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.http.nio.entity;
29
30 import java.io.IOException;
31 import java.io.InputStream;
32
33 import org.apache.http.io.BufferInfo;
34 import org.apache.http.nio.util.ContentInputBuffer;
35 import org.apache.http.util.Args;
36
37 /**
38 * {@link InputStream} adaptor for {@link ContentInputBuffer}.
39 *
40 * @since 4.0
41 */
42 public class ContentInputStream extends InputStream {
43
44 private final ContentInputBuffer buffer;
45
46 public ContentInputStream(final ContentInputBuffer buffer) {
47 super();
48 Args.notNull(buffer, "Input buffer");
49 this.buffer = buffer;
50 }
51
52 @Override
53 public int available() throws IOException {
54 return this.buffer instanceof BufferInfo="../../../../../org/apache/http/nio/util/BufferInfo.html#BufferInfo">BufferInfo ? ((BufferInfo) this.buffer).length() : super.available();
55 }
56
57 @Override
58 public int read(final byte[] b, final int off, final int len) throws IOException {
59 return this.buffer.read(b, off, len);
60 }
61
62 @Override
63 public int read(final byte[] b) throws IOException {
64 if (b == null) {
65 return 0;
66 }
67 return this.buffer.read(b, 0, b.length);
68 }
69
70 @Override
71 public int read() throws IOException {
72 return this.buffer.read();
73 }
74
75 @Override
76 public void close() throws IOException {
77 // read and discard the remainder of the message
78 final byte tmp[] = new byte[1024];
79 while (this.buffer.read(tmp, 0, tmp.length) >= 0) {
80 }
81 super.close();
82 }
83
84 }