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/**
* Copyright (C) 2007 Google Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
*/
import java.util.Collections;
import java.util.HashSet;
import java.util.Set;
/**
* Helper methods related to {@link Set}s.
*
* @author maxr@google.com (Max Ross)
*/
public class Sets {
private Sets() {}
/**
* Construct a new {@link HashSet}, taking advantage of type inference to
* avoid specifying the type on the rhs.
*/
public static <E> HashSet<E> newHashSet() {
return new HashSet<E>();
}
/**
* Construct a new {@link HashSet} with the provided elements, taking advantage of type inference to
* avoid specifying the type on the rhs.
*/
public static <E> HashSet<E> newHashSet(E... elements) {
HashSet<E> set = newHashSet();
Collections.addAll(set, elements);
return set;
}
/**
* Construct a new {@link HashSet} with the contents of the provided {@link Iterable}, taking advantage of type inference to
* avoid specifying the type on the rhs.
*/
public static <E> HashSet<E> newHashSet(Iterable<? extends E> elements) {
HashSet<E> set = newHashSet();
for(E e : elements) {
set.add(e);
}
return set;
}
}
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