Java EE (Java Enterprise Edition) General Discussion

Hi All,

I had hard time trying to find a send SOAP DIME attachment
code for the web service. And here it is, I wrote one,
but I use to easy way to deploy the service.
I just simply change the extension .java to .jws,
so, can you all tell me whether it will be a problem or not ?
And please review my code below, I debugged and no error,
but I am not sure if it is working right.

Basiclly 2 operations:
public String generateID(int artID)
public File detachFile(String filename)

Please comment on this code, I am trying to make it
more robust, so, that I can redo it and post it to share with
everybody.

thanks,

Derek

import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.Iterator;
import java.io.*;
import java.security.*;
import java.security.NoSuchAlgorithmException;

import javax.activation.DataHandler;
import javax.activation.FileDataSource;
import javax.xml.soap.AttachmentPart;

import org.apache.axis.AxisFault;
import org.apache.axis.Message;
import org.apache.axis.MessageContext;
import org.apache.axis.attachments.Attachments;
import org.apache.axis.attachments.AttachmentsImpl;
import org.apache.log4j.Logger;


public class AttachmentYPMG
{
	private static final Logger _logger = Logger.getLogger(AttachmentYPMG.class);

	public AttachmentYPMG()
	{
	}

	public String generateID(int artID)
	{
		String artid = Integer.toString(artID);
		String md5_hash_string = plainStringToMD5(artid);
		return md5_hash_string;
	} 
	 
	 
	private String plainStringToMD5(String input) {
  		// Some stuff we will use later
  		MessageDigest md = null;
  		byte[] byteHash = null;
  		StringBuffer resultString = new StringBuffer();

  		// Bad things can happen here
  		try {
   		 // Choose between MD5 and SHA1
   			 md = MessageDigest.getInstance("MD5");
  		} catch(NoSuchAlgorithmException e) {
      		System.out.println("NoSuchAlgorithmException caught!");
      		System.exit( -1);
  		}

  		// Reset is always good
  		md.reset();
		
  		// We really need some conversion here
 		 md.update(input.getBytes());

  		// There goes the hash
  		byteHash = md.digest();

 		 //  Now here comes the best part
  		for(int i = 0; i < byteHash.length; i++) {
    		resultString.append(Integer.toHexString(0xFF & byteHash));

		}



		// That's it!

		return(resultString.toString());

	}

	

	

	

	public File detachFile(String filename)

	{

		InputStream is = null;

		FileOutputStream os = null;

		File file = null;

		int totalAttachments ;

		

		try

		{

			//Get all the attachments

			AttachmentPart[] attachments = getMessageAttachments();



			/*

			* getMessageAttachments() as provided by Steve Loughran in his mail

			* to axis-user group

			* http://www.mail-archive.com/axis-user@xml.apache.org/msg08732.html

			*/



			//Put the logic in a loop for totalAttachments for multiple

			// attachments.

			totalAttachments = attachments.length;

			_logger.debug("saveFile(String filename = " + filename + ") - " +

						"Total Attachments Received Are: "+ totalAttachments);



		

			//Extract the first attachment. (Since in this case we have only one attachment sent)

			DataHandler dh = attachments[0].getDataHandler();



			//Extract the file name of the first attachment.

			String name = filename;

			_logger.debug("saveFile(String filename = " + filename + ") - File received on server is: " + name);

			

			//Get the streams to file and from attachment, then stream to disk

			is = dh.getInputStream();

			file = new File(name);

			os = new FileOutputStream(file);

			this.writeBuffersAndClose(is, os);



		} catch (Exception e)

		{

			_logger.error("detachFile(String filename = " + filename + ")", e);



			//throw new AttachmentException(e);

		}

		

		//if(file!= null)

		

				return file;

		

		//else 

			//throw new AttachmentException("The attachment was not saved");



	}



	/**

	* extract attachments from the current request

	* 

	* @return a list of attachmentparts or an empty array for no attachments

	* support in this axis buid/runtime

	*/

	private AttachmentPart[] getMessageAttachments() throws AxisFault

	{

		/*

		* Reusing the method implementation for AttachmentPart[]

		* getMessageAttachments() as provided by Steve Loughran in his mail to

		* axis-user group

		* http://www.mail-archive.com/axis-user@xml.apache.org/msg08732.html

		*/

		MessageContext msgContext = MessageContext.getCurrentContext();

		Message reqMsg = msgContext.getRequestMessage();

		Attachments messageAttachments = reqMsg.getAttachmentsImpl();

		if (null == messageAttachments)

		{

			System.out.println("no attachment support");

			return new AttachmentPart[0];

		}

		int attachmentCount = messageAttachments.getAttachmentCount();

		AttachmentPart attachments[] = new AttachmentPart[attachmentCount];

		Iterator it = messageAttachments.getAttachments().iterator();

		int count = 0;

		while (it.hasNext())

		{

			AttachmentPart part = (AttachmentPart) it.next();

			attachments[count++] = part;

		}

		return attachments;

	}



	

	/**

	* Simple method for writing one stream from another.

	* 

	* @param is

	* @param os

	* @throws IOException

	*/

	private void writeBuffersAndClose(InputStream is, OutputStream os) 

		throws IOException

	{

		int i = 0;

		byte [] buffer = new byte[1024];

		while (i != -1)

		{

			i = is.read(buffer, 0, buffer.length);

			if(i > 0)

				os.write(buffer, 0, buffer.length);

		}

		is.close();

		os.close();

	}

}