externallauncher.java

编辑视频文件

/*
 * File:     ExternalLauncher.java
 * Project:  MPI Linguistic Application
 * Date:     02 May 2007
 *
 * Copyright (C) 2001-2007  Max Planck Institute for Psycholinguistics
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

package mpi.eudico.client.annotator.integration;

import mpi.eudico.client.annotator.Constants;
import mpi.eudico.client.annotator.ElanFrame2;
import mpi.eudico.client.annotator.FrameManager;

import mpi.util.LogUtil;

import org.xml.sax.SAXException;

import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;

import java.net.URI;
import java.net.URISyntaxException;

import java.util.HashMap;
import java.util.Vector;
import java.util.logging.Logger;

import javax.swing.JOptionPane;


/**
 * This class acts as a listener to a file in the elan home dir and opens a new
 * ElanFrame once a new open request has been written to it. Follows the
 * Singleton pattern.
 *
 * @author Han Sloetjes
 */
public class ExternalLauncher {
    /** a Logger */
    private static final Logger LOG = Logger.getLogger(ExternalLauncher.class.getName());
    private static String exchangeFile = "externallaunch";

    /** the open command */

    //private static final String OPEN = "open";

    /** the executed command */

    //private static final String EXECUTED = "executed";

    /** the IMDI session command */
    private static final String IMDI_SESSION = "IMDI_Session: ";
    private static File launchFile;
    private static FileReader reader;
    private static ExternalLauncher externalLauncher;
    private static LaunchThread launchThread;
    private static long lastModified = 0L;
    private static boolean running = false;

    /**
     * Creates a new ExternalLauncher instance
     */
    private ExternalLauncher() {
        init();
    }

    /**
     * Starts the listener/polling thread.
     */
    public static void start() {
        if (externalLauncher == null) {
            externalLauncher = new ExternalLauncher();
            LOG.info("External launch thread started...");
        }
    }

    /**
     * Stops the listener/polling thread and deletes the external launch file.
     * Note: maybe change the return type to boolean, to confirm the deletion
     * of the file succeeded.
     */
    public static void stop() {
        running = false;

        if ((launchThread != null) && launchThread.isAlive()) {
            try {
                launchThread.interrupt();
            } catch (SecurityException se) {
                LOG.warning("Could not stop the launch thread.\n" +
                    LogUtil.formatStackTrace(se));
            }
        }

        if (reader != null) {
            try {
                reader.close();
            } catch (IOException ioe) {
                LOG.warning("Could not close the file: " +
                    launchFile.getAbsolutePath() + "\n" +
                    LogUtil.formatStackTrace(ioe));
            }
        }

        if (launchFile != null) {
            try {
                launchFile.delete();
            } catch (SecurityException se) {
                LOG.warning("Could not delete the file: " +
                    launchFile.getAbsolutePath() + "\n" +
                    LogUtil.formatStackTrace(se));
            }
        }

        LOG.info("External launch thread stopped...");
    }

    /**
     * Starts the listener thread.
     *
     * @param exchangeFileName the file to read from
     */
    public static void start(String exchangeFileName) {
        if (externalLauncher == null) {
            if ((exchangeFileName != null) && (exchangeFileName.length() > 0)) {
                exchangeFile = exchangeFileName;
            }

            externalLauncher = new ExternalLauncher();
        }
    }

    private static void init() {
        launchFile = new File(Constants.ELAN_DATA_DIR, exchangeFile);

        if (launchFile.exists()) {
            launchFile.deleteOnExit(); //??
        }

        launchThread = new LaunchThread(1000);
        launchThread.setPriority(Thread.MIN_PRIORITY);
        running = true;
        launchThread.start();

        // for testing
        // new TestLauncher().start();		
    }

    private static void checkChange() {
        if (!running) {
            return;
        }

        if ((launchFile == null) || !launchFile.exists()) {
            return;
        }

        if ((lastModified == 0) || (lastModified < launchFile.lastModified())) {
            try {
                reader = new FileReader(launchFile);

                char[] ch = new char[(int) launchFile.length()];
                reader.read(ch);

                String line = new String(ch);

                if (line != null) {
                    //System.out.println("Read: " + line);
                    openElanFrame(line);

                    lastModified = launchFile.lastModified();
                }

                reader.close();
            } catch (FileNotFoundException fnfe) {
                LOG.severe("Could not read file: \n" +
                    launchFile.getAbsolutePath() +
                    LogUtil.formatStackTrace(fnfe));
            } catch (IOException ioe) {
                LOG.severe("Error reading file: \n" +
                    launchFile.getAbsolutePath() +
                    LogUtil.formatStackTrace(ioe));
            }
        }
    }

    private static void openElanFrame(String line) {
        if ((line == null)) {
            return;
        }

        //String directive = line.substring(OPEN.length() + 1);
        if (line.startsWith(IMDI_SESSION)) {
            // parse imdi file
            String IMDIString = line.substring(IMDI_SESSION.length());

            if (IMDIString.length() > 0) {
                IMDIString = pathToURLString(IMDIString);

                IMDISessionParser parser = new IMDISessionParser();
                HashMap filesMap = null;

                try {
                    parser.parse(IMDIString);
                    filesMap = parser.getFilesMap();
                } catch (IOException ioe) {
                    LOG.warning("Could not access the .imdi file\n" +
                        LogUtil.formatStackTrace(ioe));
                    showWarningDialog(
                        "Elan launcher:\nCould not access the imdi file.");

                    return;
                } catch (SAXException sax) {
                    LOG.warning("Could not parse the .imdi file\n" +
                        LogUtil.formatStackTrace(sax));
                    showWarningDialog(
                        "Elan launcher:\nCould not parse the imdi file.");

                    return;
                }

                if (filesMap != null) {
                    String eafString = (String) filesMap.get(IMDISessionParser.EAF);

                    if ((eafString == null) ||
                            !eafString.toLowerCase().endsWith(".eaf")) {
                        LOG.warning("No .eaf file found");
                        showWarningDialog(
                            "Elan launcher:\nNo eaf file found in the imdi file.");

                        return;
                    } else {
                        // create an absolute path...
                        eafString = absolutePath(IMDIString, eafString);
                        LOG.info("Launching: " + eafString);
                    }

                    String videoString = (String) filesMap.get("video");
                    String audioString = (String) filesMap.get("audio");
                    Vector mediaFiles = new Vector();