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

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Here is the source code for org.thiesen.collections.set.impl.ImmutableSortedSet.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 java.util.Comparator;

import org.thiesen.collections.common.view.set.ImmutableSortedSetView;
import org.thiesen.collections.set.IImmutableSortedSet;
import org.thiesen.collections.set.IMutableSortedSet;
import org.thiesen.collections.set.views.IImmutableSortedSetView;

import com.google.common.collect.Iterables;

public class ImmutableSortedSet<E> extends AbstractDelegatingImmutableSet<E>
        implements IImmutableSortedSet<E>, Serializable {

    private static final long serialVersionUID = 4270687233661901815L;
    private final com.google.common.collect.ImmutableSortedSet<E> _sortedSet;

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

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

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

    public static <T> ImmutableSortedSet<T> copyOf(final Comparator<? super T> comparator,
            final Iterable<T> elements) {
        return new ImmutableSortedSet<T>(com.google.common.collect.ImmutableSortedSet.copyOf(comparator, elements));
    }

    @Override
    public IMutableSortedSet<E> mutableCopy() {
        return MutableTreeSet.<E>copyOf(_sortedSet.comparator(), _sortedSet);
    }

    @Override
    public IImmutableSortedSetView<E> headSet(final E toElement) {
        return SetViews.asIImmutableSortedSetView(_sortedSet.headSet(toElement));
    }

    @Override
    public IImmutableSortedSetView<E> subSet(final E fromElement, final E toElement) {
        return SetViews.asIImmutableSortedSetView(_sortedSet.subSet(fromElement, toElement));
    }

    @Override
    public IImmutableSortedSetView<E> tailSet(final E fromElement) {
        return SetViews.asIImmutableSortedSetView(_sortedSet.tailSet(fromElement));
    }

    @Override
    public Comparator<? super E> comparator() {
        return _sortedSet.comparator();
    }

    @Override
    public E first() {
        return _sortedSet.first();
    }

    @Override
    public E last() {
        return _sortedSet.last();
    }

    @Override
    public ImmutableSortedSetView<E> asCollectionsView() {
        return SetViews.asImmutableSortedSetView(_sortedSet);
    }

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