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

Source Cross Reference Class Diagram Java Document (Java Doc)

org.apache.commons.collections.collection .PredicatedCollection

org.apache.commons.collections.list .PredicatedList

PredicatedList

public class PredicatedList extends PredicatedCollection implements List(Code)

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

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

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

List list = PredicatedList.decorate(new ArrayList(), 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

Inner Class :protected class PredicatedListIterator extends AbstractListIteratorDecorator

Constructor Summary
protected	PredicatedList(List list, Predicate predicate) Constructor that wraps (not copies).

Method Summary
public void	add(int index, Object object)
public boolean	addAll(int index, Collection coll)
public static List	decorate(List list, Predicate predicate) Factory method to create a predicated (validating) list.
public Object	get(int index)
protected List	getList() Gets the list being decorated.
public int	indexOf(Object object)
public int	lastIndexOf(Object object)
public ListIterator	listIterator()
public ListIterator	listIterator(int i)
public Object	remove(int index)
public Object	set(int index, Object object)
public List	subList(int fromIndex, int toIndex)

Constructor Detail

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

Method Detail

add
public void add(int index, Object object)(Code)

addAll
public boolean addAll(int index, Collection coll)(Code)

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

get
public Object get(int index)(Code)

getList
protected List getList()(Code)
	Gets the list being decorated. the decorated list

indexOf
public int indexOf(Object object)(Code)

lastIndexOf
public int lastIndexOf(Object object)(Code)

listIterator
public ListIterator listIterator()(Code)

listIterator
public ListIterator listIterator(int i)(Code)

remove
public Object remove(int index)(Code)

set
public Object set(int index, Object object)(Code)

subList
public List subList(int fromIndex, int toIndex)(Code)

Fields inherited from org.apache.commons.collections.collection.PredicatedCollection

final protected Predicate predicate(Code)(Java Doc)

Methods inherited from org.apache.commons.collections.collection.PredicatedCollection

public boolean add(Object object)(Code)(Java Doc)
public boolean addAll(Collection coll)(Code)(Java Doc)
public static Collection decorate(Collection coll, Predicate predicate)(Code)(Java Doc)
protected void validate(Object object)(Code)(Java Doc)

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