de.dhke.projects.cutil.collections.iterator.MultiMapPairIterable.java Source code

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Here is the source code for de.dhke.projects.cutil.collections.iterator.MultiMapPairIterable.java

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/**
 * (c) 2009-2014 Peter Wullinger
 *
 * $Id$
 *
 * Use, modification and restribution of this file are covered by the
 * terms of the Artistic License 2.0.
 *
 * You should have received a copy of the license terms in a file named
 * "LICENSE" together with this software package.
 *
 * Disclaimer of Warranty: THE PACKAGE IS PROVIDED BY THE COPYRIGHT
 * HOLDER AND CONTRIBUTORS "AS IS' AND WITHOUT ANY EXPRESS OR IMPLIED
 * WARRANTIES. THE IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR
 * A PARTICULAR PURPOSE, OR NON-INFRINGEMENT ARE DISCLAIMED TO THE
 * EXTENT PERMITTED BY YOUR LOCAL LAW. UNLESS REQUIRED BY LAW, NO
 * COPYRIGHT HOLDER OR CONTRIBUTOR WILL BE LIABLE FOR ANY DIRECT,
 * INDIRECT, INCIDENTAL, OR CONSEQUENTIAL DAMAGES ARISING IN ANY WAY OUT
 * OF THE USE OF THE PACKAGE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
 * DAMAGE.
 **/
package de.dhke.projects.cutil.collections.iterator;

import de.dhke.projects.cutil.Pair;
import java.util.Collection;
import java.util.Iterator;
import java.util.Map;
import org.apache.commons.collections15.MultiMap;

/**
 *
 * @author Peter Wullinger <peter.wullinger@uni-bamberg.de>
 */
public class MultiMapPairIterable<K, V> implements Iterable<Pair<K, V>> {
    private final Iterable<Map.Entry<K, V>> _baseIterable;

    protected MultiMapPairIterable(final MultiMap<K, V> baseMap) {
        _baseIterable = MultiMapEntryIterable.decorate(baseMap);
    }

    protected MultiMapPairIterable(final Iterable<Map.Entry<K, Collection<V>>> baseIterable) {
        _baseIterable = MultiMapEntryIterable.decorate(baseIterable);
    }

    public static <K, V> MultiMapPairIterable<K, V> decorate(final MultiMap<K, V> baseMap) {
        return new MultiMapPairIterable<>(baseMap.entrySet());
    }

    public static <K, V> MultiMapPairIterable<K, V> decorate(
            final Iterable<Map.Entry<K, Collection<V>>> baseIterable) {
        return new MultiMapPairIterable<>(baseIterable);
    }

    @Override
    public Iterator<Pair<K, V>> iterator() {
        return MultiMapPairIterator.decorate(_baseIterable.iterator());
    }
}