/*
 * The Apache Software License, Version 1.1
 *
 * Copyright (c) 2003 The Apache Software Foundation.  All rights 
 * reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer. 
 *
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 *
 * 3. The end-user documentation included with the redistribution, if
 *    any, must include the following acknowlegement:  
 *       "This product includes software developed by the 
 *        Apache Software Foundation (http://www.apache.org/)."
 *    Alternately, this acknowlegement may appear in the software itself,
 *    if and wherever such third-party acknowlegements normally appear.
 *
 * 4. The names "The Jakarta Project", "Pluto", and "Apache Software
 *    Foundation" must not be used to endorse or promote products derived
 *    from this software without prior written permission. For written 
 *    permission, please contact apache@apache.org.
 *
 * 5. Products derived from this software may not be called "Apache"
 *    nor may "Apache" appear in their names without prior written
 *    permission of the Apache Group.
 *
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED.  IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 * ====================================================================
 *
 * This software consists of voluntary contributions made by many
 * individuals on behalf of the Apache Software Foundation.  For more
 * information on the Apache Software Foundation, please see
 * <http://www.apache.org/>.
 *
 * ====================================================================
 *
 * This source code implements specifications defined by the Java
 * Community Process. In order to remain compliant with the specification
 * DO NOT add / change / or delete method signatures!
 */

package javax.portlet;



/**
 * The <CODE>PortalContext</CODE> interface gives the portlet
 * the ability to retrieve information about the portal calling this portlet.
 * <p>
 * The portlet can only read the <CODE>PortalContext</CODE> data.
 */
public interface PortalContext
{


  
  /**
   * Returns the portal property with the given name, 
   * or a <code>null</code> if there is 
   * no property by that name.
   *
   * @param  name    property name
   *
   * @return  portal property with key <code>name</code>
   *
   * @exception	java.lang.IllegalArgumentException	
   *                      if name is <code>null</code>.
   */

  public java.lang.String getProperty(java.lang.String name);


  /**
   * Returns all portal property names, or an empty 
   * <code>Enumeration</code> if there are no property names.
   *
   * @return  All portal property names as an 
   *          <code>Enumeration</code> of <code>String</code> objects
   */
  public java.util.Enumeration getPropertyNames();


  /**
   * Returns all supported portlet modes by the portal
   * as an enumertation of <code>PorltetMode</code> objects.
   * <p>
   * The portlet modes must at least include the
   * standard portlet modes <code>EDIT, HELP, VIEW</code>.
   *
   * @return  All supported portal modes by the portal
   *          as an enumertation of <code>PorltetMode</code> objects.
   */

  public java.util.Enumeration getSupportedPortletModes();


  /**
   * Returns all supported window states by the portal
   * as an enumertation of <code>WindowState</code> objects.
   * <p>
   * The window states must at least include the
   * standard window states <code> MINIMIZED, NORMAL, MAXIMIZED</code>.
   *
   * @return  All supported window states by the portal
   *          as an enumertation of <code>WindowState</code> objects.
   */

  public java.util.Enumeration getSupportedWindowStates();


  /**
   * Returns information about the portal like vendor, version, etc.
   * <p>
   * The form of the returned string is <I>servername/versionnumber</I>. For 
   * example, the reference implementation Pluto may return the string 
   * <CODE>Pluto/1.0</CODE>.
   * <p>
   * The portlet container may return other optional information  after the 
   * primary string in parentheses, for example, <CODE>Pluto/1.0 
   * (JDK 1.3.1; Windows NT 4.0 x86)</CODE>.
   * 
   * @return a <CODE>String</CODE> containing at least the portal name and version number
   */

  public java.lang.String getPortalInfo();
}