/*
 *                 Sun Public License Notice
 *
 * The contents of this file are subject to the Sun Public License
 * Version 1.0 (the "License"). You may not use this file except in
 * compliance with the License. A copy of the License is available at
 * http://www.sun.com/
 *
 * The Original Code is NetBeans. The Initial Developer of the Original
 * Code is Sun Microsystems, Inc. Portions Copyright 1997-2000 Sun
 * Microsystems, Inc. All Rights Reserved.
 */

package org.netbeans.modules.javacvs.commands;

/**
 * A command listener that enables to wait for the end of the command in the current thread.
 * Warning: be sure to execute the command from a non-AWT thread. Otherwise your
 * application hangs.
 * The class also collects the generated fileinfocontainers..
 * @author  mkleint
 */

import org.netbeans.lib.cvsclient.command.Command;
import org.netbeans.lib.cvsclient.command.FileInfoContainer;
import org.netbeans.lib.cvsclient.event.MessageEvent;
import org.netbeans.modules.javacvs.events.*;
import org.netbeans.modules.javacvs.CvsCommand;
import java.util.*;


public class AbstractWaitForResultsDisplayer extends CommandDisplayerAdapter
                                             implements CommandErrorListener
{
    private CvsCommand command;
    private boolean finished;
    private boolean isError;
    private long milis = 2000;
    private LinkedList resultList;
    
    public AbstractWaitForResultsDisplayer(CvsCommand command) {
        this.command = command;
        isError = false;
        resultList = new LinkedList();
        command.addCommandErrorListener(this);
        command.addDisplayerListener(this);
    }
    
    /**
     * Determines the spleeing interval for the current thread that's waiting for the
     * command to finish. 
     */
    public void setSamplingTime(long miliseconds) {
        milis = miliseconds;
        if (milis < 10) milis = 10;
    }
    
    /**
     * This method should be used to start the command. The method in the current thread
     * will wait for the command's thread to finish.
     * @returns boolean value, if the command ends with an error, returns true, otherwise false.
     */
    public boolean runAndWaitForFinish() {
        setFinished(false);
        command.startCommand();
        while (!isFinished()) {
            try {
                Thread.sleep(milis);
            } catch (InterruptedException exc) {}
        }
        return isError;
    }
    
    public synchronized boolean isFinished() {
        return finished;
    }
    
    public synchronized void setFinished(boolean fin) {
        finished = fin;
    }
    
    
    public void showExecutionFailed(Exception exception) {
        isError = true;
        setFinished(true);
    }
    
    public void showFileInfoGenerated(FileInfoContainer info) {
        resultList.add(info);
    }
    
    public void showFinishedCommand() {
        setFinished(true);
    }
    
    public void errorGenerated(CommandErrorEvent event) {
        isError = event.endedWithError();
    }
    
    public List getResultList() {
        return resultList;
    }
    
    
}