Examples of ucar.nc2.iosp.IOServiceProvider

ucar.nc2.ncml.NcMLGWriter
This is the service provider interface for the low-level I/O access classes (read only). This is only used by service implementors. The NetcdfFile class manages all registered IOServiceProvider classes. When NetcdfFile.open() is called:
1. the file is opened as a ucar.unidata.io.RandomAccessFile;
2. the file is handed to the isValidFile() method of each registered IOServiceProvider class (until one returns true, which means it can read the file).
3. the open() method on the resulting IOServiceProvider class is handed the file.

   */
  public static NetcdfFile openInMemory(String name, byte[] data, String iospClassName) throws IOException, ClassNotFoundException, IllegalAccessException, InstantiationException {


    ucar.unidata.io.InMemoryRandomAccessFile raf = new ucar.unidata.io.InMemoryRandomAccessFile(name, data);
    Class iospClass = NetcdfFile.class.getClassLoader().loadClass(iospClassName);
    IOServiceProvider spi = (IOServiceProvider) iospClass.newInstance();


    return new NetcdfFile(spi, raf, name, null);
  }

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  }


  private static NetcdfFile open(ucar.unidata.io.RandomAccessFile raf, String location, ucar.nc2.util.CancelTask cancelTask,
                                 Object iospMessage) throws IOException {


    IOServiceProvider spi = null;
    if (debugSPI) System.out.println("NetcdfFile try to open = " + location);


    // avoid opening file more than once, so pass around the raf.
    if (N3header.isValidFile(raf)) {
      spi = SPFactory.getServiceProvider();


      //} else if (H5header.isValidFile(raf)) {
      // spi = new ucar.nc2.iosp.hdf5.H5iosp();


    } else {
      // look for registered providers
      for (IOServiceProvider registeredSpi : registeredProviders) {
        if (debugSPI) System.out.println(" try iosp = " + registeredSpi.getClass().getName());


        if (registeredSpi.isValidFile(raf)) {
          // need a new instance for thread safety
          Class c = registeredSpi.getClass();
          try {
            spi = (IOServiceProvider) c.newInstance();
          } catch (InstantiationException e) {
            throw new IOException("IOServiceProvider " + c.getName() + "must have no-arg constructor."); // shouldnt happen
          } catch (IllegalAccessException e) {
            throw new IOException("IOServiceProvider " + c.getName() + " IllegalAccessException: " + e.getMessage()); // shouldnt happen
          }
          break;
        }
      }
    }


    if (spi == null) {
      raf.close();
      throw new IOException("Cant read " + location + ": not a valid CDM file.");
    }


    // send before iosp is opened
    if (iospMessage != null)
      spi.sendIospMessage(iospMessage);


    if (log.isDebugEnabled())
      log.debug("Using IOSP " + spi.getClass().getName());


    NetcdfFile result = new NetcdfFile(spi, raf, location, cancelTask);


    // send after iosp is opened
    if (iospMessage != null)
      spi.sendIospMessage(iospMessage);


    return result;
  }

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  // all the work is here, so can be called recursively
  private Array readData(ucar.nc2.Variable v2, long dataPos, int[] origin, int[] shape, int[] stride) throws IOException, InvalidRangeException {


    // long length = myRaf.length();
    myRaf.seek(dataPos);
    Vinfo vi = (Vinfo) v2.getSPobject();
    int data_size = vi.vsize;
    byte[] data = new byte[data_size];
    myRaf.read(data);


    Array array = null;

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    raf.seek(pos);


    // gini header process
    byte[] buf = new byte[FY_AWX_PIB_LEN];
    int count = raf.read(buf);
    EndianByteBuffer byteBuffer = null;
    if (count == FY_AWX_PIB_LEN) {
      byteBuffer = new EndianByteBuffer(buf);


      this.firstHeader.fillHeader(byteBuffer);


      // if big endian bytes, fill the head with BIG_ENDIAN instead;
      if (this.firstHeader.byteOrder != EndianByteBuffer.LITTLE_ENDIAN) {
        byteBuffer = new EndianByteBuffer(buf, EndianByteBuffer.BIG_ENDIAN);
      }


    } else {
      return false;
    }


    if (!((this.firstHeader.fileName.endsWith(".AWX") || this.firstHeader.fileName.endsWith(".awx"))
            && this.firstHeader.firstHeaderLength == FY_AWX_PIB_LEN)) {
      return false;
    }


    // skip the fills of the first record
    //  raf.seek(FY_AWX_PIB_LEN + this.firstHeader.fillSectionLength);
    buf = new byte[this.firstHeader.secondHeaderLength];
    raf.read(buf);
    byteBuffer = new EndianByteBuffer(buf, this.firstHeader.byteOrder);
    switch (this.firstHeader.typeOfProduct) {
      case AwxFileFirstHeader.AWX_PRODUCT_TYPE_UNDEFINED:
        throw new UnsupportedDatasetException();
      case AwxFileFirstHeader.AWX_PRODUCT_TYPE_GEOSAT_IMAGE:
        secondHeader = new AwxFileGeoSatelliteSecondHeader();

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    Array array = null;
    if (vi.classType == DataType.BYTE.getPrimitiveClassType()) {


      array = Array.factory(DataType.BYTE.getPrimitiveClassType(), v2.getShape(), data);
    } else if (vi.classType == DataType.SHORT.getPrimitiveClassType()) {
      EndianByteBuffer byteBuff = new EndianByteBuffer(data, vi.byteOrder);
      short[] sdata = byteBuff.getShortArray();
      //for(int i=0; i<sdata.length; i++){
      //  System.out.println(sdata[i]);
      //}
      array = Array.factory(DataType.SHORT.getPrimitiveClassType(), v2.getShape(), sdata);
    } else if (vi.classType == DataType.INT.getPrimitiveClassType()) {
      EndianByteBuffer byteBuff = new EndianByteBuffer(data, vi.byteOrder);
      short[] idata = byteBuff.getShortArray();
      array = Array.factory(DataType.INT.getPrimitiveClassType(), v2.getShape(), idata);


    } else {
      throw new UnsupportedEncodingException();
    }

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    saveEdition = attr.get("grid_edition").equals("2") ? 2 : 1;
    version = Float.parseFloat(attr.get("index_version"));
    GridTableLookup lookup = (saveEdition == 2) ? getLookup2() : getLookup1();


    // make it into netcdf objects
    GridIndexToNC convert = new GridIndexToNC(raf);
    convert.open(index, lookup, saveEdition, ncfile, fmrcCoordSys, cancelTask);
    ncfile.finish();


    // may want to save index for debugging
    if (GridServiceProvider.debugOpen)
      gridIndexSave = index;

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  protected void open(GridIndex index, CancelTask cancelTask) throws IOException {
    long start = System.currentTimeMillis();
    GridTableLookup lookup = (saveEdition == 2) ? getLookup2() : getLookup1();


    // make it into netcdf objects
    GridIndexToNC convert = new GridIndexToNC(index.filename);
    convert.open(index, lookup, saveEdition, ncfile, fmrcCoordSys, cancelTask);


    ncfile.finish();


    if (debugTiming) {
      long took = System.currentTimeMillis() - start;

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    private ucar.unidata.io.RandomAccessFile myRaf;
    // private Nidsheader.Vinfo myInfo;
    protected UFheader headerParser;


    public boolean isValidFile(ucar.unidata.io.RandomAccessFile raf) {
        UFheader localHeader = new UFheader();
        return (localHeader.isValidFile(raf));
    }

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    public void open(ucar.unidata.io.RandomAccessFile raf, ucar.nc2.NetcdfFile file,
                   ucar.nc2.util.CancelTask cancelTask) throws IOException {
        ncfile = file;
        myRaf = raf;


        headerParser = new UFheader();
        headerParser.read(myRaf, ncfile);
        //myInfo = headerParser.getVarInfo();
        HashMap variables = headerParser.variableGroup;


        Set vSet = variables.keySet();

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   * @param showCoords shoe the values of coordinate axes
   * @param uri        use this for the uri attribute; if null use getLocation().
   * @throws IOException on write error
   */
  public void writeNcMLG(java.io.OutputStream os, boolean showCoords, String uri) throws IOException {
    new NcMLGWriter().writeXML(this, os, showCoords, uri);
  }

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