/*
    * Copyright (c) 2003, Henri Yandell
    * All rights reserved.
    * 
    * Redistribution and use in source and binary forms, with or 
    * without modification, are permitted provided that the 
    * following conditions are met:
    * 
    * + Redistributions of source code must retain the above copyright notice, 
   *   this list of conditions and the following disclaimer.
   * 
   * + Redistributions in binary form must reproduce the above copyright notice, 
   *   this list of conditions and the following disclaimer in the documentation 
   *   and/or other materials provided with the distribution.
   * 
   * + Neither the name of Genjava-Core nor the names of its contributors 
   *   may be used to endorse or promote products derived from this software 
   *   without specific prior written permission.
   * 
   * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 
   * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 
   * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 
   * ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE 
   * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 
   * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 
   * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 
   * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 
   * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 
   * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 
   * POSSIBILITY OF SUCH DAMAGE.
   */
  // @file   ZipFinder.java
  // @author bayard@generationjava.com
  // @create 2000-11-18
  // @modify 2001-05-27
  
  package com.generationjava.io.find;
  
  import java.io.File;
  import java.util.List;
  import java.util.ArrayList;
  import java.util.LinkedList;
  import java.util.Iterator;
  import java.util.Enumeration;
  import java.util.Map;
  import java.util.zip.ZipFile;
  import java.util.zip.ZipEntry;  
  import java.util.zip.ZipException;  
  import java.io.IOException;
  
  /***
   * A Finder which finds files inside a Zip file.
   * Will also work for jar files.
   */
  public class ZipFinder implements Finder {
  
      private List findListeners;
  
      public File[] find(File zip) {
          return find(zip, new java.util.HashMap());
      }
  
      public File[] find(File zipfile, Map options) {
          String extension = null;
          if(options.containsKey(Finder.NAME)) {
              extension = options.get(Finder.NAME).toString();
          }
          List retlist = new ArrayList();
  
          try {
              ZipFile zip = new ZipFile(zipfile);
              Enumeration enum = zip.entries();
              while(enum.hasMoreElements()) {
                  ZipEntry entry = (ZipEntry)enum.nextElement();
                  if(extension != null) {
                      if(entry.getName().endsWith(extension)) {
                          addFile(retlist, entry.getName());
                      }
                  } else {
                      addFile(retlist, entry.getName());
                  }
              }
          } catch(ZipException ze) {
              throw new FinderException(ze);
          } catch(IOException ioe) {
              throw new FinderException(ioe);
          }
  
          return (File[]) retlist.toArray(new File[0]);
      }
  
      private void addFile(List list, String file) {
          if(file.endsWith("/")) {
              // directory
              file = file.substring(0, file.length() - 1);
              int idx = file.lastIndexOf("/");
              if(idx != -1) {
                  file = file.substring(idx+1);
              }
             return;
         }
 
         int idx = file.lastIndexOf("/");
         String directory = "";
         if(idx != -1) {
             directory = file.substring(0,idx);
             file = file.substring(idx+1);
         }
         notifyFileFound(new File(directory), new File(directory, file));
         list.add(file);
     }
     
     public void addFindListener(FindListener fl) {
         if(findListeners == null) {
             findListeners = new LinkedList();
         }
         findListeners.add(fl);
     }
 
     public void removeFindListener(FindListener fl) {
         if(findListeners != null) {
             findListeners.remove(fl);
         }
     }
 
     public void notifyDirectoryStarted(File directory) {
         if(findListeners != null) {
             FindEvent fe = new FindEvent(this,"directoryStarted",directory);
             Iterator itr = findListeners.iterator();
             while(itr.hasNext()) {
                 FindListener findListener = (FindListener)itr.next();
                 findListener.directoryStarted( fe );
             }
         }
     }
 
     public void notifyDirectoryFinished(File directory, File[] files) {
         if(findListeners != null) {
             FindEvent fe = new FindEvent(this,"directoryFinished",directory,files);
             Iterator itr = findListeners.iterator();
             while(itr.hasNext()) {
                 FindListener findListener = (FindListener)itr.next();
                 findListener.directoryFinished( fe );
             }
         }
     }
 
     public void notifyFileFound(File directory, File file) {
         if(findListeners != null) {
             FindEvent fe = new FindEvent(this,"fileFound",directory,file);
             Iterator itr = findListeners.iterator();
             while(itr.hasNext()) {
                 FindListener findListener = (FindListener)itr.next();
                 findListener.fileFound( fe );
             }
         }
     }
     
 }