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JSR-000224: Java(TM) API for XML-Based Web Services 2.2

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/*
 * Copyright 2007 Sun Microsystems, Inc. All rights reserved.
 * SUN PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
 */

package javax.xml.ws;

import javax.xml.transform.Source;
import javax.xml.bind.JAXBContext;

/** The LogicalMessage interface represents a
 *  protocol agnostic XML message and contains methods that
 *  provide access to the payload of the message.
 *
 *  @since JAX-WS 2.0
**/
public interface LogicalMessage {

  /** Gets the message payload as an XML source, may be called
   *  multiple times on the same LogicalMessage instance, always
   *  returns a new Source that may be used to retrieve the entire
   *  message payload.
   *
   *  If the returned Source is an instance of 
   *  DOMSource, then
   *  modifications to the encapsulated DOM tree change the message
   *  payload in-place, there is no need to susequently call
   *  setPayload. Other types of Source provide only
   *  read access to the message payload.
   *
   *  @return The contained message payload; returns null if no 
   *          payload is present in this message.
  **/
  public Source getPayload();

  /** Sets the message payload
   *
   *  @param  payload message payload
   *  @throws WebServiceException If any error during the setting
   *          of the payload in this message
   *  @throws java.lang.UnsupportedOperationException If this
   *          operation is not supported
  **/
  public void setPayload(Source payload);

  /** Gets the message payload as a JAXB object. Note that there is no
   *  connection between the returned object and the message payload,
   *  changes to the payload require calling setPayload.
   *
   *  @param  context The JAXBContext that should be used to unmarshall
   *          the message payload
   *  @return The contained message payload; returns null if no 
   *          payload is present in this message
   *  @throws WebServiceException If an error occurs when using a supplied
   *     JAXBContext to unmarshall the payload. The cause of
   *     the WebServiceException is the original JAXBException.
  **/
  public Object getPayload(JAXBContext context);

  /** Sets the message payload
   *
   *  @param  payload message payload
   *  @param  context The JAXBContext that should be used to marshall 
   *          the payload
   *  @throws java.lang.UnsupportedOperationException If this
   *          operation is not supported
   *  @throws WebServiceException If an error occurs when using the supplied
   *     JAXBContext to marshall the payload. The cause of
   *     the WebServiceException is the original JAXBException.
  **/
  public void setPayload(Object payload, JAXBContext context);
}