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 * obtain a copy of the License at
 * https://glassfish.dev.java.net/public/CDDL+GPL_1_1.html
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 * file and include the License file at packager/legal/LICENSE.txt.
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/* Byron Nevins, April 2000
 * ZipFile -- A utility class for exploding jar files that contain EJB(s).  Used *only* in this package by the EJBImporter class
 */

package com.sun.enterprise.util.zip;

import java.io.*;
import java.util.ArrayList;
import java.util.List;
import java.util.logging.*;
import java.util.zip.*;

import com.sun.enterprise.util.io.FileListerRelative;

public class ZipWriter
{
    public ZipWriter(String zipFilename, String dirName) throws ZipFileException
    {
        init(zipFilename, dirName);
        createItemList(null);
    }

    ///////////////////////////////////////////////////////////////////////////////////////////////////////
    
    public ZipWriter(String zipFilename, String dirName, ZipItem[] theItems) throws ZipFileException
    {
        items = theItems;
        init(zipFilename, dirName);
    }

    ///////////////////////////////////////////////////////////////////////////////////////////////////////
    
    public ZipWriter(String zipFilename, String dirName, String[] fileList) throws ZipFileException
    {
        init(zipFilename, dirName);
        createItemList(fileList);
    }

    ///////////////////////////////////////////////////////////////////////////////////////////////////////
    
    public ZipWriter(OutputStream outStream, String dirName, String[] fileList) throws ZipFileException
    {
        init(outStream, dirName);
        createItemList(fileList);
    }

    /**
     * Exclude any files that are under these directories.
     * E.g. suppose you have C:/temp/x1, C:/temp/x2 and C:/temp/x3
     * and the root is set to c:temp.  Thhen to exclude the contents of the second
     * 2 dirs you would send in a String array with "x2" and "x3"
     * @param dirs an array of top-level directory names
     */

    public void excludeDirs(String[] dirs) {
        // make sure the names all end with "/"
        for(int i = 0; i < dirs.length; i++) {
            if(!dirs[i].endsWith("/"))
                dirs[i] += "/";
        }

        // copy all the items we will retain into list
        List<ZipItem> list = new ArrayList<ZipItem>(items.length);

        for(int i = 0; i < items.length; i++) {
            boolean exclude = false;

            for(int j = 0; j < dirs.length; j++) {
                if(items[i].name.startsWith(dirs[j]))
                    exclude = true;
            }
            if (!exclude) {
                list.add(items[i]);
            }
        }

        // reset items to the pruned list
        if(list.size() != items.length) {
            items = new ZipItem[list.size()];
            items = list.toArray(items);
        }
    }
    

    //////////////////////////////////////////////////////////////////////////////////////////////////////////////

    private void init(String outFileName, String dirName) throws ZipFileException
    {
        try
        {
            init(new FileOutputStream(outFileName), dirName);
        }
        catch(Exception e)
        {
            throw new ZipFileException(e);
        }
    }

    //////////////////////////////////////////////////////////////////////////////////////////////////////////////

    private void init(OutputStream outStream, String dirName) throws ZipFileException
    {
        try
        {
            if(dirName == null)
                throw new IllegalArgumentException("null dirName");
            
            //make sure it's really a directory
            File f = new File(dirName);

            if(!f.exists())
                throw new ZipFileException("directory (" + dirName + ") doesn't exist");

            if(!f.isDirectory())
                throw new ZipFileException(dirName + " is not a directory");
            
            // change the filename to be full-path & UNIX style
            try
            {
                dirName = f.getCanonicalPath();
            }
            catch(IOException e)
            {
                dirName = f.getAbsolutePath();
            }
            
            dirName = dirName.replace('\\', '/');    // all UNIX-style filenames...
            
            
            // we need the dirname to end in a '/'
            if(!dirName.endsWith("/"))
                dirName += "/";

            
            this.dirName        = dirName;
            zipStream            = new ZipOutputStream(outStream);
        }
        catch(ZipFileException zfe) 
        {
            throw zfe;
        }
        catch(Throwable t)
        {
            throw new ZipFileException(t);
        }
    }

    //////////////////////////////////////////////////////////////////////////////////////////////////////////////

    /**
     * Does not throw an exception when there is a duplicate zip entry.
     *
     * @throws  ZipFileException   if an error while creating the archive
     */
    public void safeWrite()  throws ZipFileException
    {
        try
        {
            for(int i = 0; i < items.length; i++)
            {
                try 
                {
                    addEntry(items[i]);
                } 
                catch (ZipException e) 
                {
                    // ignore - duplicate zip entry
                }
            }
            
            zipStream.close();
        }
        catch(ZipFileException z)
        {
            throw z;
        }
        catch(Exception e)
        {
            throw new ZipFileException(e);
        }
    }

    //////////////////////////////////////////////////////////////////////////////////////////////////////////////
    
    public void write()  throws ZipFileException
    {
        try
        {
            for(int i = 0; i < items.length; i++)
            {
                addEntry(items[i]);
            }
            
            zipStream.close();
        }
        catch(ZipFileException z)
        {
            throw z;
        }
        catch(Exception e)
        {
            throw new ZipFileException(e);
        }
    }

    //////////////////////////////////////////////////////////////////////////////////////////////////////////////
    
    private void addEntry(ZipItem item)  throws ZipFileException, IOException
    {
        int                    totalBytes    = 0;
        ZipEntry            ze            = new ZipEntry(item.name);
        
        zipStream.putNextEntry(ze);
        if(!item.name.endsWith("/"))
        {
            FileInputStream        in            = new FileInputStream(item.file);

            for(int numBytes = in.read(buffer); numBytes > 0; numBytes = in.read(buffer))
            {
                zipStream.write(buffer, 0, numBytes);
                totalBytes += numBytes;
            }

            in.close();
        }
        
        zipStream.closeEntry();
        Logger.getAnonymousLogger().finer("Wrote " + item.name + " to Zip File.  Wrote " + totalBytes + " bytes.");
    }        

    //////////////////////////////////////////////////////////////////////////////////////////////////////////////
    
    private void createItemList(String[] files) throws ZipFileException
    {
        try
        {
            if(files == null)
            {
                FileListerRelative lister = new FileListerRelative(new File(dirName));
                files = lister.getFiles();
            }

            if(files.length <= 0)
                throw new ZipFileException("No files to add!");

            items = new ZipItem[files.length];

            for(int i = 0; i < files.length; i++)
            {
                File f = new File(dirName + files[i]);
                items[i] = new ZipItem(f, files[i].replace('\\', '/'));    // just in case...
                
                // bnevins -- add a trailing "/" to empty directories
                if(f.isDirectory())
                    items[i].name += "/";                
            }
        }
        catch(Throwable t)
        {
            throw new ZipFileException(t);
        }
            
    }

    //////////////////////////////////////////////////////////////////////////////////////////////////////////////
    
    String getDirName()
    {
        return dirName;
    }
        
    //////////////////////////////////////////////////////////////////////////////////////////////////////////////
    
    private static void usage()
    {
        System.out.println("usage: java com.elf.util.zip.ZipWriter zip-filename directory-name");
        System.exit(1);
    }
        
    //////////////////////////////////////////////////////////////////////////////////////////////////////////////
    
    public static void main(String[] args)
    {
        if(args == null || args.length != 2)
            usage();
        
        try
        {
            ZipWriter zw = new ZipWriter(args[0], args[1]);
            zw.write();
        }
        catch(ZipFileException e)
        {
            System.exit(0);
        }
    }

    /////////////////////////////////////////////////////////////////////////////////////////

    //private                    String            zipFilename        = null;
    private                    String            dirName            = null;
    private                    ZipOutputStream zipStream        = null;
    private                    byte[]            buffer            = new byte[16384];
    private                    ZipItem[]        items            = null;
}