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1 package org.objectweb.celtix.tools.utils;
2
3 import java.util.ArrayList  ;
4 import java.util.Arrays ;
5 import java.util.HashSet ;
6 import java.util.List ;
7 import java.util.Set ;
8 import java.util.StringTokenizer ;
9
10 public final class URIParserUtil {
11 private static final Set <String > KEYWORDS = new HashSet <String >(Arrays
12 .asList(new String [] {"abstract", "boolean", "break", "byte", "case", "catch", "char", "class",
13 "const", "continue", "default", "do", "double", "else", "extends", "final",
14 "finally", "float", "for", "goto", "if", "implements", "import", "instanceof",
15 "int", "interface", "long", "native", "new", "package", "private", "protected",
16 "public", "return", "short", "static", "strictfp", "super", "switch",
17 "synchronized", "this", "throw", "throws", "transient", "try", "void",
18 "volatile", "while", "true", "false", "null", "assert", "enum"}));
19
20 private URIParserUtil() {
21 }
23
24 public static String getPackageName(String nameSpaceURI) {
25 int idx = nameSpaceURI.indexOf(':');
26 String scheme = "";
27 if (idx >= 0) {
28 scheme = nameSpaceURI.substring(0, idx);
29 if ("http".equalsIgnoreCase(scheme) || "urn".equalsIgnoreCase(scheme)) {
30 nameSpaceURI = nameSpaceURI.substring(idx + 1);
31 }
32 }
33
34 List <String > tokens = tokenize(nameSpaceURI, "/: ");
35 if (tokens.size() == 0) {
36 return null;
37 }
38
39 if (tokens.size() > 1) {
40 String lastToken = tokens.get(tokens.size() - 1);
41 idx = lastToken.lastIndexOf('.');
42 if (idx > 0) {
43 lastToken = lastToken.substring(0, idx);
44 tokens.set(tokens.size() - 1, lastToken);
45 }
46 }
47
48 String domain = tokens.get(0);
49 idx = domain.indexOf(':');
50 if (idx >= 0) {
51 domain = domain.substring(0, idx);
52 }
53 List <String > r = reverse(tokenize(domain, "urn".equals(scheme) ? ".-" : "."));
54 if ("www".equalsIgnoreCase(r.get(r.size() - 1))) {
55 r.remove(r.size() - 1);
57 }
58
59 tokens.addAll(1, r);
61 tokens.remove(0);
62
63 for (int i = 0; i < tokens.size(); i++) {
65
66 String token = tokens.get(i);
68 token = removeIllegalIdentifierChars(token);
69
70 if (contiansReservedKeywords(token)) {
72 token = '_' + token;
73 }
74
75 tokens.set(i, token.toLowerCase());
76 }
77
78 return combine(tokens, '.');
80 }
81
82 public static String getNamespace(String packageName) {
83 if (packageName == null || packageName.length() == 0) {
84 return null;
85 }
86 StringTokenizer tokenizer = new StringTokenizer (packageName, ".");
87 String [] tokens;
88 if (tokenizer.countTokens() == 0) {
89 tokens = new String [0];
90 } else {
91 tokens = new String [tokenizer.countTokens()];
92 for (int i = tokenizer.countTokens() - 1; i >= 0; i--) {
93 tokens[i] = tokenizer.nextToken();
94 }
95 }
96 StringBuffer namespace = new StringBuffer ("http://");
97 String dot = "";
98 for (int i = 0; i < tokens.length; i++) {
99 if (i == 1) {
100 dot = ".";
101 }
102 namespace.append(dot + tokens[i]);
103 }
104 namespace.append('/');
105 return namespace.toString();
106 }
107
108 private static List <String > tokenize(String str, String sep) {
109 StringTokenizer tokens = new StringTokenizer (str, sep);
110 List <String > r = new ArrayList <String >();
111
112 while (tokens.hasMoreTokens()) {
113 r.add(tokens.nextToken());
114 }
115 return r;
116 }
117
118 private static String removeIllegalIdentifierChars(String token) {
119 StringBuffer newToken = new StringBuffer ();
120 for (int i = 0; i < token.length(); i++) {
121 char c = token.charAt(i);
122
123 if (i == 0 && !Character.isJavaIdentifierStart(c)) {
124 newToken.append("_" + c);
126 } else if (!Character.isJavaIdentifierPart(c)) {
127 newToken.append('_');
129 } else {
130 newToken.append(c);
132 }
133 }
134 return newToken.toString();
135 }
136
137 private static String combine(List r, char sep) {
138 StringBuilder buf = new StringBuilder (r.get(0).toString());
139
140 for (int i = 1; i < r.size(); i++) {
141 buf.append(sep);
142 buf.append(r.get(i));
143 }
144
145 return buf.toString();
146 }
147
148 private static <T> List <T> reverse(List <T> a) {
149 List <T> r = new ArrayList <T>();
150
151 for (int i = a.size() - 1; i >= 0; i--) {
152 r.add(a.get(i));
153 }
154 return r;
155 }
156
157 private static boolean contiansReservedKeywords(String token) {
158 return KEYWORDS.contains(token);
159 }
160 }
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