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1 package org.jical;
2
3 import java.util.Map  ;
7 import java.util.regex.Matcher ;
8 import java.util.regex.Pattern ;
9
10 public class ContentLineParser {
11
12 private static final String RR_ALPHA = "A-Za-z";
13 private static final String RR_DIGIT = "0-9";
14 private static final String RR_DQUOTE = "\\\"";
15 private static final String RR_WSP = " \\t";
16 private static final String RR_CTL = "\\x00-\\x08\\x0A-\\x1F\\x7F";
17 private static final String RR_SEP = ";:,";
18
19 private static final String R_QSAFE_CHAR = "[^"+RR_CTL+RR_DQUOTE+"]";
20 private static final String R_SAFE_CHAR = "[^"+RR_CTL+RR_DQUOTE+RR_SEP+"]";
21 private static final String R_VALUE_CHAR = "[^"+RR_CTL+"]";
22 private static final String R_NAME_CHAR = "[\\-"+RR_ALPHA+RR_DIGIT+"]";
23
24 private static final String RC_PARAM_VALUE = "(?:(?:"+RR_DQUOTE+"("+R_QSAFE_CHAR+"*)"+RR_DQUOTE+")|("+R_SAFE_CHAR+"*))";
25 private static final String RC_PARAM = "("+R_NAME_CHAR+"*)="+RC_PARAM_VALUE+"[;:]";
26 private static final String RC_NAME = "("+R_NAME_CHAR+"*)[;:]";
27
28 private static final Pattern NAME_PATTERN = Pattern.compile( RC_NAME );
29 private static final Pattern PARAM_PATTERN = Pattern.compile( RC_PARAM );
30
31 public static ContentLine parse( CharSequence cs ) {
32 Matcher nameMatcher = NAME_PATTERN.matcher( cs );
33 Matcher paramMatcher = PARAM_PATTERN.matcher( cs );
34 int start = 0;
35 if ( nameMatcher.find( start ) ) {
36 MutableContentLine contentLine = new MutableContentLine();
37 {
38 contentLine.setRawLine( cs.toString() );
39 }
40 {
41 contentLine.setName( nameMatcher.group( 1 ) );
42 start = nameMatcher.end();
43 }
44 if ( cs.charAt( start - 1 ) == ';' ) {
45 Map params = contentLine.getMutableParameters();
46 while ( paramMatcher.find( start ) ) {
47 String key = paramMatcher.group(1);
48 String val = paramMatcher.group(2);
49 if ( val == null ) {
50 val = paramMatcher.group(3);
51 }
52 params.put( key, val );
53 start = paramMatcher.end();
54 }
55 }
56 {
57 contentLine.setValue( cs.subSequence( start, cs.length() ).toString() );
58 }
59 return contentLine;
60 }
61 return null;
62 }
63 }
64 |
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