141 lines
4.7 KiB
C#
141 lines
4.7 KiB
C#
//Copyright (C) 2005 Richard J. Northedge
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//
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// This library is free software; you can redistribute it and/or
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// modify it under the terms of the GNU Lesser General Public
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// License as published by the Free Software Foundation; either
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// version 2.1 of the License, or (at your option) any later version.
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//
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// This library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public
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// License along with this program; if not, write to the Free Software
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// Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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//This file is based on the BinaryGISModelWriter.java source file found in the
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//original java implementation of MaxEnt. That source file contains the following header:
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// Copyright (C) 2001 Jason Baldridge and Gann Bierner
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//
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// This library is free software; you can redistribute it and/or
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// modify it under the terms of the GNU Lesser General Public
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// License as published by the Free Software Foundation; either
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// version 2.1 of the License, or (at your option) any later version.
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//
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// This library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public
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// License along with this program; if not, write to the Free Software
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// Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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using System;
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using System.IO;
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namespace BotSharp.MachineLearning.IO
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{
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/// <summary>
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/// A writer for GIS models that saves models in the binary format used by the java
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/// version of MaxEnt. This binary format stores data using big-endian values, which means
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/// that the C# version must reverse the byte order of each value in turn, making it
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/// less efficient. Use only for compatibility with the java MaxEnt library.
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/// </summary>
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/// <author>
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/// Jason Baldridge
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/// </author>
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/// <author>
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/// Richard J. Northedge
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/// </author>
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/// <version>
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/// based on BinaryGISModelWriter.java $Revision: 1.1.1.1 $, $Date: 2001/10/23 14:06:53 $
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/// </version>
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public class JavaBinaryGisModelWriter : GisModelWriter
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{
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private Stream mOutput;
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private byte[] mBuffer = new byte[7];
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private System.Text.Encoding mEncoding = System.Text.Encoding.UTF8;
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/// <summary>
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/// Default constructor.
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/// </summary>
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public JavaBinaryGisModelWriter()
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{
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}
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/// <summary> Takes a GisModel and a File and
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/// writes the model to that file.
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/// </summary>
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/// <param name="model">The GisModel which is to be persisted.
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/// </param>
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/// <param name="fileName">The name of the file in which the model is to be persisted.
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/// </param>
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public void Persist(GisModel model, string fileName)
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{
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using (mOutput = new FileStream(fileName, FileMode.Create))
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{
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base.Persist(model);
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}
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}
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/// <summary>
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/// Takes a GisModel and a Stream and writes the model to that stream.
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/// </summary>
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/// <param name="model">
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/// The GIS model which is to be persisted.
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/// </param>
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/// <param name="dataOutputStream">
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/// The Stream which will be used to persist the model.
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/// </param>
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public void Persist(GisModel model, Stream dataOutputStream)
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{
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using (mOutput = dataOutputStream)
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{
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base.Persist(model);
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}
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}
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/// <summary>
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/// Writes a UTF-8 encoded string to the model file.
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/// </summary>
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/// /// <param name="data">
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/// The string data to be persisted.
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/// </param>
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protected override void WriteString(string data)
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{
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mOutput.WriteByte((byte)(mEncoding.GetByteCount(data) / 256));
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mOutput.WriteByte((byte)(mEncoding.GetByteCount(data) % 256));
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mOutput.Write(mEncoding.GetBytes(data), 0, mEncoding.GetByteCount(data));
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}
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/// <summary>
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/// Writes a 32-bit signed integer to the model file.
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/// </summary>
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/// /// <param name="data">
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/// The integer data to be persisted.
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/// </param>
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protected override void WriteInt32(int data)
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{
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mBuffer = BitConverter.GetBytes(data);
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Array.Reverse(mBuffer);
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mOutput.Write(mBuffer, 0, 4);
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}
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/// <summary>
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/// Writes a double-precision floating point number to the model file.
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/// </summary>
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/// /// <param name="data">
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/// The floating point data to be persisted.
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/// </param>
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protected override void WriteDouble(double data)
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{
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mBuffer = BitConverter.GetBytes(data);
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Array.Reverse(mBuffer);
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mOutput.Write(mBuffer, 0, 8);
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}
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}
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}
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