Package org.eclipse.core.resources

Interface ISavedState

public interface ISavedState

A data structure returned by IWorkspace.addSaveParticipant(org.eclipse.core.runtime.Plugin, ISaveParticipant) containing a save number and an optional resource delta.

See Also:

• IWorkspace.addSaveParticipant(org.eclipse.core.runtime.Plugin, ISaveParticipant)

Restriction:

This interface is not intended to be implemented by clients.

Restriction:

This interface is not intended to be extended by clients.

Method Summary

Modifier and Type	Method	Description
IPath[]	getFiles()	Returns the files mapped with the ISaveContext.map(IPath, IPath) facility.
int	getSaveNumber()	Returns the save number for the save participant.
IPath	lookup(IPath file)	Returns the mapped location associated with the given path or null if none.
void	processResourceChangeEvents(IResourceChangeListener listener)	Used to receive notification of changes that might have happened while this plug-in was not active.

Method Details

getFiles

IPath[] getFiles()

Returns the files mapped with the ISaveContext.map(IPath, IPath) facility. Returns an empty array if there are no mapped files.

Returns:

the files currently mapped by the participant

See Also:

• lookup(IPath)
• ISaveContext.map(IPath, IPath)

getSaveNumber

int getSaveNumber()

Returns the save number for the save participant. This is the save number of the last successful save in which the plug-in actively participated, or 0 if the plug-in has never actively participated in a successful save.

Returns:

the save number

lookup

IPath lookup(IPath file)

Returns the mapped location associated with the given path or null if none.

Returns:

the mapped location of a given path

See Also:

• getFiles()
• ISaveContext.map(IPath, IPath)

processResourceChangeEvents

void processResourceChangeEvents(IResourceChangeListener listener)

Used to receive notification of changes that might have happened while this plug-in was not active. The listener receives notifications of changes to the workspace resource tree since the time this state was saved. After this method is run, the delta is forgotten. Subsequent calls to this method will have no effect.

No notification is received in the following cases:

• if a saved state was never recorded (ISaveContext.needDelta() was not called)
• a saved state has since been forgotten (using IWorkspace.forgetSavedTree(String))
• a saved state has been deemed too old or has become invalid

All clients should have a contingency plan in place in case a changes are not available (the case should be very similar to the first time a plug-in is activated, and only has the current state of the workspace to work from).

The supplied event is of type IResourceChangeEvent.POST_BUILD and contains the delta detailing changes since this plug-in last participated in a save. This event object (and the resource delta within it) is valid only for the duration of the invocation of this method.

Parameters:

listener - the listener

See Also:

• ISaveContext.needDelta()
• IResourceChangeListener