org.openbase.jul.pattern

Class AbstractFilter<T>

java.lang.Object

org.openbase.jul.pattern.AbstractFilter<T>

Type Parameters:

T - the type of object on which the filter works

All Implemented Interfaces:

Filter<T>, ListFilter<T>

Direct Known Subclasses:

MockUpFilter

public abstract class AbstractFilter<T>
extends Object
implements ListFilter<T>

Filter which decides for a list of objects which to keep and which to filter out.

Author:

Tamino Huxohl

Constructor Summary

Constructors

Constructor and Description
AbstractFilter()

Method Summary

Modifier and Type	Method and Description
abstract void	addObserver(Observer observer) A filter can depend on some other processes.
abstract void	beforeFilter() This method is called once before the filtering is applied.
List<T>	filter(List<T> list) Deprecated. ATTENTION: is not really deprecated just for compatibility reasons, will be not deprecated in release 2.0
abstract void	removeObserver(Observer observer) Remove an observer which is added by addObserver.

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.openbase.jul.pattern.Filter

filter, verify

Constructor Detail

AbstractFilter

public AbstractFilter()

Method Detail

filter

public List<T> filter(List<T> list)
               throws CouldNotPerformException

Deprecated. ATTENTION: is not really deprecated just for compatibility reasons, will be not deprecated in release 2.0

Filter object from the list for which the verification fails.

Specified by:

filter in interface Filter<T>

Specified by:

filter in interface ListFilter<T>

Parameters:

list - the list which is filtered

Returns:

a filtered list

Throws:

CouldNotPerformException - if an error occurs while filtering

beforeFilter

public abstract void beforeFilter()
                           throws CouldNotPerformException

This method is called once before the filtering is applied.

Throws:

CouldNotPerformException - if an error occurs.

addObserver

public abstract void addObserver(Observer observer)

A filter can depend on some other processes. To be notified when the filter will change an observer can be registered.

Parameters:

observer - An observer which is notified when the filter changes.

removeObserver

public abstract void removeObserver(Observer observer)

Remove an observer which is added by addObserver.

Parameters:

observer - The observer to be removed.