Classes in this File | Line Coverage | Branch Coverage | Complexity | ||||
MllpDecoder |
|
| 2.75;2.75 |
1 | /* | |
2 | The contents of this file are subject to the Mozilla Public License Version 1.1 | |
3 | (the "License"); you may not use this file except in compliance with the License. | |
4 | You may obtain a copy of the License at http://www.mozilla.org/MPL/ | |
5 | Software distributed under the License is distributed on an "AS IS" basis, | |
6 | WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License for the | |
7 | specific language governing rights and limitations under the License. | |
8 | ||
9 | The Original Code is "MllpDecoder.java". Description: | |
10 | "Decodes an MLLP input stream into a string" | |
11 | ||
12 | The Initial Developer of the Original Code is University Health Network. Copyright (C) | |
13 | 2013. All Rights Reserved. | |
14 | ||
15 | Contributor(s): ______________________________________. | |
16 | ||
17 | Alternatively, the contents of this file may be used under the terms of the | |
18 | GNU General Public License (the "GPL"), in which case the provisions of the GPL are | |
19 | applicable instead of those above. If you wish to allow use of your version of this | |
20 | file only under the terms of the GPL and not to allow others to use your version | |
21 | of this file under the MPL, indicate your decision by deleting the provisions above | |
22 | and replace them with the notice and other provisions required by the GPL License. | |
23 | If you do not delete the provisions above, a recipient may use your version of | |
24 | this file under either the MPL or the GPL. | |
25 | */ | |
26 | ||
27 | package ca.uhn.hl7v2.llp; | |
28 | ||
29 | import java.io.ByteArrayOutputStream; | |
30 | import java.io.IOException; | |
31 | import java.io.InputStream; | |
32 | import java.io.UnsupportedEncodingException; | |
33 | import java.net.SocketTimeoutException; | |
34 | import java.nio.charset.Charset; | |
35 | ||
36 | /** | |
37 | * MllpDecoder decodes an InputStream into a String. | |
38 | * | |
39 | * @author Christian Ohr | |
40 | */ | |
41 | class MllpDecoder { | |
42 | ||
43 | protected Charset charset; | |
44 | 5 | private static final org.slf4j.Logger ourLog = org.slf4j.LoggerFactory.getLogger(MllpDecoder.class); |
45 | ||
46 | 803 | MllpDecoder(Charset charset) { |
47 | 803 | this.charset = charset; |
48 | 803 | } |
49 | ||
50 | /** | |
51 | * Returns a HL7 message string extracted from the MLLP stream | |
52 | * | |
53 | * @param in MLLP input stream | |
54 | * @return HL7 message string | |
55 | * @throws IOException | |
56 | * @throws LLPException | |
57 | */ | |
58 | public String getMessage(InputStream in) throws IOException, LLPException { | |
59 | 2199 | ByteArrayOutputStream out = new ByteArrayOutputStream(); |
60 | try { | |
61 | 2199 | MllpDecoderState state = MllpDecoderState.START; |
62 | 304095 | while (state != MllpDecoderState.END) { |
63 | 302699 | state = state.read(in, out); |
64 | } | |
65 | 214 | } catch (SocketTimeoutException e) { |
66 | 214 | if (out.size() == 0) { |
67 | 204 | ourLog.debug("Got SocketTimeoutException while waiting for data"); |
68 | } else { | |
69 | 10 | ourLog.warn("Got SocketTimeoutException while waiting for data, discarding {} bytes", out.size()); |
70 | } | |
71 | 214 | return null; |
72 | 1396 | } |
73 | 1396 | return out.size() > 0 ? toString(out.toByteArray()) : null; |
74 | } | |
75 | ||
76 | /** | |
77 | * Converts the extract byte sequence into a String. This method must respect | |
78 | * a Charset, which is either statically configured or may be obtained at runtime. | |
79 | * | |
80 | * @param data HL7 message as byte sequence | |
81 | * @return HL7 message String using correct charset | |
82 | */ | |
83 | protected String toString(byte[] data) { | |
84 | 1296 | return asString(data, charset); |
85 | } | |
86 | ||
87 | protected static String asString(byte[] data, Charset charset) { | |
88 | try { | |
89 | 1396 | return new String(data, charset.name()); // remain 1.5 compatible |
90 | 0 | } catch (UnsupportedEncodingException e) { |
91 | // never happens | |
92 | 0 | return null; |
93 | } | |
94 | } | |
95 | } |