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   *   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
   *
   *    https://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
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   *  specific language governing permissions and limitations
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   ****************************************************************/
  package org.apache.cayenne.resource;
  
  import java.net.MalformedURLException;
  import java.net.URL;
  
  import org.apache.cayenne.CayenneRuntimeException;
  
  /**
   * A {@link Resource} implementation wrapping a resource URL.
   * 
   * @since 3.1
   */
  public class URLResource implements Resource {
  
      private URL url;
  
      public URLResource(URL url) {
          this.url = url;
      }
  
      public Resource getRelativeResource(String relativePath) {
          try {
              return new URLResource(new URL(url, relativePath));
          }
          catch (MalformedURLException e) {
              throw new CayenneRuntimeException(
                      "Error creating relative resource '%s' : '%s'",
                      e,
                      url,
                      relativePath);
          }
      }
  
      public URL getURL() {
          return url;
      }
      
      @Override
      public String toString() {
          String urlString = String.valueOf(url);
          return "<URLResource: " + urlString + ">";
      }
  
  }
  