Пример #1
0
  @Override
  public Pair<FeatureCollection, LinkedList<String>> getFeatures(
      final GetFeatureInfo fi, Style style) throws MissingDimensionValue, InvalidDimensionValue {

    try {
      final Pair<Filter, LinkedList<String>> dimFilter = getDimensionFilter(fi.getDimensions());

      final Envelope clickBox = fi.getClickBox();
      OperatorFilter filter = dimFilter == null ? null : (OperatorFilter) dimFilter.first;
      if (filter == null) {
        double scale =
            calcScaleWMS130(
                fi.getWidth(),
                fi.getHeight(),
                fi.getEnvelope(),
                fi.getCoordinateSystem(),
                DEFAULT_PIXEL_SIZE);
        filter = getStyleFilters(style, scale);
      } else {
        double scale =
            calcScaleWMS130(
                fi.getWidth(),
                fi.getHeight(),
                fi.getEnvelope(),
                fi.getCoordinateSystem(),
                DEFAULT_PIXEL_SIZE);
        OperatorFilter f = getStyleFilters(style, scale);
        if (f != null) {
          filter = new OperatorFilter(new And(filter.getOperator(), f.getOperator()));
        }
      }

      Set<Expression> exprs = new HashSet<Expression>();

      final ValueReference geomProp;

      exprs.addAll(Styles.getGeometryExpressions(style));

      if (exprs.size() == 1 && exprs.iterator().next() instanceof ValueReference) {
        geomProp = (ValueReference) exprs.iterator().next();
      } else {
        geomProp = null;
      }

      final Operator operator = filter == null ? null : filter.getOperator();

      QName featureType = style == null ? null : style.getFeatureType();

      LOG.debug("Querying the feature store(s)...");

      FeatureCollection col;
      if (featureType == null) {
        List<Query> queries =
            map(
                datastore.getSchema().getFeatureTypes(null, false, false),
                new Mapper<Query, FeatureType>() {
                  @Override
                  public Query apply(FeatureType u) {
                    return new Query(
                        u.getName(),
                        buildFilter(operator, u, clickBox, geomProp),
                        -1,
                        fi.getFeatureCount(),
                        -1);
                  }
                });
        clearNulls(queries);
        col = clearDuplicates(datastore.query(queries.toArray(new Query[queries.size()])));
      } else {
        FeatureType ft = datastore.getSchema().getFeatureType(featureType);
        Query query =
            new Query(
                featureType,
                buildFilter(operator, ft, clickBox, geomProp),
                -1,
                fi.getFeatureCount(),
                -1);
        col = clearDuplicates(datastore.query(query));
      }

      LOG.debug("Finished querying the feature store(s).");

      return new Pair<FeatureCollection, LinkedList<String>>(
          col, dimFilter == null ? new LinkedList<String>() : dimFilter.second);
    } catch (FilterEvaluationException e) {
      LOG.warn("A filter could not be evaluated. The error was '{}'.", e.getLocalizedMessage());
      LOG.trace("Stack trace:", e);
    } catch (FeatureStoreException e) {
      LOG.warn(
          "Data could not be fetched from the feature store. The error was '{}'.",
          e.getLocalizedMessage());
      LOG.trace("Stack trace:", e);
    }

    return new Pair<FeatureCollection, LinkedList<String>>(null, new LinkedList<String>());
  }
Пример #2
0
  @Override
  public LinkedList<String> paintMap(Graphics2D g, GetMap gm, Style style)
      throws MissingDimensionValue, InvalidDimensionValue {
    LinkedList<Query> queries = new LinkedList<Query>();
    LinkedList<String> warnings = collectQueries(style, gm, queries);

    Java2DRenderer renderer =
        new Java2DRenderer(
            g, gm.getWidth(), gm.getHeight(), gm.getBoundingBox(), gm.getPixelSize());
    Java2DTextRenderer textRenderer = new Java2DTextRenderer(renderer);

    // TODO
    @SuppressWarnings({"rawtypes", "unchecked"})
    XPathEvaluator<Feature> evaluator = (XPathEvaluator) new TypedObjectNodeXPathEvaluator();

    if (queries.isEmpty()) {
      LOG.warn("No queries were generated. Is the configuration correct?");
      return warnings;
    }

    FeatureInputStream rs = null;
    try {
      rs = datastore.query(queries.toArray(new Query[queries.size()]));
      // TODO Should this always be done on this level? What about min and maxFill values?
      rs = new ThreadedFeatureInputStream(rs, 100, 20);
      int max = gm.getRenderingOptions().getMaxFeatures(getName());
      int cnt = 0;
      double resolution = gm.getResolution();

      // TODO get rid of resolution handling on this code level completely
      // if ( !gm.getCoordinateSystem().equals( datastore.getStorageSRS() ) ) {
      // try {
      // Envelope b = new GeometryTransformer( datastore.getStorageSRS() ).transform(
      // gm.getBoundingBox() );
      // resolution = Utils.calcResolution( b, gm.getWidth(), gm.getHeight() );
      // } catch ( IllegalArgumentException e ) {
      // LOG.warn( "Calculating the resolution failed: '{}'", e.getLocalizedMessage() );
      // LOG.trace( "Stack trace:", e );
      // } catch ( TransformationException e ) {
      // LOG.warn( "Calculating the resolution failed: '{}'", e.getLocalizedMessage() );
      // LOG.trace( "Stack trace:", e );
      // } catch ( UnknownCRSException e ) {
      // LOG.warn( "Calculating the resolution failed: '{}'", e.getLocalizedMessage() );
      // LOG.trace( "Stack trace:", e );
      // }
      // }
      for (Feature f : rs) {
        try {
          render(f, evaluator, style, renderer, textRenderer, gm.getScale(), resolution);
        } catch (IllegalArgumentException e) {
          LOG.warn("Unable to render feature, probably a curve had multiple/non-linear segments.");
          LOG.warn("Error message was: {}", e.getLocalizedMessage());
          LOG.trace("Stack trace:", e);
        }
        if (max > 0 && ++cnt == max) {
          LOG.debug("Reached max features of {} for layer '{}', stopping.", max, this);
          break;
        }
      }
    } catch (FilterEvaluationException e) {
      LOG.warn("A filter could not be evaluated. The error was '{}'.", e.getLocalizedMessage());
      LOG.trace("Stack trace:", e);
    } catch (FeatureStoreException e) {
      LOG.warn(
          "Data could not be fetched from the feature store. The error was '{}'.",
          e.getLocalizedMessage());
      LOG.trace("Stack trace:", e);
    } finally {
      if (rs != null) {
        rs.close();
      }
    }
    return warnings;
  }