/* Copyright 2004, 2005, 2006 Acegi Technology Pty Limited

  *

  * 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 org.acegisecurity.util;

 import org.springframework.util.Assert;

 import java.util.HashMap;

 import java.util.Iterator;

 import java.util.Map;

 /**

  * Concrete implementation of {@link PortMapper} that obtains HTTP:HTTPS pairs from the application context.<P>By

  * default the implementation will assume 80:443 and 8080:8443 are HTTP:HTTPS pairs respectively. If different pairs

  * are required, use {@link #setPortMappings(Map)}.</p>

  *

  * @author Ben Alex

  * @author colin sampaleanu

  * @version $Id: PortMapperImpl.java 1496 2006-05-23 13:38:33Z benalex $

  */

 public class PortMapperImpl implements PortMapper {

     //~ Instance fields ================================================================================================

     private Map httpsPortMappings;

     //~ Constructors ===================================================================================================

     public PortMapperImpl() {

         httpsPortMappings = new HashMap();

         httpsPortMappings.put(new Integer(80), new Integer(443));

         httpsPortMappings.put(new Integer(8080), new Integer(8443));

     }

     //~ Methods ========================================================================================================

     /**

      * Returns the translated (Integer -> Integer) version of the original port mapping specified via

      * setHttpsPortMapping()

      *

      * @return DOCUMENT ME!

      */

     public Map getTranslatedPortMappings() {

         return httpsPortMappings;

     }

     public Integer lookupHttpPort(Integer httpsPort) {

         Iterator iter = httpsPortMappings.keySet().iterator();

         while (iter.hasNext()) {

             Integer httpPort = (Integer) iter.next();

             if (httpsPortMappings.get(httpPort).equals(httpsPort)) {

                 return httpPort;

             }

         }

         return null;

     }

     public Integer lookupHttpsPort(Integer httpPort) {

         return (Integer) httpsPortMappings.get(httpPort);

     }

     /**

      * <p>Set to override the default HTTP port to HTTPS port mappings of 80:443, and  8080:8443.</p>

      *  In a Spring XML ApplicationContext, a definition would look something like this:<pre>

      *   <property name="portMappings">    <map>      <entry key="80"><value>443</value></entry>

      *       &lt;entry key="8080">&lt;value>8443&lt;/value>&lt;/entry>    &lt;/map>  &lt;/property></pre>

      *

      * @param newMappings A Map consisting of String keys and String values, where for each entry the key is the string

      *        representation of an integer HTTP port number, and the value is the string representation of the

      *        corresponding integer HTTPS port number.

      *

      * @throws IllegalArgumentException if input map does not consist of String keys and values, each representing an

      *         integer port number in the range 1-65535 for that mapping.

      */

     public void setPortMappings(Map newMappings) {

         Assert.notNull(newMappings, "A valid list of HTTPS port mappings must be provided");

         httpsPortMappings.clear();

         Iterator it = newMappings.entrySet().iterator();

         while (it.hasNext()) {

             Map.Entry entry = (Map.Entry) it.next();

             Integer httpPort = new Integer((String) entry.getKey());

             Integer httpsPort = new Integer((String) entry.getValue());

             if ((httpPort.intValue() < 1) || (httpPort.intValue() > 65535) || (httpsPort.intValue() < 1)

                 || (httpsPort.intValue() > 65535)) {

                 throw new IllegalArgumentException("one or both ports out of legal range: " + httpPort + ", "

                     + httpsPort);

             }

             httpsPortMappings.put(httpPort, httpsPort);

         }

         if (httpsPortMappings.size() < 1) {

             throw new IllegalArgumentException("must map at least one port");

         }

     }

 }