/**
    * This file Copyright (c) 2003-2010 Magnolia International
    * Ltd.  (http://www.magnolia-cms.com). All rights reserved.
    *
    *
    * This file is dual-licensed under both the Magnolia
    * Network Agreement and the GNU General Public License.
    * You may elect to use one or the other of these licenses.
    *
   * This file is distributed in the hope that it will be
   * useful, but AS-IS and WITHOUT ANY WARRANTY; without even the
   * implied warranty of MERCHANTABILITY or FITNESS FOR A
   * PARTICULAR PURPOSE, TITLE, or NONINFRINGEMENT.
   * Redistribution, except as permitted by whichever of the GPL
   * or MNA you select, is prohibited.
   *
   * 1. For the GPL license (GPL), you can redistribute and/or
   * modify this file under the terms of the GNU General
   * Public License, Version 3, as published by the Free Software
   * Foundation.  You should have received a copy of the GNU
   * General Public License, Version 3 along with this program;
   * if not, write to the Free Software Foundation, Inc., 51
   * Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
   *
   * 2. For the Magnolia Network Agreement (MNA), this file
   * and the accompanying materials are made available under the
   * terms of the MNA which accompanies this distribution, and
   * is available at http://www.magnolia-cms.com/mna.html
   *
   * Any modifications to this file must keep this entire header
   * intact.
   *
   */
  package info.magnolia.cms.beans.config;
  
  import info.magnolia.link.Link;
  
  import info.magnolia.link.LinkFactory;
  import info.magnolia.link.LinkException;
  import info.magnolia.objectfactory.Components;
  
  import java.util.Collection;
  import java.util.Comparator;
  import java.util.TreeSet;
  
  import org.apache.commons.lang.StringUtils;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  
  /**
   * Maps uri prefixes to repositories.
   * 
   * @author Philipp Bracher
   * @version $Id: URI2RepositoryManager.java 36178 2010-08-03 16:34:52Z gjoseph $
   */
  public class URI2RepositoryManager {
  
      protected static final URI2RepositoryMapping DEFAULT_MAPPING = new URI2RepositoryMapping("", ContentRepository.WEBSITE,"");
  
      private static Logger log = LoggerFactory.getLogger(URI2RepositoryManager.class);
  
      /**
       * The mappings.
       */
      private Collection<URI2RepositoryMapping> mappings;
  
      public URI2RepositoryManager() {
          mappings = new TreeSet<URI2RepositoryMapping>(getMappingComparator());
      }
  
      protected Comparator<URI2RepositoryMapping> getMappingComparator() {
          return new Comparator<URI2RepositoryMapping>() {
              public int compare(URI2RepositoryMapping m0, URI2RepositoryMapping m1) {
                  return m1.getURIPrefix().compareTo(m0.getURIPrefix());
              }
          };
      }
  
      /**
       * The mapping to use for this uri.
       */
      public URI2RepositoryMapping getMapping(String uri) {
          for (URI2RepositoryMapping mapping : mappings) {
              if (mapping.matches(uri)) {
                  return mapping;
              }
          }
          return this.getDefaultMapping();
      }
  
      public URI2RepositoryMapping getDefaultMapping() {
          return DEFAULT_MAPPING;
      }
  
      /**
       * Get the handle for this uri.
       */
      public String getHandle(String uri) {
         return this.getMapping(uri).getHandle(uri);
     }
 
     /**
      * Get the repository to use for this uri.
      */
     public String getRepository(String uri) {
         return this.getMapping(uri).getRepository();
     }
 
     /**
      * Get the uri to use for this handle.
      */
     public String getURI(String repository, String handle) {
         try {
             return getURI(LinkFactory.createLink(repository, handle, null, null, null));
         }
         catch (LinkException e) {
             log.error("can't map [" + handle + "] to a uri", e);
         }
         return handle;
     }
 
     public String getURI(Link uuidLink) {
         for (URI2RepositoryMapping mapping : mappings) {
             if (StringUtils.equals(mapping.getRepository(), uuidLink.getRepository()) && uuidLink.getHandle().startsWith(mapping.getHandlePrefix())) {
                 return mapping.getURI(uuidLink);
             }
         }
         return this.getDefaultMapping().getURI(uuidLink);
     }
 
     public void addMapping(URI2RepositoryMapping mapping) {
         mappings.add(mapping);
     }
 
     public static URI2RepositoryManager getInstance() {
         return Components.getSingleton(URI2RepositoryManager.class);
     }
 
     /**
      * @return the mappings
      */
     public Collection<URI2RepositoryMapping> getMappings() {
         return this.mappings;
     }
 
 }