jodd.util.CollectionUtil Maven / Gradle / Ivy
// Copyright (c) 2003-2010, Jodd Team (jodd.org). All Rights Reserved.
package jodd.util;
import jodd.util.collection.EnumerationIterator;
import java.util.ArrayList;
import java.util.Enumeration;
import java.util.HashSet;
import java.util.Iterator;
import java.util.List;
import java.util.Set;
/**
* Collection utilities.
*/
public class CollectionUtil {
/**
* Adapts an enumeration to an iterator.
*/
public static Iterator toIterator(Enumeration enumeration) {
return new EnumerationIterator(enumeration);
}
/**
* Iterate elements to a list.
* Returns an empty list if there are no elements to iterate.
*/
public static List iterateToList(Iterator iterator) {
List list = new ArrayList();
while (iterator.hasNext()) {
list.add(iterator.next());
}
return list;
}
/**
* Iterate elements to a set.
* Returns an empty set if there are no elements to iterate.
*/
public static Set iterateToSet(Iterator iterator) {
Set set = new HashSet();
while (iterator.hasNext()) {
set.add(iterator.next());
}
return set;
}
}