HistoryCommand.java

/* Copyright 2009 by the Oxford University Computing Laboratory
   
   This file is part of HermiT.

   HermiT 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 3 of the License, or
   (at your option) any later version.
   
   HermiT 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 HermiT.  If not, see <http://www.gnu.org/licenses/>.
*/
package org.semanticweb.HermiT.debugger.commands;

import java.io.PrintWriter;

import org.semanticweb.HermiT.debugger.Debugger;

public class HistoryCommand extends AbstractCommand {

    public HistoryCommand(Debugger debugger) {
        super(debugger);
    }
    public String getCommandName() {
        return "history";
    }
    public String[] getDescription() {
        return new String[] { "on|off","switch derivation history on/off" };
    }
    public void printHelp(PrintWriter writer) {
        writer.println("usage: history on/off");
        writer.println("    Switches the derivation history on or off.");
    }
    public void execute(String[] args) {
        if (args.length<2) {
            m_debugger.getOutput().println("The status is missing.");
            return;
        }
        String status=args[1].toLowerCase();
        if ("on".equals(status)) {
            m_debugger.setForwardingOn(true);
            m_debugger.getOutput().println("Derivation history on.");
        }
        else if ("off".equals(status)) {
            m_debugger.setForwardingOn(false);
            m_debugger.getOutput().println("Derivation history off.");
        }
        else
            m_debugger.getOutput().println("Incorrect history status '"+status+"'.");
    }
}