com.vividsolutions.jtstest.util.FileUtil Maven / Gradle / Ivy

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/*
 * The JTS Topology Suite is a collection of Java classes that
 * implement the fundamental operations required to validate a given
 * geo-spatial data set to a known topological specification.
 *
 * Copyright (C) 2001 Vivid Solutions
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 * For more information, contact:
 *
 *     Vivid Solutions
 *     Suite #1A
 *     2328 Government Street
 *     Victoria BC  V8T 5G5
 *     Canada
 *
 *     (250)385-6040
 *     www.vividsolutions.com
 */
package com.vividsolutions.jtstest.util;

import java.io.*;
import java.util.*;

/**
 * Useful file utilities.
 *
 * @version 1.7
 */
public class FileUtil 
{
  public static final String EXTENSION_SEPARATOR = ".";

  public static String name(String path)
  {
    File file = new File(path);
    return file.getName();
  }

  public static String extension(String path)
  {
    String name = name(path);
    int extIndex = name.lastIndexOf(EXTENSION_SEPARATOR.charAt(0));
    if (extIndex < 0) return "";
    return name.substring(extIndex, name.length());
  }

    /**
     * Deletes the files in the directory, but does not remove the directory.
     */
    public static void deleteFiles(String directoryName) {
        File dir = new File(directoryName);
        File[] files = dir.listFiles();
        for (int i = 0; i < files.length; i++) {
            files[i].delete();
        }
    }

    /**
     * Returns true if the given directory exists.
     */
    public static boolean directoryExists(String directoryName) {
        File directory = new File(directoryName);
        return directory.exists();
    }

    /**
     * Returns a List of the String's in the text file, one per line.
     */
    public static List getContents(String textFileName) throws FileNotFoundException, IOException {
        List contents = new Vector();
        FileReader fileReader = new FileReader(textFileName);
        BufferedReader bufferedReader = new BufferedReader(fileReader);
        String line = bufferedReader.readLine();
        while (line != null) {
            contents.add(line);
            line = bufferedReader.readLine();
        }
        return contents;
    }
 
    public static String readText(String filename) 
    throws IOException 
    {
      return readText(new File(filename));
    }
    
    /**
     * Gets the contents of a text file as a single String
     * @param file
     * @return text file contents
     * @throws IOException
     */
 public static String readText(File file) 
  	throws IOException 
  	{
		String thisLine;
		StringBuffer strb = new StringBuffer("");

		FileInputStream fin = new FileInputStream(file);
		BufferedReader br = new BufferedReader(new InputStreamReader(fin));
		while ((thisLine = br.readLine()) != null) {
			strb.append(thisLine + "\r\n");
		}
		String result = strb.toString();
		return result;
	}

    /**
		 * Saves the String with the given filename
		 */
    public static void setContents(String textFileName, String contents) throws IOException {
        FileWriter fileWriter = new FileWriter(textFileName, false);
        BufferedWriter bufferedWriter = new BufferedWriter(fileWriter);
        bufferedWriter.write(contents);
        bufferedWriter.flush();
        bufferedWriter.close();
        fileWriter.close();
    }

    /**
     * Copies the source file to the destination filename.
     * Posted by Mark Thornton  on Usenet.
     */
    public static void copyFile(File source, File destination) throws IOException {
        RandomAccessFile out = new RandomAccessFile(destination, "rw");
        //Tell the OS in advance how big the file will be. This may reduce fragmentation
        out.setLength(source.length());
        //copy the content
        FileInputStream in = new FileInputStream(source);
        byte[] buffer = new byte[16384];
        while (true) {
            int n = in.read(buffer);
            if (n == -1)
                break;
            out.write(buffer, 0, n);
        }
        in.close();
        out.close();
    }
}