Source Code Cross Referenced for SAXMarshaller.java in  » Portal » stringbeans-3.5 » com » nabhinc » portal » config » impl » runtime » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Portal » stringbeans 3.5 » com.nabhinc.portal.config.impl.runtime 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        //
002:        // This file was generated by the JavaTM Architecture for XML Binding(JAXB) Reference Implementation, v1.0.4-b18-fcs 
003:        // See <a href="http://java.sun.com/xml/jaxb">http://java.sun.com/xml/jaxb</a> 
004:        // Any modifications to this file will be lost upon recompilation of the source schema. 
005:        // Generated on: 2005.03.04 at 10:20:40 PST 
006:        //
007:
008:        package com.nabhinc.portal.config.impl.runtime;
009:
010:        import java.util.HashSet;
011:        import java.util.Iterator;
012:        import java.util.Set;
013:
014:        import javax.xml.bind.JAXBException;
015:        import javax.xml.bind.ValidationEvent;
016:        import javax.xml.bind.ValidationEventHandler;
017:        import javax.xml.bind.helpers.NotIdentifiableEventImpl;
018:        import javax.xml.bind.helpers.ValidationEventLocatorImpl;
019:
020:        import org.xml.sax.ContentHandler;
021:        import org.xml.sax.SAXException;
022:        import org.xml.sax.helpers.AttributesImpl;
023:
024:        import com.sun.xml.bind.JAXBAssertionError;
025:        import com.sun.xml.bind.JAXBObject;
026:        import com.sun.xml.bind.marshaller.IdentifiableObject;
027:        import com.sun.xml.bind.marshaller.Messages;
028:        import com.sun.xml.bind.marshaller.NamespacePrefixMapper;
029:        import com.sun.xml.bind.serializer.AbortSerializationException;
030:        import com.sun.xml.bind.serializer.Util;
031:
032:        /**
033:         * XMLSerializer that produces SAX2 events.
034:         * 
035:         * To marshal an object, create an instance of SAXMarshaller
036:         * and call the serializeElements method of the XMLSerializable
037:         * object that you want to marshal.
038:         * 
039:         * @author  Kohsuke Kawaguchi
040:         */
041:        public class SAXMarshaller implements  XMLSerializer {
042:            /**
043:             * "Attributes" object that is passed to the startElement event.
044:             * One object is reused throughout the marshalling.
045:             */
046:            private final AttributesImpl attributes = new AttributesImpl();
047:
048:            /** This object receives SAX2 events generated from the marshaller. */
049:            private final ContentHandler writer;
050:
051:            /** Marshaller object to which this object belongs. */
052:            private final MarshallerImpl owner;
053:
054:            /** Objects referenced through IDREF. */
055:            private final Set idReferencedObjects = new HashSet();
056:
057:            /** Objects with ID. */
058:            private final Set objectsWithId = new HashSet();
059:
060:            /** Object currently marshalling itself. */
061:            private JAXBObject currentTarget;
062:
063:            /**
064:             * Creates a marshalling context by designating the ContentHandler
065:             * that receives generated SAX2 events.
066:             */
067:            public SAXMarshaller(ContentHandler _writer,
068:                    NamespacePrefixMapper prefixMapper, MarshallerImpl _owner) {
069:                this .writer = _writer;
070:                this .owner = _owner;
071:                this .nsContext = new NamespaceContextImpl(
072:                        prefixMapper != null ? prefixMapper
073:                                : defaultNamespacePrefixMapper);
074:            }
075:
076:            /** namespace context. */
077:            private final NamespaceContextImpl nsContext;
078:
079:            public NamespaceContext2 getNamespaceContext() {
080:                return nsContext;
081:            }
082:
083:            //
084:            //
085:            // name stack
086:            //
087:            //
088:
089:            /** Element name stack implemented as an array of (uri,local) pairs. */
090:            private String[] elementStack = new String[16];;
091:            private int elementLen = 0;
092:
093:            private void pushElement(String uri, String local) {
094:                if (elementStack.length == elementLen) {
095:                    // reallocate buffer
096:                    String[] buf = new String[elementStack.length * 2];
097:                    System.arraycopy(elementStack, 0, buf, 0,
098:                            elementStack.length);
099:                    elementStack = buf;
100:                }
101:                elementStack[elementLen++] = uri;
102:                elementStack[elementLen++] = local;
103:            }
104:
105:            private void popElement() {
106:                elementLen -= 2;
107:            }
108:
109:            private String getCurrentElementUri() {
110:                return elementStack[elementLen - 2];
111:            }
112:
113:            private String getCurrentElementLocal() {
114:                return elementStack[elementLen - 1];
115:            }
116:
117:            /**
118:             * Starts marshalling of an element.
119:             * Calling this method will push the internal state into the
120:             * internal stack.
121:             */
122:            public void startElement(String uri, String local)
123:                    throws SAXException {
124:                boolean isRoot = false;
125:                String suggestion = null;
126:                if (elementLen == 0) {
127:                    isRoot = true;
128:                    // this is the root element. suggest this as the default namespace
129:                    suggestion = "";
130:                }
131:
132:                writePendingText();
133:                nsContext.startElement();
134:                pushElement(uri, local); // memorize element name
135:
136:                // declare this uri
137:                nsContext.declareNamespace(uri, suggestion, false);
138:
139:                // if this is the root element, declare user-specified namespace URIs.
140:                if (isRoot) {
141:                    // work defensively. we are calling an user-defined method.
142:                    String[] uris = nsContext.getNamespacePrefixMapper()
143:                            .getPreDeclaredNamespaceUris();
144:                    if (uris != null) {
145:                        for (int i = 0; i < uris.length; i++) {
146:                            if (uris[i] != null)
147:                                nsContext
148:                                        .declareNamespace(uris[i], null, false);
149:                        }
150:                    }
151:                }
152:            }
153:
154:            private final PrefixCallback startPrefixCallback = new PrefixCallback() {
155:                public void onPrefixMapping(String prefix, String nsUri)
156:                        throws SAXException {
157:                    writer.startPrefixMapping(prefix, nsUri);
158:                }
159:            };
160:            private final PrefixCallback endPrefixCallback = new PrefixCallback() {
161:                public void onPrefixMapping(String prefix, String nsUri)
162:                        throws SAXException {
163:                    writer.endPrefixMapping(prefix);
164:                }
165:            };
166:
167:            public void endNamespaceDecls() throws SAXException {
168:                nsContext.endNamespaceDecls();
169:            }
170:
171:            /**
172:             * Switches to the "marshal child texts/elements" mode.
173:             * This method has to be called after the 1st pass is completed.
174:             */
175:            public void endAttributes() throws SAXException {
176:                // calculate QName of the element
177:                String uri = getCurrentElementUri();
178:                String local = getCurrentElementLocal();
179:
180:                String prefix = nsContext.getPrefix(uri);
181:                _assert(prefix != null); // since we've declared it, it should be available
182:
183:                String qname;
184:                if (prefix.length() != 0)
185:                    qname = prefix + ':' + local;
186:                else
187:                    qname = local;
188:
189:                // fire startPrefixMapping events
190:                nsContext.iterateDeclaredPrefixes(startPrefixCallback);
191:
192:                // fire the startElement event
193:                writer.startElement(uri, local, qname, attributes);
194:
195:                // reset attributes
196:                attributes.clear();
197:
198:                // prepare to collect texts
199:                textBuf.setLength(0);
200:            }
201:
202:            /**
203:             * Ends marshalling of an element.
204:             * Pops the internal stack.
205:             */
206:            public void endElement() throws SAXException {
207:                writePendingText();
208:
209:                String uri = getCurrentElementUri();
210:                String local = getCurrentElementLocal();
211:
212:                String prefix = nsContext.getPrefix(uri);
213:                _assert(prefix != null); // we've declared it earlier.
214:
215:                String qname;
216:                if (prefix.length() != 0)
217:                    qname = prefix + ':' + local;
218:                else
219:                    qname = local;
220:
221:                writer.endElement(uri, local, qname);
222:
223:                // pop namespace bindings and
224:                // fire endPrefixMapping events
225:                nsContext.iterateDeclaredPrefixes(endPrefixCallback);
226:
227:                popElement();
228:
229:                // prepare to collect texts
230:                textBuf.setLength(0);
231:
232:                nsContext.endElement();
233:            }
234:
235:            /** Buffer for collecting characters. */
236:            private final StringBuffer textBuf = new StringBuffer();
237:
238:            /**
239:             * Marshalls text.
240:             * 
241:             * <p>
242:             * This method can be called (i) after the startAttribute method
243:             * and (ii) before the endAttribute method, to marshal attribute values.
244:             * If the method is called more than once, those texts are considered
245:             * as separated by whitespaces. For example,
246:             * 
247:             * <pre>
248:             * c.startAttribute();
249:             * c.text("abc");
250:             * c.text("def");
251:             * c.endAttribute("","foo");
252:             * </pre>
253:             * 
254:             * will generate foo="abc def".
255:             * 
256:             * <p>
257:             * Similarly, this method can be called after the endAttributes
258:             * method to marshal texts inside elements. The same rule about
259:             * multiple invokations apply to this case, too. For example,
260:             * 
261:             * <pre>
262:             * c.startElement("","foo");
263:             * c.endAttributes();
264:             * c.text("abc");
265:             * c.text("def");
266:             *   c.startElement("","bar");
267:             *   c.endAttributes();
268:             *   c.endElement();
269:             * c.text("ghi");
270:             * c.endElement();
271:             * </pre>
272:             * 
273:             * will generate <code>&lt;foo>abc def&lt;bar/>ghi&lt;/foo></code>.
274:             */
275:            public void text(String text, String fieldName) throws SAXException {
276:                // If the assertion fails, it must be a bug of xjc.
277:                // right now, we are not expecting the text method to be called.
278:                if (text == null) {
279:                    reportError(Util.createMissingObjectError(currentTarget,
280:                            fieldName));
281:                    return;
282:                }
283:
284:                if (textBuf.length() != 0)
285:                    textBuf.append(' ');
286:                textBuf.append(text);
287:            }
288:
289:            /**
290:             * Writes pending text (characters inside elements) to the writer.
291:             * This method is called from startElement and endElement.
292:             */
293:            private void writePendingText() throws SAXException {
294:                // assert(textBuf!=null);
295:                int len = textBuf.length();
296:
297:                if (len != 0)
298:                    writer.characters(textBuf.toString().toCharArray(), 0, len);
299:            }
300:
301:            /**
302:             * Starts marshalling of an attribute.
303:             * 
304:             * The marshalling of an attribute will be done by
305:             * <ol>
306:             *  <li>call the startAttribute method
307:             *  <li>call the text method (several times if necessary)
308:             *  <li>call the endAttribute method
309:             * </ol>
310:             * 
311:             * No two attributes can be marshalled at the same time.
312:             * Note that the whole attribute marshalling must be happened
313:             * after the startElement method and before the endAttributes method.
314:             */
315:            public void startAttribute(String uri, String local) {
316:                // initialize the buffer to collect attribute value
317:                textBuf.setLength(0);
318:
319:                // remember the attribute name. We'll use this value later.
320:                this .attNamespaceUri = uri;
321:                this .attLocalName = local;
322:            }
323:
324:            // used to keep attribute names until the endAttribute method is called.
325:            private String attNamespaceUri;
326:            private String attLocalName;
327:
328:            public void endAttribute() {
329:                // use CDATA as the attribute type. This preserves
330:                // successive processors to collapse whitespaces.
331:                // (we cannot prevent characters like #xD to be replaced to
332:                // #x20, though).
333:                //
334:                // strictly speaking, attribute value normalization should be
335:                // provessed by XML parser, so it's unclear whether XML writer
336:                // uses this type value.
337:                //
338:                // in any way, CDATA type is the safest choice here.
339:
340:                String qname;
341:                if (attNamespaceUri.length() == 0) {
342:                    // default namespace. don't need prefix
343:                    qname = attLocalName;
344:                } else {
345:                    qname = nsContext.declareNamespace(attNamespaceUri, null,
346:                            true)
347:                            + ':' + attLocalName;
348:                }
349:
350:                attributes.addAttribute(attNamespaceUri, attLocalName, qname,
351:                        "CDATA", textBuf.toString());
352:            }
353:
354:            public String onID(IdentifiableObject owner, String value)
355:                    throws SAXException {
356:                objectsWithId.add(owner);
357:                return value;
358:            }
359:
360:            public String onIDREF(IdentifiableObject obj) throws SAXException {
361:                idReferencedObjects.add(obj);
362:                String id = obj.____jaxb____getId();
363:                if (id == null) {
364:                    reportError(new NotIdentifiableEventImpl(
365:                            ValidationEvent.ERROR, Messages
366:                                    .format(Messages.ERR_NOT_IDENTIFIABLE),
367:                            new ValidationEventLocatorImpl(obj)));
368:                }
369:                return id;
370:            }
371:
372:            void reconcileID() throws AbortSerializationException {
373:                // find objects that were not a part of the object graph 
374:                idReferencedObjects.removeAll(objectsWithId);
375:
376:                for (Iterator itr = idReferencedObjects.iterator(); itr
377:                        .hasNext();) {
378:                    IdentifiableObject o = (IdentifiableObject) itr.next();
379:                    reportError(new NotIdentifiableEventImpl(
380:                            ValidationEvent.ERROR, Messages.format(
381:                                    Messages.ERR_DANGLING_IDREF, o
382:                                            .____jaxb____getId()),
383:                            new ValidationEventLocatorImpl(o)));
384:                }
385:
386:                // clear the garbage
387:                idReferencedObjects.clear();
388:                objectsWithId.clear();
389:            }
390:
391:            public void childAsBody(JAXBObject o, String fieldName)
392:                    throws SAXException {
393:                if (o == null) {
394:                    // if null is passed, it usually means that the content tree object
395:                    // doesn't have some of its required property.
396:                    reportMissingObjectError(fieldName);
397:                    // as a marshaller, we should be generous, so we'll continue to marshal
398:                    // this document by skipping this missing object.
399:                    return;
400:                }
401:
402:                JAXBObject oldTarget = currentTarget;
403:                currentTarget = o;
404:
405:                owner.context.getGrammarInfo().castToXMLSerializable(o)
406:                        .serializeBody(this );
407:
408:                currentTarget = oldTarget;
409:            }
410:
411:            public void childAsAttributes(JAXBObject o, String fieldName)
412:                    throws SAXException {
413:                if (o == null) {
414:                    reportMissingObjectError(fieldName);
415:                    return;
416:                }
417:
418:                JAXBObject oldTarget = currentTarget;
419:                currentTarget = o;
420:
421:                owner.context.getGrammarInfo().castToXMLSerializable(o)
422:                        .serializeAttributes(this );
423:
424:                currentTarget = oldTarget;
425:            }
426:
427:            public void childAsURIs(JAXBObject o, String fieldName)
428:                    throws SAXException {
429:                if (o == null) {
430:                    reportMissingObjectError(fieldName);
431:                    return;
432:                }
433:
434:                JAXBObject oldTarget = currentTarget;
435:                currentTarget = o;
436:
437:                owner.context.getGrammarInfo().castToXMLSerializable(o)
438:                        .serializeURIs(this );
439:
440:                currentTarget = oldTarget;
441:            }
442:
443:            public void reportError(ValidationEvent ve)
444:                    throws AbortSerializationException {
445:                ValidationEventHandler handler;
446:
447:                try {
448:                    handler = owner.getEventHandler();
449:                } catch (JAXBException e) {
450:                    throw new AbortSerializationException(e);
451:                }
452:
453:                if (!handler.handleEvent(ve)) {
454:                    if (ve.getLinkedException() instanceof  Exception)
455:                        throw new AbortSerializationException((Exception) ve
456:                                .getLinkedException());
457:                    else
458:                        throw new AbortSerializationException(ve.getMessage());
459:                }
460:            }
461:
462:            public void reportMissingObjectError(String fieldName)
463:                    throws SAXException {
464:                reportError(Util.createMissingObjectError(currentTarget,
465:                        fieldName));
466:            }
467:
468:            private static void _assert(boolean b) {
469:                if (!b)
470:                    throw new JAXBAssertionError();
471:            }
472:
473:            /**
474:             * Default {@link NamespacePrefixMapper} implementation used when
475:             * it is not specified by the user.
476:             */
477:            private static NamespacePrefixMapper defaultNamespacePrefixMapper = new NamespacePrefixMapper() {
478:                public String getPreferredPrefix(String namespaceUri,
479:                        String suggestion, boolean requirePrefix) {
480:                    if (namespaceUri
481:                            .equals("http://www.w3.org/2001/XMLSchema-instance"))
482:                        return "xsi";
483:                    return suggestion;
484:                }
485:            };
486:        }
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