package org.apache.maven.doxia.linkcheck.validation;

 /*

  * 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.util.Locale;

 /**

  * Checks links which are normal URLs.

  *

  * @author <a href="mailto:bwalding@apache.org">Ben Walding</a>

  * @author <a href="mailto:aheritier@apache.org">Arnaud Heritier</a>

  * @version $Id: HTTPLinkValidator.java 799838 2009-08-01 11:23:24Z vsiveton $

  */

 public abstract class HTTPLinkValidator

     implements LinkValidator

 {

     /** {@inheritDoc} */

     public Object getResourceKey( LinkValidationItem lvi )

     {

         String link = lvi.getLink();

         if ( !link.toLowerCase( Locale.ENGLISH ).startsWith( "http://" )

             && !link.toLowerCase( Locale.ENGLISH ).startsWith( "https://" ) && !link.startsWith( "/" ) )

         {

             return null;

         }

         int hashPos = link.indexOf( "#" );

         if ( hashPos != -1 )

         {

             link = link.substring( 0, hashPos );

         }

         return link;

     }

 }