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.BufferedInputStream;
22 import java.io.IOException;
23 import java.io.InputStream;
24
25 import org.apache.maven.index.reader.ResourceHandler.Resource;
26
27 import static java.util.Objects.requireNonNull;
28
29 /**
30 * Wraps {@link Resource}s so that they return {@link BufferedInputStream}s.
31 */
32 public class BufferedResource implements Resource {
33 private final Resource resource;
34
35 public BufferedResource(Resource resource) {
36 requireNonNull(resource, "resource cannot be null");
37 this.resource = resource;
38 }
39
40 @Override
41 public InputStream read() throws IOException {
42 InputStream in = resource.read();
43 if (in == null) {
44 return null;
45 }
46 return new BufferedInputStream(in);
47 }
48
49 @Override
50 public void close() throws IOException {
51 resource.close();
52 }
53 }