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 package org.apache.http.nio.util;
28
29 import java.io.IOException;
30
31 import org.apache.http.annotation.NotThreadSafe;
32 import org.apache.http.nio.ContentEncoder;
33
34 /**
35 * Basic implementation of the {@link ContentOutputBuffer} interface.
36 * <p>
37 * This class is not thread safe.
38 *
39 * @since 4.0
40 */
41 @NotThreadSafe
42 public class SimpleOutputBuffer extends ExpandableBuffer implements ContentOutputBuffer {
43
44 private boolean endOfStream;
45
46 public SimpleOutputBuffer(int buffersize, final ByteBufferAllocator allocator) {
47 super(buffersize, allocator);
48 this.endOfStream = false;
49 }
50
51 public int produceContent(final ContentEncoder encoder) throws IOException {
52 setOutputMode();
53 int bytesWritten = encoder.write(this.buffer);
54 if (!hasData() && this.endOfStream) {
55 encoder.complete();
56 }
57 return bytesWritten;
58 }
59
60 public void write(final byte[] b, int off, int len) throws IOException {
61 if (b == null) {
62 return;
63 }
64 if (this.endOfStream) {
65 return;
66 }
67 setInputMode();
68 ensureCapacity(this.buffer.position() + len);
69 this.buffer.put(b, off, len);
70 }
71
72 public void write(final byte[] b) throws IOException {
73 if (b == null) {
74 return;
75 }
76 if (this.endOfStream) {
77 return;
78 }
79 write(b, 0, b.length);
80 }
81
82 public void write(int b) throws IOException {
83 if (this.endOfStream) {
84 return;
85 }
86 setInputMode();
87 ensureCapacity(this.capacity() + 1);
88 this.buffer.put((byte)b);
89 }
90
91 public void reset() {
92 super.clear();
93 this.endOfStream = false;
94 }
95
96 public void flush() {
97 }
98
99 public void writeCompleted() {
100 this.endOfStream = true;
101 }
102
103 public void shutdown() {
104 this.endOfStream = true;
105 }
106
107 }