/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.hadoop.util;
import java.util.ArrayList;
import java.util.List;
import java.util.Set;
/**
* A class of utility functions used by corona
*/
public class Utils {
/**
* Hiding the default constructor
*/
private Utils() {
}
/**
* Return a difference of the two sets as a list of objects
*
* @param <T> the type of the sets. Has to be the same for both sets
* @param s1 first set
* @param s2 second set
* @return the set difference of s1 and s2 as a list
*/
public static <T> List<T> setDifference(Set<T> s1, Set<T> s2) {
List<T> diff = new ArrayList<T>();
for (T one : s1) {
if (!s2.contains(one)) {
diff.add(one);
}
}
return diff;
}
}