/*
* Copyright 2015-present Facebook, Inc.
*
* Licensed 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 com.facebook.buck.util;
import com.google.common.collect.Sets;
import java.util.LinkedHashSet;
import java.util.Set;
public abstract class MoreSets {
/**
* Returns a new and mutable set containing the intersection of the two specified sets. Using the
* smaller of the two sets as the base for finding the intersection for performance reasons.
*/
public static <T> Set<T> intersection(Set<T> x, Set<T> y) {
Set<T> result = new LinkedHashSet<>();
if (x.size() > y.size()) {
Sets.intersection(y, x).copyInto(result);
} else {
Sets.intersection(x, y).copyInto(result);
}
return result;
}
}