} // materializeMainSchemaTable()
private DocumentSource createDocumentSource()
{
Debug.WriteLine("JsonDataContext.createDocumentSource()");
NInputStream input_stream = _resource.read();
try
{
// MappingJsonFactory jsonFactory = new MappingJsonFactory();
NJsonParser parser = new NJsonParser(input_stream); // jsonFactory.createParser(inputStream);
logger.debug("Created JSON parser for resource: {0}", _resource);
return(new JsonDocumentSource(parser, _resource.getName()));
}
catch (Exception e)
{
Debug.WriteLine("Unexpected error while creating JSON parser \n " + e.Message);
try
{
Debug.WriteLine("Trying to close input_stream");
FileHelper.safeClose(input_stream);
}
catch (Exception e1)
{
throw new MetaModelException("Tried to close input_stream\n " + e1.Message);
}
throw new MetaModelException("... Unexpected error while creating JSON parser \n " + e.Message);
}
} // createDocumentSource()
/**
* Method invoked by the Java serialization framework while deserializing
* Row instances. Since previous versions of MetaModel did not use a
* DataSetHeader, but had a reference to a List<SelectItem>, this
* deserialization is particularly tricky. We check if the items variable is
* there, and if it is, we convert it to a header instead.
*
* @param stream
* @throws Exception
*/
private void readObject(Object o, NInputStream stream) // throws Exception
{
XmlSerializer serializer = new XmlSerializer(o.GetType());
object read_data = serializer.Deserialize(stream); //.readFields();
FieldInfo[] fields = read_data.GetType().GetFields();
FieldInfo items_field = NTypeUtils.getField(read_data.GetType(), "_items");
NGetField get_field = new NGetField(read_data, fields);
try
{
// backwards compatible deserialization, convert items to header
Object items = items_field.GetValue(read_data);
//@SuppressWarnings("unchecked")
List <SelectItem> itemsList = (List <SelectItem>)items;
SimpleDataSetHeader header = new SimpleDataSetHeader(itemsList);
FieldInfo field = NTypeUtils.getField(GetType(), "_header");
// field.setAccessible(true);
field.SetValue(this, header);
}
catch (ArgumentException e)
{
// no backwards compatible deserialization needed.
setWhileDeserializing(get_field, "_header");
}
setWhileDeserializing(get_field, "_values");
setWhileDeserializing(get_field, "_styles");
} // readObject()
} // getLastModified()
// @Override
public override NInputStream read() // throws ResourceException
{
if (_file.isDirectory())
{
return(new DirectoryInputStream(_file.Path, _file.Mode, this));
}
NInputStream in_stream = FileHelper.getInputStream((NInputStream)_file);
return(in_stream);
} // read()
public NJsonParser(NInputStream input_stream)
{
Debug.WriteLine("new NJsonParser()");
byte[] data = input_stream.readFile();
_data_str = "";
foreach (byte b in data)
{
_data_str += (char)b;
}
//parse(_data_str);
} // constructor
} // getOutputStream()
public static NInputStream getInputStream(NInputStream stream_arg) // throws IllegalStateException
{
//try
//{
// return new BufferedInputStream(new FileInputStream(stream_arg));
//}
//catch (FileNotFoundException e)
//{
// throw new InvalidOperationException(e.Message);
//}
//return new NInputStream(stream_arg.SafeFileHandle, FileAccess.Read);
return(stream_arg);
} // getInputStream()
} // available()
private bool openNextFile() // throws IOException
{
if (_currentInputStream != null)
{
FileHelper.safeClose(_currentInputStream);
_currentInputStream = null;
}
_currentFileIndex++;
if (_currentFileIndex >= _files.Length)
{
return(false);
}
_currentInputStream = openStream(_currentFileIndex);
return(true);
} // openNextFile()
} // getBufferedReader
public static void copy(NInputStream from_stream, NOutputStream to_stream) // throws IllegalStateException
{
try
{
byte[] buffer = new byte[1024 * 32];
int offset = 0;
for (int value = from_stream.Read(buffer, offset++, 1); value != -1; value = from_stream.Read(buffer, offset++, 1))
{
to_stream.Write(buffer, 0, value);
}
}
catch (IOException e)
{
throw new InvalidOperationException(e.Message);
}
}
public void read(NAction <NInputStream> readCallback)
{
NInputStream in_stream = read();
try
{
readCallback.run(in_stream);
}
catch (Exception e)
{
throw new NResourceException("Error occurred in read callback", e);
}
finally
{
FileHelper.safeClose(in_stream);
}
} // read()
} // read()
public E read <E>(NFunc <NInputStream, E> readCallback)
{
NInputStream in_stream = read();
try
{
E result = readCallback.eval(in_stream);
return(result);
}
catch (Exception e)
{
throw new NResourceException("Error occurred in read callback", e);
}
finally
{
FileHelper.safeClose(in_stream);
}
} // read()
public static void copy(Resource from_res, Resource to_res) // throws IllegalStateException
{
Debug.Assert(from_res.isExists());
NInputStream in_stream = from_res.read();
try
{
NOutputStream out_stream = to_res.write();
try
{
copy(in_stream, out_stream);
}
finally
{
safeClose(out_stream);
}
}
finally
{
safeClose(in_stream);
}
} // copy()
} // getInputStream()
public static byte[] readAsBytes(NInputStream input_stream)
{
//ByteArrayOutputStream baos = new ByteArrayOutputStream();
MemoryStream memory_stream = new MemoryStream();
StreamWriter baos = new StreamWriter(memory_stream);
StreamReader reader = new StreamReader(input_stream);
try
{
copy(reader, baos);
}
finally
{
safeClose(input_stream);
}
string output_str = baos.ToString();
byte[] result = new byte[output_str.Length];
for (int i = 0; i < output_str.Length; i++)
{
result[i] = (byte)output_str[i];
}
return(result);
} // readAsBytes()
public JsonDataContext(NInputStream input_stream) : this(new FileResource(input_stream))
{
Debug.WriteLine("new JsonDataContext(NInputStream)");
} // constructor
public static String readFileAsString(NInputStream in_stream, String encoding) // throws IllegalStateException
{
StreamReader br = getReader(in_stream, encoding);
return(readAsString(br));
} // readFileAsString()
} // getBufferedWriter()
public static StreamReader getBufferedReader(NInputStream inputStream, String encoding) // throws IllegalStateException
{
StreamReader reader = getReader(inputStream, encoding);
return(reader);
} // getBufferedReader()
} // getReader()
public static String readFileAsString(NInputStream stream_arg) // throws IllegalStateException
{
return(readFileAsString(stream_arg, DEFAULT_ENCODING));
}
} // getWriter()
//public static StreamWriter getWriter(NOutputStream file, String encoding) // throws IllegalStateException
//{
// return getWriter(file, encoding, false);
//} // getWriter()
public static StreamReader getReader(NInputStream input_stream, String encoding_arg) // throws IllegalStateException
{
Encoding encoding_obj = null;
try
{
if (encoding_arg == null || encoding_arg.ToLower().IndexOf("utf") != -1)
{
byte[] bom = new byte[4];
int unread;
// auto-detect byte-order-mark
//@SuppressWarnings("resource")
NInputStream pushbackInputStream = new NInputStream(input_stream.SafeFileHandle, FileAccess.Read, bom.Length);
int n = pushbackInputStream.Read(bom, 0, bom.Length);
// Read ahead four bytes and check for BOM marks.
if ((bom[0] == (byte)0xEF) && (bom[1] == (byte)0xBB) && (bom[2] == (byte)0xBF))
{
encoding_arg = "UTF-8";
unread = n - 3;
encoding_obj = Encoding.UTF8;
}
else if ((bom[0] == (byte)0xFE) && (bom[1] == (byte)0xFF))
{
encoding_arg = "UTF-16BE";
unread = n - 2;
}
else if ((bom[0] == (byte)0xFF) && (bom[1] == (byte)0xFE))
{
encoding_arg = "UTF-16LE";
unread = n - 2;
}
else if ((bom[0] == (byte)0x00) && (bom[1] == (byte)0x00) && (bom[2] == (byte)0xFE) &&
(bom[3] == (byte)0xFF))
{
encoding_arg = "UTF-32BE";
encoding_obj = Encoding.UTF32;
unread = n - 4;
}
else if ((bom[0] == (byte)0xFF) && (bom[1] == (byte)0xFE) && (bom[2] == (byte)0x00) &&
(bom[3] == (byte)0x00))
{
encoding_obj = Encoding.UTF32;
encoding_arg = "UTF-32LE";
unread = n - 4;
}
else
{
unread = n;
}
if (unread > 0)
{
//pushbackInputStream.unread(bom, (n - unread), unread);
}
else if (unread < -1)
{
//pushbackInputStream.unread(bom, 0, 0);
}
input_stream = pushbackInputStream;
}
StreamReader inputStreamReader;
if (encoding_arg == null)
{
inputStreamReader = new StreamReader(input_stream);
}
else
{
if (encoding_obj != null)
{
inputStreamReader = new StreamReader(input_stream, encoding_obj);
}
else
{
throw new IOException("getReader(): Encoding not available");
}
}
return(inputStreamReader);
}
catch (IOException e)
{
throw new InvalidOperationException(e.Message);
}
} // getReader()
} // writeStringAsFile()
public static StreamReader getBufferedReader(NInputStream stream_arg) // throws IllegalStateException
{
return(getBufferedReader(stream_arg, DEFAULT_ENCODING));
} // getBufferedReader()
