 voidclearData(JRVirtualizable o)
     Called when the virtual object paged-out data should be freed.
 voidderegisterObject(JRVirtualizable o)
     Lets this virtualizer know that it no longer must track the object.
 voidregisterObject(JRVirtualizable o)
     Lets this virtualizer know that it must track the object.

All virtualizable object must register with their virtualizer upon construction.

 voidrequestData(JRVirtualizable o)
     Called when the virtual object must be paged-in.
 voidtouch(JRVirtualizable o)
     Lets the virtualizer know that this object is still being used.
 voidvirtualizeData(JRVirtualizable o)
     Called when the virtual object should be paged-out.



Method Detail
cleanup
void cleanup()(Code)
Called when we are done with the virtualizer and wish to cleanup any resources it has.



clearData
void clearData(JRVirtualizable o)(Code)
Called when the virtual object paged-out data should be freed.

If the object's virtual data is not paged-out, the object will only be JRVirtualizer.touch(JRVirtualizable) touched .




deregisterObject
void deregisterObject(JRVirtualizable o)(Code)
Lets this virtualizer know that it no longer must track the object.



registerObject
void registerObject(JRVirtualizable o)(Code)
Lets this virtualizer know that it must track the object.

All virtualizable object must register with their virtualizer upon construction.




requestData
void requestData(JRVirtualizable o)(Code)
Called when the virtual object must be paged-in.

If the object's virtual data is not paged-out, the object will only be JRVirtualizer.touch(JRVirtualizable) touched .




touch
void touch(JRVirtualizable o)(Code)
Lets the virtualizer know that this object is still being used. This should be called to help the virtualizer determine which objects to keep in its cache, and which objects to page-out when it must do some paging-out.

The virtualizer gets to decide what type of caching strategy it will use.




virtualizeData
void virtualizeData(JRVirtualizable o)(Code)
Called when the virtual object should be paged-out.



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