Examples of de.fuberlin.wiwiss.d2rq.map.DownloadMap

de.fuberlin.wiwiss.d2rq.map.DownloadMap
A d2rq:DownloadMap instance. This is a d2rq:ResourceMap that must produce URIs, can refer to a d2rq:ClassMap to provide further relation elements (joins, aliases, conditions), and additionally has a d2rq:mediaType and d2rq:contentColumn. Results can be retrieved via {@link #getContentDownloadColumn()}, {@link #getMediaTypeValueMaker()} (for the media type value make),{@link #nodeMaker()} (for the URI spec),and {@link #getRelation()}. @author RichardCyganiak

  public void testGenerateDownloadMap() {
    Mapping m = MappingHelper.readFromTestFile("parser/download-map.ttl");
    MappingHelper.connectToDummyDBs(m);
    Resource name = ResourceFactory.createResource("http://example.org/dm");
    assertTrue(m.downloadMapResources().contains(name));
    DownloadMap d = m.downloadMap(name);
    assertNotNull(d);
    assertEquals("image/png", 
        d.getMediaTypeValueMaker().makeValue(
            new ResultRow() {public String get(ProjectionSpec column) {return null;}}));
    assertEquals("People.pic", d.getContentDownloadColumn().qualifiedName());
    assertEquals("URI(Pattern(http://example.org/downloads/@@People.ID@@))", 
        d.nodeMaker().toString());
    assertEquals(
        new HashSet<ProjectionSpec>() {{ 
          add(SQL.parseAttribute("People.ID"));
          add(SQL.parseAttribute("People.pic"));
        }}, 
        d.getRelation().projections());
    assertTrue(d.getRelation().isUnique());
    assertTrue(d.getRelation().condition().isTrue());
    assertTrue(d.getRelation().joinConditions().isEmpty());
  }

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  private void parseDownloadMaps() {
    Iterator<Individual> it = this.model.listIndividuals(D2RQ.DownloadMap);
    while (it.hasNext()) {
      Resource downloadMapResource = it.next();
      DownloadMap downloadMap = new DownloadMap(downloadMapResource);
      parseResourceMap(downloadMap, downloadMapResource);
      parseDownloadMap(downloadMap, downloadMapResource);
      mapping.addDownloadMap(downloadMap);
    }
  }

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  }


  private boolean handleDownload(String resourceURI, HttpServletResponse response, D2RServer server) throws IOException {
    Mapping m = D2RServer.retrieveSystemLoader(getServletContext()).getMapping();
    for (Resource r: m.downloadMapResources()) {
      DownloadMap d = m.downloadMap(r);
      DownloadContentQuery q = new DownloadContentQuery(d, resourceURI);
      if (q.hasContent()) {
        response.setContentType(q.getMediaType() != null ? q.getMediaType() : "application/octet-stream");
        InputStream is = q.getContentStream();
        OutputStream os = response.getOutputStream();

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Related Classes of de.fuberlin.wiwiss.d2rq.map.DownloadMap

de.fuberlin.wiwiss.d2rq.parser.MapParser

de.fuberlin.wiwiss.d2rq.parser.ParserTest

de.fuberlin.wiwiss.d2rq.parser.RelationBuilder

de.fuberlin.wiwiss.d2rq.server.ResourceServlet

de.fuberlin.wiwiss.d2rq.values.ConstantValueMaker

de.fuberlin.wiwiss.d2rq.values.Pattern

de.fuberlin.wiwiss.d2rq.D2RQException

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