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Datei: InstallThread.java Sprache: JAVA

Original von: Isabelle^©

/*
* InstallThread.java
*
* Originally written by Slava Pestov for the jEdit installer project. This work
* has been placed into the public domain. You may use this work in any way and
* for any purpose you wish.
*
* THIS SOFTWARE IS PROVIDED AS-IS WITHOUT WARRANTY OF ANY KIND, NOT EVEN THE
* IMPLIED WARRANTY OF MERCHANTABILITY. THE AUTHOR OF THIS SOFTWARE, ASSUMES
* _NO_ RESPONSIBILITY FOR ANY CONSEQUENCE RESULTING FROM THE USE, MODIFICATION,
* OR REDISTRIBUTION OF THIS SOFTWARE.
*/
package installer;

import java.io.BufferedInputStream;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.IOException;
import java.util.Vector;

/*
* The thread that performs installation.
*/
public class InstallThread extends Thread
{
public InstallThread(Install installer, Progress progress,
  String installDir, OperatingSystem.OSTask[] osTasks,
  int size, Vector components)
{
  super("Install thread");

  this.installer = installer;
  this.progress = progress;
  this.installDir = installDir;
  this.osTasks = osTasks;
  this.size = size;
  this.components = components;
}

public void run()
{
  progress.setMaximum(size * 1024);

  //return value ignored : already signalled in ServerKiller
  progress.message("stopping any jEdit server");
  ServerKiller.quitjEditServer();

  try
  {
   // install user-selected packages
   for(int i = 0; i < components.size(); i++)
   {
    String comp = (String)components.elementAt(i);
    progress.message("Installing " + comp);
    installComponent(comp);
   }

   // do operating system specific stuff (creating startup
   // scripts, installing man pages, etc.)
   for(int i = 0; i < osTasks.length; i++)
   {
    progress.message("Performing task " +
     osTasks[i].getName());
    osTasks[i].perform(installDir,components);
   }
  }
  catch(FileNotFoundException fnf)
  {
   progress.error("The installer could not create the "
    + "destination directory.\n"
    + "Maybe you do not have write permission?");
   return;
  }
  catch(IOException io)
  {
   progress.error(io.toString());
   return;
  }

  progress.done();
}

// private members
private Install installer;
private Progress progress;
private String installDir;
private OperatingSystem.OSTask[] osTasks;
private int size;
private Vector components;

private void installComponent(String name) throws IOException
{
  InputStream in = new BufferedInputStream(
   getClass().getResourceAsStream(name + ".tar.bz2"));
  // skip header bytes
  // maybe should check if they're valid or not?
  in.read();
  in.read();

  TarInputStream tarInput = new TarInputStream(
   new CBZip2InputStream(in));
  TarEntry entry;
  String fileName = null;
  while((entry = tarInput.getNextEntry()) != null)
  {
   if(entry.isDirectory())
   {
    fileName = null;
    continue;
   }
   if (fileName == null)
   {
    fileName = entry.getName();
    if (fileName.equals("././@LongLink"))
    {
     fileName = new BufferedReader(new InputStreamReader(tarInput)).readLine();
     if(fileName == null)
     {
      // missing filename ??
      throw new IOException("Invalid or corrupt contents: file in tar with long filename but no filename found");
     }
     // bug #3837 - can't install because long file name ends with \0
     while(!fileName.isEmpty() && fileName.charAt(fileName.length()-1) == 0){
      fileName = fileName.substring(0, fileName.length()-1);
     }
     if(fileName.isEmpty())
     {
      // filename consists in '\0's ??
      throw new IOException("Invalid or corrupt contents: file in tar with long filename but empty filename found");
     }
     continue;
    }
   }
   //System.err.println(fileName);
   String outfile = installDir + File.separatorChar
    + fileName.replace('/',File.separatorChar);
   installer.copy(tarInput,outfile,progress);
   fileName = null;
  }

  tarInput.close();
}
}

¤ Dauer der Verarbeitung: 0.18 Sekunden (vorverarbeitet) ¤

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