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Add selectRejected methods, from BluePhelix@web.de (Peter) 

git-svn-id: https://svn.apache.org/repos/asf/jakarta/commons/proper/collections/trunk@130880 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Stephen Colebourne 2002-11-24 21:11:27 +00:00
parent 607a1f8418
commit aa139cebf0
1 changed files with 40 additions and 4 deletions
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44
src/java/org/apache/commons/collections/CollectionUtils.java
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@ -1,7 +1,7 @@
/*
* $Id: CollectionUtils.java,v 1.20 2002/11/24 16:23:21 scolebourne Exp $
* $Revision: 1.20 $
* $Date: 2002/11/24 16:23:21 $
* $Id: CollectionUtils.java,v 1.21 2002/11/24 21:11:27 scolebourne Exp $
* $Revision: 1.21 $
* $Date: 2002/11/24 21:11:27 $
*
* ====================================================================
*
@ -83,7 +83,8 @@ import org.apache.commons.collections.iterators.EnumerationIterator;
* @author Stephen Colebourne
* @author Steve Downey
* @author <a href="herve.quiroz@esil.univ-mrs.fr">Herve Quiroz</a>
* @version $Revision: 1.20 $ $Date: 2002/11/24 16:23:21 $
* @author BluePhelix@web.de (Peter)
* @version $Revision: 1.21 $ $Date: 2002/11/24 21:11:27 $
*/
public class CollectionUtils {
@ -463,6 +464,41 @@ public class CollectionUtils {
}
}
/**
* Selects all elements from inputCollection which don't match the given predicate
* into an output collection
*
* @param inputCollection the collection to get the input from, may not be null
* @param predicate the predicate to use, may be null
* @return the elements <b>not</b> matching the predicate (new list)
* @throws NullPointerException if the input collection is null
*/
public static Collection selectRejected(Collection inputCollection, Predicate predicate) {
ArrayList answer = new ArrayList(inputCollection.size());
selectRejected(inputCollection, predicate, answer);
return answer;
}
/**
* Selects all elements from inputCollection which don't match the given predicate
* and adds them to outputCollection
*
* @param inputCollection the collection to get the input from, may be null
* @param predicate the predicate to use, may be null
* @param outputCollection the collection to output into, may not be null
* @return the outputCollection with the the elements <b>not</b> matching the predicate added
* @throws NullPointerException if the input collection is null
*/
public static void selectRejected(Collection inputCollection, Predicate predicate, Collection outputCollection) {
if (inputCollection != null && predicate != null) {
for (Iterator iter = inputCollection.iterator(); iter.hasNext();) {
Object item = iter.next();
if (predicate.evaluate(item) == false) {
outputCollection.add(item);
}
}
}
}
/**
* Transforms all elements from inputCollection with the given transformer
* and adds them to the outputCollection.