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1   /*
2    * Licensed to the Apache Software Foundation (ASF) under one
3    * or more contributor license agreements.  See the NOTICE file
4    * distributed with this work for additional information
5    * regarding copyright ownership.  The ASF licenses this file
6    * to you under the Apache License, Version 2.0 (the
7    * "License"); you may not use this file except in compliance
8    * with the License.  You may obtain a copy of the License at
9    *
10   *   http://www.apache.org/licenses/LICENSE-2.0
11   *
12   * Unless required by applicable law or agreed to in writing,
13   * software distributed under the License is distributed on an
14   * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
15   * KIND, either express or implied.  See the License for the
16   * specific language governing permissions and limitations
17   * under the License.
18   */
19  package org.apache.maven.index.reader.resource;
20  
21  import java.io.FileNotFoundException;
22  import java.io.IOException;
23  import java.io.InputStream;
24  import java.net.URL;
25  import java.util.Objects;
26  
27  import org.apache.maven.index.reader.ResourceHandler.Resource;
28  
29  /**
30   * A {@link Resource} that represents a {@link URL}.
31   */
32  public class UrlResource implements Resource {
33      private final URL url;
34  
35      public UrlResource(URL url) {
36          Objects.requireNonNull(url, "url cannot be null");
37          this.url = url;
38      }
39  
40      @Override
41      public InputStream read() throws IOException {
42          try {
43              return url.openStream();
44          } catch (FileNotFoundException e) {
45              return null;
46          }
47      }
48  }