it.tidalwave.bluebill.taxonomy.spi.DefaultTaxonomyTraverser Maven / Gradle / Ivy

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/***********************************************************************************************************************
 *
 * blueBill Core - open source birding
 * Copyright (C) 2009-2011 by Tidalwave s.a.s. (http://www.tidalwave.it)
 *
 ***********************************************************************************************************************
 *
 * 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.
 *
 ***********************************************************************************************************************
 *
 * WWW: http://bluebill.tidalwave.it
 * SCM: https://java.net/hg/bluebill~core-src
 *
 **********************************************************************************************************************/
package it.tidalwave.bluebill.taxonomy.spi;

import javax.annotation.Nonnull;
import it.tidalwave.bluebill.taxonomy.Taxon;
import it.tidalwave.bluebill.taxonomy.Taxonomy;
import it.tidalwave.bluebill.taxonomy.TaxonomyTraverser;
import it.tidalwave.bluebill.taxonomy.TaxonomyVisitor;

/***********************************************************************************************************************
 * 
 * A default implementation of {@link TaxonomyTraverser}.
 * 
 * @author  Fabrizio Giudici
 * @version $Id$
 *
 **********************************************************************************************************************/
public final class DefaultTaxonomyTraverser implements TaxonomyTraverser
  {
    @Nonnull
    private final Taxonomy taxonomy;

    public DefaultTaxonomyTraverser (final @Nonnull Taxonomy taxonomy)
      {
        this.taxonomy = taxonomy;
      }

    public void accept (final @Nonnull TaxonomyVisitor visitor)
      {
        accept(taxonomy.getTopTaxon(), visitor);
      }

    public void accept (final @Nonnull Taxon taxon, final @Nonnull TaxonomyVisitor visitor)
      {
        visitor.preVisit(taxon);
        visitor.visit(taxon);

        for (final Taxon subTaxon : taxon.findSubTaxa().results())
          {
            accept(subTaxon, visitor);
          }

        visitor.postVisit(taxon);
      }
  }