org.gephi.graph.api

Interface ColumnObserver

public interface ColumnObserver

Observer over a column to monitor changes in the attributes values.

Column observer can be used to periodically monitor changes made to a column. This scenario is common is multi-threaded applications where a thread is responsible to take action when something has changed in the column's data.

Column observer users should periodically call the hasColumnChanged() method to check the status. Each call resets the observer so if the method returns true and the table doesn't change after that it will return false next time.

This observer monitors all the rows for this column and consider something has changed when an element's value for this column has been changed.

Observers should be destroyed when not needed anymore. A new observer can be obtained from the Column.

See Also:

Column

Method Summary

Modifier and Type	Method and Description
void	destroy() Destroys this observer.
Column	getColumn() Gets the column this observer belongs to.
boolean	hasColumnChanged() Returns true if the column has changed.
boolean	isDestroyed() Returns true if this observer has been destroyed.

Method Detail

hasColumnChanged

boolean hasColumnChanged()

Returns true if the column has changed.

Returns:

true if changed, false otherwise

getColumn

Column getColumn()

Gets the column this observer belongs to.

Returns:

the table

destroy

void destroy()

Destroys this observer.

isDestroyed

boolean isDestroyed()

Returns true if this observer has been destroyed.

Returns:

true if destroyed, false otherwise