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1
7
8 package javax.management.loading;
9
10
11 import java.net.URL  ;
13 import java.net.URLConnection ;
14 import java.net.MalformedURLException ;
15 import java.io.Reader ;
16 import java.io.IOException ;
17 import java.io.BufferedReader ;
18 import java.io.InputStreamReader ;
19 import java.io.File ;
20 import java.util.Hashtable ;
21 import java.util.Vector ;
22
23 import com.sun.jmx.trace.Trace;
24
25
26
31 class MLetParser {
32
33
38
39
42 private int c;
43
44
47 private static String tag = "mlet";
48
49
52 private String dbgTag = "MLetParser";
53
54
55
60
61
64 public MLetParser() {
65 }
66
67
72
73
76 public void skipSpace(Reader in) throws IOException {
77 while ((c >= 0) && ((c == ' ') || (c == '\t') || (c == '\n') || (c == '\r'))) {
78 c = in.read();
79 }
80 }
81
82
85 public String scanIdentifier(Reader in) throws IOException {
86 StringBuffer buf = new StringBuffer ();
87 while (true) {
88 if (((c >= 'a') && (c <= 'z')) ||
89 ((c >= 'A') && (c <= 'Z')) ||
90 ((c >= '0') && (c <= '9')) || (c == '_')) {
91 buf.append((char)c);
92 c = in.read();
93 } else {
94 return buf.toString();
95 }
96 }
97 }
98
99
102 public Hashtable scanTag(Reader in) throws IOException {
103 Hashtable atts = new Hashtable ();
104 skipSpace(in);
105 while (c >= 0 && c != '>') {
106 String att = scanIdentifier(in);
107 String val = "";
108 skipSpace(in);
109 if (c == '=') {
110 int quote = -1;
111 c = in.read();
112 skipSpace(in);
113 if ((c == '\'') || (c == '\"')) {
114 quote = c;
115 c = in.read();
116 }
117 StringBuffer buf = new StringBuffer ();
118 while ((c > 0) &&
119 (((quote < 0) && (c != ' ') && (c != '\t') &&
120 (c != '\n') && (c != '\r') && (c != '>'))
121 || ((quote >= 0) && (c != quote)))) {
122 buf.append((char)c);
123 c = in.read();
124 }
125 if (c == quote) {
126 c = in.read();
127 }
128 skipSpace(in);
129 val = buf.toString();
130 }
131 atts.put(att.toLowerCase(), val);
132 skipSpace(in);
133 }
134 return atts;
135 }
136
137
140 public Vector parse(URL url) throws IOException {
141 String mth = "parse";
142 String requiresNameWarning = "<param name=... value=...> tag requires name parameter.";
144 String paramOutsideWarning = "<param> tag outside <mlet> ... </mlet>.";
145 String requiresCodeWarning = "<mlet> tag requires either code or object parameter.";
146 String requiresJarsWarning = "<mlet> tag requires archive parameter.";
147
148 URLConnection conn;
149
150 conn = url.openConnection();
151 Reader in = new BufferedReader (new InputStreamReader (conn.getInputStream(), "UTF-8"));
152
153 url = conn.getURL();
157
158 Vector mlets = new Vector ();
159 Hashtable atts = null;
160
161 Vector types = new Vector ();
162 Vector values = new Vector ();
163
164 while(true) {
166 c = in.read();
167 if (c == -1)
168 break;
169 if (c == '<') {
170 c = in.read();
171 if (c == '/') {
172 c = in.read();
173 String nm = scanIdentifier(in);
174 if (nm.equalsIgnoreCase(tag)) {
175 if (atts != null) {
176 if ((types.size() == values.size()) && ((!types.isEmpty()) && (!values.isEmpty()))) {
178 atts.put("types", types.clone());
179 atts.put("values", values.clone());
180 }
181 mlets.addElement(new MLetContent (url, atts));
182 }
183 atts = null;
184 types.removeAllElements();
185 values.removeAllElements();
186 }
187 } else {
188 String nm = scanIdentifier(in);
189 if (nm.equalsIgnoreCase("arg")) {
190 Hashtable t = scanTag(in);
191 String att = (String ) t.get("type");
192 if (att == null) {
193 if (isTraceOn()) {
194 trace(mth, requiresNameWarning);
195 }
196 throw new IOException (requiresNameWarning);
197 } else {
198 if (atts != null) {
199 types.addElement(att);
200 } else {
201 if (isTraceOn()) {
202 trace(mth, paramOutsideWarning);
203 }
204 throw new IOException (paramOutsideWarning);
205 }
206 }
207 String val = (String ) t.get("value");
208 if (val == null) {
209 if (isTraceOn()) {
210 trace(mth, requiresNameWarning);
211 }
212 throw new IOException (requiresNameWarning);
213 } else {
214 if (atts != null) {
215 values.addElement(val);
216 } else {
217 if (isTraceOn()) {
218 trace(mth, paramOutsideWarning);
219 }
220 throw new IOException (paramOutsideWarning);
221 }
222 }
223 }
224 else {
225 if (nm.equalsIgnoreCase(tag)) {
226 atts = scanTag(in);
227 if (atts.get("code") == null && atts.get("object") == null) {
228 if (isTraceOn()) {
229 trace(mth, requiresCodeWarning);
230 }
231 atts = null;
232 throw new IOException (requiresCodeWarning);
233 }
234 if (atts.get("archive") == null) {
235 if (isTraceOn()) {
236 trace(mth, requiresJarsWarning);
237 }
238 atts = null;
239 throw new IOException (requiresJarsWarning);
240 }
241 }
242 }
243 }
244 }
245 }
246 in.close();
247 return mlets;
248 }
249
250
253 public Vector parseURL(String urlname) throws IOException {
254 URL url = null;
257 if (urlname.indexOf(':') <= 1) {
258 String userDir = System.getProperty("user.dir");
259 String prot;
260 if (userDir.charAt(0) == '/' ||
261 userDir.charAt(0) == File.separatorChar) {
262 prot = "file:";
263 } else {
264 prot = "file:/";
265 }
266 url =
267 new URL (prot + userDir.replace(File.separatorChar, '/') + "/");
268 url = new URL (url, urlname);
269 } else {
270 url = new URL (urlname);
271 }
272 return parse(url);
275 }
276
277
282
283
286 private boolean isTraceOn() {
287 return Trace.isSelected(Trace.LEVEL_TRACE, Trace.INFO_MLET);
288 }
289
290 private void trace(String clz, String func, String info) {
291 Trace.send(Trace.LEVEL_TRACE, Trace.INFO_MLET, clz, func, info);
292 }
293
294 private void trace(String func, String info) {
295 trace(dbgTag, func, info);
296 }
297
298 private boolean isDebugOn() {
299 return Trace.isSelected(Trace.LEVEL_DEBUG, Trace.INFO_MLET);
300 }
301
302 private void debug(String clz, String func, String info) {
303 Trace.send(Trace.LEVEL_DEBUG, Trace.INFO_MLET, clz, func, info);
304 }
305
306 private void debug(String func, String info) {
307 debug(dbgTag, func, info);
308 }
309
310 }
311 |
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