Examples of org.geotools.coverage.grid.io.AbstractGridCoverage2DReader

org.geotools.coverage.grid.io.AbstractGridCoverage2DReader
This class is a first attempt for providing a way to get more informations out of a single 2D raster datasets (x,y). It is worth to remark that for the moment this is thought for 2D rasters not for 3D or 4D rasters (x,y,z,t).
The main drawback I see with the current GeoApi GridCoverageReader interface is that there is no way to get real information about a raster source unless you instantiate a GridCoverage. As an instance it is impossible to know the envelope, the number of overviews, the tile size. This information is needed in order to perform decimation on reading or to use built-in overviews
This really impacts the ability to exploit raster datasets in a desktop environment where caching is crucial. @author Simone Giannecchini, GeoSolutions @since 2.3 @source $URL$

        //
        // Testing Direct read
        //
        // //


        final AbstractGridCoverage2DReader reader = new JP2KReader(file);
        final int nCov = reader.getGridCoverageCount();
        assertEquals(nCov, 1);
        
        final ParameterValue<GridGeometry2D> gg = JP2KFormat.READ_GRIDGEOMETRY2D.createValue();
        final ParameterValue<Boolean> useJAI = JP2KFormat.USE_JAI_IMAGEREAD.createValue();
        useJAI.setValue(false);
        final GeneralEnvelope oldEnvelope = reader.getOriginalEnvelope();
        checkReader(reader);
        gg.setValue(new GridGeometry2D(reader.getOriginalGridRange(), oldEnvelope));
        GridCoverage2D gc = (GridCoverage2D) reader.read(new GeneralParameterValue[] { gg, useJAI});
        assertNotNull(gc);
        forceDataLoading(gc);
        
        // //
        //
        // Testing simple imageRead
        //
        // //


        useJAI.setValue(true);
        final Envelope wgs84Envelope = CRS.transform(oldEnvelope, DefaultGeographicCRS.WGS84);
        gg.setValue(new GridGeometry2D(reader.getOriginalGridRange(), wgs84Envelope));
        gc = (GridCoverage2D) reader.read(new GeneralParameterValue[] {gg, useJAI});
        assertNotNull(gc);
        forceDataLoading(gc);
    }

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         }catch (FileNotFoundException fnfe){
             LOGGER.warning("test-data not found: sample.jp2 \nTests are skipped");
             return;
        }
         
    final AbstractGridCoverage2DReader reader = new JP2KReader(file);
    final GeneralEnvelope envelope = reader.getOriginalEnvelope();
    final Granule granule = new Granule(new ReferencedEnvelope(envelope), file);
    final Level level = granule.getLevel(0);
    if (level != null){
      final AffineTransform btl = level.getBaseToLevelTransform();
        assertTrue(btl.isIdentity());

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    ////
    //
    // MOSAIC_LOCATION_ATTRIBUTE
    //
    // error for location attribute
    AbstractGridCoverage2DReader reader=null;
    try {
        LOGGER.info("Testing Invalid location attribute. (A DataSourceException should be catched) ");
//      reader=(AbstractGridCoverage2DReader) new ImageMosaicReader(rgbURL, new Hints(Hints.MOSAIC_LOCATION_ATTRIBUTE, "aaaa")); 
              
      reader =         ((AbstractGridFormat) GridFormatFinder.findFormat(rgbURL,hints))
          .getReader(rgbURL, new Hints(Hints.MOSAIC_LOCATION_ATTRIBUTE, "aaaa"));
      Assert.assertNull(reader);
    } catch (Throwable e) {
      Assert.fail(e.getLocalizedMessage());
    }
//    try {
//      reader=(AbstractGridCoverage2DReader) ((AbstractGridFormat) GridFormatFinder.findFormat(rgbJarURL)).getReader(rgbJarURL, new Hints(Hints.MOSAIC_LOCATION_ATTRIBUTE, "aaaa"));
//      Assert.assertNull(reader);
//    } catch (Throwable e) {
//      Assert.fail(e.getLocalizedMessage());
//    }
    


    try {
      reader=(AbstractGridCoverage2DReader) ((AbstractGridFormat) GridFormatFinder.findFormat(rgbURL,hints)).getReader(rgbURL, new Hints(Hints.MOSAIC_LOCATION_ATTRIBUTE, "location"));
      Assert.assertNotNull(reader);
      reader.dispose();
      Assert.assertTrue(true);
    } catch (Throwable e) {
      Assert.fail(e.getLocalizedMessage());
    }


//    try {
//      reader=(AbstractGridCoverage2DReader) ((AbstractGridFormat) GridFormatFinder.findFormat(rgbJarURL)).getReader(rgbJarURL, new Hints(Hints.MOSAIC_LOCATION_ATTRIBUTE, "location"));
//      Assert.assertNotNull(reader);
//      reader.dispose();
//      Assert.assertTrue(true);
//    } catch (Throwable e) {
//      Assert.fail(e.getLocalizedMessage());
//    }


    ////
    //
    // MAX_ALLOWED_TILES
    //
    ////
    // error for num tiles
    try {
      reader=(AbstractGridCoverage2DReader) ((AbstractGridFormat) GridFormatFinder.findFormat(rgbURL)).getReader(rgbURL,new Hints(Hints.MAX_ALLOWED_TILES, Integer.valueOf(2)));
      Assert.assertNotNull(reader);
      
      //read the coverage
      @SuppressWarnings("unused")
      GridCoverage2D gc = (GridCoverage2D) reader.read(null);
      Assert.fail("MAX_ALLOWED_TILES was not respected");
    } catch (Throwable e) {


      if (reader != null) 
        reader.dispose();
      
      Assert.assertTrue(true);
    }


    try {
      reader=(AbstractGridCoverage2DReader) ((AbstractGridFormat) GridFormatFinder.findFormat(rgbURL)).getReader(rgbURL,new Hints(Hints.MAX_ALLOWED_TILES,Integer.valueOf(1000)));
      Assert.assertNotNull(reader);
      //read the coverage
      GridCoverage2D gc = (GridCoverage2D) reader.read(null);
      Assert.assertTrue(true);
      gc.dispose(true);
      reader.dispose();
    } catch (Exception e) {
      Assert.fail(e.getLocalizedMessage());
    }
  }

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       * STEP 1 Reading the coverage into memory in order to write it down
       * again
       * 
       */
      // get a reader
      AbstractGridCoverage2DReader reader = (AbstractGridCoverage2DReader) format
          .getReader(statURL);


      // get a grid coverage
      final ParameterValueGroup params = reader.getFormat().getReadParameters();
      params.parameter(
          AbstractGridFormat.READ_GRIDGEOMETRY2D.getName().toString()).setValue(
              new GridGeometry2D(new GridEnvelope2D(new Rectangle(0, 0, 640, 480)), reader.getOriginalEnvelope()));
      gc = ((GridCoverage2D) reader.read((GeneralParameterValue[]) params.values().toArray(new GeneralParameterValue[1])));
      assertTrue(CoverageUtilities.hasRenderingCategories(gc));
      if(TestData.isInteractiveTest())
      {
//         logging some info
        logger.info(gc.getCoordinateReferenceSystem2D().toWKT());

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    public void testFormatFinder() throws Exception {
        // get a gzipped ascii grid
        final File f = TestData.file(this, "arcgrid/arcGrid.asc");
        // Reading the coverage through a file
        AbstractGridFormat format = GridFormatFinder.findFormat(f);
        AbstractGridCoverage2DReader reader = format.getReader(f);


        GridCoverage2D gc = reader.read(null);


        assertNotNull(gc);


    }

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        Shell shell = new Shell(display);
        File openFile = JFileImageChooser.showOpenFile(shell);


        if (openFile != null && openFile.exists()) {
            AbstractGridFormat format = GridFormatFinder.findFormat(openFile);
            AbstractGridCoverage2DReader tiffReader = format.getReader(openFile);
            StyleFactoryImpl sf = new StyleFactoryImpl();
            RasterSymbolizer symbolizer = sf.getDefaultRasterSymbolizer();
            Style defaultStyle = SLD.wrapSymbolizers(symbolizer);


            MapContent mapContent = mapPane.getMapContent();

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    @Test
    public void testReadRUGGED_RD() throws Exception {
        tableName = "SDE.RASTER.RUGGED_RD";


        final AbstractGridCoverage2DReader reader = getReader();
        assertNotNull("Couldn't obtain a reader for " + tableName, reader);


        final GeneralEnvelope originalEnvelope = reader.getOriginalEnvelope();
        GridEnvelope originalGridRange = reader.getOriginalGridRange();


        final int reqWidth = originalGridRange.getSpan(0) / 8;
        final int reqHeight = originalGridRange.getSpan(1) / 8;


        Envelope reqEnvelope = originalEnvelope;

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    @Test
    public void testDescribe() throws Exception {
        tableName = "SDE.IMG_USGSQUADM";


        final AbstractGridCoverage2DReader reader = getReader();
        assertNotNull("Couldn't obtain a reader for " + tableName, reader);


        final GeneralEnvelope originalEnvelope = reader.getOriginalEnvelope();
        GridEnvelope originalGridRange = reader.getOriginalGridRange();
        LOGGER.info("original envelope  : " + originalEnvelope);
        LOGGER.info("original grid range: " + originalGridRange);


        int reqWidth = 294;
        int reqHeight = 184;

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    }


    @Test
    public void testReadRasterCatalogSubset() throws Exception {
        tableName = rasterTestData.loadRasterCatalog();
        final AbstractGridCoverage2DReader reader = getReader();
        assertNotNull("Couldn't obtain a reader for " + tableName, reader);


        final GeneralEnvelope originalEnvelope = reader.getOriginalEnvelope();
        final GridEnvelope originalGridRange = reader.getOriginalGridRange();


        final int reqWidth = originalGridRange.getSpan(0) / 2;
        final int reqHeight = originalGridRange.getSpan(1) / 2;


        GeneralEnvelope reqEnvelope = new GeneralEnvelope(

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    }


    @Test
    public void testReadRasterCatalog2() throws Exception {
        tableName = rasterTestData.loadRasterCatalog();
        final AbstractGridCoverage2DReader reader = getReader();
        assertNotNull("Couldn't obtain a reader for " + tableName, reader);


        final GeneralEnvelope originalEnvelope = reader.getOriginalEnvelope();
        final GridEnvelope originalGridRange = reader.getOriginalGridRange();


        final int reqWidth = originalGridRange.getSpan(0) / 10;
        final int reqHeight = originalGridRange.getSpan(1) / 10;


        GeneralEnvelope reqEnvelope = new GeneralEnvelope(

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