/*
 * Copyright 2004 Sun Microsystems, Inc. All rights reserved.
 * SUN PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
 */

package javax.xml.ws.handler;
import java.util.Map;

/** The interface <code>MessageContext</code> abstracts the message
 *  context that is processed by a handler in the <code>handle</code>
 *  method. 
 *
 *  <p>The <code>MessageContext</code> interface provides methods to 
 *  manage a property set. <code>MessageContext</code> properties 
 *  enable handlers in a handler chain to share processing related
 *  state.
 * 
 *  @since JAX-WS 2.0
**/
public interface MessageContext extends Map<String, Object> {

  /** Standard property: message direction, <code>true</code> for
   *  outbound messages, <code>false</code> for inbound.
   *  <p>Type: boolean
  **/
  public static final String MESSAGE_OUTBOUND_PROPERTY = 
                      "javax.xml.ws.handler.message.outbound";

  /** Standard property: Map of attachments to a message for the inbound 
   * message, key is  the MIME Content-ID, value is a DataHandler.
   *  <p>Type: java.util.Map<String,DataHandler>
  **/
  public static final String INBOUND_MESSAGE_ATTACHMENTS = 
        "javax.xml.ws.binding.attachments.inbound";

  /** Standard property: Map of attachments to a message for the outbound 
   * message, key is the MIME Content-ID, value is a DataHandler.
   *  <p>Type: java.util.Map<String,DataHandler>
  **/
  public static final String OUTBOUND_MESSAGE_ATTACHMENTS = 
        "javax.xml.ws.binding.attachments.outbound";

  /** Standard property: input source for WSDL document.
   *  <p>Type: org.xml.sax.InputSource
  **/
  public static final String WSDL_DESCRIPTION = 
        "javax.xml.ws.wsdl.description";

  /** Standard property: name of WSDL service.
   *  <p>Type: javax.xml.namespace.QName
  **/
  public static final String WSDL_SERVICE = 
        "javax.xml.ws.wsdl.service";

  /** Standard property: name of WSDL port.
   *  <p>Type: javax.xml.namespace.QName
  **/
  public static final String WSDL_PORT = 
        "javax.xml.ws.wsdl.port";

  /** Standard property: name of wsdl interface (2.0) or port type (1.1).
   *  <p>Type: javax.xml.namespace.QName
  **/
  public static final String WSDL_INTERFACE = 
        "javax.xml.ws.wsdl.interface";

  /** Standard property: name of WSDL operation.
   *  <p>Type: javax.xml.namespace.QName
  **/
  public static final String WSDL_OPERATION =
        "javax.xml.ws.wsdl.operation";

  /** Standard property: HTTP response status code.
   *  <p>Type: java.lang.Integer
  **/
  public static final String HTTP_RESPONSE_CODE =
        "javax.xml.ws.http.response.code";

  /** Standard property: HTTP request headers.
   *  <p>Type: java.util.Map<java.lang.String, java.util.List<java.lang.String>>
  **/
  public static final String HTTP_REQUEST_HEADERS =
        "javax.xml.ws.http.request.headers";

  /** Standard property: HTTP response headers.
   *  <p>Type: java.util.Map<java.lang.String, java.util.List<java.lang.String>>
  **/
  public static final String HTTP_RESPONSE_HEADERS =
        "javax.xml.ws.http.response.headers";

  /** Standard property: HTTP request method.
   *  <p>Type: java.lang.String
  **/
  public static final String HTTP_REQUEST_METHOD =
        "javax.xml.ws.http.request.method";
  
  /** Standard property: servlet request object.
   *  <p>Type: javax.servlet.http.HttpServletRequest
  **/
  public static final String SERVLET_REQUEST =
        "javax.xml.ws.servlet.request";
  
  /** Standard property: servlet response object.
   *  <p>Type: javax.servlet.http.HttpServletResponse
  **/
  public static final String SERVLET_RESPONSE =
        "javax.xml.ws.servlet.response";
  
  /** Standard property: servlet context object.
   *  <p>Type: javax.servlet.ServletContext
  **/
  public static final String SERVLET_CONTEXT =
        "javax.xml.ws.servlet.context";
     
  /** Standard property: Query string for request.
   *  <p>Type: String
  **/
  public static final String QUERY_STRING =
        "javax.xml.ws.http.request.querystring";
     
  /** Standard property: Request Path Info
   *  <p>Type: String
  **/
  public static final String PATH_INFO =
        "javax.xml.ws.http.request.pathinfo";
     
  /**
   * Property scope. Properties scoped as <code>APPLICATION</code> are
   * visible to handlers, 
   * client applications and service endpoints; properties scoped as
   * <code>HANDLER</code>
   * are only normally visible to handlers.
  **/
  public enum Scope {APPLICATION, HANDLER};
    
  /** Sets the scope of a property.
   *
   *  @param name Name of the property associated with the 
   *              <code>MessageContext</code>
   *  @param scope Desired scope of the property
   *  @throws java.lang.IllegalArgumentException if an illegal
   *              property name is specified
   *             
  **/
  public void setScope(String name,  Scope scope);

  /** Gets the scope of a property.
   *
   *  @param name Name of the property
   *  @return Scope of the property
   *  @throws java.lang.IllegalArgumentException if a non-existant
   *              property name is specified
   *             
  **/
  public Scope getScope(String  name);
}