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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.microformats2;
    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  import org.apache.any23.extractor.html.EntityBasedMicroformatExtractor;
    28  import org.apache.any23.extractor.html.HTMLDocument;
    29
    30  import java.util.ArrayList;
    31
    32  /**
    33   * Extractor for the <a href="http://microformats.org/wiki/h-geo">h-geo</a> microformat.
    34   *
    35   * @author Nisala Nirmana
    36   */
    37  public class HGeoExtractor extends EntityBasedMicroformatExtractor {
    38
    39      private static final VCard vVCARD = VCard.getInstance();
    40
    41      private static final String[] geoFields = { "latitude", "longitude", "altitude" };
    42
    43      @Override
    44      public ExtractorDescription getDescription() {
    45          return HGeoExtractorFactory.getDescriptionInstance();
    46      }
    47
    48      protected String getBaseClassName() {
    49          return Microformats2Prefixes.CLASS_PREFIX + "geo";
    50      }
    51
    52      @Override
    53      protected void resetExtractor() {
    54          // Empty.
    55      }
    56
    57      protected boolean extractEntity(Node node, ExtractionResult out) {
    58          if (null == node)
    59              return false;
    60          final HTMLDocumentl/HTMLDocument.html#HTMLDocument">HTMLDocument document = new HTMLDocument(node);
    61          BNode geo = getBlankNodeFor(node);
    62          out.writeTriple(geo, RDF.TYPE, vVCARD.Location);
    63          final String extractorName = getDescription().getExtractorName();
    64          ArrayList<HTMLDocument.TextField> geoNodes = new ArrayList<HTMLDocument.TextField>();
    65          for (String field : geoFields) {
    66              geoNodes.add(document.getSingularTextField(Microformats2Prefixes.PROPERTY_PREFIX + field));
    67          }
    68          if (geoNodes.get(0).source() == null) {
    69              String[] composed = document.getSingularUrlField(Microformats2Prefixes.CLASS_PREFIX + "geo").value()
    70                      .split(";");
    71              for (int counter = 0; counter < composed.length; counter++) {
    72                  conditionallyAddStringProperty(
    73                          document.getSingularUrlField(Microformats2Prefixes.CLASS_PREFIX + "geo").source(), geo,
    74                          vVCARD.getProperty(geoFields[counter]), composed[counter]);
    75              }
    76          } else {
    77              for (int counter = 0; counter < geoNodes.size(); counter++) {
    78                  conditionallyAddStringProperty(geoNodes.get(counter).source(), geo,
    79                          vVCARD.getProperty(geoFields[counter]), geoNodes.get(counter).value());
    80              }
    81          }
    82          final TagSoupExtractionResult../org/apache/any23/extractor/TagSoupExtractionResult.html#TagSoupExtractionResult">TagSoupExtractionResult tser = (TagSoupExtractionResult) getCurrentExtractionResult();
    83          tser.addResourceRoot(document.getPathToLocalRoot(), geo, this.getClass());
    84          return true;
    85      }
    86
    87  }