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1 package com.opensymphony.module.sitemesh.util;
2
3 import java.io;
4
5 /**
6 * A converter from one character type to another
7 * <p>
8 * This class is not threadsafe
9 */
10 public class OutputConverter
11 {
12 /**
13 * Resin versions 2.1.12 and previously have encoding problems for internationalisation.
14 * <p>
15 * This is fixed in Resin 2.1.13. Once 2.1.13 is used more widely, this parameter (and class) can be removed.
16 */
17 public static final String WORK_AROUND_RESIN_I18N_BUG = "sitemesh.resin.i18n.workaround";
18
19 public static Writer getWriter(Writer out)
20 {
21 if ("true".equalsIgnoreCase(System.getProperty(WORK_AROUND_RESIN_I18N_BUG)))
22 return new ResinWriter(out);
23 else
24 return out;
25 }
26
27 public static String convert(String inputString) throws IOException
28 {
29 if ("true".equalsIgnoreCase(System.getProperty(WORK_AROUND_RESIN_I18N_BUG)))
30 {
31 StringWriter sr = new StringWriter();
32 resinConvert(inputString, sr);
33 return sr.getBuffer().toString();
34 }
35 else
36 return inputString;
37 }
38
39 /**
40 * To get internationalised characters to work on Resin, some conversions need to take place.
41 */
42 static class ResinWriter extends Writer
43 {
44 private final Writer target;
45 private final CharArrayWriter buffer = new CharArrayWriter();
46
47 public ResinWriter(Writer target)
48 {
49 this.target = target;
50 }
51
52 public void close() throws IOException
53 {
54 flush();
55 }
56
57 public void flush() throws IOException
58 {
59 resinConvert(buffer.toString(), target);
60 buffer.reset();
61 }
62
63 public void write(char cbuf[], int off, int len) throws IOException
64 {
65 buffer.write(cbuf, off, len);
66 flush();
67 }
68 }
69
70 private static void resinConvert(String inputString, Writer writer) throws IOException
71 {
72 //does this need to be made configurable? Or are these two always correct?
73 InputStreamReader reader = new InputStreamReader(new ByteArrayInputStream(inputString.getBytes("UTF-8")), "ISO-8859-1");
74 int i;
75 while ((i = reader.read()) != -1)
76 {
77 writer.write(i);
78 }
79 writer.flush();
80 }
81
82 }