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/*
* @(#)MessageTransformer.java 1.9 07/02/07
*/
package com.sun.messaging.xml;
import java.util.*;
import java.io.*;
import javax.jms.Message;
import javax.jms.BytesMessage;
import javax.jms.Session;
import javax.jms.JMSException;
import javax.xml.messaging.*;
import javax.xml.soap.*;
/**
* The <code>Transformer</code> class encapsulates the functionality
* to transform SOAP and JMS messages.
*/
public class MessageTransformer {
/** Private Constructor */
private MessageTransformer() {}
/**
* Transforms a <code>javax.xml.soap.SOAPMessage</code> message
* into a <code>javax.jms.Message</code> message.
*
* @param soapMessage the SOAPMessage to be converted to the JMS Message.
* @param session The JMS Session to be used to construct the JMS Message.
*
* @exception JAXMException If any error is encountered when transforming the message.
*/
public static Message
SOAPMessageIntoJMSMessage (SOAPMessage soapMessage, Session session) throws JAXMException {
try {
/**
* Construct a bytes message object.
* This is to make sure the utility works across all vendors.
*/
BytesMessage bmessage = session.createBytesMessage();
/**
* This is here to make sure that RI's bad SOAP implementation
* will get updated for internal buffers.
*/
soapMessage.saveChanges();
/**
* Write SOAP MIME headers.
*/
writeMimeHeaders (soapMessage, bmessage);
/**
* write message body to byte array output stream.
*/
writeSOAPBody (soapMessage, bmessage);
return bmessage;
} catch (JAXMException JAXMe) {
throw JAXMe;
} catch (Exception e) {
e.printStackTrace();
throw new JAXMException (e);
}
}
/**
* Extracts a <code>javax.xml.soap.SOAPMessage</code> object from the
* <code>javax.jms.Message</code> object into which it was transformed
* using the <code>SOAPMessageIntoJMSMessage</code> method.
*
* The <code>MessageFactory</code> parameter is used to construct the
* <code>javax.xml.soap.SOAPMessage</code> object.
* <p>
* If <code>MessageFactory</code> is <code>null</code> then the
* default SOAP MessageFactory will be used to construct the
* SOAP message.
*
* @param message The JMS message from which the SOAP message is to be extracted.
* @param messageFactory The SOAP MessageFactory to be used to contruct the SOAP message.
*
* @exception JAXMException If any error is encountered when extracting the message.
*/
public static SOAPMessage
SOAPMessageFromJMSMessage(Message message, MessageFactory messageFactory)
throws JAXMException {
SOAPMessage soapMessage = null;
BytesMessage bmessage = (BytesMessage) message;
try {
//1. construct mime header
int mimeLength = bmessage.readInt();
byte[] mbuf = new byte [mimeLength];
bmessage.readBytes(mbuf, mimeLength);
ByteArrayInputStream mbin = new ByteArrayInputStream (mbuf);
ObjectInputStream oi = new ObjectInputStream (mbin);
Hashtable ht = (Hashtable) oi.readObject();
MimeHeaders mimeHeaders = hashtableToMime (ht);
//2. get soap body stream.
int bodyLength = bmessage.readInt();
byte[] buf = new byte [bodyLength];
bmessage.readBytes(buf, bodyLength);
ByteArrayInputStream bin = new ByteArrayInputStream (buf);
if ( messageFactory == null ) {
messageFactory = getMessageFactory ();
}
//3. construct soap message object.
soapMessage = messageFactory.createMessage(mimeHeaders, bin );
}catch (Exception e) {
throw new JAXMException (e);
}
return soapMessage;
}
/**
* Write MIME headers to JMS message body.
*/
private static void
writeMimeHeaders (SOAPMessage soapMessage, BytesMessage bmessage)
throws Exception {
/**
* Convert JAXM MIME headers to Hashtable
*/
MimeHeaders mimeHeaders = soapMessage.getMimeHeaders();
Hashtable hashtable = MimeToHashtable (mimeHeaders);
/**
* Write hashtable to object output stream
*/
ByteArrayOutputStream mimeOut = new ByteArrayOutputStream();
ObjectOutputStream oo = new ObjectOutputStream (mimeOut);
oo.writeObject( hashtable );
oo.flush();
oo.close();
/**
* convert mime output stream to byte array.
*/
byte[] mimebuf = mimeOut.toByteArray();
/**
* Write buffer length to JMS bytes message.
*/
bmessage.writeInt(mimebuf.length);
/**
* Write header byte[] to JMS bytes message.
*/
bmessage.writeBytes( mimebuf );
/**
* Close streams.
*/
mimeOut.close();
//System.out.println ("SOAP to JMS mime length: " + mimebuf.length);
}
/**
* Write SOAP message body to JMS bytes message.
*/
private static void
writeSOAPBody (SOAPMessage soapMessage, BytesMessage bmessage) throws Exception {
ByteArrayOutputStream bodyOut = new ByteArrayOutputStream();
soapMessage.writeTo(bodyOut);
/**
* Convert byte array output stream to byte[].
*/
byte[] buf = bodyOut.toByteArray();
/**
* Write message body byte[] length.
*/
bmessage.writeInt(buf.length);
/**
* Write message body byte[] buffer.
*/
bmessage.writeBytes(buf);
bodyOut.close();
//System.out.println ("SOAP to JMS body length: " + buf.length);
}
/**
* Convert MimeHeaders to Hashtable. The hashtable is then used to write
* to JMS BytesMessage.
*/
private static Hashtable
MimeToHashtable ( MimeHeaders mimeHeaders ) {
Hashtable hashtable = new Hashtable();
Iterator it = mimeHeaders.getAllHeaders();
while ( it.hasNext() ) {
MimeHeader mh = (MimeHeader) it.next();
hashtable.put(mh.getName(), mh.getValue());
//System.out.println("name: " + mh.getName() + " Val: " + mh.getValue());
}
return hashtable;
}
/**
* Convert Hashtable to MimeHeaders. Used when converting from JMS
* to SOAP messages.
*/
private static MimeHeaders
hashtableToMime (Hashtable hashtable) {
MimeHeaders mimeHeaders = new MimeHeaders();
Enumeration enm = hashtable.keys();
while ( enm.hasMoreElements() ) {
Object key = enm.nextElement();
mimeHeaders.addHeader((String)key, (String)hashtable.get(key));
}
return mimeHeaders;
}
/**
* Get SOAP message factory from JMS message.
* @param message JMS message.
*/
private static MessageFactory
getMessageFactory () throws SOAPException {
return MessageFactory.newInstance();
}
}