1 /*
2 * ====================================================================
3 * Licensed to the Apache Software Foundation (ASF) under one
4 * or more contributor license agreements. See the NOTICE file
5 * distributed with this work for additional information
6 * regarding copyright ownership. The ASF licenses this file
7 * to you under the Apache License, Version 2.0 (the
8 * "License"); you may not use this file except in compliance
9 * with the License. You may obtain a copy of the License at
10 *
11 * http://www.apache.org/licenses/LICENSE-2.0
12 *
13 * Unless required by applicable law or agreed to in writing,
14 * software distributed under the License is distributed on an
15 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
16 * KIND, either express or implied. See the License for the
17 * specific language governing permissions and limitations
18 * under the License.
19 * ====================================================================
20 *
21 * This software consists of voluntary contributions made by many
22 * individuals on behalf of the Apache Software Foundation. For more
23 * information on the Apache Software Foundation, please see
24 * <http://www.apache.org/>.
25 *
26 */
27
28 package org.apache.hc.core5.http.nio.support.classic;
29
30 import java.io.IOException;
31 import java.io.InputStream;
32
33 import org.apache.hc.core5.util.Args;
34
35 /**
36 * {@link InputStream} adaptor for {@link ContentInputBuffer}.
37 *
38 * @since 4.0
39 */
40 public class ContentInputStream extends InputStream {
41
42 private final ContentInputBuffer buffer;
43
44 public ContentInputStream(final ContentInputBuffer buffer) {
45 super();
46 Args.notNull(buffer, "Input buffer");
47 this.buffer = buffer;
48 }
49
50 @Override
51 public int available() throws IOException {
52 return this.buffer.length();
53 }
54
55 @Override
56 public int read(final byte[] b, final int off, final int len) throws IOException {
57 return this.buffer.read(b, off, len);
58 }
59
60 @Override
61 public int read(final byte[] b) throws IOException {
62 if (b == null) {
63 return 0;
64 }
65 return this.buffer.read(b, 0, b.length);
66 }
67
68 @Override
69 public int read() throws IOException {
70 return this.buffer.read();
71 }
72
73 @Override
74 public void close() throws IOException {
75 // read and discard the remainder of the message
76 final byte[] tmp = new byte[1024];
77 while (this.buffer.read(tmp, 0, tmp.length) >= 0) {
78 }
79 super.close();
80 }
81
82 }