/*
 * Copyright 2003,2004 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.
 * 
 * ====================================================================
 *
 * 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();
}
