1/*
2 * Copyright (c) 2004, 2011, Oracle and/or its affiliates. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 *
8 *   - Redistributions of source code must retain the above copyright
9 *     notice, this list of conditions and the following disclaimer.
10 *
11 *   - Redistributions in binary form must reproduce the above copyright
12 *     notice, this list of conditions and the following disclaimer in the
13 *     documentation and/or other materials provided with the distribution.
14 *
15 *   - Neither the name of Oracle nor the names of its
16 *     contributors may be used to endorse or promote products derived
17 *     from this software without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
20 * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
21 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR
23 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
24 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
25 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
26 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
27 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
28 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
29 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30 */
31
32/*
33 * This source code is provided to illustrate the usage of a given feature
34 * or technique and has been deliberately simplified. Additional steps
35 * required for a production-quality application, such as security checks,
36 * input validation and proper error handling, might not be present in
37 * this sample code.
38 */
39
40
41import java.io.*;
42import java.nio.*;
43import java.nio.charset.*;
44
45/**
46 * A Content type that provides for transferring Strings.
47 *
48 * @author Mark Reinhold
49 * @author Brad R. Wetmore
50 */
51class StringContent implements Content {
52
53    private static Charset ascii = Charset.forName("US-ASCII");
54
55    private String type;                // MIME type
56    private String content;
57
58    StringContent(CharSequence c, String t) {
59        content = c.toString();
60        if (!content.endsWith("\n"))
61            content += "\n";
62        type = t + "; charset=iso-8859-1";
63    }
64
65    StringContent(CharSequence c) {
66        this(c, "text/plain");
67    }
68
69    StringContent(Exception x) {
70        StringWriter sw = new StringWriter();
71        x.printStackTrace(new PrintWriter(sw));
72        type = "text/plain; charset=iso-8859-1";
73        content = sw.toString();
74    }
75
76    public String type() {
77        return type;
78    }
79
80    private ByteBuffer bb = null;
81
82    private void encode() {
83        if (bb == null)
84            bb = ascii.encode(CharBuffer.wrap(content));
85    }
86
87    public long length() {
88        encode();
89        return bb.remaining();
90    }
91
92    public void prepare() {
93        encode();
94        bb.rewind();
95    }
96
97    public boolean send(ChannelIO cio) throws IOException {
98        if (bb == null)
99            throw new IllegalStateException();
100        cio.write(bb);
101
102        return bb.hasRemaining();
103    }
104
105    public void release() throws IOException {
106    }
107}
108