org.thiesen.collections.set.impl.ImmutableSet.java Source code

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Here is the source code for org.thiesen.collections.set.impl.ImmutableSet.java

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/*
 *  This file is part of Thiesen Collections.
 *  
 *  Copyright (c) 2010 by Marcus Thiesen (marcus@thiesen.org)
 *
 *  Thiesen Collections is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU Lesser General Public License as published by
 *  the Free Software Foundation, either version 3 of the License, or
 *  (at your option) any later version.
 *
 *  Thiesen Collections is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU Lesser General Public License for more details.
 *
 *  You should have received a copy of the GNU Lesser General Public License
 *  along with Thiesen Collections.  If not, see <http://www.gnu.org/licenses/>.
 */
package org.thiesen.collections.set.impl;

import java.io.Serializable;
import java.util.Collections;

import org.thiesen.collections.set.IMutableSet;

import com.google.common.collect.Iterables;

public class ImmutableSet<E> extends AbstractDelegatingImmutableSet<E> implements Serializable {

    private static final long serialVersionUID = -3874566868408234997L;

    private final com.google.common.collect.ImmutableSet<E> _immutableSet;

    private ImmutableSet(final com.google.common.collect.ImmutableSet<E> set) {
        super(set);
        _immutableSet = set;
    }

    public static <T> ImmutableSet<T> copyOf(final Iterable<T> elements) {
        if (elements instanceof ImmutableSet<?>) {
            return (ImmutableSet<T>) elements;
        }

        return new ImmutableSet<T>(com.google.common.collect.ImmutableSet.copyOf(elements));
    }

    public static <T> ImmutableSet<T> of(final T... elements) {
        return new ImmutableSet<T>(com.google.common.collect.ImmutableSet.of(elements));
    }

    @Override
    public IMutableSet<E> mutableCopy() {
        return MutableHashSet.copyOf(_immutableSet);
    }

    @Override
    public ImmutableSet<E> append(final E value) {
        return copyOf(Iterables.concat(this, Collections.singleton(value)));
    }

}