ucar.nc2.ft.point.remote.PointCollectionStreamRemote Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of org.gecko.ucar.netcdf Show documentation

Re-packaged Unidata netCDF

The newest version!

package ucar.nc2.ft.point.remote;

import java.io.IOException;
import java.io.InputStream;
import ucar.nc2.ft.PointFeatureCollection;
import ucar.nc2.stream.CdmRemote;
import ucar.nc2.time.CalendarDateRange;
import ucar.nc2.time.CalendarDateUnit;
import ucar.unidata.geoloc.LatLonRect;

/**
 * Creates a {@link ucar.nc2.ft.PointFeatureCollection} by reading point stream data from a CDM Remote endpoint.
 *
 * @author cwardgar
 * @since 2014/10/02
 */
public class PointCollectionStreamRemote extends PointCollectionStreamAbstract implements QueryMaker {
  private final String uri;
  private final QueryMaker queryMaker;
  LatLonRect filter_bb;
  CalendarDateRange filter_date;

  public PointCollectionStreamRemote(String uri, CalendarDateUnit timeUnit, String altUnits, QueryMaker queryMaker) {
    super(uri, timeUnit, altUnits);
    this.uri = uri;
    this.queryMaker = (queryMaker == null) ? this : queryMaker;
  }

  @Override
  public String makeQuery() {
    // LOOK: This is probably broken as of 2015/09/29.
    return PointDatasetRemote.makeQuery(null, filter_bb, filter_date); // default query
  }

  @Override
  public InputStream getInputStream() throws IOException {
    return CdmRemote.sendQuery(null, uri, queryMaker.makeQuery());
  }

  // Must override default subsetting implementation for efficiency.

  @Override
  public PointFeatureCollection subset(LatLonRect boundingBox, CalendarDateRange dateRange) {
    return new Subset(this, boundingBox, dateRange);
  }

  private static class Subset extends PointCollectionStreamRemote {
    LatLonRect filter_bb;
    CalendarDateRange filter_date;

    Subset(PointCollectionStreamRemote from, LatLonRect filter_bb, CalendarDateRange filter_date) {
      // Passing null to the queryMaker param causes the default query to be used.
      // The default query will use the boundingBox and dateRange we calculate below.
      super(from.uri, from.getTimeUnit(), from.getAltUnits(), null);

      this.filter_bb = filter_bb;
      this.filter_date = filter_date;
    }
  }
}