Package org.jnode.command.common

Source Code of org.jnode.command.common.EchoCommand

/*
* $Id$
*
* Copyright (C) 2003-2014 JNode.org
*
* 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.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
package org.jnode.command.common;

import java.io.PrintWriter;

import org.jnode.shell.AbstractCommand;
import org.jnode.shell.syntax.Argument;
import org.jnode.shell.syntax.StringArgument;

/**
* Echo the command's arguments to its output.
*
* @author epr
* @author crawley@jnode.org
*/
public class EchoCommand extends AbstractCommand {

    private static final String help_words = "the text to be printed";
    private static final String help_super = "Print text to standard output";
   
    private final StringArgument argWords;

    public EchoCommand() {
        super(help_super);
        argWords = new StringArgument("text", Argument.MULTIPLE, help_words);
        registerArguments(argWords);
    }

    public static void main(String[] args) throws Exception {
        new EchoCommand().execute(args);
    }

    /**
     * Execute the command
     */
    public void execute() throws Exception {
        PrintWriter out = getOutput().getPrintWriter();
        String[] words = argWords.getValues();
        for (int i = 0; i < words.length; i++) {
            if (i > 0) {
                out.print(' ');
            }
            out.print(words[i]);
        }
        out.println();
    }
}
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