listwisedeletion.java

利用Java实现的神经网络工具箱

/*
 * $RCSfile: ListwiseDeletion.java,v $
 * $Revision: 1.1 $
 * $Date: 2005/04/17 00:38:41 $
 *
 * NeuralNetworkToolkit
 * Copyright (C) 2004 Universidade de Bras�lia
 *
 * This file is part of NeuralNetworkToolkit.
 *
 * NeuralNetworkToolkit is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * NeuralNetworkToolkit is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with NeuralNetworkToolkit; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA - 02111-1307 - USA.
 */

package neuralnetworktoolkit.preprocessor;

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.util.ResourceBundle;

import neuralnetworktoolkit.datamanager.textfilemanager.LoadFromFileException;

/**
 * @author <a href="mailto:[e-mail]">Hugo Iver V. Gon�alves</a>
 * @author <a href="mailto:[e-mail]">Rodrigo C. M. Coimbra</a>
 */
public class ListwiseDeletion {
	
	private ResourceBundle resources;
	
	/** Stores attributes names. */
	private String[] dataHeader;
	
	/**
	 * 
	 * @param file
	 * @param separator
	 * 
	 * @throws LoadFromFileException
	 */
	public void delete(File file, String separator, String missingSymbol) throws ListwiseDeletionException {
		String         readedDataHeader;
		String         dataLine;
		String 		   newLine = new String();
		String[]	   dataValues;
		File 		   outputFile;
		FileReader     inputReader;
		FileWriter 	   fileWriter;
		BufferedReader inputBuffer;
		BufferedWriter writeBuffer;
		int 		   size = 0;
		boolean 	   hasMissing;
				
		try {
			//resources = ResourceBundle.getBundle("neuralnetworktoolkit.preprocessor.resources.Messages");
			inputReader      = new FileReader(file);
			outputFile 		 = new File(file.getName() + "-listwiseD");
			fileWriter 		 = new FileWriter(outputFile);
			outputFile.createNewFile();
			writeBuffer 	 = new BufferedWriter(fileWriter);
			inputBuffer      = new BufferedReader(inputReader);
						
			readedDataHeader = inputBuffer.readLine();
			writeBuffer.write(readedDataHeader);
			writeBuffer.newLine();
			
			dataHeader = readedDataHeader.split(separator);
			size = dataHeader.length;
						
			while(inputBuffer.ready()) {
				hasMissing = false;
				dataLine = inputBuffer.readLine();
				dataValues = dataLine.split(separator);
				
				for (int i = 0; (i < size)&&(!hasMissing); i++) {
					
					if (missingSymbol.equals(dataValues[i])) {
						hasMissing = true;
					}
				}
			
				if (!hasMissing) {
					writeBuffer.write(dataLine);
					writeBuffer.newLine();
				}
				
			}
			
			writeBuffer.close();
						

		} catch(FileNotFoundException e) {
			throw new ListwiseDeletionException(resources.getString("fileNotFound") 
											+ " "
											+ file.getName()
											+ ".\n");

		} catch(IOException e) {
			throw new ListwiseDeletionException(resources.getString("failToRead")
											+" "
											+ file.getName()
											+ ".\n");
			
		} catch(NumberFormatException e) {
			throw new ListwiseDeletionException("Fail to read file "
											+ file.getName()
											+ ".\nThis is not a valid file!\n");
			
		}

	} // delete()
	
	public void delete(String fileName, String separator, String missingSymbol) throws ListwiseDeletionException {
		delete(new File(fileName), separator, missingSymbol);
		
	} //delete()

} //ListwiseDeletion