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.impl.io;
29
30 import java.io.InputStream;
31
32 /**
33 * @since 4.4
34 * @deprecated Please use {@link org.apache.hc.core5.http.io.entity.EmptyInputStream}
35 */
36 @Deprecated
37 public final class EmptyInputStream extends InputStream {
38
39 public static final EmptyInputStreamo/EmptyInputStream.html#EmptyInputStream">EmptyInputStream INSTANCE = new EmptyInputStream();
40
41 private EmptyInputStream() {
42 // noop.
43 }
44
45 /**
46 * Returns {@code 0}.
47 */
48 @Override
49 public int available() {
50 return 0;
51 }
52
53 /**
54 * Noop.
55 */
56 @Override
57 public void close() {
58 // noop.
59 }
60
61 /**
62 * Noop.
63 */
64 @SuppressWarnings("sync-override")
65 @Override
66 public void mark(final int readLimit) {
67 // noop.
68 }
69
70 /**
71 * Returns {@code true}.
72 */
73 @Override
74 public boolean markSupported() {
75 return true;
76 }
77
78 /**
79 * Returns {@code -1}.
80 */
81 @Override
82 public int read() {
83 return -1;
84 }
85
86 /**
87 * Returns {@code -1}.
88 */
89 @Override
90 public int read(final byte[] buf) {
91 return -1;
92 }
93
94 /**
95 * Returns {@code -1}.
96 */
97 @Override
98 public int read(final byte[] buf, final int off, final int len) {
99 return -1;
100 }
101
102 /**
103 * Noop.
104 */
105 @SuppressWarnings("sync-override")
106 @Override
107 public void reset() {
108 // noop
109 }
110
111 /**
112 * Returns {@code 0}.
113 */
114 @Override
115 public long skip(final long n) {
116 return 0L;
117 }
118 }
119