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Apache Isis Commons is a library with utilities, that are shared with the entire Apache Isis ecosystem.

There is a newer version: 2.0.0-M9

/*
 *  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.isis.commons.collections;

import java.util.EnumSet;
import java.util.Iterator;
import java.util.stream.Stream;

/**
 * Immutable variant of {@link EnumSet}
 *
 * @since 2.0
 */
public final class ImmutableEnumSet>
implements Iterable, java.io.Serializable {

    private static final long serialVersionUID = 1L;

    private final EnumSet delegate;

    private ImmutableEnumSet(final EnumSet delegate) {
        this.delegate = delegate;
    }

    public static > ImmutableEnumSet from(final EnumSet delegate) {
        return new ImmutableEnumSet<>(delegate);
    }

    public static > ImmutableEnumSet noneOf(final Class enumType) {
        return from(EnumSet.noneOf(enumType));
    }

    public static > ImmutableEnumSet of(final E e1) {
        return from(EnumSet.of(e1));
    }

    public static > ImmutableEnumSet of(final E e1, final E e2) {
        return from(EnumSet.of(e1, e2));
    }

    public static > ImmutableEnumSet of(final E e1, final E e2, final E e3) {
        return from(EnumSet.of(e1, e2, e3));
    }

    public static > ImmutableEnumSet of(final E e1, final E e2, final E e3, final E e4) {
        return from(EnumSet.of(e1, e2, e3, e4));
    }

    public static > ImmutableEnumSet complementOf(final ImmutableEnumSet other) {
        return from(EnumSet.complementOf(other.delegate));
    }

    public static > ImmutableEnumSet allOf(final Class enumType) {
        return from(EnumSet.allOf(enumType));
    }

    public boolean contains(final E element) {
        return delegate.contains(element);
    }

    public EnumSet toEnumSet() {
        return delegate.clone();
    }

    @Override
    public Iterator iterator() {
        return delegate.iterator();
    }

    public Stream stream() {
        return delegate.stream();
    }

    public boolean isEmpty() {
        return delegate.isEmpty();
    }

}