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A library for unit-tests to check the dependencies between classes.

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package de.spricom.dessert.util;

/*-
 * #%L
 * Dessert Dependency Assertion Library for Java
 * %%
 * Copyright (C) 2017 - 2023 Hans Jörg Heßmann
 * %%
 * 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.
 * #L%
 */

import java.util.HashSet;
import java.util.Set;

public final class Sets {
    private Sets() {
    }
    
    public static  boolean containsAny(Set s, Set t) {
        for (T v : t) {
            if (s.contains(v)) {
                return true;
            }
        }
        return false;
    }

    public static  boolean containsAll(Set s, Set t) {
        for (T v : t) {
            if (!s.contains(v)) {
                return false;
            }
        }
        return true;
    }

    public static  Set difference(Set s, Set t) {
        HashSet r = new HashSet(s);
        r.removeAll(t);
        return r;
    }

    public static  Set intersection(Set s, Set t) {
        HashSet r = new HashSet(s);
        r.retainAll(t);
        return r;
    }

    public static  Set union(Set s, Set t) {
        HashSet r = new HashSet(s);
        r.addAll(t);
        return r;
    }
}