Source Code Cross Referenced for JspDirectivePage.java in  » EJB-Server-resin-3.1.5 » resin » com » caucho » jsp » java » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » EJB Server resin 3.1.5 » resin » com.caucho.jsp.java 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /*
002:         * Copyright (c) 1998-2008 Caucho Technology -- all rights reserved
003:         *
004:         * This file is part of Resin(R) Open Source
005:         *
006:         * Each copy or derived work must preserve the copyright notice and this
007:         * notice unmodified.
008:         *
009:         * Resin Open Source is free software; you can redistribute it and/or modify
010:         * it under the terms of the GNU General Public License as published by
011:         * the Free Software Foundation; either version 2 of the License, or
012:         * (at your option) any later version.
013:         *
014:         * Resin Open Source is distributed in the hope that it will be useful,
015:         * but WITHOUT ANY WARRANTY; without even the implied warranty of
016:         * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, or any warranty
017:         * of NON-INFRINGEMENT.  See the GNU General Public License for more
018:         * details.
019:         *
020:         * You should have received a copy of the GNU General Public License
021:         * along with Resin Open Source; if not, write to the
022:         *   Free SoftwareFoundation, Inc.
023:         *   59 Temple Place, Suite 330
024:         *   Boston, MA 02111-1307  USA
025:         *
026:         * @author Scott Ferguson
027:         */
028:
029:        package com.caucho.jsp.java;
030:
031:        import com.caucho.jsp.JspParseException;
032:        import com.caucho.server.util.CauchoSystem;
033:        import com.caucho.util.L10N;
034:        import com.caucho.vfs.WriteStream;
035:        import com.caucho.xml.QName;
036:
037:        import javax.servlet.jsp.HttpJspPage;
038:        import java.io.IOException;
039:        import java.util.ArrayList;
040:        import java.util.logging.*;
041:
042:        public class JspDirectivePage extends JspNode {
043:            static L10N L = new L10N(JspDirectivePage.class);
044:
045:            private static final QName IS_EL_IGNORED = new QName("isELIgnored");
046:            private static final QName IS_VELOCITY_ENABLED = new QName(
047:                    "isVelocityEnabled");
048:            private static final QName INFO = new QName("info");
049:            private static final QName CONTENT_TYPE = new QName("contentType");
050:            private static final QName PAGE_ENCODING = new QName("pageEncoding");
051:            private static final QName LANGUAGE = new QName("language");
052:            private static final QName IMPORT = new QName("import");
053:            private static final QName SESSION = new QName("session");
054:            private static final QName BUFFER = new QName("buffer");
055:            private static final QName ERROR_PAGE = new QName("errorPage");
056:            private static final QName IS_ERROR_PAGE = new QName("isErrorPage");
057:            private static final QName AUTO_FLUSH = new QName("autoFlush");
058:            private static final QName IS_THREAD_SAFE = new QName(
059:                    "isThreadSafe");
060:            private static final QName EXTENDS = new QName("extends");
061:            private static final QName TRIM_WS = new QName(
062:                    "trimDirectiveWhitespaces");
063:            private static final QName DEFER = new QName(
064:                    "deferredSyntaxAllowedAsLiteral");
065:
066:            private Boolean _isElIgnored;
067:
068:            /**
069:             * Adds an attribute.
070:             *
071:             * @param name the attribute name
072:             * @param value the attribute value
073:             */
074:            public void addAttribute(QName name, String value)
075:                    throws JspParseException {
076:                if (IS_EL_IGNORED.equals(name)) {
077:                    boolean isIgnored = value.equals("true");
078:
079:                    if (!_parseState.setELIgnored(isIgnored))
080:                        throw error(L.l("isELIgnored values conflict"));
081:
082:                    _parseState.markELIgnoredSet();
083:                }
084:                /*
085:                else if (name.equals("isScriptingInvalid"))
086:                  _parseState.setScriptingInvalid(value.equals("true"));
087:                 */
088:                else if (IS_VELOCITY_ENABLED.equals(name))
089:                    _parseState.setVelocityEnabled(value.equals("true"));
090:                else if (INFO.equals(name)) {
091:                    String oldInfo = _parseState.getInfo();
092:
093:                    if (oldInfo != null && !value.equals(oldInfo))
094:                        throw error(L
095:                                .l(
096:                                        "info '{0}' conflicts with previous value of info '{1}'.  Check the .jsp and any included .jsp files for conflicts.",
097:                                        value, oldInfo));
098:
099:                    _parseState.setInfo(value);
100:                } else if (CONTENT_TYPE.equals(name)) {
101:                    String oldContentType = _parseState.getContentType();
102:
103:                    if (oldContentType != null && !value.equals(oldContentType))
104:                        throw error(L
105:                                .l(
106:                                        "contentType '{0}' conflicts with previous value of contentType '{1}'.  Check the .jsp and any included .jsp files for conflicts.",
107:                                        value, oldContentType));
108:
109:                    _parseState.setContentType(value);
110:                    String charEncoding = parseCharEncoding(value);
111:                    if (charEncoding != null)
112:                        _parseState.setCharEncoding(charEncoding);
113:                } else if (PAGE_ENCODING.equals(name)) {
114:                    String oldEncoding = _parseState.getPageEncoding();
115:
116:                    /*
117:                    // jsp/01f1
118:                    if (oldEncoding != null) {
119:                    String oldCanonical = Encoding.getMimeName(oldEncoding);
120:                    String newCanonical = Encoding.getMimeName(value);
121:
122:                    if (! newCanonical.equals(oldCanonical))
123:                    throw error(L.l("pageEncoding '{0}' conflicts with previous value of pageEncoding '{1}'.  Check the .jsp and any included .jsp files for conflicts.", value, oldEncoding));
124:                    }
125:                     */
126:
127:                    try {
128:                        _parseState.setPageEncoding(value);
129:                        _parseState.setCharEncoding(value);
130:                    } catch (JspParseException e) {
131:                        log.log(Level.FINER, e.toString(), e);
132:
133:                        throw error(e.getMessage());
134:                    }
135:                } else if (LANGUAGE.equals(name)) {
136:                    if (!value.equals("java"))
137:                        throw error(L
138:                                .l(
139:                                        "'{0}' is not supported as a JSP scripting language.",
140:                                        value));
141:                } else if (IMPORT.equals(name)) {
142:                    _parseState.addImport(value);
143:                } else if (SESSION.equals(name)) {
144:                    boolean isValid = false;
145:
146:                    if (value.equals("true"))
147:                        isValid = _parseState.setSession(true);
148:                    else if (value.equals("false"))
149:                        isValid = _parseState.setSession(false);
150:                    else
151:                        throw error(L.l(
152:                                "session expects 'true' or 'false' at '{0}'",
153:                                value));
154:
155:                    _parseState.markSessionSet();
156:
157:                    if (!isValid)
158:                        throw error(L
159:                                .l("session is assigned different values."));
160:                } else if (BUFFER.equals(name)) {
161:                    boolean isValid = _parseState
162:                            .setBuffer(processBufferSize(value));
163:
164:                    _parseState.markBufferSet();
165:
166:                    if (!isValid)
167:                        throw error(L.l("buffer is assigned different values."));
168:
169:                    if (_parseState.getBuffer() == 0
170:                            && !_parseState.isAutoFlush())
171:                        throw error(L
172:                                .l("buffer must be non-zero when autoFlush is false."));
173:                } else if (ERROR_PAGE.equals(name)) {
174:                    String errorPage = _parseState.getErrorPage();
175:
176:                    String newErrorPage = getRelativeUrl(value);
177:
178:                    _parseState.setErrorPage(newErrorPage);
179:
180:                    if (errorPage != null && !errorPage.equals(newErrorPage)) {
181:                        _parseState.setErrorPage(null);
182:                        throw error(L.l(
183:                                "errorPage is assigned different value '{0}'.",
184:                                newErrorPage));
185:                    }
186:                } else if (IS_ERROR_PAGE.equals(name)) {
187:                    boolean isValid = false;
188:
189:                    if (value.equals("true"))
190:                        isValid = _parseState.setErrorPage(true);
191:                    else if (value.equals("false"))
192:                        isValid = _parseState.setErrorPage(false);
193:                    else
194:                        throw error(L
195:                                .l(
196:                                        "isErrorPage expects 'true' or 'false' at '{0}'",
197:                                        value));
198:
199:                    _parseState.markErrorPage();
200:
201:                    if (!isValid)
202:                        throw error(L
203:                                .l("isErrorPage is assigned different values."));
204:                } else if (AUTO_FLUSH.equals(name)) {
205:                    boolean isValid = false;
206:
207:                    if (value.equals("true"))
208:                        isValid = _parseState.setAutoFlush(true);
209:                    else if (value.equals("false"))
210:                        isValid = _parseState.setAutoFlush(false);
211:                    else
212:                        throw error(L.l(
213:                                "autoFlush expects 'true' or 'false' at '{0}'",
214:                                value));
215:
216:                    if (!isValid)
217:                        throw error(L
218:                                .l("autoFlush is assigned different values."));
219:
220:                    if (_parseState.getBuffer() == 0
221:                            && !_parseState.isAutoFlush())
222:                        throw error(L
223:                                .l("buffer must be non-zero when autoFlush is false."));
224:
225:                    _parseState.markAutoFlushSet();
226:                } else if (IS_THREAD_SAFE.equals(name)) {
227:                    boolean isValid = false;
228:
229:                    if (value.equals("true"))
230:                        isValid = _parseState.setThreadSafe(true);
231:                    else if (value.equals("false"))
232:                        isValid = _parseState.setThreadSafe(false);
233:                    else
234:                        throw error(L
235:                                .l(
236:                                        "isThreadSafe expects 'true' or 'false' at '{0}'",
237:                                        value));
238:
239:                    _parseState.markThreadSafeSet();
240:
241:                    if (!isValid)
242:                        throw error(L
243:                                .l("isThreadSafe is assigned different values."));
244:                } else if (EXTENDS.equals(name)) {
245:                    Class cl = null;
246:
247:                    try {
248:                        cl = CauchoSystem.loadClass(value);
249:                    } catch (Exception e) {
250:                        throw error(e);
251:                    }
252:
253:                    if (!HttpJspPage.class.isAssignableFrom(cl))
254:                        throw error(L
255:                                .l(
256:                                        "'{0}' must implement HttpJspPage.  The class named by jsp:directive.page extends='...' must implement HttpJspPage.",
257:                                        value));
258:
259:                    Class oldExtends = _parseState.getExtends();
260:
261:                    if (oldExtends != null && !cl.equals(oldExtends))
262:                        throw error(L
263:                                .l(
264:                                        "extends '{0}' conflicts with previous value of extends '{1}'.  Check the .jsp and any included .jsp files for conflicts.",
265:                                        value, oldExtends.getName()));
266:
267:                    _parseState.setExtends(cl);
268:                } else if (TRIM_WS.equals(name)) {
269:                    if (value.equals("true"))
270:                        _parseState.setTrimWhitespace(true);
271:                    else if (value.equals("false"))
272:                        _parseState.setTrimWhitespace(false);
273:                    else
274:                        throw error(L
275:                                .l(
276:                                        "trimDirectiveWhitespaces expects 'true' or 'false' at '{0}'",
277:                                        value));
278:                } else if (DEFER.equals(name)) {
279:                    if (value.equals("true"))
280:                        _parseState.setDeferredSyntaxAllowedAsLiteral(true);
281:                    else if (value.equals("false"))
282:                        _parseState.setDeferredSyntaxAllowedAsLiteral(false);
283:                    else
284:                        throw error(L
285:                                .l(
286:                                        "deferredSyntaxAllowedAsLiteral expects 'true' or 'false' at '{0}'",
287:                                        value));
288:                } else {
289:                    throw error(L
290:                            .l(
291:                                    "'{0}' is an unknown JSP page directive attribute.  See the JSP documentation for a complete list of page directive attributes.",
292:                                    name.getName()));
293:                }
294:            }
295:
296:            /**
297:             * Parses the buffer size directive, grabbing the size out from the units.
298:             *
299:             * @param value buffer size string.
300:             * @return the size of the buffer in kb.
301:             */
302:            private int processBufferSize(String value)
303:                    throws JspParseException {
304:                if (value.equals("none"))
305:                    return 0;
306:
307:                int i = 0;
308:                int kb = 0;
309:                for (; i < value.length(); i++) {
310:                    char ch = value.charAt(i);
311:                    if (ch >= '0' && ch <= '9')
312:                        kb = 10 * kb + ch - '0';
313:                    else
314:                        break;
315:                }
316:
317:                if (!value.substring(i).equals("kb"))
318:                    throw error(L
319:                            .l(
320:                                    "Expected buffer size at '{0}'.  Buffer sizes must end in 'kb'",
321:                                    value));
322:
323:                return 1024 * kb;
324:            }
325:
326:            protected String getRelativeUrl(String value) {
327:                if (value.length() > 0 && value.charAt(0) == '/')
328:                    return value;
329:                else
330:                    return _parseState.getUriPwd() + value;
331:            }
332:
333:            /**
334:             * Charset can be specific as follows:
335:             *  test/html; z=9; charset=utf8; w=12
336:             */
337:            static String parseCharEncoding(String type)
338:                    throws JspParseException {
339:                type = type.toLowerCase();
340:                int i;
341:                char ch;
342:                while ((i = type.indexOf(';')) >= 0 && i < type.length()) {
343:                    i++;
344:                    while (i < type.length()
345:                            && ((ch = type.charAt(i)) == ' ' || ch == '\t'))
346:                        i++;
347:
348:                    if (i >= type.length())
349:                        return null;
350:
351:                    type = type.substring(i);
352:                    i = type.indexOf('=');
353:                    if (i >= 0) {
354:                        if (!type.startsWith("charset"))
355:                            continue;
356:
357:                        for (i++; i < type.length()
358:                                && ((ch = type.charAt(i)) == ' ' || ch == '\t'); i++) {
359:                        }
360:
361:                        type = type.substring(i);
362:                    }
363:
364:                    for (i = 0; i < type.length()
365:                            && (ch = type.charAt(i)) != ';' && ch != ' '; i++) {
366:                    }
367:
368:                    return type.substring(0, i);
369:                }
370:
371:                return null;
372:            }
373:
374:            /**
375:             * Called when the tag ends.
376:             */
377:            public void endAttributes() throws JspParseException {
378:                if (_gen.isTag())
379:                    throw error(L.l("page directives are forbidden in tags."));
380:            }
381:
382:            /**
383:             * Return true if the node only has static text.
384:             */
385:            public boolean isStatic() {
386:                return true;
387:            }
388:
389:            /**
390:             * Generates the XML text representation for the tag validation.
391:             *
392:             * @param os write stream to the generated XML.
393:             */
394:            public void printXml(WriteStream os) throws IOException {
395:                os.print("<jsp:directive.page");
396:                printJspId(os);
397:                if (!_parseState.isELIgnored())
398:                    os.print(" el-ignored='false'");
399:                /*
400:                if (! _parseState.isScriptingEnabled())
401:                  os.print(" scripting-enabled='false'");
402:                 */
403:                if (_parseState.getContentType() != null)
404:                    os.print(" content-type='" + _parseState.getContentType()
405:                            + "'");
406:
407:                ArrayList<String> imports = _parseState.getImportList();
408:
409:                if (imports != null && imports.size() != 0) {
410:                    os.print(" import='");
411:                    for (int i = 0; i < imports.size(); i++) {
412:                        if (i != 0)
413:                            os.print(',');
414:                        os.print(imports.get(i));
415:                    }
416:                    os.print("'");
417:                }
418:
419:                os.print("/>");
420:            }
421:
422:            /**
423:             * Generates the code for the tag
424:             *
425:             * @param out the output writer for the generated java.
426:             */
427:            public void generate(JspJavaWriter out) throws Exception {
428:            }
429:        }
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