Source Code Cross Referenced for JibxMarshaller.java in  » Web-Services » spring-ws-1.0.0 » org » springframework » oxm » jibx » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Web Services » spring ws 1.0.0 » org.springframework.oxm.jibx 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /*
002:         * Copyright 2006 the original author or authors.
003:         *
004:         * Licensed under the Apache License, Version 2.0 (the "License");
005:         * you may not use this file except in compliance with the License.
006:         * You may obtain a copy of the License at
007:         *
008:         *      http://www.apache.org/licenses/LICENSE-2.0
009:         *
010:         * Unless required by applicable law or agreed to in writing, software
011:         * distributed under the License is distributed on an "AS IS" BASIS,
012:         * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013:         * See the License for the specific language governing permissions and
014:         * limitations under the License.
015:         */
016:
017:        package org.springframework.oxm.jibx;
018:
019:        import java.io.ByteArrayInputStream;
020:        import java.io.ByteArrayOutputStream;
021:        import java.io.IOException;
022:        import java.io.InputStream;
023:        import java.io.OutputStream;
024:        import java.io.Reader;
025:        import java.io.Writer;
026:        import javax.xml.stream.XMLEventReader;
027:        import javax.xml.stream.XMLEventWriter;
028:        import javax.xml.stream.XMLStreamException;
029:        import javax.xml.stream.XMLStreamReader;
030:        import javax.xml.stream.XMLStreamWriter;
031:        import javax.xml.transform.Transformer;
032:        import javax.xml.transform.TransformerException;
033:        import javax.xml.transform.TransformerFactory;
034:        import javax.xml.transform.dom.DOMResult;
035:        import javax.xml.transform.dom.DOMSource;
036:        import javax.xml.transform.sax.SAXResult;
037:        import javax.xml.transform.sax.SAXSource;
038:        import javax.xml.transform.stream.StreamResult;
039:        import javax.xml.transform.stream.StreamSource;
040:
041:        import org.jibx.runtime.BindingDirectory;
042:        import org.jibx.runtime.IBindingFactory;
043:        import org.jibx.runtime.IMarshallingContext;
044:        import org.jibx.runtime.IUnmarshallingContext;
045:        import org.jibx.runtime.IXMLReader;
046:        import org.jibx.runtime.IXMLWriter;
047:        import org.jibx.runtime.JiBXException;
048:        import org.jibx.runtime.impl.MarshallingContext;
049:        import org.jibx.runtime.impl.StAXReaderWrapper;
050:        import org.jibx.runtime.impl.StAXWriter;
051:        import org.jibx.runtime.impl.UnmarshallingContext;
052:        import org.springframework.beans.factory.InitializingBean;
053:        import org.springframework.oxm.AbstractMarshaller;
054:        import org.springframework.oxm.XmlMappingException;
055:        import org.springframework.util.Assert;
056:        import org.springframework.util.StringUtils;
057:        import org.springframework.xml.stream.StaxEventContentHandler;
058:        import org.springframework.xml.stream.XmlEventStreamReader;
059:        import org.w3c.dom.Node;
060:        import org.xml.sax.ContentHandler;
061:        import org.xml.sax.InputSource;
062:        import org.xml.sax.XMLReader;
063:        import org.xml.sax.ext.LexicalHandler;
064:
065:        /**
066:         * Implementation of the <code>Marshaller</code> and <code>Unmarshaller</code> interfaces for JiBX.
067:         * <p/>
068:         * The typical usage will be to set the <code>targetClass</code> and optionally the <code>bindingName</code> property on
069:         * this bean, and to refer to it.
070:         *
071:         * @author Arjen Poutsma
072:         * @see org.jibx.runtime.IMarshallingContext
073:         * @see org.jibx.runtime.IUnmarshallingContext
074:         * @since 1.0.0
075:         */
076:        public class JibxMarshaller extends AbstractMarshaller implements 
077:                InitializingBean {
078:
079:            private Class targetClass;
080:
081:            private String bindingName;
082:
083:            private IBindingFactory bindingFactory;
084:
085:            private TransformerFactory transfomerFactory;
086:
087:            private int indent = -1;
088:
089:            private String encoding;
090:
091:            private Boolean standalone;
092:
093:            /** Sets the optional binding name for this instance. */
094:            public void setBindingName(String bindingName) {
095:                this .bindingName = bindingName;
096:            }
097:
098:            /** Sets the target class for this instance. This property is required. */
099:            public void setTargetClass(Class targetClass) {
100:                this .targetClass = targetClass;
101:            }
102:
103:            /** Sets the number of nesting indent spaces. Default is <code>-1</code>, i.e. no indentation. */
104:            public void setIndent(int indent) {
105:                this .indent = indent;
106:            }
107:
108:            /** Sets the document encoding using for marshalling. Default is UTF-8. */
109:            public void setEncoding(String encoding) {
110:                this .encoding = encoding;
111:            }
112:
113:            /** Sets the document standalone flag for marshalling. By default, this flag is not present. */
114:            public void setStandalone(Boolean standalone) {
115:                this .standalone = standalone;
116:            }
117:
118:            public void afterPropertiesSet() throws Exception {
119:                Assert.notNull(targetClass, "targetClass is required");
120:                if (logger.isInfoEnabled()) {
121:                    if (StringUtils.hasLength(bindingName)) {
122:                        logger.info("Configured for target class ["
123:                                + targetClass + "] using binding ["
124:                                + bindingName + "]");
125:                    } else {
126:                        logger.info("Configured for target class ["
127:                                + targetClass + "]");
128:                    }
129:                }
130:                try {
131:                    if (StringUtils.hasLength(bindingName)) {
132:                        bindingFactory = BindingDirectory.getFactory(
133:                                bindingName, targetClass);
134:                    } else {
135:                        bindingFactory = BindingDirectory
136:                                .getFactory(targetClass);
137:                    }
138:                } catch (JiBXException ex) {
139:                    throw new JibxSystemException(ex);
140:                }
141:                transfomerFactory = TransformerFactory.newInstance();
142:            }
143:
144:            public boolean supports(Class clazz) {
145:                return targetClass.isAssignableFrom(clazz);
146:            }
147:
148:            /**
149:             * Convert the given <code>JiBXException</code> to an appropriate exception from the
150:             * <code>org.springframework.oxm</code> hierarchy.
151:             * <p/>
152:             * The default implementation delegates to <code>JibxUtils</code>. Can be overridden in subclasses.
153:             * <p/>
154:             * A boolean flag is used to indicate whether this exception occurs during marshalling or unmarshalling, since JiBX
155:             * itself does not make this distinction in its exception hierarchy.
156:             *
157:             * @param ex          <code>JiBXException</code> that occured
158:             * @param marshalling indicates whether the exception occurs during marshalling (<code>true</code>), or
159:             *                    unmarshalling (<code>false</code>)
160:             * @return the corresponding <code>XmlMappingException</code> instance
161:             * @see JibxUtils#convertJibxException(org.jibx.runtime.JiBXException,boolean)
162:             */
163:            public XmlMappingException convertJibxException(JiBXException ex,
164:                    boolean marshalling) {
165:                return JibxUtils.convertJibxException(ex, marshalling);
166:            }
167:
168:            //
169:            // Supported Marshalling
170:            //
171:
172:            protected void marshalOutputStream(Object graph,
173:                    OutputStream outputStream) throws XmlMappingException,
174:                    IOException {
175:                try {
176:                    IMarshallingContext marshallingContext = createMarshallingContext();
177:                    marshallingContext.marshalDocument(graph, encoding,
178:                            standalone, outputStream);
179:                } catch (JiBXException ex) {
180:                    throw convertJibxException(ex, true);
181:                }
182:            }
183:
184:            protected void marshalWriter(Object graph, Writer writer)
185:                    throws XmlMappingException, IOException {
186:                try {
187:                    IMarshallingContext marshallingContext = createMarshallingContext();
188:                    marshallingContext.marshalDocument(graph, encoding,
189:                            standalone, writer);
190:                } catch (JiBXException ex) {
191:                    throw convertJibxException(ex, true);
192:                }
193:            }
194:
195:            protected void marshalXmlStreamWriter(Object graph,
196:                    XMLStreamWriter streamWriter) throws XmlMappingException {
197:                try {
198:                    MarshallingContext marshallingContext = (MarshallingContext) createMarshallingContext();
199:                    IXMLWriter xmlWriter = new StAXWriter(marshallingContext
200:                            .getNamespaces(), streamWriter);
201:                    marshallingContext.setXmlWriter(xmlWriter);
202:                    marshallingContext.marshalDocument(graph);
203:                } catch (JiBXException ex) {
204:                    throw convertJibxException(ex, false);
205:                }
206:            }
207:
208:            //
209:            // Unsupported Marshalling
210:            //
211:
212:            protected void marshalDomNode(Object graph, Node node)
213:                    throws XmlMappingException {
214:                try {
215:                    // JiBX does not support DOM natively, so we write to a buffer first, and transform that to the Node
216:                    ByteArrayOutputStream os = new ByteArrayOutputStream();
217:                    marshalOutputStream(graph, os);
218:                    ByteArrayInputStream is = new ByteArrayInputStream(os
219:                            .toByteArray());
220:                    Transformer transformer = transfomerFactory
221:                            .newTransformer();
222:                    transformer.transform(new StreamSource(is), new DOMResult(
223:                            node));
224:                } catch (IOException ex) {
225:                    throw new JibxSystemException(ex);
226:                } catch (TransformerException ex) {
227:                    throw new JibxSystemException(ex);
228:                }
229:            }
230:
231:            protected void marshalSaxHandlers(Object graph,
232:                    ContentHandler contentHandler, LexicalHandler lexicalHandler)
233:                    throws XmlMappingException {
234:                try {
235:                    // JiBX does not support SAX natively, so we write to a buffer first, and transform that to the handlers
236:                    ByteArrayOutputStream os = new ByteArrayOutputStream();
237:                    marshalOutputStream(graph, os);
238:                    ByteArrayInputStream is = new ByteArrayInputStream(os
239:                            .toByteArray());
240:                    Transformer transformer = transfomerFactory
241:                            .newTransformer();
242:                    SAXResult saxResult = new SAXResult(contentHandler);
243:                    saxResult.setLexicalHandler(lexicalHandler);
244:                    transformer.transform(new StreamSource(is), saxResult);
245:                } catch (IOException ex) {
246:                    throw new JibxSystemException(ex);
247:                } catch (TransformerException ex) {
248:                    throw new JibxSystemException(ex);
249:                }
250:            }
251:
252:            protected void marshalXmlEventWriter(Object graph,
253:                    XMLEventWriter eventWriter) {
254:                ContentHandler contentHandler = new StaxEventContentHandler(
255:                        eventWriter);
256:                marshalSaxHandlers(graph, contentHandler, null);
257:            }
258:
259:            //
260:            // Unmarshalling
261:            //
262:
263:            protected Object unmarshalInputStream(InputStream inputStream)
264:                    throws XmlMappingException, IOException {
265:                try {
266:                    IUnmarshallingContext unmarshallingContext = createUnmarshallingContext();
267:                    return unmarshallingContext.unmarshalDocument(inputStream,
268:                            null);
269:                } catch (JiBXException ex) {
270:                    throw convertJibxException(ex, false);
271:                }
272:            }
273:
274:            protected Object unmarshalReader(Reader reader)
275:                    throws XmlMappingException, IOException {
276:                try {
277:                    IUnmarshallingContext unmarshallingContext = createUnmarshallingContext();
278:                    return unmarshallingContext.unmarshalDocument(reader);
279:                } catch (JiBXException ex) {
280:                    throw convertJibxException(ex, false);
281:                }
282:            }
283:
284:            protected Object unmarshalXmlStreamReader(
285:                    XMLStreamReader streamReader) {
286:                try {
287:                    UnmarshallingContext unmarshallingContext = (UnmarshallingContext) createUnmarshallingContext();
288:                    IXMLReader xmlReader = new StAXReaderWrapper(streamReader,
289:                            null, true);
290:                    unmarshallingContext.setDocument(xmlReader);
291:                    return unmarshallingContext.unmarshalElement();
292:                } catch (JiBXException ex) {
293:                    throw convertJibxException(ex, false);
294:                }
295:            }
296:
297:            protected Object unmarshalXmlEventReader(XMLEventReader eventReader) {
298:                try {
299:                    XMLStreamReader streamReader = new XmlEventStreamReader(
300:                            eventReader);
301:                    return unmarshalXmlStreamReader(streamReader);
302:                } catch (XMLStreamException ex) {
303:                    throw new JibxSystemException(ex);
304:                }
305:            }
306:
307:            //
308:            // Unsupported Unmarshalling
309:            //
310:
311:            protected Object unmarshalDomNode(Node node)
312:                    throws XmlMappingException {
313:                try {
314:                    Transformer transformer = transfomerFactory
315:                            .newTransformer();
316:                    ByteArrayOutputStream os = new ByteArrayOutputStream();
317:                    transformer.transform(new DOMSource(node),
318:                            new StreamResult(os));
319:                    ByteArrayInputStream is = new ByteArrayInputStream(os
320:                            .toByteArray());
321:                    return unmarshalInputStream(is);
322:                } catch (IOException ex) {
323:                    throw new JibxSystemException(ex);
324:                } catch (TransformerException ex) {
325:                    throw new JibxSystemException(ex);
326:                }
327:            }
328:
329:            protected Object unmarshalSaxReader(XMLReader xmlReader,
330:                    InputSource inputSource) throws XmlMappingException,
331:                    IOException {
332:                try {
333:                    Transformer transformer = transfomerFactory
334:                            .newTransformer();
335:                    ByteArrayOutputStream os = new ByteArrayOutputStream();
336:                    transformer.transform(
337:                            new SAXSource(xmlReader, inputSource),
338:                            new StreamResult(os));
339:                    ByteArrayInputStream is = new ByteArrayInputStream(os
340:                            .toByteArray());
341:                    return unmarshalInputStream(is);
342:                } catch (IOException ex) {
343:                    throw new JibxSystemException(ex);
344:                } catch (TransformerException ex) {
345:                    throw new JibxSystemException(ex);
346:                }
347:            }
348:
349:            /**
350:             * Creates a new <code>IMarshallingContext</code>, set with the correct indentation.
351:             *
352:             * @return the created marshalling context
353:             * @throws JiBXException in case of errors
354:             */
355:            protected IMarshallingContext createMarshallingContext()
356:                    throws JiBXException {
357:                IMarshallingContext marshallingContext = bindingFactory
358:                        .createMarshallingContext();
359:                marshallingContext.setIndent(indent);
360:                return marshallingContext;
361:            }
362:
363:            /**
364:             * Creates a new <code>IUnmarshallingContext</code>, set with the correct indentation.
365:             *
366:             * @return the created unmarshalling context
367:             * @throws JiBXException in case of errors
368:             */
369:            protected IUnmarshallingContext createUnmarshallingContext()
370:                    throws JiBXException {
371:                return bindingFactory.createUnmarshallingContext();
372:            }
373:
374:        }
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