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(final int buffersize, final ByteBufferAllocator allocator) {
47 super(buffersize, allocator);
48 this.endOfStream = false;
49 }
50
51 /**
52 * @since 4.3
53 */
54 public SimpleOutputBuffer(final int buffersize) {
55 this(buffersize, HeapByteBufferAllocator.INSTANCE);
56 }
57
58 public int produceContent(final ContentEncoder encoder) throws IOException {
59 setOutputMode();
60 final int bytesWritten = encoder.write(this.buffer);
61 if (!hasData() && this.endOfStream) {
62 encoder.complete();
63 }
64 return bytesWritten;
65 }
66
67 public void write(final byte[] b, final int off, final int len) throws IOException {
68 if (b == null) {
69 return;
70 }
71 if (this.endOfStream) {
72 return;
73 }
74 setInputMode();
75 ensureCapacity(this.buffer.position() + len);
76 this.buffer.put(b, off, len);
77 }
78
79 public void write(final byte[] b) throws IOException {
80 if (b == null) {
81 return;
82 }
83 if (this.endOfStream) {
84 return;
85 }
86 write(b, 0, b.length);
87 }
88
89 public void write(final int b) throws IOException {
90 if (this.endOfStream) {
91 return;
92 }
93 setInputMode();
94 ensureCapacity(this.capacity() + 1);
95 this.buffer.put((byte)b);
96 }
97
98 public void reset() {
99 super.clear();
100 this.endOfStream = false;
101 }
102
103 public void flush() {
104 }
105
106 public void writeCompleted() {
107 this.endOfStream = true;
108 }
109
110 public void shutdown() {
111 this.endOfStream = true;
112 }
113
114 }