Read a file and print, using LineReader and System.out
/*
* Copyright (c) Ian F. Darwin, http://www.darwinsys.com/, 1996-2002.
* All rights reserved. Software written by Ian F. Darwin and others.
* $Id: LICENSE,v 1.8 2004/02/09 03:33:38 ian Exp $
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS''
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
* Java, the Duke mascot, and all variants of Sun's Java "steaming coffee
* cup" logo are trademarks of Sun Microsystems. Sun's, and James Gosling's,
* pioneering role in inventing and promulgating (and standardizing) the Java
* language and environment is gratefully acknowledged.
*
* The pioneering role of Dennis Ritchie and Bjarne Stroustrup, of AT&T, for
* inventing predecessor languages C and C++ is also gratefully acknowledged.
*/
import java.io.*;
/**
* Read a file and print, using LineReader and System.out
*/
public class DropReceivedLines {
public static void main(String[] av) {
DropReceivedLines d = new DropReceivedLines();
// For stdin, act as a filter. For named files,
// update each file in place (safely, by creating a new file).
try {
if (av.length == 0)
d.process(new BufferedReader(
new InputStreamReader(System.in)),
new PrintWriter(System.out));
else for (int i=0; i<av.length; i++)
d.process(av[i]);
} catch (FileNotFoundException e) {
System.err.println(e.getMessage());
} catch (IOException e) {
System.err.println("I/O error " + e);
}
}
protected static File tempFile = new File("holding.tmp");
/** Process one file given only its name */
public void process(String fileName) throws IOException {
File old = new File(fileName);
String newFileName = fileName + ".TMP";
File newf = new File(newFileName);
BufferedReader is =
new BufferedReader(new FileReader(fileName));
PrintWriter p = new PrintWriter(new FileWriter(newFileName));
process(is, p); // call other process(), below
p.close();
old.renameTo(tempFile);
newf.renameTo(old);
tempFile.delete();
}
/** process one file, given an open LineReader */
public void process(BufferedReader is, PrintWriter out)
throws IOException {
try {
String lin;
// If line begins with "Received:", ditch it, and its continuations
while ((lin = is.readLine()) != null) {
if (lin.startsWith("Received:")) {
do {
lin = is.readLine();
} while (lin.length() > 0 &&
Character.isWhitespace(lin.charAt(0)));
}
out.println(lin);
}
is.close();
out.close();
} catch (IOException e) {
System.out.println("IOException: " + e);
}
}
}
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