package org.webslinger.commons.fileupload;

 import java.io.IOException;

 import java.util.ArrayList;

 import java.util.Enumeration;

 import java.util.HashMap;

 import java.util.List;

 import java.util.Map;

 import javax.servlet.http.HttpServletRequest;

 import org.apache.commons.fileupload.FileItem;

 import org.apache.commons.fileupload.FileItemFactory;

 import org.apache.commons.fileupload.FileUploadException;

 import org.apache.commons.fileupload.disk.DiskFileItemFactory;

 import org.apache.commons.fileupload.servlet.ServletFileUpload;

 import org.apache.commons.vfs.FileObject;

 import org.webslinger.io.Charsets;

 import org.webslinger.io.IOUtil;

 public class CommonsVfsFileItemFactory implements FileItemFactory {

     private final FileObject dir;

     private int count;

     public CommonsVfsFileItemFactory(FileObject dir) {

         this.dir = dir;

     }

     synchronized FileObject createFile(String contentType) throws IOException {

         while (true) {

             FileObject file = dir.resolveFile(Integer.toString(count++));

             if (!file.exists()) {

                 file.createFile();

                 file.getContent().setAttribute("content-type", contentType);

                 return file;

             }

         }

     }

     void removeFile(FileObject file) throws IOException {

         file.delete();

     }

     public FileItem createItem(String fieldName, final String contentType, boolean isFormField, String fileName) {

         FileItem item = new AbstractCommonsVfsFileItem(fileName) {

             private FileObject file;

             public synchronized FileObject getFile() throws IOException {

                 if (file != null) return file;

                 file = createFile(getContentType());

                 return file;

             }

             public synchronized void delete() {

                 if (file == null) return;

                 try {

                     file.delete();

                     removeFile(file);

                 } catch (IOException e) {

                     throw (IllegalArgumentException) new IllegalArgumentException(e.getMessage()).initCause(e);

                 }

                 file = null;

             }

             public String getContentType() {

                 return contentType;

             }

         };

         item.setFieldName(fieldName);

         item.setFormField(isFormField);

         return item;

     }

 }