Examples of IOServiceProvider

ucar.nc2.iosp.IOServiceProvider
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.

Examples of ucar.nc2.iosp.IOServiceProvider

   * @throws IllegalAccessException if class is not accessible.
   * @throws InstantiationException if class doesnt have a no-arg constructor.
   * @throws ClassCastException     if class doesnt implement IOServiceProvider interface.
   */
  static public void registerIOProvider(Class iospClass) throws IllegalAccessException, InstantiationException {
    IOServiceProvider spi;
    spi = (IOServiceProvider) iospClass.newInstance(); // fail fast


    if (userLoads) registeredProviders.add(0, spi);  // put user stuff first
    else registeredProviders.add(spi);
  }

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Examples of ucar.nc2.iosp.IOServiceProvider

   */
  static public NetcdfFile open(String location, String iospClassName, int bufferSize, CancelTask cancelTask, Object iospMessage)
          throws ClassNotFoundException, IllegalAccessException, InstantiationException, IOException {


    Class iospClass = NetcdfFile.class.getClassLoader().loadClass(iospClassName);
    IOServiceProvider spi = (IOServiceProvider) iospClass.newInstance(); // fail fast


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


    // get rid of file prefix, if any
    String uriString = location.trim();
    if (uriString.startsWith("file://"))
      uriString = uriString.substring(7);
    else if (uriString.startsWith("file:"))
      uriString = uriString.substring(5);


    // get rid of crappy microsnot \ replace with happy /
    uriString = StringUtil.replace(uriString, '\\', "/");


    if (bufferSize <= 0)
      bufferSize = default_buffersize;
    ucar.unidata.io.RandomAccessFile raf = new ucar.unidata.io.RandomAccessFile(uriString, "r", bufferSize);


    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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Examples of ucar.nc2.iosp.IOServiceProvider

   */
  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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Examples of ucar.nc2.iosp.IOServiceProvider

  }


  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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