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/*
 * Copyright 2013 Samppa Saarela
 *
 * 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 org.javersion.util;

import java.util.Collection;
import java.util.Set;
import java.util.Spliterator;
import java.util.stream.Stream;
import java.util.stream.StreamSupport;

import javax.annotation.concurrent.Immutable;

// TODO: More methods...
@Immutable
public interface PersistentSet extends Iterable {

    Set asSet();

    PersistentSet conj(E element);

    PersistentSet conjAll(Collection elements);

    boolean contains(Object o);

    PersistentSet disj(Object element);

    MutableSet toMutableSet();

    int size();

    Spliterator spliterator();

    default Stream stream() {
        return StreamSupport.stream(spliterator(), false);
    }

    default Stream parallelStream() {
        return StreamSupport.stream(spliterator(), true);
    }

}