package org.apache.maven.continuum.utils;
   
   /*
    * Licensed to the Apache Software Foundation (ASF) under one
    * or more contributor license agreements.  See the NOTICE file
    * distributed with this work for additional information
    * regarding copyright ownership.  The ASF licenses this file
    * to you 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.
   */
  
  import java.net.URI;
  import java.net.URISyntaxException;
  import java.util.Arrays;
  import java.util.HashSet;
  import java.util.Set;
  
  import org.apache.commons.lang.StringUtils;
  import org.codehaus.plexus.configuration.PlexusConfiguration;
  import org.codehaus.plexus.configuration.PlexusConfigurationException;
  import org.codehaus.plexus.personality.plexus.lifecycle.phase.Configurable;
  import org.springframework.stereotype.Service;
  
  /**
   * @author <a href="mailto:olamy@apache.org">olamy</a>
   * @since 27 mars 2008
   * @version $Id: ContinuumUrlValidator.java 729304 2008-12-24 12:53:52Z olamy $
   * @plexus.component role="org.apache.maven.continuum.utils.ContinuumUrlValidator"
   *   role-hint="continuumUrl"
   */
  @Service("continuumUrlValidator#continuumUrl")
  public class ContinuumUrlValidator
      implements Configurable
  {
      /**
       * The set of schemes that are allowed to be in a URL.
       */
      private Set<String> allowedSchemes = new HashSet<String>();
  
      /**
       * If no schemes are provided, default to this set.
       */
      protected String[] defaultSchemes = { "http", "https", "ftp" };
  
      /**
       * Create a UrlValidator with default properties.
       */
      public ContinuumUrlValidator()
      {
          this( null );
      }
  
      /**
       * Behavior of validation is modified by passing in several strings options:
       * @param schemes Pass in one or more url schemes to consider valid, passing in
       *        a null will default to "http,https,ftp" being valid.
       *        If a non-null schemes is specified then all valid schemes must
       *        be specified.
       */
      public ContinuumUrlValidator( String[] schemes )
      {
          if ( schemes == null && this.allowedSchemes.isEmpty() )
          {
              schemes = this.defaultSchemes;
          }
  
          this.allowedSchemes.addAll( Arrays.asList( schemes ) );
      }
  
      /**
       * <p>Checks if a field has a valid url address.</p>
       *
       * @param value The value validation is being performed on.  A <code>null</code>
       * value is considered invalid.
       * @return true if the url is valid.
       */
      public boolean validate( String value )
      {
          return isValid( value );
      }
  
      /**
       * <p>Checks if a field has a valid url address.</p>
       *
       * @param value The value validation is being performed on.  A <code>null</code>
       * value is considered valid.
       * @return true if the url is valid.
       */
      public boolean isValid( String value )
     {
         if ( StringUtils.isEmpty( value ) )
         {
             return true;
         }
 
         try
         {
             URI uri = new URI( value );
             return this.allowedSchemes.contains( uri.getScheme() );
         }
         catch ( URISyntaxException e )
         {
             return false;
         }
     }
 
     /**
      * @param url
      * @return URLUserInfo cannot be null
      * @throws URISyntaxException
      */
     public URLUserInfo extractURLUserInfo( String url )
         throws URISyntaxException
     {
         URI uri = new URI( url );
         // can contains user:password
         String userInfoRaw = uri.getUserInfo();
         URLUserInfo urlUserInfo = new URLUserInfo();
 
         if ( !StringUtils.isEmpty( userInfoRaw ) )
         {
             int index = userInfoRaw.indexOf( ':' );
             if ( index >= 0 )
             {
                 urlUserInfo.setUsername( userInfoRaw.substring( 0, index ) );
                 urlUserInfo.setPassword( userInfoRaw.substring( index + 1, userInfoRaw.length() ) );
             }
             else
             {
                 urlUserInfo.setUsername( userInfoRaw );
             }
         }
         return urlUserInfo;
     }
 
     public void configure( PlexusConfiguration plexusConfiguration )
         throws PlexusConfigurationException
     {
         PlexusConfiguration allowedSchemesElement = plexusConfiguration.getChild( "allowedSchemes" );
         if ( allowedSchemesElement != null )
         {
             PlexusConfiguration[] allowedSchemeElements = allowedSchemesElement.getChildren( "allowedScheme" );
             for ( int i = 0, size = allowedSchemeElements.length; i < size; i++ )
             {
                 this.allowedSchemes.add( allowedSchemeElements[i].getValue() );
             }
         }
     }
 
 }