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    1   /*
    2    * Licensed to the Apache Software Foundation (ASF) under one or more
    3    * contributor license agreements.  See the NOTICE file distributed with
    4    * this work for additional information regarding copyright ownership.
    5    * The ASF licenses this file to You under the Apache License, Version 2.0
    6    * (the "License"); you may not use this file except in compliance with
    7    * the License.  You may obtain a copy of the License at
    8    *
    9    *  http://www.apache.org/licenses/LICENSE-2.0
    10   *
    11   * Unless required by applicable law or agreed to in writing, software
    12   * distributed under the License is distributed on an "AS IS" BASIS,
    13   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    14   * See the License for the specific language governing permissions and
    15   * limitations under the License.
    16   */
    17
    18  package org.apache.any23.extractor.html;
    19
    20  import org.apache.any23.extractor.ExtractionResult;
    21  import org.apache.any23.extractor.ExtractorDescription;
    22  import org.apache.any23.extractor.TagSoupExtractionResult;
    23  import org.apache.any23.vocab.VCard;
    24  import org.eclipse.rdf4j.model.BNode;
    25  import org.eclipse.rdf4j.model.vocabulary.RDF;
    26  import org.w3c.dom.Node;
    27
    28  /**
    29   * Extractor for the <a href="http://microformats.org/wiki/geo">Geo</a> microformat.
    30   *
    31   * @author Gabriele Renzi
    32   */
    33  public class GeoExtractor extends EntityBasedMicroformatExtractor {
    34
    35      private static final VCard vVCARD = VCard.getInstance();
    36
    37      @Override
    38      public ExtractorDescription getDescription() {
    39          return GeoExtractorFactory.getDescriptionInstance();
    40      }
    41
    42      protected String getBaseClassName() {
    43          return "geo";
    44      }
    45
    46      @Override
    47      protected void resetExtractor() {
    48          // Empty.
    49      }
    50
    51      protected boolean extractEntity(Node node, ExtractionResult out) {
    52          if (null == node)
    53              return false;
    54          // try lat & lon
    55          final HTMLDocumentTMLDocument.html#HTMLDocument">HTMLDocument document = new HTMLDocument(node);
    56          HTMLDocument.TextField latNode = document.getSingularTextField("latitude");
    57          HTMLDocument.TextField lonNode = document.getSingularTextField("longitude");
    58          String lat = latNode.value();
    59          String lon = lonNode.value();
    60          if ("".equals(lat) || "".equals(lon)) {
    61              String[] both = document.getSingularUrlField("geo").value().split(";");
    62              if (both.length != 2)
    63                  return false;
    64              lat = both[0];
    65              lon = both[1];
    66          }
    67          BNode geo = getBlankNodeFor(node);
    68          out.writeTriple(geo, RDF.TYPE, vVCARD.Location);
    69          conditionallyAddStringProperty(latNode.source(), geo, vVCARD.latitude, lat);
    70          conditionallyAddStringProperty(lonNode.source(), geo, vVCARD.longitude, lon);
    71
    72          final TagSoupExtractionResultorg/apache/any23/extractor/TagSoupExtractionResult.html#TagSoupExtractionResult">TagSoupExtractionResult tser = (TagSoupExtractionResult) getCurrentExtractionResult();
    73          tser.addResourceRoot(document.getPathToLocalRoot(), geo, this.getClass());
    74
    75          return true;
    76      }
    77
    78  }