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/*
 * Copyright 2001-2004 The Apache Software Foundation.
 * 
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 *      http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package javax.xml.rpc.server;

import java.security.Principal;

import javax.servlet.ServletContext;
import javax.servlet.http.HttpSession;
import javax.xml.rpc.handler.MessageContext;

/**
 * The <code>ServletEndpointContext</code> provides an endpoint context
 * maintained by the underlying servlet container based JAX-RPC runtime system.
 * For service endpoints deployed on a servlet container based JAX-RPC runtime
 * system, the context parameter in the <code>ServiceLifecycle.init</code>
 * method is required to be of the Java type
 * <code>javax.xml.rpc.server.ServletEndpointContext</code>.
 * <p>
 * A servlet container based JAX-RPC runtime system implements the
 * <code>ServletEndpointContext</code> interface. The JAX-RPC runtime system is
 * required to provide appropriate session, message context, servlet context and
 * user principal information per method invocation on the endpoint class.
 * 
 * @version 1.0
 */
public interface ServletEndpointContext {

  /**
   * The method <code>getMessageContext</code> returns the
   * <code>MessageContext</code> targeted for this endpoint instance. This
   * enables the service endpoint instance to acccess the
   * <code>MessageContext</code> propagated by request
   * <code>HandlerChain</code> (and its contained <code>Handler</code>
   * instances) to the target endpoint instance and to share any SOAP message
   * processing related context. The endpoint instance can access and
   * manipulate the <code>MessageContext</code> and share the SOAP message
   * processing related context with the response <code>HandlerChain</code>.
   * 
   * @return MessageContext; If there is no associated
   *         <code>MessageContext</code>, this method returns
   *         <code>null</code>.
   * @throws java.lang.IllegalStateException
   *             if this method is invoked outside a remote method
   *             implementation by a service endpoint instance.
   */
  public MessageContext getMessageContext();

  /**
   * Returns a <code>java.security.Principal</code> instance that contains the
   * name of the authenticated user for the current method invocation on the
   * endpoint instance. This method returns <code>null</code> if there is no
   * associated principal yet. The underlying JAX-RPC runtime system takes the
   * responsibility of providing the appropriate authenticated principal for a
   * remote method invocation on the service endpoint instance.
   * 
   * @return A <code>java.security.Principal</code> for the authenticated
   *         principal associated with the current invocation on the servlet
   *         endpoint instance; Returns <code>null</code> if there no
   *         authenticated user associated with a method invocation.
   */
  public Principal getUserPrincipal();

  /**
   * The <code>getHttpSession</code> method returns the current HTTP session
   * (as a <code>javax.servlet.http.HTTPSession</code>). When invoked by the
   * service endpoint within a remote method implementation, the
   * <code>getHttpSession</code> returns the HTTP session associated currently
   * with this method invocation. This method returns <code>null</code> if
   * there is no HTTP session currently active and associated with this
   * service endpoint. An endpoint class should not rely on an active HTTP
   * session being always there; the underlying JAX-RPC runtime system is
   * responsible for managing whether or not there is an active HTTP session.
   * <p>
   * The getHttpSession method throws <code>JAXRPCException</code> if invoked
   * by an non HTTP bound endpoint.
   * 
   * @return The HTTP session associated with the current invocation or
   *         <code>null</code> if there is no active session.
   * @throws javax.xml.rpc.JAXRPCException
   *             - If this method invoked by a non-HTTP bound endpoints.
   */
  public HttpSession getHttpSession();

  /**
   * The method <code>getServletContext</code> returns the
   * <code>ServletContex</code>t associated with the web application that
   * contain this endpoint. According to the Servlet specification, There is
   * one context per web application (installed as a WAR) per JVM . A servlet
   * based service endpoint is deployed as part of a web application.
   * 
   * @return the current <code>ServletContext</code>
   */
  public ServletContext getServletContext();

  public boolean isUserInRole(java.lang.String s);
}
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