/*
* Copyright 2002-2011 the original author or authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.springframework.oxm.jibx;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.io.Reader;
import java.io.Writer;
import javax.xml.stream.XMLEventReader;
import javax.xml.stream.XMLEventWriter;
import javax.xml.stream.XMLStreamException;
import javax.xml.stream.XMLStreamReader;
import javax.xml.stream.XMLStreamWriter;
import javax.xml.transform.Result;
import javax.xml.transform.Source;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerException;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.dom.DOMResult;
import javax.xml.transform.dom.DOMSource;
import javax.xml.transform.sax.SAXResult;
import javax.xml.transform.sax.SAXSource;
import javax.xml.transform.stream.StreamResult;
import javax.xml.transform.stream.StreamSource;
import org.jibx.runtime.BindingDirectory;
import org.jibx.runtime.IBindingFactory;
import org.jibx.runtime.IMarshallingContext;
import org.jibx.runtime.IUnmarshallingContext;
import org.jibx.runtime.IXMLReader;
import org.jibx.runtime.IXMLWriter;
import org.jibx.runtime.JiBXException;
import org.jibx.runtime.ValidationException;
import org.jibx.runtime.impl.MarshallingContext;
import org.jibx.runtime.impl.StAXReaderWrapper;
import org.jibx.runtime.impl.StAXWriter;
import org.jibx.runtime.impl.UnmarshallingContext;
import org.w3c.dom.Node;
import org.xml.sax.ContentHandler;
import org.xml.sax.InputSource;
import org.xml.sax.XMLReader;
import org.xml.sax.ext.LexicalHandler;
import org.springframework.beans.factory.InitializingBean;
import org.springframework.oxm.MarshallingFailureException;
import org.springframework.oxm.UnmarshallingFailureException;
import org.springframework.oxm.ValidationFailureException;
import org.springframework.oxm.XmlMappingException;
import org.springframework.oxm.support.AbstractMarshaller;
import org.springframework.util.Assert;
import org.springframework.util.ClassUtils;
import org.springframework.util.StringUtils;
import org.springframework.util.xml.StaxUtils;
/**
* Implementation of the <code>Marshaller</code> and <code>Unmarshaller</code> interfaces for JiBX.
*
* <p>The typical usage will be to set the <code>targetClass</code> and optionally the
* <code>bindingName</code> property on this bean.
*
* @author Arjen Poutsma
* @since 3.0
* @see org.jibx.runtime.IMarshallingContext
* @see org.jibx.runtime.IUnmarshallingContext
*/
public class JibxMarshaller extends AbstractMarshaller implements InitializingBean {
private static final String DEFAULT_BINDING_NAME = "binding";
private Class<?> targetClass;
private String targetPackage;
private String bindingName;
private int indent = -1;
private String encoding = "UTF-8";
private Boolean standalone;
private String docTypeRootElementName;
private String docTypeSystemId;
private String docTypePublicId;
private String docTypeInternalSubset;
private IBindingFactory bindingFactory;
private TransformerFactory transformerFactory = TransformerFactory.newInstance();
/**
* Set the target class for this instance. Setting either this property or the
* {@link #setTargetPackage(String) targetPackage} property is required.
*
* <p>If this property is set, {@link #setTargetPackage(String) targetPackage} is ignored.
*/
public void setTargetClass(Class<?> targetClass) {
this.targetClass = targetClass;
}
/**
* Set the target package for this instance. Setting either this property or the
* {@link #setTargetClass(Class) targetClass} property is required.
*
* <p>If {@link #setTargetClass(Class) targetClass} is set, this property is ignored.
*/
public void setTargetPackage(String targetPackage) {
this.targetPackage = targetPackage;
}
/**
* Set the optional binding name for this instance.
*/
public void setBindingName(String bindingName) {
this.bindingName = bindingName;
}
/**
* Set the number of nesting indent spaces. Default is <code>-1</code>, i.e. no indentation.
*/
public void setIndent(int indent) {
this.indent = indent;
}
/**
* Set the document encoding using for marshalling. Default is UTF-8.
*/
public void setEncoding(String encoding) {
this.encoding = encoding;
}
/**
* Set the document standalone flag for marshalling. By default, this flag is not present.
*/
public void setStandalone(Boolean standalone) {
this.standalone = standalone;
}
/**
* Sets the root element name for the DTD declaration written when marshalling. By default, this is
* {@code null} (i.e. no DTD declaration is written). If set to a value, the system ID or public ID also need to
* be set.
*
* @see #setDocTypeSystemId(String)
* @see #setDocTypePublicId(String)
*/
public void setDocTypeRootElementName(String docTypeRootElementName) {
this.docTypeRootElementName = docTypeRootElementName;
}
/**
* Sets the system Id for the DTD declaration written when marshalling. By default, this is
* {@code null}. Only used when the root element also has been set. Set either this property or
* {@code docTypePublicId}, not both.
*
* @see #setDocTypeRootElementName(String)
*/
public void setDocTypeSystemId(String docTypeSystemId) {
this.docTypeSystemId = docTypeSystemId;
}
/**
* Sets the public Id for the DTD declaration written when marshalling. By default, this is
* {@code null}. Only used when the root element also has been set. Set either this property or
* {@code docTypeSystemId}, not both.
*
* @see #setDocTypeRootElementName(String)
*/
public void setDocTypePublicId(String docTypePublicId) {
this.docTypePublicId = docTypePublicId;
}
/**
* Sets the internal subset Id for the DTD declaration written when marshalling. By default, this is
* {@code null}. Only used when the root element also has been set.
*
* @see #setDocTypeRootElementName(String)
*/
public void setDocTypeInternalSubset(String docTypeInternalSubset) {
this.docTypeInternalSubset = docTypeInternalSubset;
}
public void afterPropertiesSet() throws JiBXException {
if (this.targetClass != null) {
if (StringUtils.hasLength(this.bindingName)) {
if (logger.isInfoEnabled()) {
logger.info("Configured for target class [" + this.targetClass + "] using binding [" + this.bindingName + "]");
}
this.bindingFactory = BindingDirectory.getFactory(this.bindingName, this.targetClass);
}
else {
if (logger.isInfoEnabled()) {
logger.info("Configured for target class [" + this.targetClass + "]");
}
this.bindingFactory = BindingDirectory.getFactory(this.targetClass);
}
} else if (this.targetPackage != null) {
if (!StringUtils.hasLength(bindingName)) {
bindingName = DEFAULT_BINDING_NAME;
}
if (logger.isInfoEnabled()) {
logger.info("Configured for target package [" + targetPackage + "] using binding [" + bindingName + "]");
}
this.bindingFactory = BindingDirectory.getFactory(bindingName, targetPackage);
} else {
throw new IllegalArgumentException("either 'targetClass' or 'targetPackage' is required");
}
}
public boolean supports(Class<?> clazz) {
Assert.notNull(clazz, "'clazz' must not be null");
if (this.targetClass != null) {
return this.targetClass.equals(clazz);
}
String[] mappedClasses = this.bindingFactory.getMappedClasses();
String className = clazz.getName();
for (String mappedClass : mappedClasses) {
if (className.equals(mappedClass)) {
return true;
}
}
return false;
}
// Supported Marshalling
@Override
protected void marshalOutputStream(Object graph, OutputStream outputStream)
throws XmlMappingException, IOException {
try {
IMarshallingContext marshallingContext = createMarshallingContext();
marshallingContext.startDocument(this.encoding, this.standalone, outputStream);
marshalDocument(marshallingContext, graph);
}
catch (JiBXException ex) {
throw convertJibxException(ex, true);
}
}
@Override
protected void marshalWriter(Object graph, Writer writer) throws XmlMappingException, IOException {
try {
IMarshallingContext marshallingContext = createMarshallingContext();
marshallingContext.startDocument(this.encoding, this.standalone, writer);
marshalDocument(marshallingContext, graph);
}
catch (JiBXException ex) {
throw convertJibxException(ex, true);
}
}
private void marshalDocument(IMarshallingContext marshallingContext, Object graph) throws IOException,
JiBXException {
if (StringUtils.hasLength(docTypeRootElementName)) {
IXMLWriter xmlWriter = marshallingContext.getXmlWriter();
xmlWriter.writeDocType(docTypeRootElementName, docTypeSystemId, docTypePublicId, docTypeInternalSubset);
}
marshallingContext.marshalDocument(graph);
}
@Override
protected void marshalXmlStreamWriter(Object graph, XMLStreamWriter streamWriter) throws XmlMappingException {
try {
MarshallingContext marshallingContext = (MarshallingContext) createMarshallingContext();
IXMLWriter xmlWriter = new StAXWriter(marshallingContext.getNamespaces(), streamWriter);
marshallingContext.setXmlWriter(xmlWriter);
marshallingContext.marshalDocument(graph);
}
catch (JiBXException ex) {
throw convertJibxException(ex, false);
}
}
// Unsupported Marshalling
@Override
protected void marshalDomNode(Object graph, Node node) throws XmlMappingException {
try {
// JiBX does not support DOM natively, so we write to a buffer first, and transform that to the Node
Result result = new DOMResult(node);
transformAndMarshal(graph, result);
}
catch (IOException ex) {
throw new MarshallingFailureException("JiBX marshalling exception", ex);
}
}
@Override
protected void marshalSaxHandlers(Object graph, ContentHandler contentHandler, LexicalHandler lexicalHandler)
throws XmlMappingException {
try {
// JiBX does not support SAX natively, so we write to a buffer first, and transform that to the handlers
SAXResult saxResult = new SAXResult(contentHandler);
saxResult.setLexicalHandler(lexicalHandler);
transformAndMarshal(graph, saxResult);
}
catch (IOException ex) {
throw new MarshallingFailureException("JiBX marshalling exception", ex);
}
}
private void transformAndMarshal(Object graph, Result result) throws IOException {
try {
ByteArrayOutputStream os = new ByteArrayOutputStream();
marshalOutputStream(graph, os);
ByteArrayInputStream is = new ByteArrayInputStream(os.toByteArray());
Transformer transformer = this.transformerFactory.newTransformer();
transformer.transform(new StreamSource(is), result);
}
catch (TransformerException ex) {
throw new MarshallingFailureException(
"Could not transform to [" + ClassUtils.getShortName(result.getClass()) + "]");
}
}
@Override
protected void marshalXmlEventWriter(Object graph, XMLEventWriter eventWriter) {
ContentHandler contentHandler = StaxUtils.createContentHandler(eventWriter);
marshalSaxHandlers(graph, contentHandler, null);
}
// Unmarshalling
@Override
protected Object unmarshalInputStream(InputStream inputStream) throws XmlMappingException, IOException {
try {
IUnmarshallingContext unmarshallingContext = createUnmarshallingContext();
return unmarshallingContext.unmarshalDocument(inputStream, null);
}
catch (JiBXException ex) {
throw convertJibxException(ex, false);
}
}
@Override
protected Object unmarshalReader(Reader reader) throws XmlMappingException, IOException {
try {
IUnmarshallingContext unmarshallingContext = createUnmarshallingContext();
return unmarshallingContext.unmarshalDocument(reader);
}
catch (JiBXException ex) {
throw convertJibxException(ex, false);
}
}
@Override
protected Object unmarshalXmlStreamReader(XMLStreamReader streamReader) {
try {
UnmarshallingContext unmarshallingContext = (UnmarshallingContext) createUnmarshallingContext();
IXMLReader xmlReader = new StAXReaderWrapper(streamReader, null, true);
unmarshallingContext.setDocument(xmlReader);
return unmarshallingContext.unmarshalElement();
}
catch (JiBXException ex) {
throw convertJibxException(ex, false);
}
}
@Override
protected Object unmarshalXmlEventReader(XMLEventReader eventReader) {
try {
XMLStreamReader streamReader = StaxUtils.createEventStreamReader(eventReader);
return unmarshalXmlStreamReader(streamReader);
}
catch (XMLStreamException ex) {
return new UnmarshallingFailureException("JiBX unmarshalling exception", ex);
}
}
// Unsupported Unmarshalling
@Override
protected Object unmarshalDomNode(Node node) throws XmlMappingException {
try {
return transformAndUnmarshal(new DOMSource(node));
}
catch (IOException ex) {
throw new UnmarshallingFailureException("JiBX unmarshalling exception", ex);
}
}
@Override
protected Object unmarshalSaxReader(XMLReader xmlReader, InputSource inputSource)
throws XmlMappingException, IOException {
return transformAndUnmarshal(new SAXSource(xmlReader, inputSource));
}
private Object transformAndUnmarshal(Source source) throws IOException {
try {
Transformer transformer = transformerFactory.newTransformer();
ByteArrayOutputStream os = new ByteArrayOutputStream();
transformer.transform(source, new StreamResult(os));
ByteArrayInputStream is = new ByteArrayInputStream(os.toByteArray());
return unmarshalInputStream(is);
}
catch (TransformerException ex) {
throw new MarshallingFailureException(
"Could not transform from [" + ClassUtils.getShortName(source.getClass()) + "]");
}
}
/**
* Create a new <code>IMarshallingContext</code>, configured with the correct indentation.
* @return the created marshalling context
* @throws JiBXException in case of errors
*/
protected IMarshallingContext createMarshallingContext() throws JiBXException {
IMarshallingContext marshallingContext = this.bindingFactory.createMarshallingContext();
marshallingContext.setIndent(this.indent);
return marshallingContext;
}
/**
* Create a new <code>IUnmarshallingContext</code>.
* @return the created unmarshalling context
* @throws JiBXException in case of errors
*/
protected IUnmarshallingContext createUnmarshallingContext() throws JiBXException {
return this.bindingFactory.createUnmarshallingContext();
}
/**
* Convert the given <code>JiBXException</code> to an appropriate exception from the
* <code>org.springframework.oxm</code> hierarchy.
* <p>A boolean flag is used to indicate whether this exception occurs during marshalling or
* unmarshalling, since JiBX itself does not make this distinction in its exception hierarchy.
* @param ex <code>JiBXException</code> that occured
* @param marshalling indicates whether the exception occurs during marshalling (<code>true</code>),
* or unmarshalling (<code>false</code>)
* @return the corresponding <code>XmlMappingException</code>
*/
public XmlMappingException convertJibxException(JiBXException ex, boolean marshalling) {
if (ex instanceof ValidationException) {
return new ValidationFailureException("JiBX validation exception", ex);
}
else {
if (marshalling) {
return new MarshallingFailureException("JiBX marshalling exception", ex);
}
else {
return new UnmarshallingFailureException("JiBX unmarshalling exception", ex);
}
}
}
}