How to use

get

method

in

javax.jnlp.PersistenceService

@Override
public InputStream openInputFile(String fileName) throws IOException {
  checkBasics("openInputFile");
  URL fileURL = fileNameToURL(fileName);
  try {
    return new BufferedInputStream(ps.get(fileURL).getInputStream());
  } catch (Exception e) {
    throw new IOException("openInputFile \"" + fileName + "\" failed", e);
  }
}

/**
 * Get the current value for this muffin.
 * @param strParam The key for this muffin parameter.
 * @return The value for this muffin (null if none).
 */
public String getMuffin(String strParam)
{
  try   {
    URL url = new URL(m_strCodeBase + strParam);
    FileContents fc = m_ps.get(url);
    if (fc == null)
      return null;
    // read in the contents of a muffin
    byte[] buf = new byte[(int)fc.getLength()];
    InputStream is = fc.getInputStream();
    int pos = 0;
    while((pos = is.read(buf, pos, buf.length - pos)) > 0) {
      // just loop
    }
    is.close();
    String strValue = new String(buf, ENCODING);
    return strValue;
  } catch (Exception ex)  {
    // Return null for any exception
  }
  return null;
}
/**

@Override
public OutputStream openOutputFile(String fileName, boolean append) throws IOException {
  checkBasics("openOutputFile");
  URL fileURL = fileNameToURL(fileName);
  try {
    FileContents fc = null;
    try {
      fc = ps.get(fileURL);
    } catch (FileNotFoundException e) {
      /* Verify that the max size for new PersistenceService
       * files is >= 100K (2^17) before opening one.
       */
      long maxSizeRequest = 131072L;
      long maxSize = ps.create(fileURL, maxSizeRequest);
      if (maxSize >= maxSizeRequest) {
        fc = ps.get(fileURL);
      }
    }
    if ((fc != null) && (fc.canWrite())) {
      return new BufferedOutputStream(fc.getOutputStream(!append));
    } else {
      throw new IOException("unable to create FileContents object");
    }
  } catch (Exception e) {
    throw new IOException("openOutputFile \"" + fileName + "\" failed", e);
  }
}

public InputStream openInputFile(String fileName) throws IOException {
  checkBasics("openInputFile");
  URL fileURL = fileNameToURL(fileName);
  try {
  return new BufferedInputStream(ps.get(fileURL).getInputStream());
  } 
  catch(Exception e) {
  throw new LSException("openInputFile \"" + fileName + "\" failed", e);
  }
}

URL baseURL = bs.getCodeBase();
URL configURL = new URL(baseURL, fileName);
FileContents fc = ps.get(configURL);
DataInputStream ois = new DataInputStream(fc.getInputStream());

fc = m_ps.get(url);
  fc = m_ps.get(url);

public OutputStream openOutputFile(String fileName) throws IOException {
  checkBasics("openOutputFile");
  URL fileURL = fileNameToURL(fileName);
  try {
  FileContents fc = null;
  try {
    fc = ps.get(fileURL);  
  }
  catch (FileNotFoundException e) {
    /* Verify that the max size for new PersistenceService 
     * files is >= 100K (2^17) before opening one.
     */
    long maxSizeRequest = 131072L;
    long maxSize = ps.create(fileURL, maxSizeRequest);
    if (maxSize >= maxSizeRequest) {
    fc = ps.get(fileURL);
    }
  }
  if ((fc != null) && (fc.canWrite())) {
    return new BufferedOutputStream(fc.getOutputStream(true));
  }
  else {
    throw new IOException("unable to create FileContents object");
  }
  } 
  catch(Exception e) {
  throw new LSException("openOutputFile \"" + fileName + "\" failed", e);
  }
}

ps.create(configURL, 1024); // 1024 bytes for our data
FileContents fc = ps.get(configURL);
DataOutputStream oos = new DataOutputStream(fc
    .getOutputStream(false));