org.openide.util.enum
Class FilterEnumeration

java.lang.Object
  |
  +--org.openide.util.enum.FilterEnumeration

All Implemented Interfaces:

Enumeration

Direct Known Subclasses:

RemoveDuplicatesEnumeration

public class FilterEnumeration

extends Object

implements Enumeration

Abstract class that takes an enumeration and filters its elements. To get this class fully work one must override accept method. Objects in the enumeration must not be null.

Constructor Summary

FilterEnumeration(Enumeration en)

Method Summary

protected boolean	accept(Object o) Filters objects.
boolean	hasMoreElements()
Object	nextElement()

Methods inherited from class java.lang.Object

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

Constructor Detail

FilterEnumeration

public FilterEnumeration(Enumeration en)

Parameters:

en - enumeration to filter

Method Detail

accept

protected boolean accept(Object o)

Filters objects. Overwrite this to decide which objects should be included in enumeration and which not.

Default implementation accepts all non-null objects

Parameters:

o - the object to decide on

Returns:

true if it should be in enumeration and false if it should not

hasMoreElements

public boolean hasMoreElements()

Specified by:

hasMoreElements in interface Enumeration

Returns:

true if there is more elements in the enumeration

nextElement

public Object nextElement()

Specified by:

nextElement in interface Enumeration

Returns:

next object in the enumeration

Throws:

NoSuchElementException - can be thrown if there is no next object in the enumeration