Source code: org/apache/http/io/HttpDataInputStream.java
1 /*
2 * $HeadURL: https://svn.apache.org/repos/asf/jakarta/httpcomponents/httpcore/tags/4.0-alpha2/src/java/org/apache/http/io/HttpDataInputStream.java $
3 * $Revision: 376961 $
4 * $Date: 2006-02-11 11:32:50 +0100 (Sat, 11 Feb 2006) $
5 *
6 * ====================================================================
7 *
8 * Copyright 1999-2006 The Apache Software Foundation
9 *
10 * Licensed under the Apache License, Version 2.0 (the "License");
11 * you may not use this file except in compliance with the License.
12 * You may obtain a copy of the License at
13 *
14 * http://www.apache.org/licenses/LICENSE-2.0
15 *
16 * Unless required by applicable law or agreed to in writing, software
17 * distributed under the License is distributed on an "AS IS" BASIS,
18 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
19 * See the License for the specific language governing permissions and
20 * limitations under the License.
21 * ====================================================================
22 *
23 * This software consists of voluntary contributions made by many
24 * individuals on behalf of the Apache Software Foundation. For more
25 * information on the Apache Software Foundation, please see
26 * <http://www.apache.org/>.
27 *
28 */
29
30 package org.apache.http.io;
31
32 import java.io.IOException;
33 import java.io.InputStream;
34
35 /**
36 * A stream for reading from a {@link HttpDataReceiver HttpDataReceiver}.
37 *
38 * @author <a href="mailto:oleg at ural.ru">Oleg Kalnichevski</a>
39 *
40 * @version $Revision: 376961 $
41 *
42 * @since 4.0
43 */
44 public class HttpDataInputStream extends InputStream {
45
46 private final HttpDataReceiver datareceiver;
47
48 private boolean closed = false;
49
50 public HttpDataInputStream(final HttpDataReceiver datareceiver) {
51 super();
52 if (datareceiver == null) {
53 throw new IllegalArgumentException("HTTP data receiver may not be null");
54 }
55 this.datareceiver = datareceiver;
56 }
57
58 public int available() throws IOException {
59 if (!this.closed && this.datareceiver.isDataAvailable(10)) {
60 return 1;
61 } else {
62 return 0;
63 }
64 }
65
66 public void close() throws IOException {
67 this.closed = true;
68 }
69
70 public int read() throws IOException {
71 if (this.closed) {
72 return -1;
73 } else {
74 return this.datareceiver.read();
75 }
76 }
77
78 public int read(final byte[] b, int off, int len) throws IOException {
79 if (this.closed) {
80 return -1;
81 } else {
82 return this.datareceiver.read(b, off, len);
83 }
84 }
85
86 }