org.activemath.webapp.clip
Class ClipsStorage

java.lang.Object
  org.activemath.webapp.clip.ClipsStorage

public class ClipsStorage
extends Object

Singleton to archive the contents of clips.

Field Summary

protected static boolean	DEBUG
static String	DEFAULT_OMOBJ
protected static org.apache.commons.logging.Log	log

Method Summary

String	createClipCoordinate(AppSession session, String omobj)
String	createClipCoordinate(String omobj) Deprecated. please provide an appsession
String	createClipCoordinate(String exerciseId, AppSession session, String omobj) Allocates a coordinate that can be referenced for copy-and-paste to work.
void	deleteAllClips(List<String> coords)
static OJElement	extractOpenMathClip(MBaseRef mbaseRef, String coord)
protected void	finalize()
String	getClipOpenMathFromStorage(String clipCoordinate)
static ClipsStorage	getInstance()
long	getLastModified(String coord)
long	getLastRead(String coord)
static void	main(String[] args)
void	putOmobjAtClip(String clipCoordinate, String omobj)
void	removeClip(String clipCoordinate)
void	seedCoordinatesIntoOmobjs(org.jdom.Element elt, AppSession appSession, String exerciseId)

Methods inherited from class java.lang.Object

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

Field Detail

log

protected static org.apache.commons.logging.Log log

DEBUG

protected static final boolean DEBUG

DEFAULT_OMOBJ

public static final String DEFAULT_OMOBJ

See Also:

Constant Field Values

Method Detail

getInstance

public static ClipsStorage getInstance()

deleteAllClips

public void deleteAllClips(List<String> coords)

createClipCoordinate

public String createClipCoordinate(String omobj)

Deprecated. please provide an appsession

createClipCoordinate

public String createClipCoordinate(AppSession session,
                                   String omobj)

createClipCoordinate

public String createClipCoordinate(String exerciseId,
                                   AppSession session,
                                   String omobj)

Allocates a coordinate that can be referenced for copy-and-paste to work.

Parameters:

omobj - the OpenMath object to be stored, should be an XML document

session - the AppSession to bind this to, so that the clip is at least destroyed when the session goes down

exerciseId - the ID of the currently running exercise, could be null; having it non-null ensures that the clips allocated for this exercise are erased when the exercise is finished.

Returns:

a string coordinate clipCoord so that the content is accessible using simple GET from /ActiveMath2/clip/clip.cmd?coordinate=clipCoord

putOmobjAtClip

public void putOmobjAtClip(String clipCoordinate,
                           String omobj)

getClipOpenMathFromStorage

public String getClipOpenMathFromStorage(String clipCoordinate)

removeClip

public void removeClip(String clipCoordinate)

getLastModified

public long getLastModified(String coord)

getLastRead

public long getLastRead(String coord)

finalize

protected void finalize()

Overrides:

finalize in class Object

extractOpenMathClip

public static OJElement extractOpenMathClip(MBaseRef mbaseRef,
                                            String coord)

seedCoordinatesIntoOmobjs

public void seedCoordinatesIntoOmobjs(org.jdom.Element elt,
                                      AppSession appSession,
                                      String exerciseId)

main

public static void main(String[] args)
                 throws Exception

Throws:

Exception