/// <summary>
/// Creates a <code>OWFileInputStream</code> by
/// opening a connection to an actual file,
/// the file named by the <code>File</code>
/// object <code>file</code> in the Filesystem.
/// A new <code>OWFileDescriptor</code> object
/// is created to represent this file connection.
/// <para>
/// If the named file does not exist, is a directory rather than a regular
/// file, or for some other reason cannot be opened for reading then a
/// <code>FileNotFoundException</code> is thrown.
///
/// </para>
/// </summary>
/// <param name="file"> the file to be opened for reading. </param>
/// <exception cref="FileNotFoundException"> if the file does not exist,
/// is a directory rather than a regular file,
/// or for some other reason cannot be opened for
/// reading. </exception>
/// <seealso cref= com.dalsemi.onewire.application.file.OWFile#getPath() </seealso>
public OWFileInputStream(OWFile file)
{
// get the file descriptor
try
{
fd = file.FD;
}
catch (System.IO.IOException e)
{
fd.free();
fd = null;
throw new OWFileNotFoundException(e.ToString());
}
// open the file
try
{
fd.open();
}
catch (OWFileNotFoundException e)
{
fd.free();
fd = null;
throw new OWFileNotFoundException(e.ToString());
}
// make sure it is not a directory
if (!fd.File)
{
fd.free();
fd = null;
throw new OWFileNotFoundException("Not a file");
}
}
/// <summary>
/// Creates a <code>OWFileInputStream</code> by using the file descriptor
/// <code>fdObj</code>, which represents an existing connection to an
/// actual file in the Filesystem.
/// <para>
/// If <code>fdObj</code> is null then a <code>NullPointerException</code>
/// is thrown.
///
/// </para>
/// </summary>
/// <param name="fdObj"> the file descriptor to be opened for reading. </param>
public OWFileInputStream(OWFileDescriptor fdObj)
{
if (fdObj == null)
{
throw new System.NullReferenceException("OWFile provided is null");
}
fd = fdObj;
}
/// <summary>
/// Closes this file input stream and releases any system resources
/// associated with the stream.
/// </summary>
/// <exception cref="IOException"> if an I/O error occurs. </exception>
public virtual void close()
{
if (fd != null)
{
fd.close();
}
else
{
throw new System.IO.IOException("1-Wire FileDescriptor is null");
}
fd = null;
}
/// <summary>
/// Creates a file output stream to write to the file represented by
/// the specified <code>File</code> object. A new
/// <code>OWFileDescriptor</code> object is created to represent this
/// file connection.
/// <para>
/// First, if there is a security manager, its <code>checkWrite</code>
/// method is called with the path represented by the <code>file</code>
/// argument as its argument.
/// </para>
/// <para>
/// If the file exists but is a directory rather than a regular file, does
/// not exist but cannot be created, or cannot be opened for any other
/// reason then a <code>FileNotFoundException</code> is thrown.
///
/// </para>
/// </summary>
/// <param name="file"> the file to be opened for writing. </param>
/// <exception cref="FileNotFoundException"> if the file exists but is a directory
/// rather than a regular file, does not exist but cannot
/// be created, or cannot be opened for any other reason </exception>
/// <exception cref="SecurityException"> if a security manager exists and its
/// <code>checkWrite</code> method denies write access
/// to the file. </exception>
/// <seealso cref= java.io.File#getPath() </seealso>
public OWFileOutputStream(OWFile file)
{
try
{
fd = file.FD;
}
catch (System.IO.IOException e)
{
fd.free();
fd = null;
throw new OWFileNotFoundException(e.ToString());
}
fd.open();
}
/// <summary>
/// Creates an output file stream to write to the file with the specified
/// <code>name</code>. If the second argument is <code>true</code>, then
/// bytes will be written to the end of the file rather than the beginning.
/// A new <code>OWFileDescriptor</code> object is created to represent this
/// file connection.
/// <para>
/// First, if there is a security manager, its <code>checkWrite</code>
/// method is called with <code>name</code> as its argument.
/// </para>
/// <para>
/// If the file exists but is a directory rather than a regular file, does
/// not exist but cannot be created, or cannot be opened for any other
/// reason then a <code>FileNotFoundException</code> is thrown.
///
/// </para>
/// </summary>
/// <param name="owd"> array of OneWireContainers that this Filesystem resides on </param>
/// <param name="name"> the system-dependent file name </param>
/// <param name="append"> if <code>true</code>, then bytes will be written
/// to the end of the file rather than the beginning </param>
/// <exception cref="FileNotFoundException"> if the file exists but is a directory
/// rather than a regular file, does not exist but cannot
/// be created, or cannot be opened for any other reason. </exception>
/// <exception cref="SecurityException"> if a security manager exists and its
/// <code>checkWrite</code> method denies write access
/// to the file. </exception>
public OWFileOutputStream(OneWireContainer[] owd, string name, bool append)
{
fd = new OWFileDescriptor(owd, name);
try
{
fd.create(append, false, false, -1, -1);
}
catch (OWFileNotFoundException e)
{
fd.free();
fd = null;
throw new OWFileNotFoundException(e.ToString());
}
}
//--------
//-------- Constructors
//--------
/// <summary>
/// Creates an output file stream to write to the file with the
/// specified name. A new <code>OWFileDescriptor</code> object is
/// created to represent this file connection.
/// <para>
/// First, if there is a security manager, its <code>checkWrite</code>
/// method is called with <code>name</code> as its argument.
/// </para>
/// <para>
/// If the file exists but is a directory rather than a regular file, does
/// not exist but cannot be created, or cannot be opened for any other
/// reason then a <code>FileNotFoundException</code> is thrown.
///
/// </para>
/// </summary>
/// <param name="owd"> OneWireContainer that this Filesystem resides on </param>
/// <param name="name"> the system-dependent filename </param>
/// <exception cref="FileNotFoundException"> if the file exists but is a directory
/// rather than a regular file, does not exist but cannot
/// be created, or cannot be opened for any other reason </exception>
/// <exception cref="SecurityException"> if a security manager exists and its
/// <code>checkWrite</code> method denies write access
/// to the file. </exception>
public OWFileOutputStream(OneWireContainer owd, string name)
{
OneWireContainer[] devices = new OneWireContainer[1];
devices[0] = owd;
fd = new OWFileDescriptor(devices, name);
try
{
fd.create(false, false, false, -1, -1);
}
catch (OWFileNotFoundException e)
{
fd.free();
fd = null;
throw new OWFileNotFoundException(e.ToString());
}
}
/// <summary>
/// Sync's the file Descriptor, prompts for retry if there is
/// an exception.
/// </summary>
/// <param name="fd"> OWFileDescriptor of Filesystem to sync </param>
internal static void syncFileDescriptor(OWFileDescriptor fd)
{
for (;;)
{
try
{
fd.sync();
return;
}
catch (OWSyncFailedException e)
{
Debug.WriteLine("");
Debug.WriteLine("-----------------------------------------------");
Debug.WriteLine(e);
Debug.WriteLine("-----------------------------------------------");
// prompt to try again
if (menuSelect(retryMenu) == RETRY_NO)
{
return;
}
}
}
}
/// <summary>
/// Creates a <code>FileInputStream</code> by
/// opening a connection to an actual file,
/// the file named by the path name <code>name</code>
/// in the Filesystem. A new <code>OWFileDescriptor</code>
/// object is created to represent this file
/// connection.
/// <para>
/// First, if there is a security
/// manager, its <code>checkRead</code> method
/// is called with the <code>name</code> argument
/// as its argument.
/// </para>
/// <para>
/// If the named file does not exist, is a directory rather than a regular
/// file, or for some other reason cannot be opened for reading then a
/// <code>FileNotFoundException</code> is thrown.
///
/// </para>
/// </summary>
/// <param name="owd"> array of OneWireContainers that this Filesystem resides on </param>
/// <param name="name"> the system-dependent file name. </param>
/// <exception cref="FileNotFoundException"> if the file does not exist,
/// is a directory rather than a regular file,
/// or for some other reason cannot be opened for
/// reading. </exception>
public OWFileInputStream(OneWireContainer[] owd, string name)
{
fd = new OWFileDescriptor(owd, name);
// open the file
try
{
fd.open();
}
catch (OWFileNotFoundException e)
{
fd.free();
fd = null;
throw new OWFileNotFoundException(e.ToString());
}
// make sure this is not directory
if (!fd.File)
{
fd.free();
fd = null;
throw new OWFileNotFoundException("Not a file");
}
}
