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

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Here is the source code for org.thiesen.collections.set.impl.AbstractDelegatingImmutableSet.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.util.Collection;
import java.util.Set;

import org.thiesen.collections.collection.impl.Collections3;
import org.thiesen.collections.common.iterator.ImmutableIterator;
import org.thiesen.collections.common.iterator.ImmutableIteratorImpl;
import org.thiesen.collections.common.view.set.ImmutableSetView;
import org.thiesen.collections.set.IImmutableSet;
import org.thiesen.collections.set.views.IImmutableSetView;

import com.google.common.base.Predicate;
import com.google.common.collect.Iterables;
import com.google.common.collect.Sets;

abstract class AbstractDelegatingImmutableSet<E> implements IImmutableSet<E> {

    private final Set<E> _set;

    public AbstractDelegatingImmutableSet(final Set<E> set) {
        _set = set;
    }

    AbstractDelegatingImmutableSet() {
        _set = null;
        // for deserialization
    }

    @Override
    public boolean contains(final Object arg0) {
        return _set.contains(arg0);
    }

    public boolean containsAll(final Collection<?> arg0) {
        return _set.containsAll(arg0);
    }

    @Override
    public boolean isEmpty() {
        return _set.isEmpty();
    }

    @Override
    public boolean isNotEmpty() {
        return !isEmpty();
    }

    @Override
    public ImmutableIterator<E> iterator() {
        return ImmutableIteratorImpl.wrap(_set.iterator());
    }

    @Override
    public int size() {
        return _set.size();
    }

    @Override
    public Object[] toArray() {
        return _set.toArray();
    }

    @Override
    public <T> T[] toArray(final T[] arg0) {
        return _set.toArray(arg0);
    }

    @Override
    public boolean containsAll(final Iterable<?> i) {
        return Collections3.containsAll(_set, i);
    }

    @Override
    public String toString() {
        return _set.toString();
    }

    @Override
    public ImmutableSetView<E> asCollectionsView() {
        return SetViews.asImmutableSetView(_set);
    }

    @Override
    public Set<E> copyToMutableCollections() {
        return Sets.newHashSet(_set);
    }

    @Override
    public IImmutableSetView<E> filter(final Predicate<E> predicate) {
        return SetViews.asIImmutableSetView(Sets.filter(_set, predicate));
    }

    @Override
    public boolean hasSingleValueOnly() {
        return Iterables.size(_set) == 1;
    }

    @Override
    public E getSingleValue() {
        return Iterables.getOnlyElement(_set);
    }

}