01: /*
02: * $HeadURL: https://svn.apache.org/repos/asf/httpcomponents/httpcore/tags/4.0-beta1/module-nio/src/main/java/org/apache/http/impl/nio/codecs/ChunkEncoder.java $
03: * $Revision: 613298 $
04: * $Date: 2008-01-18 23:09:22 +0100 (Fri, 18 Jan 2008) $
05: *
06: * ====================================================================
07: * Licensed to the Apache Software Foundation (ASF) under one
08: * or more contributor license agreements. See the NOTICE file
09: * distributed with this work for additional information
10: * regarding copyright ownership. The ASF licenses this file
11: * to you under the Apache License, Version 2.0 (the
12: * "License"); you may not use this file except in compliance
13: * with the License. You may obtain a copy of the License at
14: *
15: * http://www.apache.org/licenses/LICENSE-2.0
16: *
17: * Unless required by applicable law or agreed to in writing,
18: * software distributed under the License is distributed on an
19: * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
20: * KIND, either express or implied. See the License for the
21: * specific language governing permissions and limitations
22: * under the License.
23: * ====================================================================
24: *
25: * This software consists of voluntary contributions made by many
26: * individuals on behalf of the Apache Software Foundation. For more
27: * information on the Apache Software Foundation, please see
28: * <http://www.apache.org/>.
29: *
30: */
31:
32: package org.apache.http.impl.nio.codecs;
33:
34: import java.io.IOException;
35: import java.nio.ByteBuffer;
36: import java.nio.channels.WritableByteChannel;
37:
38: import org.apache.http.impl.io.HttpTransportMetricsImpl;
39: import org.apache.http.nio.reactor.SessionOutputBuffer;
40: import org.apache.http.util.CharArrayBuffer;
41:
42: public class ChunkEncoder extends AbstractContentEncoder {
43:
44: private final CharArrayBuffer lineBuffer;
45:
46: public ChunkEncoder(final WritableByteChannel channel,
47: final SessionOutputBuffer buffer,
48: final HttpTransportMetricsImpl metrics) {
49: super (channel, buffer, metrics);
50: this .lineBuffer = new CharArrayBuffer(16);
51: }
52:
53: public int write(final ByteBuffer src) throws IOException {
54: if (src == null) {
55: return 0;
56: }
57: assertNotCompleted();
58: int chunk = src.remaining();
59: if (chunk == 0) {
60: return 0;
61: }
62: this .lineBuffer.clear();
63: this .lineBuffer.append(Integer.toHexString(chunk));
64: this .buffer.writeLine(this .lineBuffer);
65: this .buffer.write(src);
66: this .lineBuffer.clear();
67: this .buffer.writeLine(this .lineBuffer);
68: return chunk;
69: }
70:
71: @Override
72: public void complete() throws IOException {
73: assertNotCompleted();
74: this .lineBuffer.clear();
75: this .lineBuffer.append("0");
76: this .buffer.writeLine(this .lineBuffer);
77: this .lineBuffer.clear();
78: this .buffer.writeLine(this .lineBuffer);
79: this .completed = true; // == super.complete()
80: }
81:
82: @Override
83: public String toString() {
84: StringBuffer buffer = new StringBuffer();
85: buffer.append("[chunk-coded; completed: ");
86: buffer.append(this .completed);
87: buffer.append("]");
88: return buffer.toString();
89: }
90:
91: }
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