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/IdentityEncoder.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.FileChannel;
37: import java.nio.channels.WritableByteChannel;
38:
39: import org.apache.http.impl.io.HttpTransportMetricsImpl;
40: import org.apache.http.nio.FileContentEncoder;
41: import org.apache.http.nio.reactor.SessionOutputBuffer;
42:
43: /**
44: * Identity encoder implementation.
45: *
46: * @author <a href="mailto:oleg at ural.ru">Oleg Kalnichevski</a>
47: * @author Andrea Selva
48: *
49: * @version $Revision: 613298 $
50: *
51: * @since 4.0
52: */
53: public class IdentityEncoder extends AbstractContentEncoder implements
54: FileContentEncoder {
55:
56: public IdentityEncoder(final WritableByteChannel channel,
57: final SessionOutputBuffer buffer,
58: final HttpTransportMetricsImpl metrics) {
59: super (channel, buffer, metrics);
60: }
61:
62: public int write(final ByteBuffer src) throws IOException {
63: if (src == null) {
64: return 0;
65: }
66: assertNotCompleted();
67: int bytesWritten = this .channel.write(src);
68: if (bytesWritten > 0) {
69: this .metrics.incrementBytesTransferred(bytesWritten);
70: }
71: return bytesWritten;
72: }
73:
74: public long transfer(final FileChannel src, long position,
75: long count) throws IOException {
76:
77: if (src == null) {
78: return 0;
79: }
80: assertNotCompleted();
81: long bytesWritten = src.transferTo(position, count,
82: this .channel);
83: if (bytesWritten > 0) {
84: this .metrics.incrementBytesTransferred(bytesWritten);
85: }
86: return bytesWritten;
87: }
88:
89: @Override
90: public String toString() {
91: StringBuffer buffer = new StringBuffer();
92: buffer.append("[identity; completed: ");
93: buffer.append(this .completed);
94: buffer.append("]");
95: return buffer.toString();
96: }
97:
98: }
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