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

Source Cross Reference Class Diagram Java Document (Java Doc)

org.apache.commons.collections.set .PredicatedSet

org.apache.commons.collections.set .PredicatedSortedSet

PredicatedSortedSet

public class PredicatedSortedSet extends PredicatedSet implements SortedSet(Code)

Decorates another SortedSet to validate that all additions match a specified predicate.

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

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

SortedSet set = PredicatedSortedSet.decorate(new TreeSet(), 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	PredicatedSortedSet(SortedSet set, Predicate predicate) Constructor that wraps (not copies).

Method Summary
public Comparator	comparator()
public static SortedSet	decorate(SortedSet set, Predicate predicate) Factory method to create a predicated (validating) sorted set.
public Object	first()
public SortedSet	headSet(Object toElement)
public Object	last()
public SortedSet	subSet(Object fromElement, Object toElement)
public SortedSet	tailSet(Object fromElement)

Constructor Detail

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

Method Detail

comparator
public Comparator comparator()(Code)

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

first
public Object first()(Code)

headSet
public SortedSet headSet(Object toElement)(Code)

last
public Object last()(Code)

subSet
public SortedSet subSet(Object fromElement, Object toElement)(Code)

tailSet
public SortedSet tailSet(Object fromElement)(Code)

Methods inherited from org.apache.commons.collections.set.PredicatedSet

public static Set decorate(Set set, Predicate predicate)(Code)(Java Doc)
protected Set getSet()(Code)(Java Doc)

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