myfaces _DeltaList
------------------
Key: MYFACES-3227
URL: https://issues.apache.org/jira/browse/MYFACES-3227
Project: MyFaces Core
Issue Type: Wish
Components: General
Affects Versions: 2.1.1
Environment: tomcat 7.0.14 myfaces 2.1.1
Reporter: lkw
Priority: Minor
hi
at first, i'm not native english speaker.
let's see follow MyFaces's _DeltaList's code.
...
===
public boolean retainAll(Collection<?> c)
{
return _delegate.retainAll(c);
}
===
follow is java.util.List's retainAll method javadoc.
===
/**
* Retains only the elements in this list that are contained in the
* specified collection (optional operation). In other words, removes
* from this list all the elements that are not contained in the specified
* collection.
*
* @param c collection containing elements to be retained in this list
* @return <tt>true</tt> if this list changed as a result of the call
* @throws UnsupportedOperationException if the <tt>retainAll</tt> operation
* is not supported by this list
* @throws ClassCastException if the class of an element of this list
* is incompatible with the specified collection (optional)
* @throws NullPointerException if this list contains a null element and the
* specified collection does not permit null elements (optional),
* or if the specified collection is null
* @see #remove(Object)
* @see #contains(Object)
*/
boolean retainAll(Collection<?> c);
===
so
===
List<Integer> thisList = new ArrayList<Integer>();
thisList.add(1);
thisList.add(2);
thisList.add(3);
List<Integer> paramList = new ArrayList<Integer>();
paramList.add(2);
paramList.add(3);
paramList.add(4);
thisList.retainAll(paramList);
for(Integer i:thisList)
System.out.println(i);
==
result is 2,3.
i think that _DeltaList.retainAll should have clearInitialState() method call
as follow.
===
public boolean retainAll(Collection<?> c)
{
boolean result = _delegate.retainAll(c);
if (result==true)
clearInitialState();
return result;
}
===
of course, i know that calling to this method is not so many frequency.
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