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Java Source Code / Java Documentation » Library » Apache common Collections » org.apache.commons.collections.bag

Source Cross Reference Class Diagram Java Document (Java Doc)

org.apache.commons.collections.bag .PredicatedBag

org.apache.commons.collections.bag .PredicatedSortedBag

PredicatedSortedBag

public class PredicatedSortedBag extends PredicatedBag implements SortedBag(Code)

Decorates another SortedBag to validate that additions match a specified predicate.

This bag exists to provide validation for the decorated bag. It is normally created to decorate an empty bag. If an object cannot be added to the bag, an IllegalArgumentException is thrown.

One usage would be to ensure that no null entries are added to the bag.

SortedBag bag = PredicatedSortedBag.decorate(new TreeBag(), NotNullPredicate.INSTANCE);

This class is Serializable from Commons Collections 3.1.
since:
   Commons Collections 3.0
version:
   $Revision: 155406 $ $Date: 2005-02-26 12:55:26 +0000 (Sat, 26 Feb 2005) $
author:
   Stephen Colebourne
author:
   Paul Jack

Constructor Summary
protected	PredicatedSortedBag(SortedBag bag, Predicate predicate) Constructor that wraps (not copies).

Method Summary
public Comparator	comparator()
public static SortedBag	decorate(SortedBag bag, Predicate predicate) Factory method to create a predicated (validating) bag.
public Object	first()
protected SortedBag	getSortedBag() Gets the decorated sorted bag.
public Object	last()

Constructor Detail

PredicatedSortedBag
protected PredicatedSortedBag(SortedBag bag, Predicate predicate)(Code)
	Constructor that wraps (not copies). If there are any elements already in the bag being decorated, they are validated. Parameters: bag - the bag to decorate, must not be null Parameters: predicate - the predicate to use for validation, must not be null throws: IllegalArgumentException - if bag or predicate is null throws: IllegalArgumentException - if the bag contains invalid elements

Method Detail

comparator
public Comparator comparator()(Code)

decorate
public static SortedBag decorate(SortedBag bag, Predicate predicate)(Code)
	Factory method to create a predicated (validating) bag. If there are any elements already in the bag being decorated, they are validated. Parameters: bag - the bag to decorate, must not be null Parameters: predicate - the predicate to use for validation, must not be null a new predicated SortedBag throws: IllegalArgumentException - if bag or predicate is null throws: IllegalArgumentException - if the bag contains invalid elements

first
public Object first()(Code)

getSortedBag
protected SortedBag getSortedBag()(Code)
	Gets the decorated sorted bag. the decorated bag

last
public Object last()(Code)

Methods inherited from org.apache.commons.collections.bag.PredicatedBag

public boolean add(Object object, int count)(Code)(Java Doc)
public static Bag decorate(Bag bag, Predicate predicate)(Code)(Java Doc)
protected Bag getBag()(Code)(Java Doc)
public int getCount(Object object)(Code)(Java Doc)
public boolean remove(Object object, int count)(Code)(Java Doc)
public Set uniqueSet()(Code)(Java Doc)

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