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1 package gnu.xquery.util;
2 import gnu.mapping.*;
3 import gnu.xml.*;
4 import gnu.kawa.xml.*;
5 import gnu.text.URI_utils;
6
7 public class QNameUtils
8 {
9 public static Object  resolveQNameUsingElement (Object qname, KElement node)
10 {
11 qname = KNode.atomicValue(qname);
12 if (qname == Values.empty || qname == null)
13 return qname;
14 if (qname instanceof Values
15 || ! (qname instanceof String || qname instanceof UntypedAtomic))
16 throw new RuntimeException ("bad argument to QName");
17 String name = TextUtils.replaceWhitespace(qname.toString(), true);
18 int colon = name.indexOf(':');
19 String prefix, localPart, uri;
20 if (colon < 0)
21 {
22 prefix = null;
23 localPart = name;
24 }
25 else
26 {
27 prefix = name.substring(0, colon).intern();
28 localPart = name.substring(colon+1);
29 }
30 uri = node.lookupNamespaceURI(prefix);
31 if (uri == null)
32 {
33 if (prefix == null)
34 uri = "";
35 else
36 throw new RuntimeException ("unknown namespace for '"+name+"'");
37 }
38 if (! validNCName(localPart)
39 || (prefix != null && ! validNCName(prefix)))
40 {
41 throw new RuntimeException ("invalid QName syntax '"+name+"'");
42 }
43 return Symbol.make(uri, localPart, prefix == null ? "" : prefix);
44 }
45
46
53 public static Object resolveQName (Object qname,
54 NamespaceBinding constructorNamespaces,
55 NamespaceBinding prologNamespaces)
56 {
57 qname = KNode.atomicValue(qname);
58 if (qname instanceof Symbol)
59 return qname;
60 if (qname instanceof Values
61 || ! (qname instanceof String || qname instanceof UntypedAtomic))
62 throw new RuntimeException ("bad argument to QName");
63 String name = TextUtils.replaceWhitespace(qname.toString(), true);
64 int colon = name.indexOf(':');
65 String prefix, localPart;
66 if (colon < 0)
67 {
68 localPart = name;
69 prefix = null;
70 }
71 else
72 {
73 prefix = name.substring(0, colon).intern();
74 localPart = name.substring(colon+1);
75 }
76 if (! validNCName(localPart)
77 || (prefix != null && ! validNCName(prefix)))
78 {
79 throw new RuntimeException ("invalid QName syntax '"+name+"'");
80 }
81 String uri = resolvePrefix(prefix, constructorNamespaces, prologNamespaces);
82 return Symbol.make(uri, localPart, prefix == null ? "" : prefix);
83 }
84
85
88 public static String lookupPrefix (String prefix,
89 NamespaceBinding constructorNamespaces,
90 NamespaceBinding prologNamespaces)
91 {
92 String uri;
93
94 for (NamespaceBinding ns = constructorNamespaces; ; ns = ns.getNext())
95 {
96 if (ns == null)
97 {
98 uri = prologNamespaces.resolve(prefix);
99 break;
100 }
101 if (ns.getPrefix() == prefix || ns.getUri() == null)
102 {
103 uri = ns.getUri();
104 break;
105 }
106 }
107 if (uri == null && prefix == null)
108 uri = "";
109 return uri;
110 }
111
112
115 public static String resolvePrefix (String prefix,
116 NamespaceBinding constructorNamespaces,
117 NamespaceBinding prologNamespaces)
118 {
119 String uri = lookupPrefix(prefix, constructorNamespaces, prologNamespaces);
120 if (uri == null)
121 throw new RuntimeException ("unknown namespace prefix '"+prefix+"'");
122 return uri;
123 }
124
125 public static boolean validNCName (String name)
126 {
127 return XName.isName(name);
128 }
129
130
131
132 public static Symbol makeQName (Object paramURI, String paramQName)
133 {
134 if (paramURI == null || paramURI == Values.empty)
135 paramURI = "";
136 int colon = paramQName.indexOf(':');
137 String namespaceURI = (String ) paramURI, localPart, prefix;
138 if (colon < 0)
139 {
140 localPart = paramQName;
141 prefix = "";
142 }
143 else
144 {
145 localPart = paramQName.substring(colon+1);
146 prefix = paramQName.substring(0, colon).intern();
147 }
148 if (! validNCName(localPart)
149 || (colon >= 0 && ! validNCName(prefix)))
150 throw new IllegalArgumentException ("invalid QName syntax '"+paramQName+"'");
151 if (colon >= 0 && namespaceURI.length() == 0)
152 throw new IllegalArgumentException ("empty uri for '"+paramQName+"'");
153 return Symbol.make(namespaceURI, localPart, prefix);
154 }
155
156 public static Object localNameFromQName (Object name)
157 {
158 if (name == Values.empty || name == null)
159 return name;
160 if (name instanceof Symbol)
161 return ((Symbol) name).getName();
162 throw WrongType.make(null, "local-name-from-QName", 1, name);
163 }
164
165 public static Object prefixFromQName (Object name)
166 {
167 if (name == Values.empty || name == null)
168 return name;
169 if (name instanceof Symbol)
170 {
171 String prefix = ((Symbol) name).getPrefix();
172 if (prefix == null || prefix.length() == 0)
173 return Values.empty;
174 return prefix;
175 }
176 throw WrongType.make(null, "prefix-from-QName", 1, name);
177 }
178
179 public static Object namespaceURIFromQName (Object name)
180 {
181 if (name == Values.empty || name == null)
182 return name;
183 if (name instanceof Symbol)
184 return XDataType.toURI(((Symbol) name).getNamespaceURI());
185 throw WrongType.make(null, "namespace-uri", 1, name);
186 }
187
188 public static Object namespaceURIForPrefix (Object prefix,
189 Object element)
190 {
191 KNode el = KNode.coerce(element);
192 if (el == null)
193 throw WrongType.make(null, "namespace-uri-for-prefix", 2, element);
194 String str;
195 if (prefix == null || prefix == Values.empty)
196 str = null;
197 else if (! (prefix instanceof String || prefix instanceof UntypedAtomic))
198 throw WrongType.make(null, "namespace-uri-for-prefix", 1, element);
199 else
200 {
201 str = prefix.toString().intern();
202 if (str == "")
203 str = null;
204 }
205 String uri = el.lookupNamespaceURI(str);
206 if (uri == null)
207 return Values.empty;
208 else
209 return uri;
210 }
211
212 public static Object resolveURI (Object relative, Object base)
213 throws java.net.URISyntaxException
214 {
215 if (relative instanceof KNode)
216 relative = KNode.atomicValue(relative);
217 if (base instanceof KNode)
218 base = KNode.atomicValue(base);
219 if (relative == Values.empty || relative == null)
220 return relative;
221 return URI_utils.resolve(relative, base);
222 }
223 }
224 |
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